id stringlengths 36 36 | text stringlengths 1 1k | source stringlengths 42 191 | page int64 0 1.03k |
|---|---|---|---|
dc135e18-4386-485e-a565-387bbe2bd2be | controlsystemconfiguration,fromanewEPICSrecord
to a database schema change, is managed via Git. A
git push command automatically triggersthe pipeline,
whichvalidatesthecodeandupdatestheCICStesten-
vironment in real-time.17th International Particle Accelerator Conference, Deauville, France JACoW Publishing
ISBN: 978-3-9... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6103.pdf | 1 |
2fe924f0-5fc0-4898-92cb-c68ef04dc4da | SOFTWARE DEVELOPMENT KIT FOR
LICS STANDARDIZATION
Since IFMIF-DONES consists of multiple subsystems
developed by different in-kind contributors, there is a sig-
nificant risk of technical fragmentation in the control logic.
Thisdistributeddevelopmentmodelposesasignificantchal-
lenge for the integration and maintenance ... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6103.pdf | 2 |
4d7a4447-0d41-44eb-adc9-fdd5e766febd | modular and containerized environment based on Debian
Linux. Byprovidingthis“ready-to-use”stack,theproject
ensures that any LICS developed, regardless of its origin,
ispre-configuredforagileEPICSdeploymentandfeatures
modern industrial connectivity under the OPC UA standard.
Thisapproachnotonlystreamlinestheintegrationp... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6103.pdf | 2 |
fa0c6719-4667-4ff7-acc1-e9483c09289d | CONCLUSION
The development of the CICStest platform has demon-
strated the feasibility of applying the “Control as Code”
philosophyinthecontrolenvironmentforIFMIF-DONES.
Thecoreachievementofthisworkliesintheorchestrationof
acomplexcontrolstackthroughtheintensiveuseofAnsible
in a continuous integration environment.
By d... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6103.pdf | 2 |
8685742e-1327-4814-937e-d0d3fd8cd009 | transversal systems in large-scale facilities.
The implementation of GitLab CI/CD pipelines acts as
the final orchestrator of this logic. Each time a developer
modifiesacontrolconfigurationoradeploymentrule,the
pipeline triggers the corresponding Ansible execution. This
workflowdoesmorethanjustdeploysoftware;itvalidate... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6103.pdf | 2 |
55d272ee-9c91-47dd-a223-148d3c50349f | TheCICStestplatformisdesignedforcontinuousevolu-
tion. Futuredevelopmentswillfocusonthreemainstrategic
areas to reach full operational readiness:
•CompletionoftheControlStack: Prioritywillbegiven
tothefullintegrationandvalidationoftheremaining
Phoebus services. This includes the deployment of the
AlarmLoggerforpersiste... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6103.pdf | 2 |
0eafb638-e505-4ee6-80fb-a5877180fdfc | as well [8]. This will allow for granular user man-
agementandsecureaccesscontrolacrossallplatform
interfaces,fromtheGitLaborchestratortothePhoebus
dashboards.
•Real environment integration: For a transition to hard-
ware testing, to independent stations will be connected
toCICStest,workingas LICS, starting with a PLC,... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6103.pdf | 2 |
5f92d050-aa9f-4940-bf8f-28bf60a62660 | toring Module Prototype) [ 10], and other future prototypes.
IntegratingthesethreesystemsintoCICStestwillbeamajor
milestone toward a fully unified and standardized central
control system.
REFERENCES
[1]A. Ibarra et al., “The IFMIF-DONES project: preliminary
engineeringdesign”, Nucl.Fusion ,vol.58,p.105002,Aug.
2018. do... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6103.pdf | 2 |
76ce4950-8518-4e79-b5af-26a09777d350 | [2]M. Capelli et al., “The IFMIF-DONES control architecture:
the state-of-the-art design of central and local control sys-
tems and communication networks”, Nucl. Fusion , vol. 65,
p. 122003, Sep. 2025. doi:1/zero.alt4.1/zero.alt488/1741-4326/adc1dd
[3]ControlSystemStudio,“ServicesArchitecture”,CS-Studio
documentation.... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6103.pdf | 3 |
c6eea641-233d-4281-b667-2408660ceb04 | Apr. 2026. https://indico.in2p3.fr/event/37441/
contributions/1723/zero.alt49/
[6]R. Nicole, “Deploying every Phoebus service on a sin-
gle machine with EPNix”, presented at Spring EPICS
collaboration meeting 2026, Gif-sur-Yvette, France, Apr.2026. https://indico.in2p3.fr/event/37441/
contributions/172289/
[7]R. Lange ... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6103.pdf | 3 |
6fb3220a-49a7-4faf-a0cf-4c607078844a | the IFMIF-DONES accelerator”, Fusion Eng. Des. , vol. 222,
p. 115473, Jan. 2026.
doi:1/zero.alt4.1/zero.alt416/j.fusengdes.2/zero.alt425.115473
[10]S. Becerril-Jarque et al., “A real-sized start-up monitoring
module prototype for comprehensive test and irradiation
campaigns of miniaturized neutron detectors according t... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6103.pdf | 3 |
ff84c082-f8bf-4794-b554-6f65117c7c8c | RF-API: A MODULAR CONTROL FRAMEWORK IN EPICS
FOR RF SYSTEMS AT CLARA∗
N. Y. Joshi†,1,2, A. E. Wheelhouse1,2, J. Wilson3, W. Edward-Olaniyi3
1ASTeC, STFC Daresbury Laboratory, Warrington, UK.
2The Cockcroft Institute, STFC Daresbury Laboratory, Warrington, UK.
