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5b41052a-cd2f-4b8c-a20b-e6b1c24734f3 | alexander.brynes@elettra.eu
IPAC 2023, Venice, Italy, 7 –12 May 2023
Microbunching Mitigation –Laser Heater
5
Microbunching is characterised by the bunching factor : the depth
of modulations in the longitudinal profile of the bunch as a
function of frequency.
The bunching factor can be damped by increasing the... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOOG - MC07.1 - Accelerator Technology and Sustainability (Contributed)\MOOG2_talk.pdf | 4 |
f9631944-88b6-4b4f-af68-f9f7356f4394 | alexander.brynes@elettra.eu
IPAC 2023, Venice, Italy, 7 –12 May 2023
Direct Measurement –Transverse
Deflector
6
RF deflector Dipole magnet
Longitudinal
phase space
Streaking the beam transversely, then bending it
with a dipole, gives a measurement of the
longitudinal phase space.
This allows us to measure the... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOOG - MC07.1 - Accelerator Technology and Sustainability (Contributed)\MOOG2_talk.pdf | 5 |
9eab83ed-6474-4ec3-b783-b7bb714e573f | alexander.brynes@elettra.eu
IPAC 2023, Venice, Italy, 7 –12 May 2023
Direct Measurement –IR Spectrometer
7Vertical
slitSpherical mirror
F=200mm on
Vertical actuatorOTR
CaF2window
Lens CC
DOD2FLP1 FLP2
Motorized
translatorPyroFLP3CaF2
prismebeam
Vertical
slitMotorized
translatorFilter wheel
w ND filters
Filter wheel
... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOOG - MC07.1 - Accelerator Technology and Sustainability (Contributed)\MOOG2_talk.pdf | 6 |
bbe1ca32-0b22-47c4-b6c0-f19cc6df01b0 | alexander.brynes@elettra.eu
IPAC 2023, Venice, Italy, 7 –12 May 2023
Damping Microbunching via Linear
Optics Control
8𝑏𝑓𝑘,𝑠∝𝑒−𝑘𝑠2𝑅562𝑠𝜎𝛿02
2
The final bunching factor can
be damped by the momentum
compaction damped in the FEL
transfer line (spreader).
From Linac
To FEL
The line is now non -isochrono... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOOG - MC07.1 - Accelerator Technology and Sustainability (Contributed)\MOOG2_talk.pdf | 7 |
2830e5ff-d128-4440-86b1-4d26f12252bf | alexander.brynes@elettra.eu
IPAC 2023, Venice, Italy, 7 –12 May 2023
Commissioning the SPIR
9
By scanning the wavelength of
the SPIR, we find the strongest
modulations at around
1−2𝜇𝑚, in agreement with
theory.
We also see a correlation between
the bunch compression factor
(PYRO) and the signal on the
SP... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOOG - MC07.1 - Accelerator Technology and Sustainability (Contributed)\MOOG2_talk.pdf | 8 |
f67fd889-0302-4f2d-873e-d9ecee3aeb1f | alexander.brynes@elettra.eu
IPAC 2023, Venice, Italy, 7 –12 May 2023
Damping Microbunching via Transverse
Optics Control
10
On multiple occasions we have found configurations with
different optics in the spreader leading to:
Reduced MBI signal on SPIR.
Cleaner FEL spectrum.
The final bunching factor can
be ... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOOG - MC07.1 - Accelerator Technology and Sustainability (Contributed)\MOOG2_talk.pdf | 9 |
3f9e8026-957e-4081-a2c2-2f1d781e0a29 | alexander.brynes@elettra.eu
IPAC 2023, Venice, Italy, 7 –12 May 2023
Conclusions
11
Microbunching is one of the main barriers to
achieving full longitudinal coherence at x -ray FELs.
Recent work done at FERMI and elsewhere has
shown that the laser heater is not the only way to
remove the microbunching instabil... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOOG - MC07.1 - Accelerator Technology and Sustainability (Contributed)\MOOG2_talk.pdf | 10 |
1e3f4757-8409-4d78-95a9-3e184e516595 | alexander.brynes@elettra.eu
IPAC 2023, Venice, Italy, 7 –12 May 2023
Acknowledgements
12
This work has been made possible through the efforts of many people:
•FERMI : S. Di Mitri , G. Perosa, E. Allaria , L. Badano, G. De Ninno, G. Gaio, L. Giannessi, G. Penco , P .
Rebernik Ribič , S. Spampinati , C. Spezzani, M. T... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOOG - MC07.1 - Accelerator Technology and Sustainability (Contributed)\MOOG2_talk.pdf | 11 |
acf31d33-f497-4b89-a890-650ac496e2c6 | ADDITIVE MANUFACTURING OF COPPER RF STRUCTURES FOR
PARTICLE ACCE LERATOR APPLICATIONS *
J. Upadhyay†, J. Shoemaker, J. Bernardin, S. S. Kurennoy, J. Lyles , K. Bishofberger
Los Alamos National Laboratory, Los Alamos, USA
Abstract
Particle accelerators, employs many complex rf
structure made of copper. These... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOOG - MC07.1 - Accelerator Technology and Sustainability (Contributed)\MOOG3.pdf | 0 |
b93830fc-63e2-4a2c-950d-b5fdb3642a1f | existing technology, a bound metal deposition (BMD)
metal 3D printer is used to bu ild a c- band structure and
scaled model of 201.25 MHz RFQ structure .
INTRODUCTION
Many particle accelerators use normal conducting
accelerator structures for charge d particle acceleration.
