Keyword: insertion
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MOPAB002 Risk of Halo-Induced Magnet Quenches in the HL-LHC Beam Dump Insertion proton, collimation, betatron, operation 41
 
  • J.B. Potoine, A. Apollonio, E. Belli, C. Bracco, R. Bruce, M. D’Andrea, R. García Alía, A. Lechner, G. Lerner, S. Morales Vigo, S. Redaelli, V. Rizzoglio, E. Skordis, A. Waets
    CERN, Meyrin, Switzerland
  • F. Wrobel
    IES, Montpellier, France
  
  Funding: Research supported by the HL-LHC project
After the High Lu­mi­nos­ity (HL-LHC) up­grade, the LHC will be ex­posed to a higher risk of mag­net quenches dur­ing pe­ri­ods of short beam life­time. Col­li­ma­tors in the ex­trac­tion re­gion (IR6) as­sure the pro­tec­tion of mag­nets against asyn­chro­nous beam dumps, but they also in­ter­cept a frac­tion of the beam halo leak­ing from the be­ta­tron clean­ing in­ser­tion. In this paper, we as­sess the risk of quench­ing nearby quadrupoles dur­ing beam life­time drops. In par­tic­u­lar, we pre­sent an em­pir­i­cal analy­sis of halo losses in IR6 using LHC Run 2 (2015-2018) beam loss mon­i­tor mea­sure­ments. Based on these re­sults, the halo-in­duced power den­sity in mag­net coils ex­pected in HL-LHC is es­ti­mated using FLUKA Monte Carlo shower sim­u­la­tions. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB002  
About • paper received ※ 19 May 2021       paper accepted ※ 13 July 2021       issue date ※ 22 August 2021  
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MOPAB012 Energy Deposition Study of the CERN HL-LHC Optics v1.5 in the ATLAS and CMS Insertions luminosity, proton, optics, radiation 76
 
  • M. Sabaté-Gilarte, F. Cerutti
    CERN, Meyrin, Switzerland
  
  Funding: Research supported by the HL-LHC project
The High Lu­mi­nos­ity Large Hadron Col­lider (HL-LHC) is the ap­proved CERN pro­ject aim­ing at fur­ther in­creas­ing the in­te­grated lu­mi­nos­ity of the LHC by a fac­tor 10. As such, it im­plies a com­plete re­design of the ex­per­i­men­tal high-lu­mi­nos­ity in­ser­tions of ATLAS and CMS. The pro­gres­sive evo­lu­tion of the new lay­out and op­tics re­quires a con­tin­u­ous analy­sis of the ra­di­a­tion en­vi­ron­ment, to which mag­nets and other equip­ment are ex­posed to. This is as­sured by means of Monte Carlo sim­u­la­tions of the col­li­sion de­bris on the evolv­ing ma­chine model. The lat­ter fea­tured sev­eral de­vel­op­ments, such as the ex­plicit in­clu­sion of the cold pro­tec­tion diodes of the final fo­cus­ing cir­cuits as well as the crab cav­i­ties cry­omod­ule. This work pre­sents the most up­dated char­ac­ter­i­za­tion of the ra­di­a­tion field with FLUKA and its im­pact in the in­ser­tion re­gion and the dis­per­sion sup­pres­sor of Point 1 and 5, for the HL-LHC op­tics v1.5 re­leased in 2019. Var­i­ous op­ti­miza­tion and mit­i­ga­tion stud­ies are high­lighted, pro­vid­ing key in­for­ma­tion for max­i­miz­ing the life­time of new and pre­sent mag­nets. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB012  
About • paper received ※ 18 May 2021       paper accepted ※ 25 May 2021       issue date ※ 21 August 2021  
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MOPAB084 Acceptance Tests and Installation of the IVU and Front End for the XAIRA Beamline of ALBA undulator, photon, vacuum, experiment 318
 
  • J. Campmany, J. Marcos, V. Massana
    ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
  
  XAIRA is a new beam­line being built at ALBA syn­chro­tron for macro­mol­e­c­u­lar crys­tal­log­ra­phy (MX) de­voted to the study of small bio crys­tals. It aims at pro­vid­ing a full beam with a size of 3x1 µm2 FWHM (hxv) and flux of >3·1012 ph/s (250 mA in Stor­age Ring) at 1 Å wave­length (12.4 keV) to tackle MX pro­jects for which only tiny (<10 μm) or im­per­fect crys­tals are ob­tained. Be­sides, XAIRA aims at pro­vid­ing pho­tons at low en­er­gies, down to 4 keV, to sup­port MX ex­per­i­ments ex­ploit­ing the anom­alous sig­nal of the met­als nat­u­rally oc­cur­ring in pro­teins (na­tive phas­ing), which is en­hanced in the case of small crys­tals and long wave­lengths. To this end, an in-vac­uum un­du­la­tor has been built by a con­sor­tium be­tween Kyma and Re­search In­stru­ments com­pa­nies. In this paper, we pre­sent the re­sults of the Site Ac­cep­tance Tests made at ALBA using a new bench de­vel­oped to mea­sure closed struc­tures, and also the steps done for its in­stal­la­tion in the ALBA tun­nel.  
poster icon Poster MOPAB084 [1.715 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB084  
About • paper received ※ 11 May 2021       paper accepted ※ 20 May 2021       issue date ※ 25 August 2021  
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MOPAB085 Design and Fabrication of a Short Multipole Wiggler and the Front End for the New ALBA Beamline FAXTOR photon, wiggler, vacuum, insertion-device 321
 
