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ca36adcb-bcf8-4284-93d1-8d76bfedd82b | dependance of 𝑆𝑥,𝑆𝑦and𝑆𝑧over element (length).
CONCLUSION
For EDM experiments it is necessary to use NICA as a
StorageRing. Forthisreasonmodernizationwasconsidered
by creation of an alternative straight sections parallel to the
nativeonesbyusingByPasschannels. Alsostraightsections
have the ability to place specia... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA072.pdf | 2 |
6078a981-0852-4d57-a1a5-a2e579af558d | REFERENCES
[1]E. Syresin et al., “NICA Ion Collider at JINR”, in Proc. Ru-
PAC2021 , Alushta, Russia, 2021.
doi:1/zero.alt4.18429/JACoW-RuPAC2/zero.alt421-MOY/zero.alt42
[2]D. Anastassopoulos et al., “AGS Proposal: Search for
a permanent electric dipole moment of the deuteron
nucleus at the 10−29𝑒⋅cm level” BNL, NY, U... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA072.pdf | 2 |
4bda8e8c-6481-417a-ac6c-42ddd62084bc | OPTIMIZING THE BEAM INTENSITY CONTROL BY COMPTON
BACK-SCATTERING IN e+/e-FUTURE CIRCULAR COLLIDER
I. Drebot∗, S. Cialdi2, INFN-Milano, Milan, Italy
A. Abramov, M. Hofer, F. Zimmermann, CERN, Geneva, Switzerland
2also at Università degli Studi, Milan, Italy
Abstract
Inthispaper,wepresentthepossibleuseoflaserCompton
back... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA074.pdf | 0 |
998c99bf-64fa-4b57-abf4-025653ae932f | INTRODUCTION
The future circular electron-positron collider FCC-ee
aimsto achievetightlycontrolled collidingbunches,where
themaximumchargeimbalancebetweencollisionpartner
bunches is less than 5%on the Z pole and less than 3%at
other collision energies [1 –4]. Maintaining this tolerance
iscrucial due tothe impactof beam... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA074.pdf | 0 |
2c1907f6-159d-48be-9296-463fddeb11b6 | tering (CBS) to achieve this. By leveraging CBS, we can
pre-adjust the intensity of colliding bunches to match the
needsofthecolliderbeforeeachbeamextractionfromthe
booster and top-up injection in the collider.
Moreover, CBS could be used to remove single bunch
pairs from the stored fill pattern in the collider as a la... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA074.pdf | 0 |
cf45bbd4-baf5-453d-b551-69be58e9dbc1 | ergy gain from electrons to photons can be expressed as
𝐸𝑚𝑎𝑥 𝑝ℎ𝑜𝑡≈ 4𝛾2𝐸𝑙𝑎𝑠. At a beam energy of 45.6GeV, this
corresponds to 𝐸𝑚𝑎𝑥 𝑝ℎ𝑜𝑡≈ 23GeV,andfor182.5GeV(𝑡𝑡)
∗illya.drebot@mi.infn.itcollisions, 𝐸𝑚𝑎𝑥 𝑝ℎ𝑜𝑡≈ 148GeVfor the FCC. This means
that in the first case, the electron or positron loses... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA074.pdf | 0 |
5eb4d8c5-9be7-4f1a-b40e-7d1a98299d5d | sions at waist.
The actual number of scattered particles and their energy
distribution in an experiment will depend on a variety of
factors,includingthebeamenergy,beamemittance,andthe
specific interaction process being studied. It is important
toperformrealisticMonteCarlosimulationstoaccurately
predicttheexperimental r... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA074.pdf | 0 |
8ad3fd6d-156a-4e98-b803-b76348344036 | 1kHz[10]. This laser system operates at a wavelength of
800nm, which is obtainable from a Ti:sapphire laser and
corresponds to a photon energy of 1.5eV.
Interaction Point
AsshownintheluminosityEq.(1),thenumberofscat-
teredparticlesisinverselyproportionaltothetransversespot
sizes of the collided bunches. Therefore, we s... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA074.pdf | 0 |
8a5e7910-344d-475f-aacb-cdc79ba452c8 | Figure1: Layoutof the collimation section under studyfor
the FCC-ee at the Z operation mode. The location of the
laserinteractionisindicatedbyblackbars,togetherwiththe
optics functions.
The beamsize at the laser interaction point together with the
beam parameters can be found in Tab. 1. The reasoning for
Table 1: Param... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA074.pdf | 1 |
feb93f1a-6d8e-4a21-9d9b-3c500c8cfd33 | thecollisionismaximizedatthehead-oncollision[13]. It
is also necessary to install mirrors and lenses outside the
electronorbit,atadistanceofatleast 3cm,fortheinputand
output of the laser pulse.
Tofocusthe laser pulse at IP wepropose simple scheme
using optical length and plain mirror as shown on Fig 2.
Usingtheproposed... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA074.pdf | 1 |
4c3d3c9a-416c-4c49-bf13-8f0416ffc980 | 100µmat the midpoint of the bending magnet at 𝑓 = 6m.