These copper structures can be chall... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOOG - MC07.1 - Accelerator Technology and Sustainability (Contributed)\MOOG3.pdf | 0 |
34c442be-23ad-49b5-a510-c3ad8eeeccf3 | possibility of optimizing the shape without concern about the manufacturing. Additive m anufacturing provides the
opportunity to manufacture faster, with more flexibility in
design, cooling channel optimization, and potentially lower cost . The challenges are i) UHV compatibility ii)
Mechanical strength iii) Surface... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOOG - MC07.1 - Accelerator Technology and Sustainability (Contributed)\MOOG3.pdf | 0 |
ccaf65a2-498e-47f3-9c9a-287906faae57 | [4], and mechanical properties of metal printed wit h
additively manufactured techniques were explored [5,6].
Additive manufacturing produces three -dimensional
parts with the help of a computer -aided design and adding
materials layer by layer. Currently, there are two main
methods to additively fabricate the... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOOG - MC07.1 - Accelerator Technology and Sustainability (Contributed)\MOOG3.pdf | 0 |
25edb5bc-eccf-477d-abb2-5a8ce3800bbc | chosen to print a copper RFQ [1,2]. ii) The second method
is the electron be am melting method where a high -power
electron beam is used to fuse the metallic powder and print a layer -by-layer structure out of it [8]. There are some
promising advantages of (EBPF) such as 99% purity
copper fabrication and electrica... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOOG - MC07.1 - Accelerator Technology and Sustainability (Contributed)\MOOG3.pdf | 0 |
6df4ba79-4bf1-405c-b3e5-7e486b40beed | (EP) has to be developed for addit ive manufacturing
technology similar to the development of subtracti ve
manufacturing technology for producing a defect -free and
smooth surface [10].
Multiple accelerator applications accelerate particles to
significant energies within a limited footprint, naturally calling for... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOOG - MC07.1 - Accelerator Technology and Sustainability (Contributed)\MOOG3.pdf | 0 |
ae395549-b3a8-444a-9410-6ffff4fa3d5e | We are additively manufacturing a 2- cell C-band
accelerating structure with distributed RF coupling. It is
designed to accelerate protons at 1.6 GeV ( β = v/c = 0.93)
[13]. A traditional copper version of the structure was fabricated using precise machining. It was tuned to 5.712
GHz and tested at high gradients... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOOG - MC07.1 - Accelerator Technology and Sustainability (Contributed)\MOOG3.pdf | 0 |
67bd5d23-02b9-4665-a74d-892cd2a0b54c | accuracy. This structure would later be electropolished
and tested for high gradient RF performance.
EXPERIMENT AL SETUP
The experiment is conducted on multiple additive
manufacturing machines to evaluate the advan tages and
challenges unique to each printing method on the direct
manufacture of accelerator s... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOOG - MC07.1 - Accelerator Technology and Sustainability (Contributed)\MOOG3.pdf | 1 |
e0fa033f-881f-4edd-b29f-8fd868139114 | then chemically washed and sintered to remove the binder
constituents and fuse the metal powder to form a
consolidated metal part.
BMD processing requires significant support structure
for surfaces of the part at angles of more than 45° from
vertical . This support structure can be difficult to remove,
especiall... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOOG - MC07.1 - Accelerator Technology and Sustainability (Contributed)\MOOG3.pdf | 1 |
4b7faf5a-332c-449c-a676-e031e3156650 | removed from the component. The component is then
electroplated with copper and the surface is
electropolished to application requirements.
The third experiment is conducted on an Electron Beam
Melting (EBM) machine. An Arcam Q10plus v2.0 was
used to print high purity copper. The resulting component
does not r... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOOG - MC07.1 - Accelerator Technology and Sustainability (Contributed)\MOOG3.pdf | 1 |
19abeecb-2c47-42a2-ab59-4304d321ebec | deposition diameter and are expected to require signifi cant
surface finishing to maximize the quality factor of the
structure. Further, the BMD process was observed to
linearly scale the CAD geometry by approximately 15%
about the centroid of the part. This scaling accommodates
for anticipated component shrinkage... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOOG - MC07.1 - Accelerator Technology and Sustainability (Contributed)\MOOG3.pdf | 1 |
5d168e26-fe91-4392-91cf-af194d999c9d | first met hod (BMD) is shown in Fig.1. The 3 -D printed
cavity is shown in top while conventionally
manufactured cavity is shown in bottom.
CONCLUSION
We are additively manufacturing copper rf structure to
use in particle accelerators. We have chosen to build a C -
band TM 010-type cavity of 5.712 GHz frequency.... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOOG - MC07.1 - Accelerator Technology and Sustainability (Contributed)\MOOG3.pdf | 2 |
6d08c12d-0f21-465a-a6a7-d06640b395f9 | Alamos National Laboratory .
REFERENCES
[1] T. Torims et al., “First proof-of- Concept Prototype of an
Additive Manufactured Radio Frequency Quadrupole ”,
Instr ., vol. 5 p. 35, 2021.
doi:10.3390/instruments5040035
[2] T. Torims et al. , “Evaluation of Geometrical Precision and
Surface Roughness Quality fo... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOOG - MC07.1 - Accelerator Technology and Sustainability (Contributed)\MOOG3.pdf | 2 |
09605c18-65c7-41b3-83d3-1a48a4e7313f | arXiv:2211.15500v1 , 28 Nov 2022.
