Keyword: hardware
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TUPAB322 Redesign and Upgrade of the LHC Access Control System controls, site, interface, PLC 2249
 
  • T. Hakulinen, S. Di Luca, G. Godineau, R. Nunes, G. Smith
    CERN, Meyrin, Switzerland
  
  The old LHC Ac­cess Con­trol Sys­tem (LACS) was based on a sin­gle ac­cess con­trol so­lu­tion, which in­te­grated soft­ware and hard­ware into one mono­lithic ap­pli­ca­tion en­com­pass­ing all the dif­fer­ent sub­sys­tems (ac­cess con­trol, video sur­veil­lance, in­ter­phones, bio­m­e­try, equip­ment con­trol, safety el­e­ments). Both the hard­ware and soft­ware were ap­proach­ing end-of-life by the ven­dor be­fore the CERN Long Shut­down 2 (LS2). The new de­sign is based on a dis­trib­uted ap­proach, where the dif­fer­ent sub­sys­tems are in­te­grated in a flex­i­ble man­ner with well-de­fined in­ter­faces, which will per­mit much eas­ier sin­gle sub-sys­tem man­age­ment, up­grades, and even full re­place­ments if nec­es­sary. From the sys­tem point of view, the focus is on the ad­van­tages that this re­design brings to sys­tem op­er­a­tion, test­ing, and man­age­ment. Pro­ce­du­rally the in­ter­est is in the over­all man­age­ment of a very com­plex in-place up­grade of a sys­tem, where the new im­ple­men­ta­tion needed to co­ex­ist with the old dur­ing its con­stant si­mul­ta­ne­ous so­lic­i­ta­tion over the LS2.  
poster icon Poster TUPAB322 [6.906 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-TUPAB322  
About • paper received ※ 15 May 2021       paper accepted ※ 28 May 2021       issue date ※ 28 August 2021  
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WEPAB102 Half-Metal Spin Filter for Highly Polarized Emission from GaAs Photocathodes electron, polarization, cathode, lattice 2833
 
  • S. Poddar, C.-J. Jing, E.J. Montgomery
    Euclid Beamlabs, Bolingbrook, USA
  • P. Lukashev
    University of Northern Iowa, Cedar Falls, Iowa, USA
  • C. Palmstrøm
    UCSB, Santa Barbara, California, USA
  • M.L. Stutzman, S. Zhang
    JLab, Newport News, Virginia, USA
  
  Funding: Work supported by Department of Energy grant number DE-SC0020564.
GaAs-based pho­to­cath­odes are one of the major sources of spin-po­lar­ized elec­trons and are cru­cial for the up­com­ing Elec­tron-Ion col­lider ex­per­i­ments which in­cludes study of pro­ton spin and spin par­ity vi­o­la­tion in the stan­dard model. The the­o­ret­i­cal po­lar­iza­tion limit in un­strained GaAs pho­to­cath­odes is 50 % but only 35 % is rou­tinely achieved in ex­per­i­ments. Spin se­lec­tive fil­ter­ing al­lows to boost the spin po­lar­iza­tion be­yond the 50 % the­o­ret­i­cal limit. In this work, first-prin­ci­ple elec­tronic cal­cu­la­tions using stan­dard Den­sity Func­tional The­ory are per­formed to pre­dict pos­si­ble Heusler alloy half-metal can­di­dates to be used as spin-fil­ter. Sim­u­la­tions are also per­formed to in­ves­ti­gate the half-metal­lic­ity as func­tion of the mag­netic spin di­rec­tion. Sev­eral de­vices are ex­per­i­men­tally fab­ri­cated using ded­i­cated Mol­e­c­u­lar Beam Epi­taxy growth sys­tem. We im­ple­mented Quan­tum Ef­fi­ciency and Po­lar­iza­tion test­ing of these half-metal/GaAs het­erostruc­tures using a ded­i­cated Mott po­larime­ter sys­tem. Pho­toe­mis­sion can also be seen on mag­net­i­cally switch­ing the spin-fil­ter di­rec­tion ac­com­pa­nied by a change in sign of the asym­me­try which is a qual­i­ta­tive proof of the spin-fil­ter­ing ef­fect. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB102  
About • paper received ※ 20 May 2021       paper accepted ※ 28 July 2021       issue date ※ 27 August 2021  
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WEPAB287 Upgrade of the ELBE Timing System timing, operation, gun, GUI 3326
 