  • J. Campmany, J. Marcos, V. Massana
    ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
  
  FAX­TOR is a new hard XR to­mog­ra­phy beam line that is being built at ALBA in order to ful­fil the needs that can­not be cur­rently cov­ered by the MIS­TRAL VUV and soft XR beam­line. This beam line needs a small source size as well higher than 1012 Pho­tons per sec­ond through an aper­ture of 4x1 mm2 in the whole range 5 to 60 keV, for a cur­rent of 250 mA in Stor­age Ring with source size main­tained below 310 µm hor­i­zon­tal and 25 µm ver­ti­cal. The con­tract was awarded to AVS-US Com­pany. In this paper we pre­sent the de­sign fi­nally se­lected as well as the pre­lim­i­nary de­sign car­ried out by man­u­fac­turer to im­ple­ment the con­cep­tual model de­signed by ALBA.  
poster icon Poster MOPAB085 [1.879 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB085  
About • paper received ※ 11 May 2021       paper accepted ※ 20 May 2021       issue date ※ 31 August 2021  
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MOPAB086 Design of Front End and a 3-Pole-Wiggler as a Photon Source for BEATS Beamline at SESAME photon, wiggler, vacuum, synchrotron 324
 
  • J. Campmany, J. Marcos
    ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
  • M. Al Nadjawi, M. Attal, G. Lori
    SESAME, Allan, Jordan
  • I. Cudin
    Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
  • S. Guiducci
    INFN/LNF, Frascati, Italy
  • P. Van Vaerenbergh
    ESRF, Grenoble, France
  
  BEATS is an in­ter­na­tional col­lab­o­ra­tion funded by EU in order to de­sign and im­ple­ment an XR to­mog­ra­phy beam line in SESAME Jor­dan­ian syn­chro­tron. ALBA con­tri­bu­tion con­sists in the de­sign of the pho­ton source and the Front End el­e­ments. In this paper we pre­sent the con­cep­tual de­signs of both the 3-pole wig­gler uses as pho­ton source as well as the Front End el­e­ments de­signed for the beam­line.  
poster icon Poster MOPAB086 [2.306 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB086  
About • paper received ※ 11 May 2021       paper accepted ※ 21 May 2021       issue date ※ 17 August 2021  
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MOPAB090 Status of HEPS Insertion Devices Design undulator, photon, radiation, wiggler 339
 
  • X.Y. Li, Y. Jiao, H.H. Lu, S.K. Tian
    IHEP, Beijing, People’s Republic of China
  
  HEPS is a 4th gen­er­a­tion light source with the en­ergy of 6 GeV and ul­tralow emit­tance of 34 pm.​rad. A total of 14 beam­lines with 19 in­ser­tion de­vices has been planned in the first phase, in­clud­ing 6 cryo­genic un­du­la­tors, 5 in-vac­uum un­du­la­tors, and two spe­cial non-pla­nar IDs. The schemes and pa­ra­me­ters of all the IDs are planned to be de­ter­mined in this year. We re­port on the sta­tus of the de­sign of these IDs and their ef­fects on beam dy­nam­ics.  
poster icon Poster MOPAB090 [0.633 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB090  
About • paper received ※ 13 May 2021       paper accepted ※ 01 July 2021       issue date ※ 10 August 2021  
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MOPAB258 Corrections of Non-Linear Field Errors with Asymmetric Optics in LHC and HL-LHC Insertion Regions optics, simulation, hadron, collider 817
 
  • J. Dilly, E.H. Maclean, R. Tomás García
    CERN, Geneva, Switzerland
  
  Funding: Research supported by the HL-LHC project, CERN and the german Federal Ministry of Education and Research.
Ex­ist­ing cor­rec­tion schemes to lo­cally sup­press res­o­nance dri­ving terms in the er­ror-sen­si­tive high-beta re­gions of the LHC and HL-LHC have op­er­ated on the as­sump­tion of sym­met­ric beta-func­tions of the op­tics in the two rings. As this as­sump­tion can fail for a mul­ti­tude of rea­sons, such as in­her­ently asym­met­ric op­tics and un­evenly dis­trib­uted er­rors, an ex­ten­sion of this cor­rec­tion scheme has been de­vel­oped re­mov­ing the need for sym­me­try by op­er­at­ing on the two sep­a­rate op­tics of the beams at the same time. Pre­sented here is the im­pact of this novel ap­proach on dy­namic aper­ture as an im­por­tant mea­sure of par­ti­cle sta­bil­ity. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB258  
About • paper received ※ 10 May 2021       paper accepted ※ 23 July 2021       issue date ※ 16 August 2021  
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MOPAB259 Corrections of Feed-Down of Non-Linear Field Errors in LHC and HL-LHC Insertion Regions optics, simulation, hadron, collider 821
 
