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7e25ab8e-242d-479e-a7d8-6064a7f6ef42 | pp. 217–221.
doi:1/zero.alt4.18429/JACoW-NAPAC2/zero.alt425-MOP/zero.alt47317th International Particle Accelerator Conference, Deauville, France JACoW Publishing
ISBN: 978-3-95450-252-3 ISSN: 2673-5350 doi: 10.18429/JACoW-IPAC2026-WEP6172
2930 MC6.T03: Beam Diagnostics and InstrumentationWEP6172 WEP: Poster session
Con... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6172.pdf | 3 |
60aec504-1ed1-4a1f-87d6-33821b1e5a52 | EFFICIENT FIVE-DIMENSIONAL BEAM SIGMA MATRIX
DETERMINATION USING DIFFERENTIABLE SIMULATION∗
C. Xu†1, M. Borland1, L. Emery1, O. Mohsen1, Y. Sun1, K. P. Wootton1, R. Roussel2
1Argonne National Laboratory, Lemont, IL, USA
2SLAC National Accelerator Laboratory, Menlo Park, CA, USA
Abstract
Precisereconstructionofthebeamsi... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6303.pdf | 0 |
3218371b-ad1a-4fc5-8a08-550555c9d62a | configurations. The differentiable-tracking approach yields
physicallyconsistentreconstructions while remaining com-
putationallyscalable. Thesedevelopmentsforma practical
frameworkforsigma-matrixdeterminationincomplextrans-
portlinesandsupportfuturereal-timemodelcalibrationand
tuning at the APS and similar facilities.... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6303.pdf | 0 |
4505833b-6b58-49c4-9098-a508e19c97f3 | sigma matrix using first-order transport matrices [ 1,2]. De-
spiteitsefficiencyandtransparency,thisapproach’saccuracy
degrades when the transport line cannot be represented well
byafirst-ordermodel. Strongchromaticeffects,nonlinear
fields, and lattice-model errors can produce discrepancies
between the measured moments... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6303.pdf | 0 |
e56c1758-73c3-45db-9dd1-865abbfe4f3a | tracking calculations. This capability has enabled gradient-
basedhigh-dimensionalbeamreconstruction,including gen-
erative phase space reconstruction (GPSR) methods for six-
dimensional phase-space recovery [ 7,8]. In our previous
∗The workis supported bythe U.S.DOE Office of Science-Basic Energy
Sciences,under Contra... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6303.pdf | 0 |
9b29d973-b1f1-4755-9d7c-9a0bf944c0c4 | ciencyandrobustness. Weformulatethesigma-matrixre-
construction directly in terms of a differentiable, physically
constrained covariance parameterization. The method is
generalized to include measurements from multiple screens,
whichaddsindependentconstraintstoimprovetherobust-
ness and reduce the data requirements of ... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6303.pdf | 0 |
f2df5766-cdf5-456d-919d-5c184428a507 | Sigma matrixΣ 5×5(θ)
X∼ N(0,Σ θ)Parametrized Distribution Phase-space Coordinates Simulated Lattice
Measured Predicted
L(Y target, Ypred(θ))
Mean-squared errorLoss CalculationSample
Particles Track
Screen Images
i∈1, . . . , N
Y=
σxx
σyy
σxy
Gradient descent
θk+1←θ k−η∇ θL
xyQ1Q2Q3Screens
···
Y(i)
pred
Y(i)
target... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6303.pdf | 0 |
0c077c6a-f97e-46f0-ac2b-9bd27b129149 | ISBN: 978-3-95450-252-3 ISSN: 2673-5350 doi: 10.18429/JACoW-IPAC2026-WEP6303
MC6.T33: Online Modelling and Software Tools 2931WEP: Poster session WEP6303
Content from this work may be used under the terms of the CC BY 4.0 licence (© 2026). Any distribution of this work must maintain attribution to the author(s), title ... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6303.pdf | 0 |
97b57300-b660-418f-865d-b6eac8f95e87 | a softplus transform,
(𝐿𝜽)𝑗𝑗=log(1+exp(𝜃𝑗𝑗,raw)), (2)
while the off-diagonal elements are used directly as opti-
mizationvariables. Thisparameterizationensuresthatthe
resulting covariance matrix is positive definite without re-
quiring additional constraints in the gradient optimizer.
Foreachoptimizerstep,afixed... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6303.pdf | 1 |
bafc9950-9987-4c55-a20b-1428e6be6fb8 | 𝒀(𝑖,𝑠)(𝜽) = 𝑓𝑠(𝑿in(𝜽) ∣ 𝒌𝑄,𝑖), (5)
where𝑓𝑠denotes tracking from the entrance of the BTSline
to screen 𝑠. As the reconstruction in this work assumes a
nearlyGaussianbeamdistribution,eachpredictedtransverse
profile is reduced to its second moments,
𝒀(𝑖,𝑠)(𝜽) = (𝜎𝑥𝑥,𝜎𝑦𝑦,𝜎𝑥𝑦)(𝑖,𝑠). (6)
Thisscal... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6303.pdf | 1 |
e176fc2e-a838-40de-a011-6076fa5a8e98 | independentconstraintsfromdifferentlatticelocationsand
helpsreducedegeneracyamongbeamsigmamatricesthat
can produce similar moments at a single screen.