  • M. Kuntzsch, M. Justus, A. Schwarz, K. Zenker
    HZDR, Dresden, Germany
  • L. Krmpotic, U. Legat, U. Rojec
    Cosylab, Ljubljana, Slovenia
  • Ž. Oven
    COSYLAB, Control System Laboratory, Ljubljana, Slovenia
  
  At the ELBE ac­cel­er­a­tor cen­ter a su­per­con­duct­ing linac is op­er­ated to drive man­i­fold sec­ondary ra­di­a­tion sources like two in­frared FELs, a positron source and a THz fa­cil­ity. The ma­chine uses two in­jec­tors as elec­tron sources that are ac­cel­er­ated in the main linac. The user ex­per­i­ments de­mand a large va­ri­ety of bunch pat­terns from sin­gle shot to macro pulsed and cw beam at up to 26 MHz rep­e­ti­tion rate. At ELBE a new tim­ing sys­tem is being de­vel­oped based on the MRF hard­ware plat­form and the MRF Tim­ing Sys­tem IOC. It uses two mas­ters and a scal­able num­ber of con­nected re­ceivers to gen­er­ate the de­sired pulse pat­terns for op­er­at­ing the ma­chine and to con­trol user ex­per­i­ments. The con­tri­bu­tion will show the ar­chi­tec­ture of the tim­ing sys­tem, the con­trol in­ter­fac­ing and per­for­mance mea­sure­ments ac­quired on the test bench.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB287  
About • paper received ※ 21 May 2021       paper accepted ※ 01 July 2021       issue date ※ 13 August 2021  
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WEPAB288 A New Timing System for PETRA IV timing, controls, FEL, storage-ring 3329
 
  • H. Lippek, A. Aghababyan, K. Brede, H.T. Duhme, M. Fenner, U. Hurdelbrink, H. Kay, H. Schlarb, T. Wilksen
    DESY, Hamburg, Germany
  
  At DESY an up­grade of the PETRA III syn­chro­tron light source to­wards a fourth-gen­er­a­tion, low emit­tance ma­chine PETRA IV is cur­rently being ac­tively pur­sued. The re­al­iza­tion of this new ma­chine im­plies a new de­sign of the tim­ing and syn­chro­niza­tion sys­tem since re­quire­ments on beam qual­ity and con­trols will sig­nif­i­cantly change from the ex­ist­ing im­ple­men­ta­tion at PETRA III. As of now the tech­ni­cal de­sign phase of the PETRA IV pro­ject is in full swing. For the tim­ing sys­tem the de­sign process of the over­all sys­tem as well as the eval­u­a­tion of in­di­vid­ual com­po­nents has been started as of last year. Given the suc­cess of the at DESY de­vel­oped Mi­croTCA.4-based tim­ing sys­tem for the Eu­ro­pean XFEL ac­cel­er­a­tor it has been cho­sen to serve as a basis for the PETRA IV tim­ing sys­tem de­vel­ope­ment as well. We pre­sent first de­sign ideas of the major tim­ing sys­tem hard­ware com­po­nent, a Mi­croTCA.4-based AMC for dis­trib­ut­ing clocks, trig­gers and fur­ther bunch-syn­chro­nous in­for­ma­tion within the ac­cel­er­a­tor com­plex and to user ex­per­i­ments. First steps of an eval­u­a­tion process for de­sign­ing the AMC hard­ware are briefly il­lus­trated.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB288  
About • paper received ※ 19 May 2021       paper accepted ※ 01 July 2021       issue date ※ 10 August 2021  
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WEPAB309 Study and Design of the Appropriate High-Performance Computing System for Beamline Data Analysis Application at Iranian Light Source Facility (ILSF) software, experiment, data-analysis, network 3399
 
  • A. Khaleghi, M. Akbari
    ILSF, Tehran, Iran
  • H. Haedar, K. Mahmoudi, M. Takhttavani
    IKIU, Qazvin, Iran
  • S. Mahmoudi
    Sharif University of Technology (SUT), Tehran, Iran
  