BEAM DYNAMICS SIMULATIONS
Tostudytheefficacywithwhichparticlescanberemoved,
as well as the loss location of scattered particles and the
emittance evolution, a number of tracking studies have been
performed. TheXSuitetrackingcode[14]hasbeenselected
fortrackinginthem... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA074.pdf | 1 |
9fb4af3a-6eba-453a-9b22-a5535506d4a2 | topreparetheGeant4modelsandinput. Afterscattering,the
primaryparticleandpotentialsecondaryparticlesarethen
handed back to the XSuite tracking code for further track-
ing. Inthetrackingstudies,thecollimatorsofthebetatron
and momentum collimation sections are included, as well
as masks to absorb synchrotron radiation ups... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA074.pdf | 1 |
559a02e3-f49b-46f4-aa4d-b2a67eef2d4c | whereas for the 𝑡𝑡operation mode, it is around 45turns. For
theseinitialstudies,basedonthelaserparametermentioned
above, the initial conservative assumption was made that
thebunchundergoeslaserinteractionevery3rdturn,corre-
spondingtoalaserfrequencyof 1kHzandassumingapulse
energy of 1J.
InFig.3,thefractionofsurviving... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA074.pdf | 1 |
03f62be0-69d3-490f-ad49-87030e0fd6fa | Figure3: Survivingfraction oftheinitialparticle bunchof
106particles for different laser spot size. The dashed line
indicatestheresultsforthe 𝑍operationmode,whereasthe
solid line is for tracking with 𝑡𝑡parameters.
Figure4: Single-bunchlossmapafter500turnswithlaser
interaction for the Z operation mode and a laser spo... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA074.pdf | 2 |
4656f2a5-c898-4d0f-8ea7-84a321613c69 | occur in the experimental insertions, where up to around
1.1J/misobservedatthedispersionpeaksatthestartofthe
insertions. The regions ±100 m from the collision points,
wheresensitiveequipmentliketheexperimentdetectorsand
superconductingfinalfocusquadrupolesarelocated,receive
up to an integrated total of 0.35J, correspon... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA074.pdf | 2 |
0b2ae595-5bd2-4872-a4f4-4ce03e192171 | a reference tracking without any Laser interaction. It is
Figure5: Emittanceevolutionoftheparticlebunchfordif-
ferent laser spot size and for the Z operation mode.
found that for the smallest spot size, the horizontal emit-
tance increases by about 5 % after 500 turns compared to
thereferencecase,bothinitializedwithemi... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA074.pdf | 2 |
9dc253c8-6f61-4025-947b-1e42fae88fbe | treatedasanaverageenergylossineachelement,ratherthan
the discrete emission of photons with the energy sampled
from the spectrum of the synchrotron radiation process. As
such, the horizontal emittance of tracked distribution will
tend towards 0 rather than the equilibrium emittance. While
moretime-consuming,futuretracki... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA074.pdf | 2 |
d771b692-6968-4f24-9de7-7b45dc0d5f01 | Theeffectivenessoftheproposedschemeisdemonstrated
andvariouscollisionparametersareproposedforsubsequent
use in more systematical studies of beam dynamics in the
FCC-ee ring.
Itis interestingto note that during the CBS,high-energy
photons are produced, with energy 23 GeV for the Z-
operation mode and 148 GeV for the 𝑡�... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA074.pdf | 2 |
b7814f4f-2706-4bdb-bab2-2c108c79f2c4 | REFERENCES
[1]F. Zimmermann and T.O. Raubenheimer, “Con-
trolling e�/e� Circular Collider Bunch Intensity
by Laser Compton Scattering”, in Proc. IPAC’22 ,
Bangkok, Thailand, Jun. 2022, pp. 1695–1698.
doi:1/zero.alt4.18429/JACoW-IPAC2/zero.alt422-WEPOST/zero.alt41/zero.alt4
[2]A. Abada, M. Abbrescia, S. S. AbdusSalam, e... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA074.pdf | 3 |
2e13aee8-9250-4d2c-aadd-d235ee1b0088 | JACoW-IPAC2/zero.alt418-MOPMF/zero.alt4/zero.alt41
[4]D.Shatilov,“Beam-beam effects at high energye+e−collid-
ers,” in 62nd ICFA Advanced Beam Dynamics Workshop on
High Luminosity Circular e+e− Colliders, 2019, TUYBA02,
doi:1/zero.alt4.18429/JACoW-eeFACT2/zero.alt418-TUYBA/zero.alt42
[5]D.Shatilov,“Howtoincreasethephys... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA074.pdf | 3 |
38ed2a7f-cad9-405a-8ea7-f20d27409941 | /zero.alt4167-5/zero.alt487(84)9/zero.alt4128-5
[7]D.Schroeder,“Lasers for plasma accelerators,” APS April
Meeting, 19 April 2021
[8]“Report of workshop on laser technology for k-bella and
beyond, (may 9-11, 2017); kbella workshop report,” 2017,
http://www2.lbl.gov/LBL-Programs/atap/Report_
Workshop_kBELLA_laser_tech_f... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA074.pdf | 3 |
e26a2708-f35a-431a-86d9-80144ac45b10 | land, Jun. 2022, pp. 1722–1725. doi:1/zero.alt4.18429/
JACoW-IPAC2/zero.alt422-WEPOST/zero.alt417
[12]K. Oide, “Collider Optics,” FCCIS 2022 Workshop (con-
tributed talk) , 2022.
[13]Drebot, I., Petrillo, V., and Serafini, L., “Two-colour X-
gamma ray inverse Compton back-scattering source”, EPL
(EurophysicsLetters),vo... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA074.pdf | 3 |
82dbcdb3-47b4-4a9c-90ac-ab748d268336 | Instrum. Meth. A 835 (2016) 186-225.
[19]L.J.Nevay etal., ”BDSIM:An AcceleratorTrackingCode
withParticle-MatterInteractions”, ComputerPhysicsCom-
munications 252 107200 (2020).