  • J. Dilly, E.H. Maclean, R. Tomás García
    CERN, Geneva, Switzerland
  
  Funding: Research supported by the HL-LHC project, CERN and the german Federal Ministry of Education and Research.
The op­tics in the in­ser­tion re­gions of the LHC and its up­grade pro­ject the High Lu­mi­nos­ity LHC (HL-LHC) are very sen­si­tive to local mag­netic er­rors, due to the ex­tremely high beta-func­tions pre­sent. In col­li­sion op­tics, the non-zero closed orbit in the same re­gion leads to a "feed-down" of high-or­der er­rors to lower or­ders, caus­ing ad­di­tional ef­fects detri­men­tal to beam life­time. An ex­ten­sion to the proven method for cor­rect­ing these er­rors by lo­cally sup­press­ing res­o­nance dri­ving terms has been un­der­taken, not only tak­ing this feed-down into ac­count, but also adding the pos­si­bil­ity of uti­liz­ing it such that the pow­er­ing of higher-or­der cor­rec­tors will com­pen­sate for lower order er­rors. The im­pact of these cor­rec­tions on mea­sures of par­ti­cle sta­bil­ity, namely dy­namic aper­ture and am­pli­tude de­tun­ing are pre­sented in this con­tri­bu­tion. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB259  
About • paper received ※ 10 May 2021       paper accepted ※ 23 July 2021       issue date ※ 15 August 2021  
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MOPAB320 The CMS ECAL Enfourneur: A Gigantic Machine with a Soft Touch operation, controls, alignment, experiment 986
 
  • V. Pettinacci
    INFN-Roma, Roma, Italy
  
  The elec­tro­mag­netic calorime­ter (ECAL) of the CMS ex­per­i­ment at the LHC is com­posed of 75848 scin­til­lat­ing lead tungstate crys­tals arranged in a bar­rel sec­tion and two end­caps. The bar­rel part is made of 36 su­per­mod­ules (SM), 2.7 tons each, and is in­stalled in­side the CMS mag­net. There are 18 SMs on each side of CMS, with each SM con­tain­ing 1700 crys­tals. Dur­ing Long Shut­down 3, all ECAL SMs must be ex­tracted to re­fur­bish the elec­tron­ics in prepa­ra­tion for HL-LHC. A ded­i­cated ma­chine called the "En­fourneur" is used to ex­tract and re-in­sert the SMs in­side CMS, with a re­quired ac­cu­racy of about 1mm. In order to speed up the ex­trac­tion and in­ser­tion process, two En­fourneurs will be em­ployed, op­er­at­ing in par­al­lel on both sides. In view of the pur­chase of the sec­ond En­fourneur, the de­sign has been im­proved, start­ing from the feed­back of past op­er­a­tions. The im­prove­ments to the new En­fourneur de­sign in­clude in­creased space for the op­er­a­tors, op­ti­miza­tion of the op­er­a­tions and the con­trols with the use of elec­tric mo­tors, and an up­dated align­ment sys­tem. Han­dling plans in­side the CMS cav­ern have been de­fined in order to be com­pli­ant with the rest of CMS struc­tures and pro­ce­dures.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB320  
About • paper received ※ 11 May 2021       paper accepted ※ 17 August 2021       issue date ※ 20 August 2021  
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MOPAB350 RF Buncher Cavity for Polarized He-3 Beam at BNL cavity, simulation, alignment, booster 1090
 
  • T. Kanesue, S.M. Trabocchi
    BNL, Upton, New York, USA
  • A. Murata
    TIT, Tokyo, Japan
  
  Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-SC0012704 with the U.S. Department of Energy.
A 100.625 MHz quar­ter wave res­onator type rf buncher cav­ity was fab­ri­cated for po­lar­ized He-3 spin ro­ta­tor beam line at BNL. This cav­ity will be in­stalled in the ex­ist­ing EBIS-To-Booster beam line to pro­vide ef­fec­tive volt­age of more than 40 kV for 2 MeV/u 3He2+ beam. This cav­ity has a large drift tube inner di­am­e­ter of 80 mm and small gap length of 5 mm. The buncher con­sists of 3 sec­tions, which are a cav­ity main body in­clud­ing drift tube, stem, and inner wall, a lid with a power cou­pler, and a lid with an in­duc­tive tuner. The main body was ma­chined from a bulk cop­per only by CNC ma­chin­ing. The re­sult of low power test agreed well with rf sim­u­la­tion with­out any align­ment. The dif­fer­ence be­tween mea­sured and cal­cu­lated res­o­nant fre­quency was <0.1 %, and mea­sured Q value was 92 % of that in sim­u­la­tion. The cav­ity rf de­sign and test re­sults will be shown. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB350  
About • paper received ※ 26 May 2021       paper accepted ※ 28 May 2021       issue date ※ 12 August 2021  
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TUPAB016 ESS RFQ: Installation and Tuning at Lund rfq, quadrupole, coupling, cavity 1372
 