[5] S. Jenzer et al., “Is it possible to use additive manufacturing
for accelerator UHV beam pipes? ”, J. Phy. Conf. Series ,
vol. 1067, p . 082026, 2018. doi:10.1088/1742-
6596/1350/1/012199
[6] N. Delerue et al., “Prospects of Additive Manufacturing for
Accelerators”, in Proc... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOOG - MC07.1 - Accelerator Technology and Sustainability (Contributed)\MOOG3.pdf | 2 |
90e51fe0-294c-43f8-8635-0c2793ddd89b | [9] S. Megahed et al ., “Manufacturing of pure copper with
electron beam melting and the effect of t hermal and
abrasive post-processing on microstructure and electric
conductivity ”, Materials , vol.16 p. 73, 2023.
doi:10.3390/ma16010073 [10] J. Mu et al., “Application of electrochemical polishing in
surface ... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOOG - MC07.1 - Accelerator Technology and Sustainability (Contributed)\MOOG3.pdf | 2 |
20c5db40-a5d9-4bef-9b6b-56fb27858f79 | Accelerator Conf. (IPAC’21), Campinas, Brazil pp. 1057-
1059. doi:10.18429/JACoW- IPAC2021- MOPAB341
[13] S. S. Kurennoy et al ., "High -Gradient accelerating
structures for proton radiography booster Linac", presented
at IPAC’23, Venice, Italy, paper TUPM007, this
conference. | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOOG - MC07.1 - Accelerator Technology and Sustainability (Contributed)\MOOG3.pdf | 2 |
302f7613-ec53-4792-81f8-70f7415a15c2 | Additive Manufacturing of Copper RF Structures
for Particle Accelerator Applications
J. Upadhyay, J.M. Shoemaker, J.D. Bernardin, K. Bishofberger,
S.S. Kurennoy and J.T.M. Lyles
Los Alamos National Laboratory, Los Alamos, NM, USA | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOOG - MC07.1 - Accelerator Technology and Sustainability (Contributed)\MOOG3_talk.pdf | 0 |
9e90d1b8-c7c7-4376-a627-b9cca09dee60 | Additive Manufacturing of Copper RF Structures for Particle
Accelerator Applications
1. Additive Manufacturing Review
2. Motivation for C-Band Structures
3. Manufacturing Set-Up & Results4. Chemical Polishing and RF Tests
5. Future Plans | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOOG - MC07.1 - Accelerator Technology and Sustainability (Contributed)\MOOG3_talk.pdf | 1 |
fbe3d0e9-c7f9-40ee-be93-ea1edc26fb63 | Additive Manufacturing of Copper RF Structures for Particle
Accelerator Applications: Review Laser Powder Bed Fusion (LPBF)
Schematic of a typical LPBF Machine
S. Chowdhury et al . Journal of Materials
Research and Technology, 2022, 20, 2109Challenges
1. Due to reflection high purity copper fabrication is difficult
... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOOG - MC07.1 - Accelerator Technology and Sustainability (Contributed)\MOOG3_talk.pdf | 2 |
2959c49e-9500-42b7-b954-106ddfc93156 | Additive Manufacturing of Copper RF Structures for Particle Accelerator
Applications: Review Electron Beam Powder Bed Fusion (EPBF)
Challenges
1. Charging process of ambience due to electron
beam
2. Secondary electron production due to electron
beam
Possible Benefits
1. Cu maximum relative density of 99.99 % was
a... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOOG - MC07.1 - Accelerator Technology and Sustainability (Contributed)\MOOG3_talk.pdf | 3 |
5ffe1265-a7b0-4179-8c47-2b4e3e55e296 | Additive Manufacturing of Copper RF Structures for Particle
Accelerator Applications (Other Accelerator Lab Work)
H. Hähnel and U. Ratzinger
“First 3D Printed IH-Type
Linac Structure—Proof-of-
Concept for Additive
Manufacturing of Linac RF
Cavities”
Instruments 2022, 6, 9
C. Wehner, J. Merrick,
B. Shirley, B. We... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOOG - MC07.1 - Accelerator Technology and Sustainability (Contributed)\MOOG3_talk.pdf | 4 |
29e04e17-0618-4929-8937-437701fc6bcc | Additive Manufacturing of Copper RF Structures for Particle
Accelerator Applications (Review)
Possible Benefits
1. New and complex shapes (shape optimization
without worrying how it will be manufactured)
2. Optimized cooling channels (for targeted
cooling)
3. Mesh structure 4. Topological optimization
5. Economica... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOOG - MC07.1 - Accelerator Technology and Sustainability (Contributed)\MOOG3_talk.pdf | 5 |
e2007c7f-744c-4d5f-b6a3-621df9687d19 | LANL C-band Engineering Research Facility (CERF-NM)
CERF-NM was built with $3M of LANL’s internal
infrastructure investment.
•Powered with a C-band Canon klystron
•Conditioned to 50 MW
•Frequency 5.712 GHz
•300 ns – 1 µs pulse length
•Rep rate up to 200 Hz (typical 100 Hz)
•Nominal bandwidth 5.707-5.717 GHz
cavity mo... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOOG - MC07.1 - Accelerator Technology and Sustainability (Contributed)\MOOG3_talk.pdf | 6 |
8b25ab6a-2ae1-4459-a113-af24b0f44094 | Additive Manufacturing of Copper RF Structures for Particle
Accelerator Applications (Setup & Results)
LPBF and EBM machines,
GE Additive, 2023
Bound Metal Deposition (BMD)
processing schematic,
Markforged, 2023 | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOOG - MC07.1 - Accelerator Technology and Sustainability (Contributed)\MOOG3_talk.pdf | 7 |
c96de4d3-c289-4294-8049-821be18fd846 | Additive Manufacturing of Copper RF Structures for Particle
Accelerator Applications (Setup & Results)
Copper RF structure in-situ during the bound metal
deposition process on the Markforged Metal X
Los Alamos, NM, USAC-band copper cavity, machined half.