Because each operation in the workflow is differentiable,
the gradient ∇𝜽𝑙is obtained directly through AD. The
Cholesky parameters can then be updated with gradient
de... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6303.pdf | 1 |
f12ebc69-9a64-49b4-88c6-c1ad3ced00b6 | on the downstream FS3 and FS4 diagnostic screens. Two
dipolesarelocatedbetweenAQ5andBQ2,andtheregion
betweenFS3andFS4includesskewquadrupolesusedfor
emittanceexchange. Thetwoscreensthereforesamplethe
beam after different dispersive and coupled transport sec-
tions,providingcomplementaryconstraintsontheincoming
sigma mat... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6303.pdf | 1 |
d8982abb-8746-41a4-be1a-15dbec5df86e | 2000steps, corresponding to around 4 minutes of compu-
tation time on a laptop. The Run2result is shownin Fig. 2,
where the predicted moments from the reconstructed sigma
matrix are compared with the measured moments on FS3
andFS4,with 𝜎𝑥,𝑦beingthehorizontalandverticalbeam
sizes, and 𝜌𝑥𝑦= 𝜎𝑥𝑦/(𝜎𝑥𝜎𝑦)being t... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6303.pdf | 1 |
f8e91c13-c6d7-4934-8602-125e3f086133 | thesameday,whileeachrunusedadifferentscanset(see
above). Thereconstructedparametersarebroadlyconsistent
acrossthe three measurements: thehorizontal emittance is
near60nm, and the vertical emittance is near 1.2nm. All17th International Particle Accelerator Conference, Deauville, France JACoW Publishing
ISBN: 978-3-95450... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6303.pdf | 1 |
d0f7f6ae-8f75-460d-a5ef-1d6cf321ebcd | Table 1: Results of the beam matrix estimated from three
measurements. Each scan used a different set of quadrupole
settings. Run2and Run3weremeasured on the same day.
Parameter Run1 Run2 Run3
𝜖𝑥(nm) 60.6851 61.9216 59.9041
𝛽𝑥(m) 12.5346 12.4223 11.9061
𝛼𝑥 2.2871 2.3125 2.2326
𝜂𝑥(m) −0.3867 −0.3597 −0.3987
𝜂𝑥... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6303.pdf | 2 |
e389c821-a250-4a45-be75-b4430a6f4034 | consistencyobtainedfromthreeindependentlyselectedscan
sets suggests that the relevant minima are close in the physi-
calbeam-parameterspace. Thisrepeatabilityisanimportant
indication that the multi-screen formulation improves the
robustness of the reconstruction.
5 10 15 20 25 30
Number of images used2468MAE (m2)×108
Σ... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6303.pdf | 2 |
fa283b75-7f9b-409f-9b71-2f11f25dff5e | beammomentsdecreaseswithincreasingnumberofimages.
This is consistent with the fact that, although the problem is
formally overdetermined, it remains partially degenerate in
practice. The five-dimensional sigma matrix has 15 degrees
of freedom, while each image provides three observables,so in principle only five images... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6303.pdf | 2 |
e0db17c8-479e-410f-9bed-5164094bc54e | formation content of the measurement set.
Thepresentreconstructiondoesnotyetaccountforsev-
eral real-world effects. In particular, beam orbit variation
duringthequadrupolescancanleadtovariablecontribution
tothebeamsizes. Smallbutnotpreciselyknownquadrupole
misalignments also influence the result by introducing spu-
rio... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6303.pdf | 2 |
56bcc848-da71-44cd-aec8-2407867385a4 | consistent solutions. Its formulation is also flexible, making
itreadilyextensibletomoregeneralmeasurementconfigu-
rations, such as multi-screen setups, and broadly applicable
to transport lines with nonzero dispersion. Experimental
resultsdemonstrategoodconsistencyofthereconstructed
sigmamatricesacrossmeasurementstake... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6303.pdf | 2 |
cea5596d-42e4-420f-9e37-8ac1c5c9eaeb | We gratefully acknowledge the computing resources pro-
videdonSwing,ahigh-performancecomputingclusterop-
erated by the Laboratory Computing Resource Center at
Argonne National Laboratory.
REFERENCES
[1]M. Borland, V. Sajaev, and K. P. Wootton, “Promise and
Challenges of a Method for 5x5 Sigma Matrix Measurement
in a Tr... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6303.pdf | 2 |
bb2d1d70-8745-4f25-888e-251522a65e79 | [2]M.Borland,“ELEGANT:AflexibleSDDS-compliant code
for accelerator simulation”, Argonne National Laboratory,
Lemont, IL, USA, Rep. LS-287, Aug. 2000.
doi:1/zero.alt4.2172/761286
[3]J.Kaiser,C.Xu,A.Eichler,andA.SantamariaGarcia,“Bridg-
ingthegapbetweenmachinelearningandparticleaccelerator
physics with high-speed, differ... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6303.pdf | 3 |
6c522fb2-0820-48db-80fb-869a17dc24e0 | [5]D.Sagan,G.Hoffstaetter,M.Signorelli,andA.Coxe,“Bmad-
Julia: a Julia environment for accelerator simulations includ-
ingmachinelearning”,in Proc.IPAC’24 ,Nashville,TN,USA,
May 2024, pp. 2612–2615.
doi:1/zero.alt4.18429/JACoW-IPAC2/zero.alt424-WEPR52
[6]J. Wan, H. Alamprese, C. Ratcliff, J. Qiang, and Y. Hao,
“JuTrack... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6303.pdf | 3 |
100b490a-027a-492f-a050-3e9d04d3be20 | [8]R.Roussel etal.,“Efficientsix-dimensionalphasespacere-
constructions from experimental measurements using gener-
ative machine learning”, Phys. Rev. Accel. Beams , vol. 27,
no. 9, p. 094601, Sep. 2024.
doi:1/zero.alt4.11/zero.alt43/PhysRevAccelBeams.27./zero.alt4946/zero.alt41
[9]C. Xu, L. Emery, M. Borland, O. Mohs... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6303.pdf | 3 |
05d03aac-4eb2-4946-be20-ed399dd939df | May 2015. doi:1/zero.alt4.4855/zero.alt4/arXiv.1412.698/zero.alt4
[11]R.Roussel etal.,“AutonomousoperationoftheDIAG0diag-
nostic line for6D phase-space monitoring at LCLS-II”, Apr.