[20]A. Abramov, et al., “Studies of layout and cleaning perfor-
mance for the FCC-ee collimation system,” presented at
the 14th International P... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA074.pdf | 3 |
12186d8f-63db-441a-b901-7fcd47585e8c | MODERNIZATION OF TH E NSC KIPT HARD
X-RAY SOURCE FACILITY*
O. Cherkashyn, P. Gladkikh, I. M. Karrnaukhov, A. Mytsykov, V . Grevtstev, A. Zelinsky
NSC KIPT, Kharkiv, Ukraine
Abstract
To satisfy up-to-date technical requirements NSC KIPT
hard X-ray source on the base of Compton scattering NES-
TOR should be modifie... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA075.pdf | 0 |
c2b74326-80a7-4beb-ad4d-6f49926489c8 | and optical cavity. During the last few years the detail tests of
the NESTOR accelerating systems were carried out [2, 3].
The test results showed to provide the proper electron
beam storage and X-rays flux generation value of about 10
12
phot/s the essential facility modernization should be done.
LINEAR ACCELERA... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA075.pdf | 0 |
ca4e676d-3e83-4ab0-9ad3-abc18f182b0a | frequency is 2797 MHz.
Operation showed some disadvantages of this accelera-
tor associated with used of accelerator injector hardware
and long sections without additional beam focusing. In ad-
dition, the use of 2797 MHz operation frequency makes it
difficult to purchase components of the RF system with such a fre... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA075.pdf | 0 |
41fc4cf6-068d-4cb2-9ed1-117b1fed9818 | same kind of injector when upgrading the accelerator.
Another possibility is use of F102414 triode electron gun by
ALTAIR with 20-30 kV high voltage and 1 A beam current
along with accelerating section of 20 Mev electron beam energy.
The injection energy into the NESTOR storage ring was
chosen to be 60 MeV , wh... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA075.pdf | 0 |
61488d6c-ac0b-4753-a9a9-e95caa012c75 | about 15 MeV electron energy gain in each section.
More flexible and less expensive accelerator layout
based on recirculator with two accelerating sections is pre-
sented in Fig. 1. Such a scheme provides intense electron beam with energy up to 90 MeV .
STORAGE RING MODERNIZATION
The NESTOR storage ring lattice was... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA075.pdf | 0 |
12249cc2-658f-41f3-a001-b8b27d19df8a | losses due to synchrotron radiation. Because of such a high intensity of the Compton beam, the calculated energy
spread of the electron beam would reach about 1.5%,
which required the storage ring lattice with a large energy separatrix. For its implementation, a lattice with an adjust-
able momentum compaction factor... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA075.pdf | 0 |
f784e282-4d3e-45a3-9b52-216c1f0928b1 | would be expedient to weaken the requirements for the
beam separatrix and symmetrize the ring lattice.
The NESTOR storage ring circumference is equal to
C = 15.418 m, harmonics number is h = 36 under RF fre-
quency of fRF = 2797 MHz. The simplest option for up-
grading the ring with minimal alterations when switchin... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA075.pdf | 0 |
78651a43-26fb-4d46-bfa7-e5df0a425107 | Figure 1: Modernised accelerator layout based on recirculator.
To match the ring perimeter with new RF frequency it is
needed to enlarge the ring circumference of about 12 cm. It may
be performed by the lengthening of both ring long straight sec-tions by 6 cm. The injection path of the ring remains unchanged.
The r... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA075.pdf | 1 |
557a22b1-2121-4d41-8c7f-42c193d56249 | functions over single superperiod are shown in Fig. 3.
Table 1 shows the comparative parameters of the lattices
described above.
Figure 3: Amplitude functions of single superperiod of lat-
tice with RF harmonics number h = 36.
Table 1: The main rings parameters
Paramete
r
NESTOR Lattice with
h=37 Lattice
... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA075.pdf | 1 |
e23653c7-089a-4098-91ff-fdee49480172 | Figure 4: Dynamic apertures of the NESTOR (left) and storage ring with RF harmonics number h = 36.
Comparison of the dynamic apertures of the NESTOR
storage ring and symmetrized ring with momentum com-paction factor α = 0.08 (h = 36) is presented in Fig. 4.
The final choice of the upgrade option for the NESTOR
ha... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA075.pdf | 2 |
60b12ca3-3b8b-4561-b569-0ebcabc90369 | without essential construction and engineering efforts.
REFERENCES
[1] E. Bulyak et al., “Compact X-ray Source Based on Compton
Backscattering,” Nucl. Instrum. Methods A , vol. 487,
pp. 241–248, 2002. [2] V . Androsov et al., “The start of X-ray generator NESTOR
commissioning ,” Problems of Atomic Science and Tec... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA075.pdf | 2 |
ea8d47c7-ab63-490f-8acf-9059293d41ca | of the technological source of synchrotron radiation,” Prob-
lems of Atomic Science and Technology , no. 5, pp. 3-10,
1989.
[6] S. Pei et al., “Beam dynamics studi es on the 100MeV/100kW
electron linear accelerator fo r NSC KIPT Neutron source,”
Chinese Physics C , vol. 36, no. 7 pp. 653-660, Sep. 2011. | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA075.pdf | 2 |
78caf901-4f2d-4910-b063-58cb2a408a0f | MODERNIZATION OF THE LASER-OPTICAL SYSTEM
OF THE X-RAY GENERATOR NESTOR*
O. Cherkashyn, A. Zelinsky†, National Science Centre,
Kharkiv Institute of Physics and Technology, Kharkiv, Ukraine
Modernization of the accelera ting ring of the NESTOR
hard X-ray generator for switching to the operating
frequency of the ... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA076.pdf | 0 |
bf858141-6e4c-4259-8833-0f4e2a4e09de | using an already existing LOS at a new operating
frequency of the accelerator w ith some changes in the
design.