S. Kurennoy et al ., "High-Gradient
Accelerating Structures fo... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOOG - MC07.1 - Accelerator Technology and Sustainability (Contributed)\MOOG3_talk.pdf | 8 |
210ec52e-fe9c-4461-a7ae-0db681043950 | Additive Manufacturing of Copper RF Structures for Particle
Accelerator Applications: Setup & Results
Surface Improvement Methods
1. Mechanical polishing
2. Electrochemical polishingMeasurements
1. High vacuum performance
2. Resonance frequency and field profile (bead pull)3. Low power RF test4. High gradient tests
Ch... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOOG - MC07.1 - Accelerator Technology and Sustainability (Contributed)\MOOG3_talk.pdf | 9 |
580ad753-d681-46ca-8a0b-6857cfb98faf | Additive Manufacturing of Copper RF Structures for Particle
Accelerator Applications (Future Plans)
1. Additively manufacture C-band cavity
2. Chemically polish surface to get the same surface roughness as in
conventionally manufactured cavity
3. Evaluate for dimensional conformance to C-band design definition 4. Te... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOOG - MC07.1 - Accelerator Technology and Sustainability (Contributed)\MOOG3_talk.pdf | 10 |
fba87e2b-b140-4ff3-b23e-a809f9a0cfca | PRELIMINARY LATTICE DESIGN FOR THE RAPID CYCLING
SYNCHROTRON IN THE SPPC
L. Zhang*, J. T ang†, University of Science and Technology of China, Hefe i, China
Abstract
The Rapid cycling synchrotron (p- RCS) is the first
synchrotron of the accelerator chain in the proposed Super
Proton- Proton Collider (SPPC) pro... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA001.pdf | 0 |
fd360c9d-57d1-4b84-88ad-17fe8bb3f4ae | dynamics. In this paper, three types of linear lattice for the p-RCS, which are based on the basic FODO module s,
triplet module s and negative momentum compactio n
(NMC) factor module s, respectively, are compared. Taking
into consideration the longitudinal beam dynamics which
requires as a large absolute of phase... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA001.pdf | 0 |
8533699f-a6ea-4dd1-b8bc-e983f3fc52ef | [1]. As the first synchrotron of the SPPC accelerator chain, the p -RCS is a rapid cycling synchrotron with a repetition
rate of 25 Hz and a designed energy range from 1.2 GeV to
10 GeV . Its goal is to provide the downstream accelerators
with the required beam properties for SPPC collision. Additionally, it could... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA001.pdf | 0 |
90f38f26-b92b-493b-9e22-ff42f7eb1efb | Otherwise, the RF voltage at the p -RCS extraction would
be very low, leading to extremely heavy beam loading. As
the phase slippage f actor
η is closely related to the
momentum factor αp, which is a critical lattice parameter,
special attention is paid to the lattice design. In this paper,
we will present and... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA001.pdf | 0 |
12316c4b-88b1-495b-9350-9bfbda000cf3 | following are the specific requirements:
• Maximize the absolute value of the phase slippage
factor η, to satisfy the longitudinal phase space
matching between the p -RCS and the MSS.
• The circumference is about 1000 m, with the injection
and extraction kinetic energy of 1.2 GeV and 10 GeV,
respectively, and ... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA001.pdf | 0 |
2f68534b-aa14-49e1-afa1-af0d66db05b8 | • The rms tran sverse geometric emittance at injection
energy is 10 πmm⋅ mrad , while the ring acceptance is
100 πmm⋅mrad .
• The maximum field strength of the main dipole
magnet s is limited to about 1 T , and the vertical beta
function βy at dipoles should be as small as possible
to reduce the magnet gap an... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA001.pdf | 0 |
2e86a518-f2fe-4a04-9c9c-1b9dee98dcc4 | the standard FODO focusing structure can utilize the min-imum families of quadrupoles.
In a standard FODO cell, the average dispersion over the
cell is [3]:
211
4 12 sin 2ccxLDθ
µ= − (1) | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA001.pdf | 0 |
807a469e-50e4-4e0d-a2f6-6640bf2757a3 | where Lc, θc and µ are the length, bending angle and phase
advance of the FODO cell. Normally, a 90° phase advance
per FODO cell is utilized for proton synchrotrons with
equal horizontal and vertical emittance εx = εy, and the p-
RCS is the case. As a result, the product of the cell length and bending angle must me... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA001.pdf | 1 |
340a56ae-6a09-4390-989c-41bdeefdad08 | side of the arc. Each dipole has a length of 3.2 m and a
curvature radius of 36.669 m.
The 26 quadrupoles in one superperiod are divided into
two families: focusing quadrupoles (QF) and defocusing quadrupoles (QD). Each quadrupole has the same length of
1.08 m, but the QF and QD have diff erent field gradients
o... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA001.pdf | 1 |
bcb78aac-5e1f-45f7-8219-2fb2fd9bf429 | in a phase slippage factor of -2.99 × 10
-3 at extraction. The
betatron tunes are (22.13, 18.97), which can be adjusted by
slightly modifying the strengths of the LSS quadrupoles.
Lattice with Triplet Module s
A triplet cell can provide the equivalent focusing and
small waist points in both the horizontal and ve... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA001.pdf | 1 |
36c31ecc-9348-43ea-887f-c2a0e39ec0a4 | each consisting of 6 triplet cells with a length of
appro ximately 16.12 m per cell. The superperiod lattice
composed of triplet cells is shown in Fig. 2.
Figure 2: One superperiod composed of Triplet module s.