2026. doi:1/zero.alt4.4855/zero.alt4/arXiv.26/zero.alt44.2/zero.alt412517th International Particle Accelerator Conference, Deauville, Franc... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6303.pdf | 3 |
1e183a01-6ef2-4dd2-a23a-d5c623061c49 | A CONFIGURABLE UNSUPERVISED ANOMALY DETECTION SERVICE
FOR THE ADVANCED LIGHT SOURCE
K. Iliev∗, T. Hellert, S. C. Leemann, G. Martino, A. Sulc
Lawrence Berkeley National Laboratory, Berkeley, CA, USA
Abstract
Advanced Light Source (ALS) control systems operate
withcontinuousstreamsofmorethan200000EPICSPro-
cess Variable... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6305.pdf | 0 |
cc23f78c-b59d-4065-a78e-d95c6d97c7bb | ensuringdetectionqualitywithoutmanualsetpointtuning
perPV.Weshowthesysteminoperationonlivedatafromthe
ALSlinacmodulatorcapacitorvoltagedividerchannels,and
describeitsarchitectureasaconfigurable,multi-instanceser-
vicedrivenbyasingleJSONspecification,enablingstraight-
forwardextensiontoadditional PVgroupsastraining data... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6305.pdf | 0 |
fab214e9-7d0d-4df5-836c-7bfd1004b6ed | Theconventionalapproachtofaultdetectionreliesonper-
channel scalar thresholds: an alarm is raised when a single
PV exceeds a manually configured limit. While effective
forgrossfailures,thisstrategyhaswell-knownlimitations.
First, setting and maintaining thresholds for a large number
of channels is labor-intensive and p... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6305.pdf | 0 |
d1efa5f7-01d3-4233-9bb6-a9e1cc1a6a10 | 4]. Inthispaperwepresentananomalydetectionservicethat
learnsthetemporalstructureofnormalPVbehaviorfrom
unlabeledhistoricaldataandproducesasingle,interpretable
anomaly score in real time.
∗kirkiliev@lbl.govSYSTEM ARCHITECTURE
Design Goals
The service was designed around three requirements:
(i)zero labeled fault data, (i... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6305.pdf | 0 |
4636227b-2e40-4bff-87c6-d1f4737956e3 | list of PVs to monitor jointly, training data window, time-
gridresolution,modelhyperparameters,inferencepolling
interval, and anomaly threshold scaling factors. Multiple
instances run as independent threads within a single service
process, enabling concurrent monitoring of unrelated PV
groups.
Addinganewmonitoredgroup... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6305.pdf | 0 |
3d33e0ab-a859-4839-b4b4-89a37abac10d | "model_params": {"latent_dim": 8, "..."}
},
"inference": {
"context_hours": 2, "threshold_scale_warning": 2.0,
"threshold_scale_anomaly": 3.5, "...",
"output_pvs": {
"score": "LNRF:MOD1:CapVoltageDivider:
AnomalyScore"
}
},
"checkpoint_path": "models/checkpoints/
lnrf_modulators_v1.pt"
}]
Figure 1: AbbreviatedJSON conf... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6305.pdf | 0 |
c4142b56-92a7-49dc-b89e-42cf2964866e | ISBN: 978-3-95450-252-3 ISSN: 2673-5350 doi: 10.18429/JACoW-IPAC2026-WEP6305
MC6.D13: Instrumentation: Artificial Intelligence 2935WEP: Poster session WEP6305
Content from this work may be used under the terms of the CC BY 4.0 licence (© 2026). Any distribution of this work must maintain attribution to the author(s), t... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6305.pdf | 0 |
ce2bb49c-e0e6-4ee4-aa29-3157dd41380a | Training
Pipeline
Streaming
InferenceJSON ConfigArchiver FetchGrid Align +
NormalizeGRUOne-Class
TrainingCheckpoint
Context
BootstrapArchiverPoll
+ MergeGRUForward
+ MaskingScore + Status
Output
Figure 2: System pipeline using a Gated Recurrent Unit (GRU) one-class encoder. Training produces a self-contained
checkpoint... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6305.pdf | 1 |
ea9336f7-c93b-4621-b39f-776504c400ba | discarded,removingmachine-offperiodsandout-of-bounds
samples from the training set.
Eachchannelisthennormalizedusingitsempiricalmean
andstandarddeviation,withthestandarddeviationflooredat
a configurable minimum to prevent numerical instability on
near-constantchannels. Normalizationstatisticsarestored
in the checkpoint... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6305.pdf | 1 |
e9372594-4804-4712-ada9-99e3fe94f05e | use of a median rather than mean makes the baseline robust
to brief noise spikes.
GRU One-Class Encoder
ThemodelisaGRU[ 6]encoderthatconsumesthemul-
tichanneltimeseriesandproducesacompactlatentvector
summarizingitstemporalstructure,viaasinglelinearpro-
jection from the GRU’s final hidden state. All bias terms
throughou... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6305.pdf | 1 |
8c08e21d-26f6-4205-ab8b-f31ec45e3de2 | isset to the meanof the resultinglatent vectorsand is then
fixed. This standard Deep OCC [ 7] prevents the degener-
ate mode where a bias-free network maps everything to the
origin. Training uses the Adam optimizer with gradient
clipping (max norm 1.0).Threshold Calibration
Aftertraining,alltrainingsequencesarere-encod... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6305.pdf | 1 |
b9c00b6a-4268-46a7-bc50-6b54e051cead | the thresholds above nearly all observed normal behavior.
Both options are supported via the JSON configuration.
STREAMING INFERENCE
Context Bootstrapping
Beforethe streamingloop begins,the systemfetchesthe
most recent few hours of PV data from the archiver and
aligns it to the model’s time grid, forming a rolling cont... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6305.pdf | 1 |
934b2e11-0a8a-4c21-aec6-4755a1cafbb4 | withina bucket,themostrecentvalueupdates the cur-
rent row in place.
3.The context window is normalized using the stored
training statistics, baseline-subtracted, and passed
through the GRU encoder.