  • P. Hamel, D. Chirpaz-Cerbat, M. Desmons, A.C. France, O. Piquet
    CEA-IRFU, Gif-sur-Yvette, France
  • A. Dubois, Y. Le Noa
    CEA-DRF-IRFU, France
  
  The 352 MHz Radio Fre­quency Quadru­pole (RFQ) for the Eu­ro­pean Spal­la­tion Source ERIC (ESS) has been de­liv­ered by the end of 2019. It has been pro­vided by CEA, IRFU, Saclay/France. It con­sists of five sec­tions with a total length of 4.6 m and ac­cel­er­ates the 70 mA pro­ton beam from 75 keV up to 3.6 MeV. It will be fed with 900 kW peak power through two coax­ial loop cou­plers. The in­stal­la­tion process (align­ment, vac­uum test), as well as the tun­ing process based on bead-pull mea­sure­ments, is pre­sented in this paper.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-TUPAB016  
About • paper received ※ 18 May 2021       paper accepted ※ 06 July 2021       issue date ※ 14 August 2021  
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TUPAB042 Large Radial Shifts in the EIC Hadron Storage Ring dipole, hadron, closed-orbit, electron 1443
 
  • S. Peggs, J.S. Berg, K.A. Drees, X. Gu, C. Liu, H. Lovelace III, Y. Luo, G.J. Marr, A. Marusic, F. Méot, R.J. Michnoff, V. Ptitsyn, G. Robert-Demolaize, M. Valette, S. Verdú-Andrés
    BNL, Upton, New York, USA
  • K.E. Deitrick
    Cornell University (CLASSE), Cornell Laboratory for Accelerator-Based Sciences and Education, Ithaca, New York, USA
  • B.R. Gamage
    JLab, Newport News, Virginia, USA
  
  Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-SC0012704 with the U.S. Department of Energy.
The Elec­tron Ion Col­lider will col­lide hadrons in the Hadron Stor­age Ring (HSR) with ul­tra-rel­a­tivis­tic elec­trons in the Elec­tron Stor­age Ring. The HSR de­sign tra­jec­tory in­cludes a large ra­dial shift over a large frac­tion of its cir­cum­fer­ence, in order to ad­just the hadron path length to syn­chro­nize col­li­sions over a broad range of hadron en­er­gies. The de­sign tra­jec­tory goes on-axis through the mag­nets, crab cav­i­ties and other com­po­nents in the six HSR In­ser­tion Re­gions. This paper dis­cusses the is­sues in­volved and re­ports on past and fu­ture beam ex­per­i­ments in the Rel­a­tivis­tic Heavy Ion Col­lider, which will be up­graded to be­come the HSR. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-TUPAB042  
About • paper received ※ 18 May 2021       paper accepted ※ 15 June 2021       issue date ※ 21 August 2021  
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TUPAB051 Elettra and Elettra 2.0 emittance, insertion-device, status, coupling 1474
 
  • E. Karantzoulis, A. Carniel, D. Castronovo, S. Di Mitri, B. Diviacco, S. Krecic
    Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
  
  The sta­tus of the Ital­ian 2.4/2.0 GeV third gen­er­a­tion light source Elet­tra is pre­sented to­gether with the fu­ture up­grade con­cern­ing the new ul­tra-low emit­tance light source Elet­tra 2.0 that will pro­vide ul­tra-high bril­liance while the very short pulses fea­si­bil­ity study for time re­solved ex­per­i­ments is in progress.  
poster icon Poster TUPAB051 [1.632 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-TUPAB051  
About • paper received ※ 10 May 2021       paper accepted ※ 27 May 2021       issue date ※ 20 August 2021  
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WEPAB127 Accurate Measurements of Undulator Particle Beam Entrance/Exit Angles Using Improved Hall Probes and Calibration Process undulator, photon, insertion-device, closed-orbit 2907
 
  • I. Vasserman, R.J. Dejus, Y. Piao, M.F. Qian, J.Z. Xu
    ANL, Lemont, Illinois, USA
  