Each superperiod includes 6 dipole magnets with the
same curvature radius of 36.287 m. However, the... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA001.pdf | 1 |
724becc9-58c4-41f1-8646-0e8605dbd898 | quadrupoles in the LSS belong to two categories, with
lengths of 0.7 m and 1.4 m, and magnetic field gradients of
5.97 T/m and 5.83 T/m, respectively. The 6 quadrupoles in
the middle are symmetrical about the midpoint. The 3
quadrupoles on the left side of the midpoint belong to three
familie s, with lengths of 1... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA001.pdf | 1 |
4a0b467c-6644-4aa6-b830-5ddd5b64497c | along with giving a large absolute value of the phase slip-
page factor. A modular approach for the NMC lattice has been well developed [6], which is based on resonantly cor-
related functions of the orbit curvature and the gradient modulation of q uadrupoles [7], and successfully applied to
the J-PARC/MR [8], the d... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA001.pdf | 1 |
4272e544-17d1-47d4-83f2-abf6c28d847a | The NMC module comprises three cells, with two
FODO cells (with different focusing and defocusing
strength s) on both sides and a n optical matching cell with
a missing bend in the middle, which is centrally symmetric.
The matching cell is composed of two quadrupole dou-
blets, with gradients different from the one... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA001.pdf | 2 |
43c22fb1-3341-40f7-ac4e-1a230f36b5dd | with a maximum quadrupole strength of 6.55 T/m and a
bending magnet length of 4.8 m. The horizontal and verti-
cal phase advances are speci ally designed as 3π /2 and 5π /4,
respectively. Each module has 4 identical bending magnets
with the same length and curvature radius of 4.8 m and
36.669 m, respectively.
The... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA001.pdf | 2 |
26d83c84-87e1-4b1c-8c62-836f537224b3 | -2 in the ex-
traction.
COMPARISON
The main characteristics of the three types of linear
lattice designs are summarized in Table 1. The FODO-
module lattice has minimum quadrupole families and the
smallest maximum beta function and beta function at
dipoles , indicating the minimum aperture s for the
quadrupoles... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA001.pdf | 2 |
1d640814-4c35-41e1-a0d9-ea8bb60d18f2 | function and beta function at dipoles are relatively large .
Table 1: Comparison of Different Types of Lattice
Lattice type FODO Triplet NMC
Circumference (m) 967.2 967.2 967.2
Number of superperiods 6 10 3
Number of quadrupole s 156 180 138
Families of quadrupole s 2 5 4
βmax (m) 21 40 52
βy at dipole... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA001.pdf | 2 |
1a2374df-0dea-429b-b42a-e93e2bdcfb7a | dynamics that requires as a large absolute of phase slippage
factor as possible at the extraction energy. However, the linear lattice also needs to be re -evaluated when the global
parameters like the betatron tunes and nonlinear beam dynamics are involved, which is the next step in the future.
REFERENCE S
[1] J... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA001.pdf | 2 |
567d137f-d09d-480f-9c9e-2559a21ba2be | [3] A.W. Chao, et al., Handbook of accelerator physics and
engineering: 2nd Edition, World Scientific, p. 78, 2013 .
doi:10.1142/8543
[4] S. Wang and Q. Qin, “The Optimization of Beam Dynamics
Design for CSNS/RCS”, in Proc. IP AC'10 , Kyoto, Japan,
May 2010, paper MOPEC070, pp. 630- 632.
[5] F.H. Bohn et al... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA001.pdf | 3 |
4769f265-aacd-4023-994d-2a2b7fecf362 | SEXTUPOLE OPTIMIZATION AT RAPID CYCLING SYNCHROTRON IN
CHINA SPALLATION NEUTRON SOURCE
Yuwen An1;2∗, Liangsheng Huang1;2, Shouyan Xu1;2, Sheng Wang1;2
1Institute of High Energy Physics, Chinese Academy of Sciences (CAS), Beijing 100049, China
2Spallation Neutron Source Science Center, Dongguan 523803, China
Abstract
Th... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA002.pdf | 0 |
120d7a71-0125-475e-a8d9-48ae9b549d34 | the sextupole location, the dynamic aperture of the RCS has
been significantly increased. This paper aims to provide
a comprehensive review of the operation status of the sex-
tupoles and propose several upgrade plans to enhance the
performance of the CSNSII.
INTRODUCTION
The China Spallation Neutron Source(CSNS) is a ... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA002.pdf | 0 |
8e553d7b-e66b-4724-8a13-26979b1e2bd5 | tripletcellandwithacircumferenceof227.92m. Thelinear
latticeiscomprisedof48quadrupoleswith5familiesand
24dipoleswithasinglepowersupply. Duringthe2021sum-
mer maintenance, 16 trim quadrupoles were installed in the
accelerator. Additionally,the powersuppliesof sextupoles
werechangedtoACpowersuppliesduringthesamemain-
ten... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA002.pdf | 0 |
8b503756-9856-4db3-b5b0-6f70cd7e0176 | harmonic cavities to enlarge the bunch factor, and the use
of momentum collimators to scratch the beam halo at the
∗anyw@ihep.ac.cn
Figure 1: Twissparameters of the RCSone super-period.
longitudinal plane. AC sextupoles will be used to correct
chromaticity and suppress head-tail instabilities.
This paper is structured ... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA002.pdf | 0 |
e9aabdad-3339-405f-88b1-862c263b5207 | Superperiodicity 4
Injection energy 0.8(MeV)
Extraction energy 1.6(GeV)
Acceptance 540( 𝜋mm−mrad)
Number of ring magnets
-dipole magnets 24with 1 family
-quadrupole magnets 48with 5 families
-trim quadrupole magnets 16with 16 families
-sextupoles 16with 4 families
BEAM COMMISSIONING WITH AC
SEXTUPOLES
The operation of... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA002.pdf | 0 |
89194ada-cd9c-4678-9a68-c903e4806955 | rectedthenaturalchromaticityof-4/-9(H/V)to-9/-9(H/V),
effectively suppressing beam instability.
However, the operational experience at CSNS suggests
thattheuseofsextupolescanreducebeamtransmissionrates.