4.The anomaly score 𝑠 = ‖z−c‖is compared against
𝜏warnand𝜏anom.
Eachtickproduces a timestampedrecord containing the
in... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6305.pdf | 1 |
620d5ee3-5552-4522-bb18-fc7c06d94885 | ISBN: 978-3-95450-252-3 ISSN: 2673-5350 doi: 10.18429/JACoW-IPAC2026-WEP6305
2936 MC6.D13: Instrumentation: Artificial IntelligenceWEP6305 WEP: Poster session
Content from this work may be used under the terms of the CC BY 4.0 licence (© 2026). Any distribution of this work must maintain attribution to the author(s), t... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6305.pdf | 1 |
b2d4eb21-283d-4eb6-926f-ba27162d8e42 | 00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00 00:00232.0232.2232.4232.6232.8233.0PV ValueRaw PV Signals 2025-11-13
CapVoltageDivider
CapVoltageDivider
00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00 00:00
Time (PST/PDT)0.0000.0020.0040.0060.008Anomaly Score Anomaly 0.0108
Anomaly Score 2025-11-13 (seq_len=10 × 1m ... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6305.pdf | 2 |
35d8c056-fb4e-454c-aa7b-cb4a3499e9a3 | CapVoltageDivider
00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00 00:00
Time (PST/PDT)0.0000.0050.0100.0150.0200.025Anomaly Score
Anomaly Score 2026-02-05 (seq_len=10 × 1m steps)
Warning 0.0062
Anomaly 0.0108Linac Modulator Anomaly Detection 2026-02-05
Figure4: Anomalydetectiononaknownfaultday(2026-
02-05). Top: raw... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6305.pdf | 2 |
f239e5b7-200b-418e-8bb8-7c1fee7e4a37 | Recoverysuppression. After a machine-off →machine-
on transition, the context buffer still contains stale filled
values. To prevent false anomaly alerts during this transient,
scoring is suppressed for a configurable number of recov-
ery steps (default 10 grid points) following any off-state
observation.
These two mech... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6305.pdf | 2 |
f2850465-7f4e-44a2-8386-23462fd5e0b9 | stable user operations sampled on a 1mingrid (𝑠 = 60s),
withaslidingwindowof 𝐿 = 10timesteps(i.e.,a 10minute
contextwindow). Baselinesubtractionusesthemedianof
the full sequence. The per-channel standard deviation floor
issetto0.5,andtheGRUlatentdimensionis 𝑑 = 8(selected
empirically for this PV group). Gradient cli... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6305.pdf | 2 |
e3edbd81-5f62-4fe2-9c35-7b8b98c1fe33 | shows a representative day of stable beam operations: theanomalyscore remains steadynear 0.002, wellbelowboth
the warning and anomaly thresholds.
Figure4demonstrates the system responding to a known
hardware event on 2026-02-05, in which one modulator
capacitor voltage divider channel dropped abruptly by 1 kV
around 14... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6305.pdf | 2 |
e7c81d50-01a6-4fdf-974a-bab55517fb60 | andresetbyanoperator,separatingdetection(event-style,
in software) from alarm persistence (latched, in EPICS).
The configuration-driven architecture allows this detector
charactertobetunedper PVgroup: shorter windowsfavor
event-style detection of abrupt faults; longer windows favor
state-style tracking of persistent de... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6305.pdf | 2 |
fbdf5304-0b36-4168-b4b6-11b52fd394aa | ALS-U. Future work will focus on integration with the ALS
alarmhandler,expansiontoadditionalsubsystems,and ex-
plorationofattention-basedarchitecturesforlongertemporal
contexts.
ACKNOWLEDGEMENT
This work was supported by the Director of the Office of
Science of the U.S.Department of Energy under Contract
No. DEAC02-05C... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6305.pdf | 2 |
b061aed1-ddd2-4346-a580-f86e45314659 | REFERENCES
[1]T.Hellert etal.,“StatusoftheAdvancedLightSource”,in Proc.
IPAC’24, Nashville, TN, USA, May 2024, pp. 1309–1312.
doi:1/zero.alt4.18429/JACoW-IPAC2/zero.alt424-TUPG37
[2]L. R. Dalesio et al., “The Experimental Physics and Industrial
Control System Architecture: Past, Present, and Future”, Nucl.
Instrum. Met... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6305.pdf | 3 |
939a6429-6363-4c18-9694-f7a5aa9babed | Detection on SRF Cavities at the European XFEL”, in Proc.
IPAC’22, Bangkok, Thailand, Jun. 2022, pp. 1152–1155.
doi:1/zero.alt4.18429/JACoW-IPAC2/zero.alt422-TUPOPT/zero.alt462
[5]M. V. Shankar et al., “The EPICS Archiver Appliance”, in
Proc. ICALEPCS’15 , Melbourne, Australia, Oct. 2015, pp.
761–764.
doi:1/zero.alt4.1... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6305.pdf | 3 |
c4016428-0d2c-4327-be79-71af22c50839 | ISBN: 978-3-95450-252-3 ISSN: 2673-5350 doi: 10.18429/JACoW-IPAC2026-WEP6305
2938 MC6.D13: Instrumentation: Artificial IntelligenceWEP6305 WEP: Poster session
Content from this work may be used under the terms of the CC BY 4.0 licence (© 2026). Any distribution of this work must maintain attribution to the author(s), t... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6305.pdf | 3 |
63442c65-6929-4d8d-b554-8994b8ecf6ef | LLRF PROTOTYPE DESIGN FOR THE 1.3 GHZ CRYOMODULE OF THE
SHENZHEN SUPER -CONDUCTING SOFT X- RAY FEL *
J. Zhu†, Y. L i , W. Li, Z . Zhang, Institute of Advanced Light Source Facilities, Shenzhen , China
H. Ding‡, J. Yang, W. Zhang, Dalian Institute of Chemical Physics, Dalian, China
Abstract
This paper presen... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6603.pdf | 0 |
61b90099-ac7c-4baa-a1cd-36aa30fc8dfe | controller boards for driving eight coupler motors, eight
cavity tuner motors, and sixteen piezoelectric actuators (PZTs). A high -speed peer -to-peer (P2P) backplane bus en-
ables real -time communication between RF and tuner con-
trol boards. The report outlines the hardware architecture
of this modular LLRF system... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6603.pdf | 0 |
e46861ff-fb5b-4570-89d8-fc73a35d5a83 | energy of up to 2.5 GeV and a pulse repetition rate of up to
1 MHz [1]. Such demanding operating conditions impose
stringent r equirements on the stability of the RF field
amplitude and phase within the accelerating cavities.