INTRODUCTION
The development of a highly efficient X-ray source
based on Compton backscattering requires the presence of short electron and photon bunches that have a small cross
section and a sufficie... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA076.pdf | 0 |
4bac27cd-6044-4b2e-9747-857229464aea | X-RAY GENERATOR NESTOR
The structural block diagram of the LOS of the NESTOR
generator is shown in Fig. 1. As a powerful pulsed laser, it is planned to use a PICOLASER 10 IR series laser from
the German company ALPHALAS. It has an average
output power of 10 W, at a wavelength of λ=1064 nm. The
duration of the gene... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA076.pdf | 0 |
1f21e37c-f51e-4469-a28f-99d6136e5f22 | Figure 2 shows a 3D model of the optical cavity for a
laser beam of X-ray source NESTOR.
The main optical elements of the NESTOR LOS are
described in Table 1. Such an LOS with a phase-locked
loop can provide photonic bunches that meet the required conditions for obtaining of the high-intensity X-rays. Table 1: The ... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA076.pdf | 0 |
b9c7bf41-e8fe-4607-9d8d-2f9200a32df6 | 7 Polarizing
plate λ/2 Zero-order quartz wave
Plate, 25.4 mm, 1064 nm, λ/2
8 Polarizing
plate λ/4 Zero-order quartz wave
Plate, 25.4 mm, 1064 nm, λ/4
9 Mirrors for an
optical resonator UVFS plano-concave mirror,
R
M = 215 mm,
During the works on the physical start-up of the
NESTOR source, it became necessary... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA076.pdf | 0 |
d9d6424e-341f-4747-a283-8780dd41f7be | and storage ring RF-frequency. Unfortunately, the laser
pulse repetition frequency tuning, which was provided by
the manufacturer, does not co ver the required range from
frep0 = 350 MHz to frep = 357 MHz, and we will have to turn to ALPHALAS to upgrade the laser.
_____________________________________________ ... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA076.pdf | 0 |
1aecc849-5602-4119-a20d-0815c48c20cc | Figure 1: The structure of the LOS of the NESTOR generator.
Figure 2: 3D model of the optical resonator for a laser
beam x-ray source NESTOR.
Another element of the LOS that needs to be changed is
a two-mirror optical cavity. Its length is directly related to
the repetition rate of laser pulses
/2repfc L= (1) ... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA076.pdf | 1 |
a30cdf33-433c-43c5-9cfd-6998aec018a7 | the beam waist size in the resonator will increase from
60 µm to about 105 µm, so we suppose to reduce the RM to 210 mm. In these conditions the beam waist will be
approximately 40 µm. CONCLUSION
The article describes possible alterations of the LOS of
the NESTOR X-Ray source cau sed by the modernization
of the st... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA076.pdf | 1 |
97ca5620-cb42-4836-b316-d1375afd2385 | vol. 487, no. 3, pp. 241-248, Jul. 2002.
doi:10.1016/s0168-9002(02)00904-x
[2] F. V. Hartemann et al ., “Compton scattering and its
applications: The Pleiades femtosec ond X-Ray source at
LLNL,” World Sci: Quantum Aspects of Beam Physics , Oct.
2004. doi:10.1142/9789812702333_0005
[3] A. Variola et al ., “The... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA076.pdf | 1 |
b0b7b611-e15b-4df0-8614-0085d7b48708 | [6] H. Shimizu, A. Aryshev, Y. Higashi, Y. Honda, and J.
Urakawa, “Development of a 4-mirror optical cavity for an inverse Compton scattering experiment in the STF,” Nucl.
Instrum. Methods Phys. Res., Sect. A , vol. 745, pp. 63-72,
May 2014.
doi:10.1016/j.nima.2014.01.055 [7] J. Bonis et al., “Non-planar four-mir... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA076.pdf | 2 |
8453fa49-2cb1-4681-901b-d11e91f69ea3 | NUMERICAL ANALYSIS ON THE AIR CONDITIONING SYSTEM OF THE
EXPERIMENTAL HALL AT TPS
J.-C. Chang †, and W.-S. Chan
National Synchrotron Radiation R esearch C enter , Hsinchu, Taiwan
Abstract
Taiwan Photon Source (TPS) had delivered the first syn-
chrotron light on the last day of 2014 . Installation of 16
beaml... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA077.pdf | 0 |
4db191a2-6623-416d-99b0-04e6d4112532 | INTRODUCTION
The air conditioning system plays a critical role in a sta-
ble operation of precision experimental facilities. Stable temperature and humidity are not only conducive to the ex-
periment conducting, but provides a comfortable environ-ment for experi menters. On the other hand , nowadays more
people care... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA077.pdf | 0 |
0e861009-f102-43ec-90ac-3850c8f592f7 | of numeric al analysis and computer science, CFD has the
advantage of reduction of time and cost . We had perform ed
the CFD to simulate the temperature and flow field of the
storage ring of Taiwan Light Source [2].
NUMERICAL SIMULATION
In this study, we performed CFD of 3D steady state nu-
merical simulatio... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA077.pdf | 0 |
04d3e784-48ac-49fe-916d-3cd5e2ab3146 | tunnel with wedge wall is located. Area C, the outer ring,
is where beam -lines are located . In this study, we generate
three virtual planes I, II and III to exam the simulation re-sults. Plane I vertically and radially span areas A, B and C
passing through eight air exits . Plane II vertically spans ar-
eas B a... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA077.pdf | 0 |
53477705-2ab5-408c-a858-469e4bbb4a62 | Mass conservation equation (continuity equation)
( ) 0= ⋅ ∇ +∂∂uρρ
t (1)
where ρ is density of fluid (air in the study) , t is time and
u refers to air velocity vector.