Therefore,itiscrucialtobalancetheabilityofsextupolesto
suppressbeaminstabilitywiththeirimpactonbeamtrans-
missionrate... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA002.pdf | 1 |
bae3ab02-6d4e-43e5-8c42-2cee115bd947 | tion,𝑏2isthefieldstrengthsofthesextupolemagnet, 𝐿isthe
lengthofthesextupolemagnet,and 𝛽isthebetafunction
of the particle in that region. The operational experience of
CSNSI shows that in order to suppress the head-tail instabil-
ityof theparticlebeam, the machine’schromaticitymustbe
maintainedintherangeof-9/-9. Inth... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA002.pdf | 1 |
93195227-e592-4631-a6bc-0558ce3af8a8 | resultsdemonstratethattheappropriatepositioningofthe
sextupolemagnetneartheQ222magnetcanleadtoasmaller
sextupolemagnet strengthunder thesame chromaticityset-
ting. The dynamic aperture corresponding to the chromatic-
ity of -9/-9 before the optimization of the sextupole magnet
positionisshowninFig.3,whilethedynamicaper... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA002.pdf | 1 |
13d9c39e-25c5-4df3-9226-6e499611ece0 | the sextupoles.
SIMULATION FOR CSNSII
CSNSII aims to deliver a power of 500 kW, which is five
times that of CSNSI. In this section, we will study the dy-
namic characteristics after the optimization of the sextupole
magnet position.
PyORBIT [5] is an open-source software package for
simulatingbeamdynamicsinaccelerators... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA002.pdf | 1 |
b78cb895-d6f8-4e26-8ae9-fcf6209bb280 | seenfromthefigurethatasthechromaticityincreases,the
tune spread decreases.
Fig.6showsthevariationofbeamtransmissionefficiency
correspondingtodifferentchromaticities. Interestingly,with
the increase of sextupole magnets, the beam transmission
rate decreases. Without sextupole magnets, the transmis- | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA002.pdf | 1 |
b633e719-4670-4511-a4ad-a4641ae9cf15 | Figure 5: tune spread at different chromaticities
Figure 6: beam transmission rate at different chromaticities
sion rates with chromaticity correction of −1/−1,−8/−8,
and−10/−10 are99.98%,99.88%,99.97%, and99.71%,
respectively. Thereasonforthisisalsoeasytounderstand.
The natural chromaticity of RCS is -4/-9. The sextup... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA002.pdf | 2 |
ebdc3126-5d15-4427-bec2-7484c0414ff7 | Figure 8: Emittance comparison at different chromaticities
Thecaseofbeam 99.99%normalizedemittanceisshown
in Fig.8. It can be seen from the figure that the evolution
of beam emittance is related to the beam loss. Without sex-
tupolemagnets,thebeamemittanceisthesmallest. When
themachinechromaticityiscorrectedto-8/-8,the... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA002.pdf | 2 |
de3f2285-1ede-41bc-97dd-60741085633e | sextupolemagnetsanddiscoveredthattheirstrengthcould
bereducedwhilestillmeetingthesamechromaticityrequire-
ments. Through simulations using Py-Orbit, we observed
an increase in the dynamic aperture from the FMA and a
reduction in beam loss.
REFERENCES
[1]S. Wang, S. X. Fang, Q. Qin, J. Y. Tang, and J. Wei, Introduc-
tio... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA002.pdf | 2 |
39171bf5-f4ae-474d-9c16-29ccdf20d9bf | of the circular accelerators,Nuclear Instruments and
Methods in Physics Research A 451 (2000) 545-557.
https://doi.org/10.1016/S0168-9002(00)00345-4
[5]A. Shishlo, S. Cousineau, J. Holmes, and T. Gorlov, “The
Particle Accelerator Simulation Code PyORBIT”, Procedia
ComputerScience , vol. 51, pp. 1272-1281, 2015.
doi:1/z... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA002.pdf | 2 |
ca637ebf-b8d6-4852-9ef6-bc14e83b4c02 | DOUBLE ACHROMAT SOLUTI ON WITH A DEDICATED
COLLIMATION SYSTEM FOR THE MEBT-3 SECTION OF MYRRHA*
E. Traykov†, E. Bouquerel, IPHC, CNRS-IN2P3, Strasbourg, France
F. Bouly, E. Froidefond, UGA/CNRS /Grenoble INP, LPSC-IN2P3, France
S. Chancé, L. Perrot, Université Paris-Saclay, CNRS-IN2P3, IJCLab Orsay, France
U. Dor... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA004.pdf | 0 |
d5e9f637-ace8-4442-b63e-1c25aa3904f8 | A universal tool for compensation of various failure sce-narios in linacs has been developed [3].
The design and the performance of the Medium Energy
Beam Transfer section (MEBT-3) of the accelerator are critical for the operation of the linac and the subsequent
high energy beam lines towards the experimental facili... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA004.pdf | 0 |
ba236f14-616a-49f1-a997-6e8e3a9a7d33 | The MEBT-3 transport secti on connects the two injectors
to the main linac (Fig. 1). It is divided into 8 subsections (4
in each injector branch) according to their purpose. The
first subsection (collimation subsection) serves to
fully characterize the beam af ter the CH-linac and accom-
modates a collimation sy... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA004.pdf | 0 |
5b4bd9fd-172d-40fe-b6b5-94c4353276c3 | • Maximal beam transmission
• Double achromaticity
• Minimal emittance growth (at 4 mA) Collimation Subsection
The subsection contains a quadrupole triplet, numerous
beam diagnostic elements, and a beam collimation system.
The latter consists of three X/Y collimators positioned
equidistantly along the line for i... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA004.pdf | 0 |
8de68b5f-b04d-4742-b937-e8067b3e10ee | longitudinal phase matching at the linac entry. The quadru-pole triplet serves for transporting the beam through the re-
buncher and adjusting the beam for the desired entry into
the deviation subsection, i.e. converging in the horizontal plane (X) and diverging in the vertical (Y).