3Technology Department, STFC Daresbury Laboratory, Warringto... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6104.pdf | 0 |
fa76b286-9685-4f9c-8671-493b93f85ffc | higher-level machine control applications. It also enhances
operationalsafetybymonitoringunintendedperformance
orconfigurationdeviationsintheRFsystems,automatically
alerting RF experts to potential degradation. This paper
presents the design, capabilities, and performance of the
RF-API and its associated user interface... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6104.pdf | 0 |
357e95c4-b93b-4879-9cb7-e64821f9deb2 | conducting S-band standing-wave gun, four travelling-wave
linac structures, and an X-band lineariser to accelerate elec-
tron bunches to energies up to 250 MeV. Key beam parame-
ters, including bunch length and arrival time, are measured
using an S-band RF transverse deflecting cavity (TDC).
EachRFcavityispoweredbyanin... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6104.pdf | 0 |
458c7323-ba58-4a97-b1d3-cdde5bab6cfd | AlthoughHVPSparametersaretypicallyadjustedonlyunder
∗Thisworkis funded bySTFC-UKRI.
†Nirav.Joshi@stfc.ac.uk
Operator GUI
Track
changesPower & phase
stabilisationHold Modulator
& LLRF onRF-API implemented in EPICS
LLRF
RF
accelerating
structureRF breakdown
detector, machine
protection and PS
interlocks
Modula... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6104.pdf | 0 |
82b0e79d-b461-4067-b082-6a32428dba51 | user interface (GUI) have been developed using EPICS and
Control System Studio (CS-Studio) [ 7] respectively.
OPERATOR GUI INTERFACE
The operator GUI panels for all seven RF systems are
standardisedandpresentedwithinasingleinterfacetoensure
aconsistentandefficientuserexperience,asshowninFig. 2.
The GUI is organised int... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6104.pdf | 0 |
98726f27-4982-4514-a82a-87ec6d8dcbd9 | error messages, and suggested recovery actions via a rolling
buffer. In addition, anembedded plotting interfaceenables
short-term monitoring of RF powers, phases, and cavity
temperatures.17th International Particle Accelerator Conference, Deauville, France JACoW Publishing
ISBN: 978-3-95450-252-3 ISSN: 2673-5350 doi: 1... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6104.pdf | 0 |
3335d203-4fe7-405f-869f-77aa3afe1eb5 | Figure2: OperatorGUIpaneltocontroltheRFsystemfor
the TDC.CONTROL LOGIC AND FEATURES
The RF-API is designed to provide an optimal balance
betweenautomationandoperationalflexibility. Itscontrol
architectureismodular,withindividualfunctionalcompo-
nents integrated through EPICS sequencers. Input/output
controllers (IOCs) ... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6104.pdf | 1 |
c81d5a2a-8795-4859-9a90-f16d138dc913 | HVPSvoltage. Thisfilecontainssystem-specificparameters,
includingPIDgainsforpowerandphasecontrol,acceptable
power tolerances ( 𝑃allowed), and soaking durations ( 𝑡soak).
The absence of a valid configuration file prevents system
activation, thereby enforcing prior validation by RF experts.
Followingsuccessfulvalidatio... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6104.pdf | 1 |
e7e5210c-b922-4421-9794-c953b6dd1433 | responsecurve. ApowerresponsecurvefortheTDCRFsys-
temisplottedinFig. 4. ForsmalleradjustmentsaPID-based
approach is employed.
At each step, the deviation between measured and re-
questedpower( 𝑃error)iscontinuouslyevaluated. If 𝑃errorex-
ceeds the acceptable tolerance ( 𝑃allowed), the ramp sequence
ishaltedandRFexpe... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6104.pdf | 1 |
5a10fe03-38a3-444d-b3bb-903866388262 | erenced to 0∘, thereby mitigating instability associated with
phasewrappingnear ±180∘. Additionalcompensationmech-
anisms are incorporated to account for temperature-induced
phase variations in travelling wave linacs. In specific cases,
stabilisation of a weighted combination of input and out-
putphaseisemployed,withwe... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6104.pdf | 1 |
487bae50-f2b8-4421-badc-530fdec883c7 | Start
Turn on RF system
Load setup file for
the HVPS voltage
Predict LLRF set
pointPinternal = Min( Puser,
Pinternal+Pstep)Set Pinterna l = 0Enable “Hold Modulator
and LLRF on
Raise
power/LLRF
range interruptIs
Perror < P allowed
& LLRF
limits
?
Wait
tsoak
Is P internal =
Poperator
?
Is
Perror < ΔPachieved... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6104.pdf | 2 |
4505f5e0-9f95-426a-bd40-e91e062ed943 | ingthehigher-orderapplicationsiftheirrequesttochange
the power or phase is still under processing, successfully
completed or has encountered an error and failed.
Figure 4: RF power ( 𝑃𝑅𝐹) response of TDC RF system,
highlighting acceptable power error ( Δ𝑃𝑎𝑙𝑙𝑜𝑤𝑒𝑑), and pre-
diction of LLRF setpoint.
Figure5: ... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6104.pdf | 2 |
f1c71782-d657-4435-a719-0e7b4f14ca61 | user experience.
CONCLUSION
A modular RF Application Programming Interface has
been successfully developed and deployed for RF system
control at CLARA. The system provides a robust, safe, and
operator-orientedframeworkthatabstractshardwarecom-
plexitywhilemaintaininghighperformanceandflexibility.
TheRF-APIenablesconsis... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6104.pdf | 2 |
ff7e1ed8-5882-4804-95f5-57caa61c031f | REFERENCES
[1]J. A. Clarke et al., “CLARA Conceptual Design Report”, J.