Momentum conservation equation
( )t ptτ µ ρ ρρ⋅ ∇ − ∇ ⋅ ∇ + + −∇= ⋅ ∇ +∂∂) () (u g uuu
(2)
where p is pressure, g i... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA077.pdf | 0 |
5a55856f-d20b-4a7d-bbf0-b1e897cc60f4 | this space is 10.7 m. The volume of the simulation zone is
about 12,313 m3.
In this model, the air exits and exhausts are respectively
located on the ceiling and area C, the outer ring. The lights ,
and air exits are distributed on the ceiling .
According to the geometry of the model, we applied hy-
brid grid t... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA077.pdf | 1 |
3a555b9b-7677-465e-8245-c7dc546c807a | ing. The air exit temperature is 20 oC. Air exhausts are set
as outflow.
Heat flux of s ome heat sources such as daylight win-
dows, lights, cable trays, ceiling, hutc h walls, panels, and
PC screens are set between 60 W/m2 to 30 W/m2.
RESULTS AND DISCUSSION
Figure 3 shows the air velocity (m/s) vectors on ... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA077.pdf | 1 |
bb7c9958-65b4-4211-ab49-6c40138f3635 | its on the ceiling is 20 oC. Air temperature variation with
distance from air exits is clear. The steady state simulation
results show the temperature near the daylight windows is
about 22 or 23 oC. Heat flux from ceiling may be obs erved. For better resolution, the upper temperature limit is set
at 25 oC. In thi... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA077.pdf | 1 |
98530c0f-59c0-4a4c-8bf8-ef0f8d0c6fbc | through air exits on the ceiling and most heat sources are
near ground, cold air is in the upper zo ne, as shown in both
Figures 4 and 5.
Figure 5: Contours of temperature on the Plane II .
Figure 6 shows s imulated path lines on the Plane II of
Case 1. Path lines are virtual massless particles released
f... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA077.pdf | 1 |
ae09d3fd-14d7-42ac-80b4-fc12a3f0c744 | Figure 7 shows contours of temperature on the Plane III .
It is clear that air temperature near beamlines is higher than
other area. Especially in the area between two beamlines.
On the other hand, there are few heat sources and the cold
air from air exits flows to air exhausts in the left area, the
temperature... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA077.pdf | 2 |
e50b29de-c456-40d3-8748-72ec843cdc8a | Figure 8: Contours of temperature on the Planes I with air
exit velocity is set 10 m/s .
Figure 9 showing contours of temperature on the Planes
II with air exit velocity is set 10 m/s . Likewise, this figure
is similar to Figure 5. Although high air exit velocity can
enhance air conditioning effect, the fan o... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA077.pdf | 2 |
4f967734-c53d-4c1b-843d-5949aa68c351 | creases. Temperature gradient near two beam lines is
clearer.
We also collect the actual temperature in the experi-
mental hall. The collected temperature is higher about 2 oC
than the simulated results on the Plane III. Some heat sources, such as some equipm ent and personnel. Besides,
will try to modify the air ... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA077.pdf | 2 |
f4fe426b-897c-4477-ae7a-1e98017f8a87 | The simulated temperature is lower than actual collected
results. The simulated temperature variation at different lo-cation still helps us to improve our air conditioning system.
ACKNOWLEDGEMENT
Authors would like to thank colleagues in the civil and
utility and group of NSRRC for their assistance .
REFERENCES... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA077.pdf | 2 |
92a54762-2e89-4d71-9c0d-fb89450f8d0b | sipation model of turbulence to the c alculati on of flow near a
spinning disc”, Letters in Heat and Mass Transfer, vol. 1, no.
2, pp. 131-138, Nov. 1974 .
doi:10.1016/0094- 4548(74)90150- 7 | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA077.pdf | 2 |
83500708-7e64-4435-894d-408a898b76c2 | DESIGN STATUS OF RF SYSTEM
FOR THE KOREA 4th GENERATION STORAGE RING
Bong Hyuk Choi†, Mujin Lee, Youngdo Joo, Insoo Park, Yongseok Lee, Sehwan Park,
Junghoon Kim, Myung-Hwan Chun, Inha Yu, Pohang Accel erator Laboratory, Pohang, South Korea
Yonguk Sohn, Korea Basic Science Institute, Daejeon, South Korea
Abstrac... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA078.pdf | 0 |
0b894b39-4396-4489-8d61-a80c059a6ca0 | PLS-II which is the 3rd generation light source in Korea. The RF system for the Korea 4GSR consists of 10 or more
normal conducting cavities, a low-level RF(LLRF) system,
a high-power RF(HPRF) system and so on. Additionally, we are planning to install harmonic cavities for Landau
damping, on the other hand for impro... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA078.pdf | 0 |
29c5bc8d-f791-4532-822f-f49d4d79c0f7 | Ochang, Chungcheongbuk-do, about 100 km away from
Seoul, with a total area of 540,000 m
2.