Achromatic Deviation Subsection
T... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA004.pdf | 0 |
8cfdae43-e1a3-49ec-abb9-8476fee947f9 | the angular dispersion D’ are minimized simultaneously at
the exit of the second switching dipole magnet. The latter
allows connecting both injectors to the linac at the end of
the MEBT-3 section.
Beam Dump Subsection
The deflected beam from the unused injector is trans-
ported towards a dedicated high-power beam ... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA004.pdf | 1 |
55c25f52-26bf-49e1-a0e3-866af91f4463 | BEAM TRANSPORT
To reach the desired specifications, the design and tuning
of the MEBT-3 have been studied extensively by beam dy-
namics simulations with TraceWin [5]. The beam simula-
tions have been performed with inclusion of space charge effects in both Envelope and P ARTRAN modes with simu-
lated particle dist... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA004.pdf | 1 |
8313cc8c-c399-4551-824c-d571ca64aecd | the deviation with a horizontally converging and vertically diverging beam. The double achromaticity (X and X’) is
restored at the end of the deviation subsection by the use of
two symmetrically placed and tuned quadrupole doublets (Fig. 2).
Various transverse and longitudinal beam diagnostics,
such as beam profil... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA004.pdf | 1 |
a7f00623-d69f-4d54-a207-531e3ee2804b | the shapes of the magnet poles. A dedicated design study of the magnets is foreseen and the present results of the
beam dynamics simulations are going to be verified and
eventually readjusted after th e inclusion of the field maps
for all magnetic elements.
Figure 2: The top panel shows 6- σ envelopes in the tw... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA004.pdf | 1 |
81f22e0d-5ee7-4771-81f2-fecced2cc41d | COLLIMATION SYSTEM
The collimation system is designed to protect the ele-
ments downstream in the ME BT-3 and the main linac dur-
ing beam transients and in case of element failures in the
injectors. A double waist is required at the second collima-tor COL2 . This allows to form a converging beam at the
collimator C... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA004.pdf | 2 |
ba3f39e2-b6de-47b8-ac92-d42589cc8f3f | positions of the collimation system in MEBT-3. The beam is converging at COL1, reaching a double waist at COL2,
and diverging at COL3. The grey rectangles represent the
effect of the collimation on the phase space at the three col-limation positions. The selected collimator configuration fully covers the transverse ... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA004.pdf | 2 |
79059ec6-a1a3-4caf-88b3-0e5901fe1129 | played example is for 6- σ size of 20 mm at the beam dump.
CONCLUSION
The MEBT-3 transport section have been studied exten-
sively by simulations in the past several years. The section
evolved, going through several modifications, since the original lattice. The new additions, such as using only one
room-temperatur... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA004.pdf | 2 |
b7f59723-d7a6-4485-aee9-9d0c1a80a049 | REFERENCES
[1] J.-L. Biarrotte, D. Uriot, H. Klein, H. Podlech, D. Maeder,
R. Tiede, C. Zhang, D. Vand eplassche, “Design fine-tuning
& beam simulation codes benchmarking,” MAX DELIVER-
ABLE 1.2, 2013.
[2] D. Uriot, F. Bouly, M. Ba ylac, D. Bondoux, E. Froidefond,
A. Gatera, A. Ponton, D. Vandeplassche, E. Traykov... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA004.pdf | 2 |
a4c106ec-dd3f-400b-9b82-40c67508ef87 | [4] L. Perrot, S. Chancé, U. Dord a, L. De Keukeleere, J. Van de
Walle, E. Traykov, E. Bouquerel, F. Bouly, E. Froidefond,
“Detailed Design Studies of the High En-ergy Beam
Transport Line of MINERV A Project at SCK-CEN”, pre-
sented at the 14th International Particle Accelerator Conf.
(IPAC’23), Venice, Italy, May ... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA004.pdf | 2 |
45995594-4fb7-4978-a70b-30712152143c | STATUS OF CARIE FACILITY DESIGN AND CONSTRUCTION*
W. C. Barkley†, A. Alexander, N. Fotiades, W. B. Haynes,
D. Rai, E. I. Simakov, Los Alamos National Laboratory, Los Alamos, USA
Abstract
Building new experimental facilities to house experi-
ments is an expensive and time-consuming activity. Alt-hough usually less ... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA008.pdf | 0 |
15729400-c6a3-4586-abdb-7b61185562fd | niques and process to repurpose an existing experimental facility to accommodate the Cath odes and RF Interactions
in Extremes (CARIE) compact accelerator and the choices
made to select and size equipment for success. Radio Fre-quency (RF) energy waveguide layout with vacuum calcu-
lation methods will be included as ... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA008.pdf | 0 |
92b92d20-bc3c-435d-9cdb-291aeb21a3f6 | pact electron accelerator in th e C-Band (5.707 –5.712 GHz)
of Radio Frequency (RF) was submitted to the Laboratory
Directed Research and Development (LDRD) funding
source. This proposal was chosen based on previous re-search and development success with the C-band Engineer-
ing Research Facility in New Mexico (CERF... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA008.pdf | 0 |
1b1f58b1-b227-4368-90fb-1d90af0eac00 | and a 30 cm thick steel roof. A 33-ton moveable shield door separates the vault from the control room. When closed
during operation, the door protects personnel from neutron
radiation, bremsstrahlung radiation and activated air. Mounted on four sets of Hilman rollers and guided by tracks on the floor, the door is ope... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA008.pdf | 0 |
a643864a-57bc-4cdd-8e16-b5686d218a18 | vault room. A waveguide, from the klystron through a pen-etration in the roof, was routed to the AFEL experiment in
the vault. Electrical power for the klystron, modulator, la-
ser and instrumentation was installed and still available to re-use. Water cooling for the klystron, modulator, wave-
guide and experiment was... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA008.pdf | 0 |
a579bc42-9037-42cb-9ddd-2580dcee8177 | it is adequate to be reliably repurposed.