Instrum., vol. 9, no. 5, p. T05001, May. 2014.
doi:1/zero.alt4.1/zero.alt488/1748-/zero.alt4221/9//zero.alt45/T/zero.alt45/zero.alt4/zero.alt41
[2]D.Angal-Kalinin etal.,“Design,specifications,andfirstbeam
measurementsofthecompactlinearacceleratorfo... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6104.pdf | 3 |
815a41f4-a345-4657-b9d2-b26601d2c76c | tionsanalysis: mid-termupdate”,in Proc.IPAC’24 ,Nashville,
TN,May2024, pp. 400-403.
doi:1/zero.alt4.18429/JACoW-IPAC2/zero.alt424-MOPG55
[6]LiberaLLRFfromInstrumentationTechnologiesIndustries,
https://www.i-tech.si/products/libera-llrf/
[7]EPICScollaborationteam, https://www.epics-controls.
org
[8]M. King, B. Wilson et... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6104.pdf | 3 |
e61a9fe7-3f21-4520-9c89-e88bdf407900 | ISBN: 978-3-95450-252-3 ISSN: 2673-5350 doi: 10.18429/JACoW-IPAC2026-WEP6104
2788 MC6.T04: Accelerator/Storage Ring Control SystemsWEP6104 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\WEP6104.pdf | 3 |
63feb42c-cb43-4b07-bec0-9204a6023259 | VERTICAL EMITTANCE CONTROL USING
THE DLS-MBF TUNE PLL EXCITATION AT THE ESRF-EBS
B. Roche∗, N. Carmignani, L. Carver, F. Ewald, S. White
European Synchrotron Radiation Facility, Grenoble, France
Abstract
Since the beginning of the ESRF-EBS operation in 2020,
the storage ring has been routinely operated with an artifi-
... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6105.pdf | 0 |
a3d4b7be-1ddb-4d59-a347-3a7b32cda927 | Diamond Light Source, requires more careful tuning and
parameter adjustment but has demonstrated superior perfor-
mance at the ESRF compared to the previously used white-
noise excitation.
Inthispaper,wedescribetheimplementationoftheTune
PLLexcitationat theESRF and presentresults showingits
benefits in terms of beam li... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6105.pdf | 0 |
99e38416-46b3-4c83-99d0-d3cd930dd8e9 | corrections), routine user operation requires an artificial
increaseto10pm,20pm,or40pmdependingonthefilling
pattern, in order to achieve an optimal compromise between
beam lifetime and photon beam quality.
Operation at reduced chromaticity is being considered to
enableoperationwithsmallin-vacuumundulatorgaps[ 1].
Lower... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6105.pdf | 0 |
6bb3821d-7885-46fb-acbc-d78636efb833 | power drives coherent oscillations of the bunch centroid
rather than increasing the occupied phase-space area. To
address this limitation, the DLS-MBF Tune PLL method
∗benoit.roche@esrf.frwasinvestigatedasapromisingalternativeexcitationtech-
nique to improve blow-up efficiency, particularly under low-
chromaticity cond... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6105.pdf | 0 |
e9c5297c-e992-44ad-ad25-05e7165a88c1 | for a measured vertical emittance, and (ii) the stability of
the emittance over a wide range of timescales. Therefore, it
isimportantforthisstudytohavetheappropriatediagnostic
tools to measure both emittance and the beam lifetime with
good accuracy.
Theverticalemittanceismeasuredusingapinholecamera
system[5]. Thesystem... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6105.pdf | 0 |
6e0caff3-88c3-472d-9159-3268c192dd1b | ments.
DIAMOND MULTI-BUNCH FEEDBACK
TUNE PLL EXCITATION
The DLS-MBF system, developed at Diamond Light
Sourcein2017[ 6],isadigitalbunch-by-bunchfeedbackpro-
cessor providing advanced capabilities for transverse beam
stabilization and excitation. It was adopted at ESRF soon
after [7], replacing a previous in-house syste... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6105.pdf | 0 |
b13331c7-3f74-4122-ae0b-61b183f73aef | ISBN: 978-3-95450-252-3 ISSN: 2673-5350 doi: 10.18429/JACoW-IPAC2026-WEP6105
MC6.T05: Beam Feedback Systems 2789WEP: Poster session WEP6105
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 work, p... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6105.pdf | 0 |
2525d433-c125-4359-91df-78afff097457 | factors such as thermal variations, magnet vibrations, inser-
tiondevicegapchanges,theeffectofinjectionelementsand
operator-driven tune adjustments.
Parameter Adjustment
Followingthe same approachas Preston etal.[3],differ-
ent synchrotron sidebands of the betatron resonance were
investigated experimentally, along with... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6105.pdf | 1 |
d5c168b7-13ca-4353-9f3a-6f20698d1cd0 | and varies with operational conditions such as filling mode
and chromaticity [ 4]. At ESRF-EBS, the storage ring is
operated with relatively high chromaticity values, resulting
ina BTF with multiple well-definedsynchrotronsidebands
(Fig.1).
24Ampl. [a.u.]
0.30 0.32 0.34 0.36 0.38
tune0100Phase [deg.]
Figure 1: Vertical... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6105.pdf | 1 |
188b8b58-4ee6-4261-8a7e-02e545262a6f | synchrotronsidebandabovethebetatrontuneprovidesthe
best compromise, yielding an improvement in beam life-
timetogetherwithstableemittance. Excitationatthecentral
betatronpeakwasalsotestedandprovidesacceptableperfor-
mance,althoughless effectivethanthe sidebandexcitation.
This can be understood as a consequence of selec... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6105.pdf | 1 |
4e828c48-2fc2-4067-b241-3445b4d69104 | Table 1: Comparison of ExcitationMethods
Method Lifetime Emittance Stability
[h] [pm rms]
Noise 27.5 0.265
Tune PLL 29.5 0.058
Foracomparable measuredemittance,theTunePLLex-
citation provides a noticeably higher beam lifetime. This
indicates a more efficient transfer of excitation power into
incoherentmotion,withreduce... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6105.pdf | 1 |
782593df-a3a7-4d66-b430-5507a30cce2c | excitationpatternat 108.5Hz (thefrequenciesaredifferent
due to undersampling). This feature is absent when using
the Tune PLL, resulting in a significantlycleaner spectrum
and improved stability.