  Funding: Work supported by U.S. Department of Energy, Office of Science, under contract number DE-AC02-06CH11357.
The Ad­vanced Pho­ton Source Up­grade (APS-U) un­du­la­tor re­quire­ments were changed from the first and sec­ond field in­te­grals to the en­trance and exit an­gles of the par­ti­cle beam. This pro­vides the user with the best ra­di­a­tion view angle by the stor­age ring closed orbit cor­rec­tion sys­tem. To sat­isfy such re­quire­ments we use im­proved Senis Hall probes and cal­i­bra­tion process. In ad­di­tion to the nor­mal NMR cal­i­bra­tion of the sen­sors, the cal­i­bra­tion was fur­ther re­fined using stretch-coil in­te­grals to make ac­cu­rate mea­sure­ments. 		 
poster icon Poster WEPAB127 [0.620 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB127  
About • paper received ※ 15 May 2021       paper accepted ※ 09 June 2021       issue date ※ 19 August 2021  
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WEPAB148 RF Design of an X-Band TM02 Mode Cavity for Field Emitter Testing cavity, electron, coupling, multipactoring 2961
 
  • Z. Li, S.G. Tantawi
    SLAC, Menlo Park, California, USA
  • S.V. Baryshev, T. Posos, M.E. Schneider
    Michigan State University, East Lansing, Michigan, USA
  
  Funding: Work at SLAC was supported by DOE under contract No. DE-AC02-76SF00515. Work at MSU was supported by DOE under Award No. DE-SC0020429 and under Cooperative Agreement Award No. DE-SC0018362.
Pla­nar poly­crys­talline syn­thetic di­a­mond with ni­tro­gen-dop­ing/in­cor­po­ra­tion was found to be a re­mark­able field emit­ter. It is ca­pa­ble of gen­er­at­ing a high charge beam and han­dling mod­er­ate vac­uum con­di­tions. In­te­grat­ing it with an ef­fi­cient RF cav­ity could there­fore pro­vide a com­pact elec­tron source for RF in­jec­tors. Un­der­stand­ing the per­for­mance met­rics of the emit­ter in RF fields is es­sen­tial to­ward de­vel­op­ing such a de­vice. We in­ves­ti­gated a test setup of the field emit­ter at the X-band fre­quency. The setup in­cluded an X-band cav­ity op­er­at­ing at the TM02 mode. The field emit­ter ma­te­r­ial will be plated on the tip of a in­ser­tion rod on the cav­ity back plate. Part of the back plate and the emit­ter rod are de­mount­able, al­low­ing for ex­change of the field emit­ters. The TM02 mode was cho­sen such that the de­sign of the de­mount­able back plate does not in­duce field en­hance­ment at the in­stal­la­tion gap. The cav­ity were op­ti­mized to achieve a high sur­face field at the emit­ter tip and a max­i­mum en­ergy gain of the emit­ted elec­trons at a given input power. We will pre­sent the RF and me­chan­i­cal de­sign of such a TM02 X-band cav­ity for field emit­ter test­ing. 		 
poster icon Poster WEPAB148 [1.642 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB148  
About • paper received ※ 14 May 2021       paper accepted ※ 12 July 2021       issue date ※ 12 August 2021  
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WEPAB279 On Wire-Corrector Optimization in the HL-LHC and the Appearance of Special Aspect Ratios target, optics, coupling, resonance 3297
 
  • D. Kaltchev
    TRIUMF, Vancouver, Canada
  
  For the two high-lu­mi­nos­ity in­ser­tions of the Large Hadron Col­lider (HL-LHC) cur­rent bear­ing wire cor­rec­tors are in­tended to mit­i­gate the detri­men­tal ef­fect of long-range beam-beam in­ter­ac­tions. With re­spect to find­ing the op­ti­mum lon­gi­tu­di­nal lo­ca­tion of the wire, two spe­cial lo­ca­tions cor­re­spond­ing to the spe­cial val­ues 2 and 1/2 of the beta-func­tion as­pect ratio have been pre­vi­ously shown to pro­vide si­mul­ta­ne­ous can­cel­la­tion of mul­ti­ple two-di­men­sional Res­o­nance Dri­ving Terms. This paper at­tempts to ex­plain the ap­pear­ance of such spe­cial as­pect ra­tios.  
poster icon Poster WEPAB279 [1.238 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB279  
About • paper received ※ 14 May 2021       paper accepted ※ 19 July 2021       issue date ※ 13 August 2021  
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WEPAB301 Design of an X-Band LLRF System for TEX Test Facility at LNF-INFN LLRF, cavity, klystron, GUI 3371
 
  • L. Piersanti, D. Alesini, M. Bellaveglia, S. Bini, B. Buonomo, F. Cardelli, C. Di Giulio, M. Diomede, A. Falone, G. Franzini, A. Gallo, A. Liedl, S. Pioli, S. Quaglia, L. Sabbatini, M. Scampati, G. Scarselletta, A. Stella
    INFN/LNF, Frascati, Italy
  