To maintain stable accelerator operation under high rep-
etition -rate conditions and ext... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6603.pdf | 0 |
b7670efc-229e-4919-8659-ba1f949265c6 | MTCA.4 -based LLRF prototype system for the S3FEL
standard superconducting cavity module. The system is ca-
pable of RF field acquisition, microwave drive generation,
and cavity resonance tuning through feedback control, thereby meeting the strict stability requirements of the ac-
celerator.
Figure 1: Topology o... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6603.pdf | 0 |
68853eef-7adb-43c1-a984-09c6596f9a98 | tion and high- speed signal interconnections.
Each control module consists of an Advanced Mezza-
nine Card (AMC) and a Rear Transition Module (RTM)
[2]. Figure 2 shows the RF control board. The RF AMC
card performs microwave drive regulation and digital sig-
nal processing, while the RF RTM card is responsible for ... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6603.pdf | 0 |
bf882805-c872-4705-8e28-101ca49b48cd | eight cavities. For each cavity, one slow tuner motor con-
trol channel, two piezoelectric actuator (PZT) control
channels, and one coupler motor control channel are re-
quired [4]. To fulfill these requireme nts, the system inte-
grates two pairs of MTCA.4 tuning control boards, each
consisting of one AMC and one RT... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6603.pdf | 0 |
ae35c75f-2b9c-4ab1-88e2-670824eafa4b | (Grant No. 12405221) .
† zhujinfu@mail.iasf.ac.cn
‡ dinghongli@dicp.ac.cn 17th International Particle Accelerator Conference, Deauville, France JACoW Publishing
ISBN: 978-3-95450-252-3 ISSN: 2673-5350 doi: 10.18429/JACoW-IPAC2026-WEP6603
MC6.T27: Instrumentation: Low Level RF 2939WEP: Poster session WEP6603
Conten... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6603.pdf | 0 |
ef29aec2-c651-4da9-b0dd-9d1ffc897048 | control, whereas each RTM board provides eight 16- bit
DAC channels for high- precision PZT actuation.
The coupler motor is used to adjust the external coupling
strength of the cavity, thereby regulating the cavity quality
factor. Both the tuning motors and the piezoelectric actua-
tors are employed for cavity res... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6603.pdf | 1 |
60192e91-7f13-4e09-b1b0-3e3046cb3e6b | from the cavity are first processed by the RTM through an-alog mixing and filtering st ages before being transmitted to
the AMC for analog -to-digital conversion. The FPGA im-
plemented on the AMC performs IQ demodulation to ex-tract the amplitude and phase information of the RF field.
Based on the acquired field si... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6603.pdf | 1 |
80bc1ec5-07a5-4f79-8218-5dc7577f3955 | isolated FMC outputs. Meanwhile, the RTM outputs finely adjustable drive voltages to the PZT actuators through
eight 16 -bit DAC channels, enabling rapid compensation
of cavity frequency deviations. The entire hardware architecture adopts a highly modu-
lar MTCA.4 AMC/RTM design, facilitating system scala-
bility, m... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6603.pdf | 1 |
9eaa8082-a689-4460-b48f-d8589109b10d | the corresponding RF excitation signals.
Figure 4 shows the measured amplitude noise and phase
noise of the output RF signal. The root mean square (RMS)
amplitude noise was measured to be below 0.02%, while
the RMS phase noise was below 0.02°. In addition, the
measured signal -to-noise ratio (SNR) reached 74.92 ... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6603.pdf | 1 |
61ab2dbe-58d4-4197-93f7-efced97c9751 | 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Time/s-0.04-0.0200.020.04Magnitude/%Amplitude Noise
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Time/s-0.04-0.0200.020.04Phase/°Phase Noise17th International Particle Accelerator Conference, Deauville, France JACoW Publishing
ISBN: 978-3-95450-252-3 ISSN: 2673-5350 doi: 10.18429/JACo... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6603.pdf | 1 |
ed6bd360-7671-4e39-904d-4b0d7ea43032 | achieved RF amplitude and phase regulation accuracy sat-
isfies the design specifications. These preliminary experi-
mental results confirm that the proposed LLRF prototype
is capable of meeting the stringent stability requirements of the S
3FEL accelerator.
CONCLUSION
An MTCA.4 -based LLRF prototype system for the... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6603.pdf | 2 |
7ed9337d-c157-4b3f-8df7-7b259b894a08 | formance for high -stability RF field regulation in the
S
3FEL accelerator. Future work will focus on integrated
testing with superconducting cavities and further optimiza-
tion of both hardware architecture and control algorithms
to enhance the overall performance of the LLRF system.