0 2 4 6
Frequency [Hz]105
104
103
102
101
100PSD [pm2/Hz]Noise excitation
Tune PLL excitation
Figure2: Comparison of emittan... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6105.pdf | 1 |
5c7d1a20-3957-4a57-b317-3b7b93979c04 | ISBN: 978-3-95450-252-3 ISSN: 2673-5350 doi: 10.18429/JACoW-IPAC2026-WEP6105
2790 MC6.T05: Beam Feedback SystemsWEP6105 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 work, p... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6105.pdf | 1 |
ac2e08e5-9c1b-4224-a56c-c44a26c4191f | 0 1 2 3 4 5 6
Time [days]0.02
0.01
0.000.01NCO Offset [tune unit]PLL NCO Offset
PLL NCO Ampl.
0.00.20.40.60.81.0
NCO Ampl. [a.u.]Figure 3: Evolution of the Tune PLL excitation parameters during user operation in uniform filling mode (between Nov. 4th
and Nov. 10th2025). The PLL NCO Offset (blue, left axis) represents t... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6105.pdf | 2 |
95b15b5d-7b7f-4a52-89d1-02a06f71c979 | transitions between different resonance peaks. In particular,
thesystemdriftedtowardthecentralbetatronpeak,which
becamethe dominant excitationfrequencyforextendedpe-
riods. Thesetransitionsresultedinobservable,albeitmod-
erate, variations in beam lifetime, reflecting the different
efficiency associated with each resona... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6105.pdf | 2 |
cfc46649-643c-4c13-b459-f698d166d293 | onancepeaksshowthattheBTFmayexperiencetransient
instabilities.
In addition, there are significant differences in the BTF
betweenfillingmodesduetocollectiveeffects. Thissensi-
tivity to machine conditions makes the identification of a
universally optimal excitation configuration challenging.
It should also be noted that... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6105.pdf | 2 |
12c86cc6-7a12-438e-924c-cb563219e701 | system provides a more efficient and selective method for
vertical emittance blow-up compared to conventional broad-
band noise excitation. It enables improved beam lifetime
and significantly enhanced emittance stability.However,thisapproachisalsomorecomplexandsensitive
tomachineconditions. Inparticular,thestabilityoft... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6105.pdf | 2 |
41d312b8-2923-409a-90ad-1b2973512c2e | pp. 973-976. doi:1/zero.alt4.18429/JACoW-IPAC2/zero.alt424-TUCN1
[2]N. Carmignani et al., “Emittance blow-up with a magnetic
shakeratdifferentchromaticities”,in Proc.IPAC’24 ,Nashville,
TN,USA,May2024, pp. 1274–1277.
doi:1/zero.alt4.18429/JACoW-IPAC2/zero.alt424-TUPG26
[3]S. Preston et al., “Measurements for Emittance ... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6105.pdf | 2 |
87a0f710-16ac-4ed7-9761-e45cf034c0bc | inProc. DIPAC’11 , Hamburg, Germany, May 2011, paper
MOPD61, pp. 188–190.
[6]M. G. Abbott et al., “A new transverse and longitudinal
bunch by bunch feedback processor”, in Proc. ICALEPCS’17 ,
Barcelona, Spain, Oct. 2017, pp. 1649–1654.
doi:1/zero.alt4.18429/JACoW-ICALEPCS2/zero.alt417-THPHA115
[7]B. Roche, “Experience ... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6105.pdf | 2 |
aeee7a12-dce1-4f02-b8e4-a53f045851b7 | ISBN: 978-3-95450-252-3 ISSN: 2673-5350 doi: 10.18429/JACoW-IPAC2026-WEP6105
MC6.T05: Beam Feedback Systems 2791WEP: Poster session WEP6105
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 work, p... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6105.pdf | 2 |
9d4a5a85-1af4-43aa-8ea6-d12e7d0f9ada | UPGRADE PLAN FOR THE ESRF FAST ORBIT FEEDBACK
M. Penot∗1, B. Roche1
1European Synchrotron Radiation Facility, Grenoble, France
Abstract
TheFastOrbitFeedback(FOFB)attheESRFwasinitially
developedin2010. Duringtheupgradeofthestoragering
for the Extremely Brilliant Source (EBS) project in 2019,
theFOFB architecturewas adap... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6106.pdf | 0 |
fe345cdb-6322-466a-a59a-5d89b6086c55 | positionmonitorssystemupgrades. Particularemphasisis
placedonlong-termmaintainabilitythroughtheadoptionof
modern software development methodologies and the use
of open-source or non-proprietary technologies as much as
possible.
INTRODUCTION
The FOFB system plays a crucial role in stabilizing
theelectronbeambycorrecting... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6106.pdf | 0 |
87f625dc-4140-487f-af31-963a0dcf622a | powersuppliesthroughRS422seriallinks[2]. Theoverall
system architecture is illustrated in Fig. 1.
Usinga200mAstorageringelectronbeamcurrent,the
FOFBefficientlyreducesorbitdisturbancesuptoapproxi-
mately 150 Hz in horizontally and 250 Hz vertically. Above
these frequencies, disturbances are amplified up to twice in
the4... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6106.pdf | 0 |
8d675b0a-77c8-41a3-8439-91b05efa7b3f | a 50 Hz notch filter for electrical perturbations.