  Funding: Latino is a project co-funded by Regione Lazio within POR-FESR 2014-2020 program
In the frame­work of LATINO pro­ject (Lab­o­ra­tory in Ad­vanced Tech­nolo­gies for IN­nO­va­tion) funded by Lazio re­gional gov­ern­ment, a TEst stand for X-band (TEX) is being com­mis­sioned at Fras­cati Na­tional Lab­o­ra­to­ries (LNF) of INFN. TEX is born as a col­lab­o­ra­tion with CERN, aimed at car­ry­ing out high power tests of X-band ac­cel­er­at­ing struc­ture pro­to­types and wave­guide com­po­nents, and it is of para­mount im­por­tance in view of the con­struc­tion of EuPRAXIA@​SPARC_​LAB fa­cil­ity at LNF. In order to gen­er­ate, ma­nip­u­late and mea­sure the RF pulses needed to feed the RF power unit (solid state Scan­di­Nova K400 mod­u­la­tor, CPI 50 MW 50 Hz kly­stron) an X-band low level RF sys­tem has been de­vel­oped, mak­ing use of a com­mer­cial S-band (2.856 GHz) Lib­era dig­i­tal LLRF (man­u­fac­tured by In­stru­men­ta­tion Tech­nolo­gies) with a newly de­signed up/down con­ver­sion stage and a ref­er­ence gen­er­a­tion/dis­tri­b­u­tion sys­tem, which is able to pro­duce co­her­ent ref­er­ence fre­quen­cies for the Amer­i­can S-band (2.856 GHz) and Eu­ro­pean X-band (11.994 GHz). In this paper the main fea­tures of such sys­tems will be re­viewed to­gether with pre­lim­i­nary lab­o­ra­tory mea­sure­ment re­sults. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB301  
About • paper received ※ 19 May 2021       paper accepted ※ 12 July 2021       issue date ※ 27 August 2021  
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WEPAB320 RecCeiver-ETCD: A Bridge Between ETCD and ChannelFinder EPICS, operation, status, database 3424
 
  • G. Jhang, T. Ashwarya, A. Carriveau
    FRIB, East Lansing, Michigan, USA
  
  Funding: Work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661
Man­ag­ing EPICS Process Vari­ables’~(PVs) meta­data, such as the host and the con­tact, is one of the im­por­tant tasks for the op­er­a­tion of large-scale ac­cel­er­a­tor fa­cil­i­ties with min­i­mal down­time. Record Sy­chro­nizer~(Rec­Sync) pro­vides a way to man­age such cru­cial in­for­ma­tion in an EPICS In­put-Out­put Con­troller~(IOC). Rec­Ceiver-ETCD is the server com­po­nent of the Rec­Sync-ETCD, or an ex­ten­sion of Rec­Ceiver for ETCD. In the pre­vi­ous work, the client com­po­nent of Rec­Sync, or Rec­Ca­ster, has been ex­tended to Rec­Ca­ster-ETCD to store the meta­data into an ETCD key-value store. An im­por­tant re­main­ing step to the pro­duc­tion use is to in­tro­duce a con­nec­tion be­tween ETCD and Chan­nelFinder, which is achieved by Rec­Ceiver in the Rec­Sync sys­tem. Rec­Ceiver-ETCD plays the role of the orig­i­nal Rec­Ceiver in the Rec­Sync-ETCD sys­tem. Rec­Ceiver-ETCD is de­signed to per­form the spe­cific op­er­a­tion, bridg­ing the com­mu­ni­ca­tion be­tween ETCD and Chan­nelFinder. In ad­di­tion, its sim­ple im­ple­men­ta­tion does not hold it down to Chan­nelFinder and makes it easy to ex­tend Rec­Ceiver-ETCD out to the other ap­pli­ca­tions. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB320  
About • paper received ※ 11 May 2021       paper accepted ※ 19 July 2021       issue date ※ 17 August 2021  
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THXB05 Inverse Orbit Response Matrix Measurements: A Possible On-Line Tool for Optics Control in Storage Rings quadrupole, optics, operation, storage-ring 3724
 
  • Z. Martí, G. Benedetti, U. Iriso, E. Morales
    ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
  