REFERENCES
[1] W. Q. Zhang,... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6603.pdf | 2 |
ca344bdf-9ff2-48ad-9d30-57de9491a81a | Oct. 2015, pp. 876-880.
doi:10.18429/JACoW- ICALEPCS2015- WEPGF074
[4] Zhu, J. F., et al . "Design of an MTCA.4-based LLRF tuning
controller for cryomodules at S3FEL." In Proc. SRF2025 ,
Tokyo. , Japan. doi:10.18429/JACoW- SRF2025- TUP69
[5] M. Felber et al. , “Implementation of MTCA.4 -based Controls
for the... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6603.pdf | 2 |
4c86fc39-0c56-4311-abe4-a43581124f23 | DIGITAL LLRF CONTROL SYSTEM FOR A HIGH- REPETITION -RATE
SUPERCONDUCTING LINAC *
Z. Zhang, J. Han, W. Li, J. Zhu†
Institute of Advanced Light Source Facilities Shenzhen, Shenzhen, China
H. Ding‡, J. Yang, W. Zhang, Dalian Institute of Chemical Physics, Dalian, China
Abstract
The development of high- repeti... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6604.pdf | 0 |
67976cf7-a242-433c-ab27-cb1e563a5660 | (FPGA), enabling high- speed I/Q modulation and demod-
ulation, vector summation, and low -latency feedback con-
trol to address the narrow bandwidth challenge posed by
superconducting cavities with loaded quality factors up to 4.3×10⁷ (half -bandwidth ~15 Hz). High- resolution pi ezo
actuators are integrated for act... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6604.pdf | 0 |
761b7aa7-7c16-4e16-8f51-e373cb24f53a | next-generation high- repetition -rate light sources.
INTRODUCTION
The linac section mainly consists of four components:
an electron gun [1], a buncher, two 2 -cell superconducting
cavities, and eight 9 -cell superconducting cavities. The
electron gun generates electrons, and the buncher captures electrons with... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6604.pdf | 0 |
f45d4218-75ae-4434-a672-00f1db0ebea8 | ity, the design of the RF control loop and tuning control
loop scheme, and the results of high- repetition -rate beam
experiments conducted based on this control system.
In
this experiment, the superconducting cavities have QL =
2×10⁷ (half -bandwidth = 32 Hz) and QL = 4.3×10⁷ (half -bandwidth = 15 Hz). In subse... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6604.pdf | 0 |
052dec6a-b4be-4e58-aead-86dabc4e0181 | 𝑃𝑃𝑔𝑔=𝑉𝑉𝑐𝑐2
�𝑟𝑟
𝑄𝑄�𝑄𝑄𝐿𝐿1
4��1 +�𝑟𝑟
𝑄𝑄�𝑄𝑄𝐿𝐿𝐼𝐼𝑏𝑏0
𝑉𝑉𝑐𝑐�2
+�2∆𝑓𝑓𝑄𝑄𝐿𝐿
𝑓𝑓�2
� (1)
The physical meaning and numerical values of the vari-
ables in Eq. (1) are listed in Table 1. We primarily consider
two operating conditions: one is the conditioning mode, which is applied after cavit... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6604.pdf | 0 |
017c4441-aea0-4f2f-832c-f5d54a2252f8 | a higher Q L corresponds to lower power requirements for
achieving a given cavity voltage. However, as Q L increases
further, the rate of change of SSA power with respect to Q L
diminishes.
For the second mode, with a cavity detuning frequency
of 10 Hz and a beam current of 0.1 mA, the relationship
between SSA p... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6604.pdf | 0 |
98958771-ed8c-4a74-beb2-24e17846cc3e | ISBN: 978-3-95450-252-3 ISSN: 2673-5350 doi: 10.18429/JACoW-IPAC2026-WEP6604
2942 MC6.T27: Instrumentation: Low Level RFWEP6604 WEP: Poster session
Content from this work may be used under the terms of the CC BY 4.0 licence (© 2026). Any distribution of this work must maintain attribution to the author(s), title of the... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6604.pdf | 0 |
54c95950-f16e-4894-8863-0c46909ebb40 | QL < 4.3×10⁷, SSA power decreases as Q L increases;
whereas for Q L > 4.3×10⁷, SSA power increases as Q L in-
creases.
Figure 1: Variation of SSA power with QL in conditioning
mode.
Figure 2: Variation of SSA power with Q L in beam opera-
tion mode .
Considering both scenarios comprehensively, we adjust
QL ... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6604.pdf | 1 |
00e5fa4d-0caa-4af7-b3d0-d53d6b79753b | suppress these disturbances. Since microphone detuning is
random noise, feedforward control is not applicable, and
we mainly rely on feedback control to maintain cavity volt-
age stability. The feedback control adopts a dual closed-
loop control scheme combining tuning control loops and
RF control loops. The tuning ... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6604.pdf | 1 |
12ba8ff3-fb95-411c-90d6-fae4a515443c | the forward power signal PF. Then, a PI controller is used
to control the DAC output voltage, which in t urn drives the
PZT to adjust the cavity to resonance. Here, Non- IQ de-
modulation converts the RF signal to a baseband signal.
CORDIC converts the I/Q signals into amplitude (A) and
phase (P) signals, and only... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6604.pdf | 1 |
727f9b20-e5e5-4cbf-af09-ebc5c700ae35 | closed -loop. We primarily adopt the amplitude -phase
closed -loop, which offers the advantage of not requiring
loop phase shift correction compared to the IQ closed- loop.
Within the loop, the functions of the Non- IQ demodulation,
CIC filter, and PI controller are consistent with those de-
scribed for the tuning... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6604.pdf | 1 |
bcd03c93-226b-430c-8ab5-4ab9683ceec7 | Vc=16MV
Vc=20MV
17th International Particle Accelerator Conference, Deauville, France JACoW Publishing
ISBN: 978-3-95450-252-3 ISSN: 2673-5350 doi: 10.18429/JACoW-IPAC2026-WEP6604
MC6.T27: Instrumentation: Low Level RF 2943WEP: Poster session WEP6604
Content from this work may be used under the terms of the CC BY 4.0 l... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6604.pdf | 1 |
7f3d57b0-7057-495a-9a17-802532b06b09 | RESULTS OF HIGH- REPETITION -RATE
BEAM EXPERIMENTS
The designed LLRF control system was tested with a
high- repetition -rate beam on the DALS platform. Under
conditions of 100pC charge and a beam repetition fre-
quency of 1 MHz, the tuning closed- loop and RF closed-
loop operations were performed. The frequency... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6604.pdf | 2 |
27a5f7b7-dbd3-4bc4-bced-d2fb46925de1 | closed -loop operation are shown in Fig. 6. The RMS re-
quirements for amplitude and phase noise are less than
0.02% and 0.02°, respectively. The actual measured RMS
values for amplitude and phase noise are 0.0074% and 0.0063°, respectively, both of which outperform the design
specifications.