A PI corrector can be interpreted as a pole (an integrator)
at the origin, which guarantees zero steady-state error for
stepreferenceinputs,sincetheintegratoraccumulatesany
persistent error until it is eliminated. The absence of the
derivativeterm,asimpliedpreviously,r... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6106.pdf | 0 |
8d046de6-4e73-4700-b73e-10d52332b80c | frequenciesisobservedbutcouldbefurtherreducedthrough
controller optimization. These frequency ranges can be im-
proved by adding a phase-lead compensator, and tuning the
PI corrector parameters to optimize its lower frequencies
performance and reduce its effect at higher ones.17th International Particle Accelerator Con... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6106.pdf | 0 |
d96c6497-be46-4cb3-965b-cf397ad1e89f | Figure 2: Horizontal (left) and vertical (right) spectrum measurements.
Phase-lead compensatorIntheFOFB,themainlimi-
tationistheachievablebandwidth. Aphase-leadcompen-
sator[3]increasesthephasemarginbyintroducingazero
andapole,withthezeroplacedatalowerfrequency( 𝑓𝑧𝑒𝑟𝑜)
thanthepole( 𝑓𝑝𝑜𝑙𝑒). Thisconfigurational... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6106.pdf | 1 |
c6632af5-e95a-4bec-8a1b-f2e3ea22c231 | continuous-time transfer function :
𝐾𝑙𝑒𝑎𝑑(𝑠)=1+𝑇𝑧𝑒𝑟𝑜·𝑠
1+𝑇𝑝𝑜𝑙𝑒·𝑠=1+𝑇𝑧𝑒𝑟𝑜·𝑠
1+𝛼·𝑇𝑧𝑒𝑟𝑜·𝑠
𝛼=𝑇𝑝𝑜𝑙𝑒
𝑇𝑧𝑒𝑟𝑜=1
2𝜋𝑓 𝑝𝑜𝑙𝑒
1
2𝜋𝑓 𝑧𝑒𝑟𝑜=𝑓𝑧𝑒𝑟𝑜
𝑓𝑝𝑜𝑙𝑒
The𝛼key parameter has to be tuned keeping in mind
the trade-off between the crossover frequency and the phase
margin and... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6106.pdf | 1 |
dc2d23c2-a89f-4bb6-b628-c746da49bb74 | period𝑇𝑠.When cascaded, the resulting controller takes the form of
a second-order IIR (biquad) filter:
𝐾𝑙𝑒𝑎𝑑(𝑧)=2Ö
𝑖=1𝐾𝑙𝑒𝑎𝑑,𝑖(𝑧)=𝐵0+𝐵 1𝑧−1+𝐵 2𝑧−2
1+𝐴 1𝑧−1+𝐴 2𝑧−2
With coefficients obtained by polynomial expansion of
the individual stages.
Simulations
SimulationsarecarriedoutusingSimulinkandPyth... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6106.pdf | 1 |
e609d116-65d4-4d94-a2e5-19b30e7971f2 | plane and𝑓 𝑐,1=𝑓𝑐,2≈1 kHz in the vertical plane.
Then a discrete-time model can be built to estimate the
sensitivityandstabilityofthePIcorrectorinserieswitha
phase-lead compensator as shown in Fig. 3.
Figure 3: FOFB control loop model.
TheMATLABControlSystemDesignertoolallowsthe
placement of poles and zeros on the ... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6106.pdf | 1 |
768c74bb-c6f1-48da-be38-f216bfd0f65c | (a) H. sensitivity simulation.
(b) H. sensitivity measurement.
(c) H. cumulative PSD measurement.
(d) V. sensitivity simulation.
(e) V. sensitivity measurement.
(f) V. cumulative PSD measurement.
Figure 4: Simulation and measurement results in horizontal (a, b, c) and vertical (d, e, f) planes.
increasing gain for ... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6106.pdf | 2 |
f1390234-787c-4586-92b2-c58a4f011d69 | Table 1 for the current FOFB and in Table 2 for the tested
version.
Table 2: Tested Corrector Parameters Values
Horizontal Vertical
𝐾𝑝[-] 0.46 0.135
𝐾𝐼[𝑠−1] 1642 1535
𝑓𝑧𝑒𝑟𝑜[Hz] 18 18
𝑓𝑝𝑜𝑙𝑒[Hz] 70 70
Gain [-] 0.26 0.28
Thefirstmeasurementsconfirmtheexpectedphasemar-
ginincrease. Indeed,themiddlecolumnofFi... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6106.pdf | 2 |
52608039-ff6a-4c71-abef-fcfabe827137 | migration to a modern platform.
FUTURE DEVELOPMENTS
Several hardware architectures are being evaluated, in-
cludingMicroTCA-basedsystems(similartothehardware
used at Soleil Synchrotron [5]) and standalone devices such
as White Rabbit switch developed at CERN. Trade-offs be-
tween ring, star, and torus topologies are al... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6106.pdf | 2 |
0bc730b8-3ee1-4b9a-869c-595cc54117cf | CONCLUSION
AcompleteESRF-EBSFOFBsystemupgradeiscurrently
being designed to improve performance and maintainabil-
ity. The introduction ofphase-lead compensationand bet-
terPItuningdemonstratedsignificantimprovementofthe
crossoverfrequencyandstabilitymargins. Ongoingsimu-
lations,measurementsandhardwarestudieswillguidet... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6106.pdf | 2 |
3a2c6e15-274f-46ed-9f45-afd84e65e4cf | ISBN: 978-3-95450-252-3 ISSN: 2673-5350 doi: 10.18429/JACoW-IPAC2026-WEP6106
2794 MC6.T05: Beam Feedback SystemsWEP6106 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 work, p... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6106.pdf | 2 |
2d82412a-9762-4f4a-a58c-618749fbcef2 | REFERENCES
[1]L.Torinoet al.,“OverviewontheDiagnosticsforEBS-ESRF”,
inProc. IBIC’19, Malmö, Sweden, Sep. 2019, pp. 9–13.
doi:10.18429/JACoW-IBIC2019-MOAO03
[2]E. Plouviez and F. Uberto, “The Orbit Correction Scheme
oftheNewEBSoftheESRF”,inProc. IBIC’16,Barcelona,
Spain, Sep. 2016, pp. 51–54.