  We pro­pose a novel tech­nique to mea­sure the lin­ear op­tics in stor­age rings based on the ac­qui­si­tion of the in­verse orbit re­sponse ma­trix (iORM). The iORM con­sists in the orbit cor­rec­tors mag­nets (OCM) strength changes needed to pro­duce a local orbit vari­a­tion in each beam po­si­tion mon­i­tor (BPM). This mea­sure­ment can be im­ple­mented by in­tro­duc­ing se­quen­tially small changes in the BPM off­sets and log­ging the OCM set­ting vari­a­tions when the orbit cor­rec­tion is run­ning. Very high pre­ci­sion and ac­cu­racy in the OCM set-points is re­quired which poses a con­sid­er­able chal­lenge. Since the orbit feed­back (FOFB) is kept run­ning, the iORM could po­ten­tially be ac­quired in par­al­lel to users stor­age ring op­er­a­tion. Since the iORM is very lin­ear and local, op­tics per­tur­ba­tions could be eas­ily di­ag­nosed on­line. This paper in­tro­duces the iORM mea­sure­ment con­cept and pre­sents the progress of these stud­ies at ALBA, where the im­ple­men­ta­tion of this tech­nique is lim­ited by hys­tere­sis ef­fects in the OCM and the FOFB per­for­mance.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-THXB05  
About • paper received ※ 19 May 2021       paper accepted ※ 29 July 2021       issue date ※ 12 August 2021  
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THPAB037 Insertion Devices Impact on Solaris Storage Ring Optics undulator, insertion-device, power-supply, storage-ring 3827
 
  • G.W. Kowalski, R. Panaś, A.I. Wawrzyniak
    NSRC SOLARIS, Kraków, Poland
  
  So­laris stor­age ring is cur­rently op­er­at­ing with three in­ser­tion de­vices. The IDs in­stalled are the APPLE II type el­lip­ti­cally po­larised un­du­la­tors (EPU). The UARPES beam­line is op­er­at­ing with the long pe­riod length EPU of 120 mm (EPU120) which has a sig­nif­i­cant im­pact on the lin­ear op­tics and tune shift. The lin­ear op­tics com­pen­sa­tion of the EPU120 im­pact is re­alised by local ad­just­ment of SQFO quadru­pole/sex­tu­pole fo­cus­ing gra­di­ent and de­fo­cus­ing gra­di­ent in the flank­ing dipoles. Two ad­di­tional EPUs with pe­riod lengths of 58 and 46.6 mm are re­cently in­stalled for next beam­lines PHE­LIX and DEME­TER, re­spec­tively and are under com­mis­sion­ing now. To re­duce the im­pact of all un­du­la­tors move­ment the ad­di­tional cor­rec­tion coils are in­stalled and the cor­rec­tion feed­for­ward ta­bles has been de­ter­mined ex­per­i­men­tally. Ad­di­tion­ally to keep the tune at the nom­i­nal val­ues the tune feed­back is planned to be im­ple­mented. Within this pre­sen­ta­tion the ef­fect of all ex­ist­ing in­ser­tion de­vices on the lin­ear op­tics based on mea­sure­ments and sim­u­la­tions to be dis­cussed. More­over the non­lin­ear ef­fects, es­pe­cially the im­pact on dy­namic aper­ture of So­laris stor­age ring will be in­ves­ti­gated.  
poster icon Poster THPAB037 [2.522 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-THPAB037  
About • paper received ※ 18 May 2021       paper accepted ※ 14 July 2021       issue date ※ 30 August 2021  
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THPAB047 Status of Magnetic Measurement Benches for Insertion Device Characterization at MAX IV Laboratory undulator, insertion-device, quadrupole, MMI 3848
 
  • M. Ebbeni, M. Gehlot, M. Holz, H. Tarawneh
    MAX IV Laboratory, Lund University, Lund, Sweden
  
  In­ser­tion De­vices (IDs) are the sole source of ra­di­a­tion used in all beam­lines in MAX IV Lab­o­ra­tory with 14 IDs in op­er­a­tion of which 6 were built in-house. This paper shows the cur­rent ca­pa­bil­i­ties and per­for­mance of the of the ID mag­netic mea­sure­ment sys­tems, and the on­go­ing de­vel­op­ment work.  
poster icon Poster THPAB047 [1.185 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-THPAB047  
About • paper received ※ 11 May 2021       paper accepted ※ 27 July 2021       issue date ※ 28 August 2021  
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THPAB054 Measurement Results of the First Scape Prototype undulator, photon, superconducting-magnet, insertion-device 3872
 
  • M. Kasa, E.A. Anliker, Q.B. Hasse, Y. Ivanyushenkov, I. Kesgin, Y. Shiroyanagi, E. Trakhtenberg
    ANL, Lemont, Illinois, USA
  
  Funding: Work supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-06CH11357.
The SCAPE (Su­per­Con­duct­ing Ar­bi­trar­ily Po­lar­iz­ing Emit­ter) un­du­la­tor is under de­vel­op­ment at the Ad­vanced Pho­ton Source (APS) as a part of the APS up­grade. SCAPE is com­prised of four su­per­con­duct­ing mag­nets which are arranged to cre­ate an on-axis un­du­la­tor field that can be pla­nar, el­lip­ti­cal, or cir­cu­lar. As a first step to­wards de­vel­op­ing a full length de­vice, a 0.5-me­ter long pro­to­type was man­u­fac­tured and as­sem­bled for test­ing in a liq­uid he­lium bath cryo­stat. A de­scrip­tion of the me­chan­i­cal as­sem­bly and sub­se­quent mea­sure­ment re­sults of the first pro­to­type will be pre­sented in this paper. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-THPAB054  
About • paper received ※ 19 May 2021       paper accepted ※ 01 September 2021       issue date ※ 22 August 2021  
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THPAB198 Commissioning of Current Strips for Elliptically Polarizing Undulators at NSLS-II MMI, undulator, insertion-device, synchrotron 4160
 