Figure 6: Amplitud... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6604.pdf | 2 |
7ebb60c0-b23f-4f8b-afa3-04a1dd8b540f | Figure 7: Beam energy and beam energy stability .
CONCLUSION
This paper introduces the advantages of narrow -band-
width cavities in reducing power consumption and presents
the design of an LLRF control system to stabilize a 15 Hz
narrow -bandwidth cavity with a 1 MHz high- repetition -
rate beam. High -repetition... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6604.pdf | 2 |
57282d91-b635-444c-97e2-aac7b37dd51e | cations in Astronomy, Communications, Industry and High -
Energy Physics Experiments (SPIE 5125 ), Wilga, Poland ,
Oct. 2003.
doi:10.1117/12.531871
[3] R. Rybaniec et al. , “Microphonic Disturbances Prediction
and Compensation in Pulsed Superconducting Accelerators”, in Proc. IP AC'15 , Richmond, V A, USA, Ma... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6604.pdf | 2 |
deb16271-d9ad-4918-9d55-ab2282552efe | 17th International Particle Accelerator Conference, Deauville, France JACoW Publishing
ISBN: 978-3-95450-252-3 ISSN: 2673-5350 doi: 10.18429/JACoW-IPAC2026-WEP6604
2944 MC6.T27: Instrumentation: Low Level RFWEP6604 WEP: Poster session
Content from this work may be used under the terms of the CC BY 4.0 licence (© 2026).... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6604.pdf | 2 |
1f399175-9317-488b-9c2b-f379a8ac6cb0 | LONGITUDINAL BEAM DIAGNOSTICS WITH A STREAK CAMERA AT
TAIWAN PHOTON SOURCE
C.Y. Liao∗, C.Y. Wu, Z.K. Liu, Y.S. Cheng, K.T. Hsu
National Synchrotron Radiation Research Center, Hsinchu, Taiwan, R. O. C.
Abstract
TheTaiwanPhotonSource(TPS)streakcamerasystem
hasbeenusedforlongitudinalbeamstudiessincetheearly
commissioning ... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6607.pdf | 0 |
49e02254-2103-4b24-b5fa-5308b322f388 | HCsettingsforcomparison ofbunchlengtheningandphase
shift. Under operation with the passive SRF HC, a phase
driftofabout 35psisobservedalongthebunchtrain,consis-
tentwithtransientbeamloadingunderquasi-uniformfilling.
Thesemeasurementsshowthatthestreakcameraisuseful
for longitudinal diagnostics and machine studies at TPS... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6607.pdf | 0 |
20f59a3e-65e4-4415-ba75-6adfbfbc750e | theTPSdiagnosticbeamline(BL40)[ 2],ultrashortbunch
measurementsinlow-alphaoperation[ 3],andinvestigations
ofimpedanceeffectsundersingle-bunchconditions[ 4]. Lon-
gitudinalinstabilityphenomenaunderhigh-currentopera-
tionhavealsobeenreported[ 5,6]. Asbackground,Liu et
al.reported instability in TPS operation with a super... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6607.pdf | 0 |
5ee51a1e-ce41-4ff9-8a25-d1250af25d20 | the storage ring. The block diagram of the streak camera
∗liao.cy@nsrrc.org.twmeasurement system is shown in Fig. 1. The main instru-
ment is a dual-sweep streak camera, C10910 from Hama-
matsuPhotonics[ 10],equippedwithonefastsweepunit,one
slow sweep unit, and two synchroscan sweep frequencies
(125MHz/250MHz)fortempor... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6607.pdf | 0 |
c3f88786-61f2-4f69-95e9-95b16b8693aa | tion. Thestreakcameratemporalresolutionisabout 1ps,as
verified with a femtosecond laser source. The dual-sweep
modepreservesbothfast-sweepandslow-sweepinformation
simultaneously and is therefore suitable for observing the
relative behavior of multi-bunch over a period of time. In
thepresentmeasurements,thedual-sweepmod... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6607.pdf | 0 |
3af909a6-f36f-4066-8175-42118839465a | thestreakcameraimagesprovidedqualitativeevidenceof
multi-bunch longitudinal instability. As shown in Fig. 2,
the bunches in the leading part (a) of the train remained
stable in longitudinal position, whereas wave-like oscilla-
tiontrajectoriesappearedneartheendofthemulti-bunch-
filled section (b), suggesting longitudin... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6607.pdf | 0 |
8bad10e0-c27c-48ff-abd7-f99ca6553620 | Figure2: StreakcameraimageoftheCU15high-currentcase,withenlargedregionsshowingstableandunstablebunch
patterns.
the same level of oscillation. Further investigation using
GdfidLelectromagneticsimulationspredictedanunstable
mode at 327. However, modal analysis of the measured
data identified unstable modes at 396 and 398... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6607.pdf | 1 |
abbed000-8e00-41fe-beff-c81bc0fb9f59 | toremovethecavity-likegeometry,followedbyadditional
cooling improvements to the CU15 system [ 6]. After these
modifications, 500mAoperationbecamethermallystable,
and the associated longitudinal instability was no longer
observed.