doi:10.18429/JACoW-IBIC2016... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6106.pdf | 3 |
cc096ef0-8ae8-4a37-8934-4d66e9ed89f9 | ISBN: 978-3-95450-252-3 ISSN: 2673-5350 doi: 10.18429/JACoW-IPAC2026-WEP6106
MC6.T05: Beam Feedback Systems 2795WEP: Poster session WEP6106
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 work, p... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6106.pdf | 3 |
3b77c558-863b-43f6-af8d-7cd9478656de | STUDIES OF LONGITUDINAL BUNCH-BY-BUNCH
FEEDBACK FOR SOLEIL II
E. Kravishvili∗,1,2, Y.-M. Abiven1, M. El Ajjouri1, A. Gamelin1, V. Gubaidulin1,
R. Nagaoka1, J. Pham1, L. Zhao1, R. Sreedharan1, T. Nakamura3
1Synchrotron SOLEIL, Saint-Aubin, France
2Université Paris-Saclay, Gif-sur-Yvette, France
3High Energy Accelerator ... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6108.pdf | 0 |
4206e42c-4701-460f-9289-3e24285007fc | which may trigger complex LCBIs. The present study aims
todevelopanLFBsystemresponsibleforthelongitudinal
collectivestabilityofthe SOLEILII beam. The theoretical
calculationoftheinstabilitygrowthrateoftheHOMshas
beencarriedout,definingthepreliminaryperformancere-
quirementsoftheLFB.Amongthe threemainparts ofthe
system-... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6108.pdf | 0 |
e525058c-e179-4ae4-a123-341082e5ae7e | ring(seetherelatedSOLEILIIparametersinTable 1)[1,2].
Achievingsuchalowemittanceishighlychallenging,and
beam stability is therefore crucial. As to collective beam
stability, at present, SOLEIL operates only with TFB, [ 3–
5] since no LCBI has been observed so far. However, this
may not be the case for SOLEIL II. An LFB ... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6108.pdf | 0 |
3886ea5f-5fd0-473e-b441-aec39b50d3e6 | areas. First, it is necessary to investigate longitudinal coher-
entbeamdynamicsinSOLEILIIandidentifyallpossible
instabilities. Boththeoreticalandsimulation-basedstudies
mustbeperformedtodeterminewhichHOMsarepotentially
∗elene.kravishvili@synchrotron-soleil.frdangerous and to evaluate their corresponding growth rates.
... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6108.pdf | 0 |
667e994a-0f33-4192-9d3b-d7e62d295e31 | inthethirdpartofthepaper. Inthepresentstudy,weshall
notdescribethedigitalprocessors. Finally,oneofthekey
aspects of the system is the stabilization of the beam with
the correctly calculated and generated longitudinal kicks.
The SOLEIL II longitudinal kicker design is based on the
cavity developed at PSI for SLS 2.0 [ 1... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6108.pdf | 0 |
40cd885f-95cb-4b03-a175-4db78c570dea | groupwithpracticalexperienceinthelongitudinalfeedback
operation, which is not implemented at our facility. During
the experiment, two striplines from the existing TFB system
were used. One stripline was employed to longitudinally
excite the beam, while the second was used for the feedback
operation. For beam detection,... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6108.pdf | 0 |
1470744f-576c-4962-8a2e-c72578cce0f0 | ISBN: 978-3-95450-252-3 ISSN: 2673-5350 doi: 10.18429/JACoW-IPAC2026-WEP6108
2796 MC6.T05: Beam Feedback SystemsWEP6108 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 work, p... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6108.pdf | 0 |
1e2b7883-f499-4496-9b25-fb4d04a9e1ca | the prepared FIR coefficients separately. In the transverse
planesincethebetatronoscillationisveryfastonly5turn
dataare enough, howeverthe longitudinaloscillation takes
muchmoretime(thesynchrotrontuneis0.005),therefore,to
gathertherelevantinformationofbeambehavior,oneneeds
asmanyas200turndatapointsintheSOLEILring. Fort... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6108.pdf | 1 |
b66b05ea-7fc1-4336-bf14-77e640688e31 | right dotted line can either be positioned at the beginning,
the middle or at the end of the signal pass. The matching
of a kick and bunch location determines the effectiveness
of feedback. The three options were tested. The results
happened to show in this particular setting that when the
kickisappliedatthebeginningof... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6108.pdf | 1 |
70315475-33cf-4da0-b081-cf243bbd1eda | axis is signal amplitude.
HOMs STUDIES
The primary motivation forthe development of the FBL
systemisthemitigationofLCBIspossiblyexcitedbyHOMs
of the 4 main RF cavities. Table 2presents the most dan-
gerous modes which may drive LCBIs. To evaluate their
behavior,particularlytheirgrowthrates,boththeoreticaland
simulation... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6108.pdf | 1 |
2983378b-4422-48a7-9cd7-2d0d31be99b1 | chrotron sideband frequencies, where 𝑀is the number of
bunches,𝜇is the coupled-bunch mode number, 𝑛is the har-
monicindex,and 𝜔0istherevolutionangularfrequency[ 14].
ThecorrespondinganalyticalresultsarepresentedinTable 2.