  • Y. Hidaka, O.V. Chubar, T. Tanabe
    BNL, Upton, New York, USA
  • C.A. Kitégi
    SOLEIL, Gif-sur-Yvette, France
  
  Funding: This work is supported by U.S. DOE under Contract No. DE-SC0012704.
Most of the El­lip­ti­cally Po­lar­iz­ing Un­du­la­tors (EPUs) at NSLS-II are equipped with cur­rent strips (or flat wires), at­tached to their vac­uum cham­bers. These strips com­pen­sate the dy­namic field in­te­grals of the EPU to min­i­mize un­de­sir­able non­lin­ear beam dy­nam­ics ef­fect that can lead to re­duc­tion in in­jec­tion ef­fi­ciency and beam life­time. For each EPU, we mea­sured the field in­te­grals of the in­ser­tion de­vice alone, the cur­rent strips alone, and both, while cre­at­ing hor­i­zon­tal bumps of dif­fer­ent am­pli­tudes at the straight sec­tion to as­sess the ef­fec­tive­ness of the com­pen­sa­tion pro­vided by the de­sign cur­rent val­ues for the strips. The com­mis­sion­ing re­sults of these cur­rent strips are re­ported in this ar­ti­cle. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-THPAB198  
About • paper received ※ 19 May 2021       paper accepted ※ 23 June 2021       issue date ※ 28 August 2021  
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THPAB249 X-Ray Beam Position Monitor (XBPM) Calibration at NSRC Solaris controls, photon, undulator, radiation 4292
 
  • M. Waniczek, A. Curcio, G.W. Kowalski, R. Panaś, A.I. Wawrzyniak
    NSRC SOLARIS, Kraków, Poland
  
  Dur­ing the in­stal­la­tion of Front-ends in sec­tions 4th (XMCD beam­line fron­tend) and 6th (PHE­LIX beam­line fron­tend) at Na­tional Syn­chro­tron Ra­di­a­tion Cen­tre So­laris (NSRC So­laris), two units (one for each front end) of X-ray Beam Po­si­tion Mon­i­tors (XBPM) have been in­stalled as a di­ag­nos­tic tool en­abling for mea­sure­ment of pho­ton beam po­si­tion. Hard­ware units of XBPM were man­u­fac­tured, de­liv­ered, and even­tu­ally in­stalled in So­laris by FMB Berlin. In order to get read­outs of beam po­si­tion from XBPM units, Lib­era Pho­ton 2016 con­troller has been used as a com­ple­men­tary elec­tronic de­vice. Since XBPM units are sup­posed to be used along with the in­ser­tion de­vice, an on-site Lib­era cal­i­bra­tion was nec­es­sary. Lib­era’s cal­i­bra­tion re­quired few it­er­a­tions of scans in­volv­ing gap and phase move­ment of in­ser­tion de­vices at the 4th and 6th sec­tions of the So­laris ring. The main focus was put on the de­riva­tion of Kx, and Ky co­ef­fi­cients. The con­tent of this doc­u­ment de­scribes step by step the pro­ce­dure of Lib­era’s Kx, Ky co­ef­fi­cients value de­riva­tion at NSRC So­laris.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-THPAB249  
About • paper received ※ 19 May 2021       paper accepted ※ 17 July 2021       issue date ※ 13 August 2021  
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THPAB309 New Working Tune Feedback System for TLS feedback, quadrupole, insertion-device, radiation 4394
 
  • S.J. Huang, Y.K. Lin, Y.C. Lin
    NSRRC, Hsinchu, Taiwan
  
  TLS stor­age ring has two sets of work­ing tun­ing feed­back sys­tems: one is used to cor­rect the work­ing tune de­vi­a­tion caused by in­ser­tion de­vice U90; an­other sys­tem uses a local trim coil to cor­rect the work­ing tune de­vi­a­tion caused by all in­ser­tion de­vices. This ar­ti­cle de­scribes a new work­ing tune feed­back sys­tem in TLS that can cor­rect the work­ing tune ef­fec­tively back to the re­quired con­di­tions for op­er­a­tion; the two ex­ist­ing feed­back sys­tems do not cause prob­lems. We can both avoid in­creas­ing the local ra­di­a­tion dose and de­creas­ing the in­jec­tion ef­fi­ciency.  
poster icon Poster THPAB309 [0.831 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-THPAB309  
About • paper received ※ 15 May 2021       paper accepted ※ 02 July 2021       issue date ※ 23 August 2021  
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