Table 1 shows the Korea 4GSR main parameters, with
the target emittance being calculated at 62 pm-rad. The in-itial construction will involve 10 beamlines, with plans to
construct 40 or more beamlines ultimately. The injector... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA078.pdf | 0 |
c1468b2c-dcef-47ff-afa2-e58d01e3953e | lattice of the storage ring will be designed using the Hybrid
7 Bend Achromat(H7BA).
BOOSTER RING RF SYSTEM
Table 2 shows the Booster RF system parameters. The
beam current for the single-bunch mode in the booster is 2
mA, and the RF frequency is 499.594 MHz. The injection energy is 200 MeV , and the extraction en... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA078.pdf | 0 |
95b8f876-5d8f-4f08-9de1-d7782ae2ecbd | Energy loss per turn [MeV]
(only Bending) 1.097
Beam Current [mA] 400
Bunch length( 𝛔s) [mm] 4.058 / 16.232
(with 3rd harmonic
cavity)
Number of Beamline 25(ID)
28(2 T Bend)
To apply this acceleration voltage, various types of cav-
ities were compared, and the 5-cell PETRA type cavity [1], which is advantag... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA078.pdf | 0 |
a382ea34-416e-45be-8b5b-35e79c4e6c04 | to manufacture a stand-alone LLRF system based on
RFSoC.
To supply 34.41 kW at the coupler, the high-power RF
power amplifier (HPRF) is selected 80 kW Solid State
Power Amplifier (SSPA), considering approximately 6% waveguide and circulator power losses. The operation of
the SSPA is based on operating the SSPA at ... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA078.pdf | 0 |
6e5ff24c-14e6-4560-a347-1fee61a7ce45 | Table 2: Booster Ring RF Parameters
Parameters Value
Beam Current [mA] 2
RF Frequency [MHz] 499.594
Energy [GeV] 0.2 – 4.0 Turn by Energy loss [MeV] 1.57
Accelerating V oltage [MV] 3.0
Number of cavities 3 Coupling beta ~ 1.10
Required power to coupler per
cavity [kW] 34.41
Rated power of HPRF / unit [kW] 80 ... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA078.pdf | 1 |
84bdc62f-22e6-423b-b0ef-e999b13e3b93 | cavity was selected instead of superconducting cavity to
minimize downtime due to unstable operation and repairs, with the EU-HOM damped type [2] being considered as it
has been verified for HOM removal.
Table 4: Storage Ring RF Parameters
To meet the required accelerating voltage, at least 10
EU-HOM damped cav... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA078.pdf | 1 |
aab368de-011d-4fc5-9979-c9b8e5bbcbdf | Figure 2 shows the master oscillator and distribution sys-
tem. The green, blue and red boxes are master oscillator,
distribution amplifier and low drift and jitter optical RF
signal transfer systems, respectiv ely. The plan is to install
the master oscillator in the main RF building control room and distribute it t... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA078.pdf | 1 |
cb3999a4-3cfc-4dcd-876e-ee85d5374484 | Beam Current [mA] 400
RF Frequency [MHz] 499.594 Turn by Total Energy loss
[MeV] (Bending, ID, others) 1.88
Accelerating V oltage [MV] 3.5
Number of cavities 10
Optimal Coupling beta 4.5
Required power to coupler
per cavity [kW] 98.57
Rated power of HPRF / unit
[kW] 150
Parameters Value
RF Frequency [MHz] 4... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA078.pdf | 1 |
0467f9ff-d9a6-4b7e-ac16-0af6c44d28f2 | Figure 2: Master Oscillator and Distribution system
Table 6 shows the required RF power calculated assum-
ing 10 EU-HOM cavities are used. 98.57 kW is required at
the coupler and taking into account approximately 10%
waveguide and circulator losses, 108.57 kW is required at
the output of the SSPA. Assuming the SSP... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA078.pdf | 2 |
d33c7003-3cae-47a4-8aba-f60aacb9309d | specifications for the RF system components being final-
ized in order to complete the project by 2027. Once the
specifications are confirmed, prototypes of the RF devices
will be produced and their performance will be verified to test their suitability for the Korea 4GSR project. The pro-
duction of the final produc... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA078.pdf | 2 |
4b9f5258-5ae3-4958-b7db-1f2daea54b82 | ALBA Booster: Commissioning and Operation”, in Proc.
IPAC'10 , Kyoto, Japan, May 201 0, paper WEPEA057, pp.
2615-2617.
[2] E. Weihreter, “Status of the European HOM Damped Nor-
mal Conducting Cavity”, in Proc. EPAC'08 , Genoa, Italy,
Jun. 2008, paper THXM03, pp. 2932-2936.
Parameters Value
Required accelerating ... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA078.pdf | 2 |
55faa603-0cc9-43da-a6f4-68b5279553fa | Output Power
Stability 0.5 % Vp-p
Phase Varia-
tion by power 3° / dB
Phase Stability 0.5° @ rated power
Efficiency > 50 % @ P1dB Input/output Z 50 𝛀
Harmonics < -36 dBc Spurious < -70 dBc
RF Ports In : N-type / Out : WR1800 VSWR < 2 | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA078.pdf | 2 |
ab301574-cb37-47c0-b373-f8a2fcc5db94 | PRELIMINARY DESIGN OF CONTROL SYSTEM FOR
STORAGE RING RF IN KOREA 4GSR*
Mujin Lee†, Youngdo Joo, Insoo Park, Bonghyek Choi, Sehwan Park
Youngseok Lee, Junghoon Kim
Pohang Accelerator Laboratory, POSTECH, Pohang 37673, Korea
Yonguk Sohn, Korea Basic Science In stitute, Daejeon 34133, South Korea
Abstract
The co... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA079.pdf | 0 |
3a203fe6-8b23-4781-9875-6d369718dd51 | based on synchrotron light source was decided and started
on 2020 shown in Fig. 1. The machine target parameters are 4-GeV beam energy, 400 mA beam current and less
than 100-pm-rad emittance with so-called 4GSR character-
istics [1, 2]. The evaluated brilliance and coherence are ap-proximately 100 times higher in th... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA079.pdf | 0 |
e3edb2f3-1b93-401d-97c9-3b8aa0b2a45d | placed between the booster-ring and the storage-ring for the injection of electron bunches [1].