Finding their instability growth rates will help us evaluate a
goodvalueofshuntimpedancerequir... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6108.pdf | 1 |
ae73d165-8549-45f8-9968-f9c3a4a7b7bc | 1.70 610 8826 324 2614
0.96 207 10710 277 3057
1.18 453 5337 162 5228
0.91 354 4340 98 864217th International Particle Accelerator Conference, Deauville, France JACoW Publishing
ISBN: 978-3-95450-252-3 ISSN: 2673-5350 doi: 10.18429/JACoW-IPAC2026-WEP6108
MC6.T05: Beam Feedback Systems 2797WEP: Poster session WEP6108
Co... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6108.pdf | 1 |
98301fbf-a875-4bc6-9fd0-b5db0002e221 | mbtrack2 Studies of HOM-induced LCBIs
Themaintoolusedforbeamtrackingis mbtrack2[15–
17]. WithitwecaninvestigateinstabilitiescausedbyHOMs,
aswellasthebeam’sbehaviorwithlongitudinalfeedback
inordertodeterminetheparametersrequiredtodampthe
excitation. Figure 4shows the evolution of the Courant–
Snyder invariant for a simu... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6108.pdf | 2 |
48ab34ee-a02e-4748-942d-760c85a6fe5e | SOLEIL II.
Figure4: SimulatedevolutionofthelongitudinalCourant-
Snyder invariant as a function of turn number in mbtrack2
for and unstable HOM case and the same case with longitu-
dinalfeedback(dampingrate211s−1). Blue: unstablebeam
withoutfeedback,green: beamdampedwithLFB,yellow:
exponential fit used to extract the in... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6108.pdf | 2 |
f4728423-8c2f-44cb-8192-21c65ef1e732 | response,oneshouldseeitstransferfunctionshowninEq. 2,
whosemagnitudeandphasecorrespondtothefeedbackgain
and phase, respectively. 𝑎𝑘are the FIR filter coefficients for
k-th previous turn position, 𝑁is the number of taps, |𝐻(𝜔)|
is the magnitude of the filter and 𝑎𝑟𝑔(𝐻(𝜔)) is the phase of
the filter.
𝐻(𝜔) =𝑁... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6108.pdf | 2 |
2194a50a-2b38-480d-9358-a91b79354077 | should be quite large to get the beam behavior during one
complete synchrotron oscillation. As the tap number in-
creases,thepeakoftheresponsefunctionbecomesnarrower.
However,the filterschemeprovidesflexibilityto shape the
responseaccordingtotherequirements,includingflattening
it by imposing conditions on higher-order ... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6108.pdf | 2 |
e50e80bb-c7f3-4a17-a363-340b37e26370 | machines. The original design was developed in Frascati
[11,12], while SLS 2.0 upgraded the kicker by introducing
the nose cones for more efficient kick and HOM dampers
which were not included in the original design [ 21]. This
design will serve as the basis for the SOLEIL II kicker.
CONCLUSION
The development of an LF... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6108.pdf | 2 |
26d11d9f-6597-4f79-b4d3-4ac4033c5749 | ISBN: 978-3-95450-252-3 ISSN: 2673-5350 doi: 10.18429/JACoW-IPAC2026-WEP6108
2798 MC6.T05: Beam Feedback SystemsWEP6108 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 work, p... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6108.pdf | 2 |
69a45e57-26e7-4bd6-9fb5-0e9e3d5283d1 | REFERENCES
[1]A.NadjiandL.S.Nadolski,“UpgradeProjectoftheSOLEIL
Accelerator Complex”, Synchrotron Radiat. News , vol. 36,
no. 1, pp. 10–15, 2023.
doi:1/zero.alt4.1/zero.alt48/zero.alt4//zero.alt4894/zero.alt4886.2/zero.alt423.2186661
[2]J. Susini et al., “A brief introduction to the Synchrotron
SOLEIL and its upgrade p... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6108.pdf | 3 |
d5886701-21d0-4a48-82ac-c473d10d4624 | Deauville,France,May2026,paperWEP5106,thisconfer-
ence.
[5]R.Nagaoka etal.,“Operationalstatusofthetransversebunch
by bunch feedback system at SOLEIL”, in Proc. IPAC’10 ,
Kyoto, Japan, May 2010, paper WEPEB029.
[6]A. Gamelin, V. Gubaidulin, M. B. Alves, and T. Olsson,
“Semianalytical algorithms to study longitudinal bea... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6108.pdf | 3 |
268d79e3-7ffa-4e3d-ba09-057498afe2e6 | Light Source”, in Proc. IPAC’17 , Copenhagen, Denmark,
May 2017, pp. 1947–1950.
doi:1/zero.alt4.18429/JACoW-IPAC2/zero.alt417-TUPIK114
[9]M. Lonza and H. Schmickler, “Multi-bunch feedback sys-
tems”,CERN,Geneva,Switzerland,CERNYellowReport
CERN-2014-009, 2016.
doi:1/zero.alt4.517/zero.alt4/CERN-2/zero.alt414-/zero.alt4... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6108.pdf | 3 |
087f179b-4542-4a1b-9932-57c61a36fd39 | der mode damping in particle accelerator RF cavities”, Part.
Accel., vol. 45, pp. 195–208, 1993.
[13]W. Bruns, “GdfidL: A Finite Difference Program with Re-
duced Memory and CPU Usage”,in Proc. PAC’97 , Vancou-
ver,Canada, May1997, paper 9P118, pp. 2651–2653.
[14]A. W. Chao, “Coherent instabilities of a relativistic bu... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6108.pdf | 3 |
730560eb-bd4b-4647-9205-3fd071c87c68 | [17]N.Yamamoto,A.Gamelin,andR.Nagaoka,“Investigationof
longitudinal beam dynamics with harmonic cavities by using
the code mbtrack”,in Proc.IPAC’19 , Melbourne, Australia,
May 2019, pp. 178–180.
doi:1/zero.alt4.18429/JACoW-IPAC2/zero.alt419-MOPGW/zero.alt439
[18]T.Nakamura,“Transverseand longitudinal bunch-by-bunch
fee... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6108.pdf | 3 |
74ea2212-d528-4ad0-8459-4d5f1158e2b7 | pp. 2649–2652.