Infrastructure funding was provided last year (FY22) by
LANL to prepare the vault room for a new experiment.
Since a scanning electron mi croscope (SEM), glovebox,
tools and supplies were residing there, an effort to relocate
and salvage these items commenced. After the ro... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA008.pdf | 0 |
7111d865-d8c7-4768-b573-284651e68ec1 | Figure 2: Process and Instrumentation Diagram (P&ID).
PRELIMINARY DESIGN
When fully implemented, CARIE will be a compact
electron accelerator producing 7 MeV particle beam. The
electrons are initiated using a laser excited photocathode in a resonant cavity. The resonant cavity also serves as the in-jector [2].
Fig... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA008.pdf | 1 |
822ebcb8-d03c-43bb-9049-f1da5eeefd89 | energy from the klystron is output into a WR187 rectangu-
lar waveguide then split into two halves by a magic tee that protects the klystron from excess reflected power. Rough-
ing, ion and turbo vacuum pumps were placed strategically
along the system to achieve the required pressure in a pre-
scribed period of time p... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA008.pdf | 1 |
e4a10253-6fef-4c75-8d86-929e180310e3 | waveguide system. Based on the CERF-NM design [3], the waveguide system delivers 50 MW pulses with the pulse
length between 300 ns and 1 microsecond, repetition rate
up to 200 Hz, and is tuneable within the frequency band of 5.707 GHz to 5.717 GHz.
The waveguide continues through an existing penetra-
tion on the ro... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA008.pdf | 1 |
0f302f95-0d00-4c6e-8826-a63bfbb2e82e | tional coupler, magic tee, wate r loads and associated vac-
uum pumps.
SYSTEMS REQUIREMENTS
Electrical outlets dedicated to the AFEL experiment
were tested to be operational and will be repurposed for CARIE. The klystron/modulator is the main power con-
sumer requiring 480V/3Phase/100 A. This power require-
ment wa... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA008.pdf | 1 |
c6249cf8-030b-437b-a374-2745a9c2bada | gauges, controllers, computer and display screens require
electrical power per the c ontrol and instrumentation
scheme shown in Fig. 5:
Figure 5: Control and Instrumentation Scheme.
Water cooling is necessary fo r the klystron, injector and
future solenoid magnet. An air-cooled chiller was pur-chased to deliver ... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA008.pdf | 2 |
fb877ab2-06cb-46c5-bb80-78a386a9d5ec | -8 Torr) and injector
(5X10-9 Torr). To achieve the specification in the wave-
guide required that the ion pumps be equally spaced as in
a lumped parameter system [4]. An analysis was performed
to optimize the distance between these pumps. The ion pumps are directly connected to pumping ports that are
strategically... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA008.pdf | 2 |
1565a7a8-fea1-48e2-892a-343e10362b88 | mined the number of pumps and their spacing in the wave-
guide. The Excel spreadsheet an alysis optimized base pres-
sure achieved after 24 hours of pumping using standard
outgassing rates for ultra-high-vacuum grade waveguide.
Neglecting baking, this optimization concluded that four each, 40 l/s ion pumps distribu t... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA008.pdf | 2 |
8ce27344-d9de-4b08-80e3-f05fad6bbbf6 | Radiation shielding requirements were simulated for a
rectangular 30X60 cm beam dump in the middle of the ex-
perimental area. This beam du mp was comprised of a stack
consisting of 10 cm thick lead, 20 cm thick steel and 10 cm
thick poly. The Monte Carlo simulation was accomplished
using MCNPX code with 20 MeV ele... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA008.pdf | 2 |
bdd37bd2-3601-4da7-9032-389b3ffb3ee6 | Rays at Beam Height.
REFERENCES
[1] E. I. Simakov et al. , “High Gradient High Efficiency C-Band
Accelerator Structure Research at LANL”, in Proc. NA-
PA C ' 1 9 , Lansing, USA, Sep. 2019, pp. 882-884.
doi:10.18429/JACoW-NAPAC2019-WEPLO20
[2] A. Alexander et al. , “Update on the status of the C-band high
gradi... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA008.pdf | 2 |
aaeae99b-1e17-4f88-9658-c472c2449aa7 | DETAILED DESIGN STUDIES OF THE HIGH ENERGY BEAM
TRANSPORT LINE OF THE MINERVA PROJECT AT SCK CEN *
L. Perrot†, S. Chancé, Université Paris -Saclay, CNRS -IN2P3, IJCLab , Orsay, France
U. Dorda, L. De Keukeleere, J. Van de Walle , SCK CEN, Mol, Belgium
E. Traykov, E. Bouquerel, IPHC, CNRS -IN2P3, Strasbourg, Fran... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA011.pdf | 0 |
100606df-4eaa-4a94-b467-895c206f1b79 | with a focus on reliability. Attached to this 100 MeV linear
accelerator are a Proton Target Facility (PTF), which is es-
sentially a high power Isotope Separation On -Line (ISOL)
Facility, and a Full Power Facility (FPF) for fusion material
research. This paper presents the status of the beam optic
studies and ove... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA011.pdf | 0 |
9aae2821-3fda-41a1-9606-81fd81a8933d | perconduc ting spoke cavities [2]. To achieve a high relia-
bility for the ADS, the injector will be duplicated in the fi-
nal MYRRHA configuration and a fault tolerance strategy
will be elaborated for the superc onducting linac [3, 4].
TARGET FACILITIES
The High Energy Beam Transport (HEBT) lines deliver
the P... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA011.pdf | 0 |
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