Figure3: Experimentalanalysisoflongitudinalmulti-bunch
instabilityduring 500mAoperationint... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6607.pdf | 1 |
58677dcf-f2a4-49f8-8e35-3244e68d0a42 | the streak image, the longitudinal projection is converted
intothetemporalbunchdistribution,andthebunchlength
is obtained from the sigma of a Gaussian fit. More recently,
these measurements have been extendedto bunch behavior
under operation with the passive SRF HC. For different fill
patternsandSRFHCgapvoltages,theres... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6607.pdf | 1 |
dc8b3c26-0568-4a9a-8ee2-44a048a2ab91 | and equal bunch current, is expected to give a more con-
centrated bunch-length distribution. However, the present
TPS injection condition cannot yet provide such a perfect
uniformfill,themeasuredcaseisreferredtohereasquasi-
uniform fill. For quasi-uniform fill at 500mA,1600min
beam lifetime, and 1000kVSRF HC gap volta... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6607.pdf | 1 |
ef64da15-e86d-4ae7-8d79-0313e72bc8c0 | ISBN: 978-3-95450-252-3 ISSN: 2673-5350 doi: 10.18429/JACoW-IPAC2026-WEP6607
2946 MC6.T03: Beam Diagnostics and InstrumentationWEP6607 WEP: Poster session
Content from this work may be used under the terms of the CC BY 4.0 licence (© 2026). Any distribution of this work must maintain attribution to the author(s), title... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6607.pdf | 1 |
e7a702a6-db85-4397-b660-c600d850a1ca | 900kV), and, at the higher voltage, a noticeable decay after
the peak (950kV).
Figure 4: Measured bunch length distribution under SRF
HC operation.
Figure5: BunchlengthvariationasafunctionofSRFHC
gap voltage.
Synchrotron Phase Shift Measurements on SRF
HC Test
Measurementsofsynchronousphaseshiftreflectthein-
fluence of... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6607.pdf | 2 |
2dc899a3-7c0a-420e-8a79-3236f9e26bad | seenbyeachbunchandleadstodifferentphase-centerpo-
sitionsalongthetrain. Inthispaper,thedual-sweepstreak
imageshowstherelativephase distribution under SRF HC
conditions and is compared with the bunch length results.
For quasi-uniform fill at 500mA,650minbeam lifetime,and operation with the passive SRF HC, Fig. 6shows a
... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6607.pdf | 2 |
5135e06d-36c6-47c0-8495-7359ea4faae8 | signatures of multi-bunch longitudinal instability. Under
recentSRFHCoperation,themeasurementswereusedto
comparebunchbehaviorfordifferent fillpatternsand SRF
HCsettingsandtofollowmulti-bunchvariationsinbunch
lengthandsynchrotronphase. Theseresultsshowthepresent
role of the TPS streak camera in longitudinal diagnostics.... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6607.pdf | 2 |
64fb4217-1210-4110-9b5d-59fa5c18d23a | doi:1/zero.alt4.18429/JACoW-IPAC2/zero.alt415-MOPTY/zero.alt474
[3]C.H.Chen etal.,“Bunchlengthmeasurementswithastreak
camera in low alpha lattice operation at the TPS”, in Proc.
IPAC’18, Vancouver, BC, Canada, Apr.–May 2018, pp.
4207–4210. doi:1/zero.alt4.18429/JACoW-IPAC2/zero.alt418-WEPAL/zero.alt462
[4]C.C. Kuo et a... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6607.pdf | 2 |
4545f582-6b50-4649-8b7c-ea73e40db58e | ISBN: 978-3-95450-252-3 ISSN: 2673-5350 doi: 10.18429/JACoW-IPAC2026-WEP6607
MC6.T03: Beam Diagnostics and Instrumentation 2947WEP: Poster session WEP6607
Content from this work may be used under the terms of the CC BY 4.0 licence (© 2026). Any distribution of this work must maintain attribution to the author(s), title... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6607.pdf | 2 |
ef2678f5-6edd-43e3-a519-27691064d1e7 | [6]J.Y. Chen et al., “An issue of the cavity-like structure inside
the insertion device at the TPS storage ring”, Nucl. Instrum.
Methods Phys. Res. A , vol. 1016, Art. no. 165772, Nov. 2021.
doi:1/zero.alt4.1/zero.alt416/j.nima.2/zero.alt421.165772
[7]Z.K. Liu et al., “Study on the Instability of TPS With Su-
perconduc... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6607.pdf | 3 |
1a766307-b01c-45b5-b835-861f8caf5045 | tion”, presented at TTC2025 Meeting , IRIS/IBS, Daejeon, Ko-
rea,Apr.2025. https://indico.ibs.re.kr/event/846/
contributions/737/zero.alt4/
[10]HamamatsuPhotonics, “Manual of universalstreakcamera
C10910series”,2012. https://www.bnl.gov/atf/docs/
hamamatsu_streak_camera_c1/zero.alt491/zero.alt4.pdf17th International Pa... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6607.pdf | 3 |
0306830c-dd1e-4ab3-ad67-856120bf5ae8 | DEFINING THE NEW FCC-ee BASELINE OPTICS
J. Keintzel∗, X. Buffat, C. Carli, M.A. Jebramcik, S. Kostoglou, K. Oide,
P. Raimondi, G. Roy, K. Skoufaris, R. Tomás, F. Zimmermann
CERN, Geneva 23, Switzerland
Abstract
The Future Circular electron-positron Collider (FCC-ee),
with a circumference of approximately 91 km, is bein... | D:\Daily_ihep\Conferences\IPAC2026\WEV\WEV1001.pdf | 0 |
8e684344-6cd5-4d73-9ab4-ef711d1d7852 | proposal uses both vertical and horizontal chromatic cor-
rection sections in the IRs and keeps a modular design. A
comparisonprocesswascarriedout betweenlate2025 and
early2026 to prepareforthe reviewprocess ofthe FCC-ee
baselinemagneticlatticeandopticsinviewoftheTechnical
DesignReport. Thiscontributionpresentsthecompa... | D:\Daily_ihep\Conferences\IPAC2026\WEV\WEV1001.pdf | 0 |
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