[21]M.Dehler,G.Scrimali,M.Lonza,R.Fortunati,andS.Dorde-
vic,“FastkickersforbunchbybunchfeedbacksatSLS2.0
and ELETTRA”, in Proc. IPAC’23 , Venice, Italy, May 2023,
pp. 4817–4819.
doi:1/zero.alt4.18429/JACoW-IPAC2/zero.alt423-THPL14917th International Particle Accelerator Conference, Deauville, France JACo... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6108.pdf | 3 |
c019d7fb-7d08-4389-af28-33cc26c65390 | TEST BENCH DESIGN AND FIRST MEASUREMENT RESULTS FOR THE
PETRA IV FOFB ACTUATOR CHAIN
A. Amjad∗, H. Schlarb, S. H. Mirza, S. Pfeiffer
Deutsches Elektronen-Synchrotron, Hamburg, Germany
J. M. Christmann, Technical University of Darmstadt, Darmstadt, Germany
Abstract
A fast orbit feedback system is currently being develop... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6109.pdf | 0 |
e0a79c89-f51c-4994-a8ef-ac754ce4247f | field of corrector magnets are presented below. The subsys-
tems integration and combined frequency response of the
FOFB system will be measured in later stage of the project.
INTRODUCTION
The upcoming PETRAIV (a fourth-generation light
source) is being designed at DESY. One of the main con-
tributorstothebeamqualityin... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6109.pdf | 0 |
255ac183-6200-4859-b169-ac733a1ce070 | as well as the vacuum chamber under the fast correctors.
Themostcriticalsubsystemisthecorrectormagnetinterms
of both frequency response and field quality.
A test bench has been developed for the system identifica-
tionofFOFBsubsystemsinitiallyforprototypesandlater
to characterise the series production of the magnets. T... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6109.pdf | 0 |
aebff0ee-aa84-4f05-92f6-3f45e63d3213 | poweramplifiers,andcables. Theparasiticcapacitance
∗adeel.amjad@desy.de
Figure 1: Prototype magnet I.A.
effectofthecablesanditseffectontheoverallsignal
transfer to the magnet is important to be measured.
•Ahigh-resolution spatialmagnetic Hall probeto mea-
sure the position-dependent field as well as a search
coil for i... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6109.pdf | 0 |
b4eb2882-ac36-4ede-a29c-80cd1b7411eb | a special 8-pole design for both planes, ensuring better field
quality than a dipole geometry per plane, as confirmed by
simulations. The first prototype magnet (I.A) is shown in
Fig.1and differs from the final design in terms of yoke
material and lamination thickness; i.e., the yoke (86 mm in
length) is made of 1mm-th... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6109.pdf | 0 |
3d06c6ea-58ea-4ad9-bbcc-31aa09476276 | ISBN: 978-3-95450-252-3 ISSN: 2673-5350 doi: 10.18429/JACoW-IPAC2026-WEP6109
2800 MC6.T05: Beam Feedback SystemsWEP6109 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 work, p... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6109.pdf | 0 |
e7a35933-4db6-4778-a632-c409bc885bdc | Excitation and Measurement Instrument The Digilent
ADP3450isusedasaportable,high-resolutionmixed-signal
oscilloscope [ 2]. It combines a signal generator, an os-
cilloscope, digital inputs and outputs, and other measure-
ment tools in a compact system,making it ideal for testing,
analysingandgeneratingsignalsinelectron... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6109.pdf | 1 |
d2b3437c-e9a1-40bb-9193-dd1cc0e7a21e | a sensitivity of 250V/T. Anyhow, we used it only for DC
and low-frequency field measurements [ 3], as the magnet
generates a field below the sensor’s resolution for small-
signalexcitationathigherfrequenciesduetoeddy-current
effectsintheyoke. Thedifferentialoutputisused,effectively
extending the measurable range to ±80... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6109.pdf | 1 |
90303c2f-84af-4939-98fd-4276336d8475 | stageandenablesmeasuringthetransferfunctionuptohigh
frequency, but it loses position-dependent measurement, so
a combination of the two measurement setups helps to fully
characterisethesystem. The housingforthe coilshas been
designed in the CAD software and was 3D printed in-house.
CurrentSensor Themagnetcoilcurrentism... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6109.pdf | 1 |
ae315bc9-316f-4ced-b4ee-fafd0b0777c4 | appliedcoilvoltage,andR&S®HM8118LCRmeterwas
used for this purpose. To automate the frequency sweep, an
appropriate device is being procured.
3D Movable Stage The three-axis movable table provided
bytheDESY-MEAteamisusedforposition-dependentmea-
surements with the SENIS sensor. The stage is driven by
DC motors and provi... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6109.pdf | 1 |
78c37b3a-4f6f-4fbb-b126-5b235937b59c | nethasbeencharacterised. Hereweoutlinethreeexample
measurements. First,the LR measurement isperformed; it
isindependentofanyadditionalcomponentsinthemeasure-
ment circuit and serves as an initial check of the frequency-
dependent characteristic curve. The two additional mea-
surementsareperformedbytheDigilentADP3450,wh... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6109.pdf | 1 |
2b673970-c703-4d9d-a202-39661a0b7d08 | at each frequency step, which will be automated with a
new measurement device. Figure 3shows the frequency-
dependentLRmetermeasurementsforprototypeI.Amagnet
intherangeof20Hzto10kHz. Bothplanesshowalmost
identical frequency-dependent resistance and inductance, as
expected by design.
Scan Using Movable Stage
TheDCandlow... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6109.pdf | 1 |
282b331f-8d21-4dc6-b80d-8a378d070609 | ISBN: 978-3-95450-252-3 ISSN: 2673-5350 doi: 10.18429/JACoW-IPAC2026-WEP6109
MC6.T05: Beam Feedback Systems 2801WEP: Poster session WEP6109
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 work, p... | D:\Daily_ihep\Conferences\IPAC2026\WEP\WEP6109.pdf | 1 |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.