Figure 2: Layout of the Storage-ring in the Korea-
4GSR [1].
The capability, availability and reliability of photon
beam are immediately affected by the RF system of the
storage-ring. The preliminary RF parameters for... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA079.pdf | 0 |
1896d5c9-2d84-4c1d-b399-748cdc6e26e5 | Energy GeV 4.0
Current mA 400
Circumference M 798.84
Revolution frequency MHz 3.7528
Harmonic number - 1332
Electron energy loss/turn by
bending magnets and IDs KeV 1850.1
Total beam loss power kW 740.01
RF frequency MHz 499.8773
Accelerating voltage MV 3.5
___________________________________________
* T... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA079.pdf | 0 |
b84ed0c8-db3f-4ea5-9f33-784b720ed449 | For the beam stability with 400 mA beam current and
100 pm-rad emittance, a HOM damped cavity would be in-
dispensable for the storage ring . The SRRF is composed of
10 RF stations to support accelerating voltage of 3.5 MV for the optimal bucket height and sufficient RF power.
Each RF station includes LLRF (Low Leve... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA079.pdf | 1 |
51d70cee-8843-4b9f-a0d8-308296814d48 | system maintains amplitude and phase of the accelerating
field within 0.1% and 0.1 degree respectively. Each cavity
assembly consists of a norm al conducting cavity, vacuum
devices, temperature measuring devices, cavity-cooling system. A cavity bears HOM damper, power coupler and
frequency tuner.
In this paper, w... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA079.pdf | 1 |
ed95eedf-d210-475e-933a-d6326b4f7d17 | support EPICS IOC service is needed in each RF
subsystem to support the protocol and connect a local network and the control network. Each EPICS IOC will
support their own RF subsystem. The control system
additionally includes the interlock system, the post-mortem which is for the fault diagnosis during beam operati... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA079.pdf | 1 |
28f8661c-cd34-4267-b81d-eb20e9c0bbd2 | every failures. The interlock signal connection among subsystems of the SRRF is shown in Fig. 6. The post-
mortem is to get snap shot data of primary RF parameters
at fault events for diagnostics. So only the critical signals such as beam current, amplitude, phase, vacuum pressure
and arc detection will be handled. ... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA079.pdf | 1 |
5eb864ee-ac64-4d3a-8219-4a0ed483b312 | controller will cut forcely RF power providing to cavities,
when the external interlock signals (Machine Protection
Interlock, Personnel Safety Interlock, Beam Position
Interlock) are on. The local interlock controller gathers the status signals from each RF components and produces
“ready” or “non-ready” signals. A... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA079.pdf | 2 |
78185526-8014-43a1-99b1-2b94a4aab89e | SRRF. 10 for fundamental cavities and 6 for harmonic cavities.
Monitoring signals from RF stations and the interlock
system are recorded by the post-mortem at abnormal beam
event. The usual recorded data is stored automatically on
the network storage server with the event. Additionally the primary parameters of dia... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA079.pdf | 2 |
d9591d6d-cf39-45f4-8afa-1ed9c59177fb | SRRF. 10 for fundamental cavities and 6 for harmonic cavities.
Additional signals of the SRRF without EPICS PV are
measured and digitized as EPICS PV by the DAQ system
as shown in Fig. 9. For the fast acquisition, more than
200kS/s sampling rate is required on each input channel of the DAQ system.
The EPICS PV da... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA079.pdf | 2 |
dda433f0-0695-44b9-a845-91be0aadfcbd | Figure 9: Connection diagram of the DAQ System and the
Archiving System for the SRRF.
CONCLUSION
The Korea-4GSR target parameters are 4-GeV beam
energy, 400 mA beam current and less than 100 pm-rad emittance. For the beam stability with 400-mA beam
current and less than 100 pm-rad emittance, a HOM
damped cavity w... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA079.pdf | 2 |
1e0e68b2-8e9b-4a00-9895-1e3dbc1c0a46 | archiving system are includ ed in the control system.
The RF test facility will be prepared at the PAL site until
October 2023 to verify basic performance of LLRF, HPRF,
cavity and instruments to be applied to the Korea-4GSR. The prototype of control system will be implemented and
tested at the facility. The proto... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA079.pdf | 2 |
b74288a6-6fc4-4ac2-8f34-63b24371983f | PARTICLE ACCELERATORS TO MEET GRAVITATIONAL WAVES
S. P. Petracca∗, University of Sannio at Benevento and INFN
I. M. Pinto†, University of Naples Federico II and INFN
Abstract
TheobservationoftheHiggsbosonbytheLHC(2012),
and the direct detection of gravitational waves from a co-
alescing binary system by LIGO (2015) mar... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA080.pdf | 0 |
745f1e28-7528-4b29-ba98-618bb5f0c4fb | of relevant ideas and references.
GW SPECTRAL COVERAGE
The two US LIGOs [4] the EU Virgo [5] and the (cryo-
genic, underground) japanese KAGRA [6] are the four legs
of the LIGO-Virgo-Kagra (LVK) Observatory, featuring (al-
beit limited) direction-of-arrival and source-reconstruction
capabilities. AdditionofaLIGO-clonei... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA080.pdf | 0 |
23327f22-35a6-4663-83a0-0124b9d463ee | Observing lower frequency GWs will be possible with
the advent of LISA [14], a large scale ( 2.5·106km arm-
length) space-borne interferometric detector, planned for
launch in 2037, following the remarkable success of its
pathfinder mission [15]. A comparable chinese project [16],
and a smaller-scale (three drag-free s... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA080.pdf | 0 |
688f1743-97a8-4db7-b3a7-efffb0bb795f | †LIGO-Virgo-KAGRA Collaboration, Optica (OSA) Fellow
1Smallerscaleinterferometersarecurrentlyusedastechnologytestbeds,
including GEO-600 [8], TAMA-300 [9], CLIO [10], and the Caltech-
40m [11].
Figure1: GWspectralcoverageofmainstreamGWdetec-
tors: expected source bands and strain spectral densities
(credit L.H. Park).
... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA080.pdf | 0 |
2acf4a76-aaf7-4f1a-844b-150dd68462d0 | independent shrinkage in SR circumference [31], perhaps
already observed [32], has been reconsidered.
Revisedestimatesofgravitationalsynchrotronradiation
[33],bothdirect(at 𝜔𝑐𝑖𝑟𝑐),andindirect(byGershtensteyn
conversionofEMsynchrotronradiation,at 𝛾3𝜔𝑐𝑖𝑟𝑐),have
been presented [34,35]; detectability has been di... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA080.pdf | 0 |
46f24293-6398-4361-9653-94206024dbee | newperspectiveinhadronic/nuclearcross-sectionsmeasure-
ments [42].
HF GW SOURCES/DETECTORS
Potential HF GW sources2are being actively investigated
(Fig.2). See Ref. [44] for a recent review. The related
estimates, however, are still very speculative.
2Itwouldbegood,toavoidmisunderstandings,tousethe HFshorthand
in compl... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA080.pdf | 0 |
c1a69564-f7b9-4514-9628-f8eedca3993d | Figure 2: Left: Axion mass, coupling, and photon-frequency (Primakoff-conversion). The grey zone corresponds to active
experiments;thediagonalbandtopossibleQCD(Peccei-Quinn)generationmechanisms(credit: F.Paolucci&F.Giazotto).
Right: extrapolated GW strain sensitivity of some axion experiments (credit: A. Berlin et al.)... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA080.pdf | 1 |
1cde232f-d315-4887-8d02-ca432268b4a7 | struments with 40 m arm-length, originally designed to
probe quantum-geometrical fluctuations of spacetime [48],
has been used to set an upper limit on the stochastic GW
energydensityinthe1-10MHzband[49],andtoruleout
the existence of multi-harmonic sources (eccentric binaries
and string loops) above a GW-strain level ∼... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA080.pdf | 1 |
46855ec9-14db-4f22-be8b-4c4b4504d0d6 | the GW frequency, different gauges may provide handier
descriptions of these interactions [56]). In particular both
HF-GW[57 –59]andLF-GWdetectors[60,61](Fig.3)have
beenstudiedandprototyped[62 –64],andarelikelyworth
further work, in view of advances in key technologies.
HF GW Detectors: ALP Experiments
Remarkably,exper... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA080.pdf | 1 |
8f5a2ed0-cac2-4403-a09d-a7f4fa0c2962 | quency bands(2.7to14)·1014Hzand(5to12)·1018Hz,
have been already obtained from data gathered by axion
experiments [69].
HF GW Detectors: Other
Two other promising (relatively) new ideas for HF-GW
detectors, based respectively on optically levitated micro-
spheres/disks, and on HF phonon trapping in bulk-acoustic
resona... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA080.pdf | 1 |
b36e7272-cc66-4a07-924c-31d2188ae30a | Twentyyearslater,RayW.Chiaosuggestedthatsupercon-
ductors may act as GW mirrors, as an effect of WEP vi-
olation by Cooper-pairs [74]. Albeit still controversial –
seeRef. [75]for adiscussionand analternativederivation
– Chiao’s claim, if experimentally confirmed, could be a
game-changer [76]. | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA080.pdf | 1 |
55885b20-cd94-40ae-8f00-3fed16c58415 | Figure 4: Left: Loaded 𝑄of different SC RF cavities vs applied magnetic field w. increasing/decreasing amplitude (credit
S. Posen et al.). Right: SEM image of superconducting-nanowire single-photon detector (credit K. Ilin).
CRITICAL TECHNOLOGIES
Advances in the following areas, at the intersection be-
tween the PA an... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA080.pdf | 2 |
5e3ae4a4-dc95-4159-9daa-e1c6abadfa4a | •Large Magnetic Fields – steady operation of hybrid
(SC/resistive) DC magnets at 𝐵∼45T has been
achieved [82]; pulsed (15 msec fields ∼100 T are now
routinely generated [83]. Localized giant (∼103𝑇)
pulsed fields (via magnetically-driven implosion) have
been demonstrated [84].
CONCLUSIONS
We believe that enhanced int... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA080.pdf | 2 |
e9ccec88-3de9-4652-9cb5-33c11ef775db | 074001, 2015, doi:10.1088/0264-9381/32/7/074001 .
[5]F.Acernese et al.,"AdvancedVirgo: a2ndGenerationGWDetector,"
Class. Quantum Grav. , vol. 32, p. 024001, 2015, doi:10.1088/0264-
9381/32/2/024001 .[6]T.Akutsu et al.,"OverviewofKAGRA:DetectorDesignandCon-
struction History," Prog. Theor. Exp. Phys. , vol. 2021, p. 05A... | d:\Daily_ihep\Weekly Progress Report\20260425\41_IPAC'23\MOPA - Monday Poster Session_ MOPA\MOPA080.pdf | 2 |
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