  Data analy­sis is a very im­por­tant step in doing ex­per­i­ments at light sources, where mul­ti­ple ap­pli­ca­tion and soft­ware pack­ages are used for this pur­pose. In this paper we have re­viewed some soft­ware pack­ages that are used for data analy­sis and de­sign at Iran­ian Light Source Fa­cil­ity then ac­cord­ing to their pro­cess­ing needs, after tak­ing in mind dif­fer­ent HPC sce­nar­ios a suit­able ar­chi­tec­ture for de­ploy­ment of the ILSF HPC is pre­sented. The pro­posed ar­chi­tec­ture is a clus­ter of 64 com­put­ing nodes con­nected through Eth­er­net and In­fini­Band net­work run­ning a Linux op­er­at­ing sys­tem with sup­port of MPI par­al­lel en­vi­ron­ment.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB309  
About • paper received ※ 19 May 2021       paper accepted ※ 23 July 2021       issue date ※ 01 September 2021  
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WEPAB310 Study and Design of a High-Performance Computing Infrastructure for Iranian Light Source Facility Based on the Accelerator Physicists and Engineers’ Applications Requirements software, network, Ethernet, simulation 3402
 
  • K. Mahmoudi, H. Haedar, A. Khaleghi
    IKIU, Qazvin, Iran
  • M. Akbari, A. Khaleghi
    ILSF, Tehran, Iran
  • S. Mahmoudi
    IUST, Narmac, Tehran, Iran
  
  Syn­chro­tron de­sign and op­er­a­tion are one of the com­plex tasks which re­quires a lot of pre­cise com­pu­ta­tion. As an ex­am­ple, we could men­tion the sim­u­la­tions done for cal­cu­lat­ing the im­ped­ance bud­get of the ma­chine which re­quires a no­table amount of com­pu­ta­tional power. In this paper we are going to re­view dif­fer­ent HPC sce­nar­ios suit­able for this mat­ter then we will pre­sent our de­sign of a suit­able HPC based on the ac­cel­er­a­tor physi­cists and en­gi­neers’ needs. Going through dif­fer­ent HPC sce­nar­ios such as shared mem­ory ar­chi­tec­tures, dis­trib­uted mem­ory ar­chi­tec­tures, clus­ter, grid and cloud com­put­ing we con­clude im­ple­men­ta­tion of a ded­i­cated com­put­ing clus­ter can be de­sired for ILSF. Clus­ter com­put­ing pro­vides the op­por­tu­nity for easy and saleable sci­en­tific com­pu­ta­tion for ILSF also an­other ad­van­tage is that its re­sources can be used for run­ning cloud or grid com­put­ing plat­forms as well.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB310  
About • paper received ※ 19 May 2021       paper accepted ※ 19 July 2021       issue date ※ 12 August 2021  
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WEPAB321 ALS-U Instrumentation Overview timing, instrumentation, electron, controls 3427
 
  • J.M. Weber, J.C. Bell, M.J. Chin, S. De Santis, R.F. Gunion, S. Murthy, W.E. Norum, G.J. Portmann, C. Serrano
    LBNL, Berkeley, California, USA
  • W.K. Lewis
    Osprey DCS LLC, Ocean City, USA
  
  Funding: Work supported by the Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231
The Ad­vanced Light Source Up­grade (ALS-U) to a dif­frac­tion-lim­ited stor­age ring with a small vac­uum cham­ber di­am­e­ter re­quires ex­cel­lent orbit sta­bil­ity and a fast re­sponse orbit in­ter­lock for ma­chine pro­tec­tion. The on-axis swap-out in­jec­tion scheme and dual RF fre­quen­cies de­mand fast mon­i­tor­ing of pulsed in­jec­tion mag­nets and a novel ap­proach to tim­ing. Re­cent de­vel­op­ment ef­forts at ALS and ad­vances in PLLs, FPGAs, and RF­SoCs that pro­vide higher per­for­mance and mixed-sig­nal in­te­gra­tion can be lever­aged for in­stru­men­ta­tion so­lu­tions to these ac­cel­er­a­tor chal­lenges. An overview of pre­lim­i­nary ALS-U in­stru­men­ta­tion sys­tem de­signs and sta­tus will be pre­sented. 		 
poster icon Poster WEPAB321 [23.306 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB321  
About • paper received ※ 19 May 2021       paper accepted ※ 27 July 2021       issue date ※ 22 August 2021  
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WEPAB323 High Performance DAQ Infrastructure to Enable Machine Learning for the Advanced Photon Source Upgrade monitoring, controls, EPICS, data-acquisition 3434
 
  • G. Shen, N.D. Arnold, T.G. Berenc, J. Carwardine, E. Chandler, T. Fors, T.J. Madden, D.R. Paskvan, C. Roehrig, S.E. Shoaf, S. Veseli
    ANL, Lemont, Illinois, USA
  
  Funding: Argonne National Laboratory’s work was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under contract DE-AC02-06CH11357.
It is well known that the ef­fi­ciency of an ad­vanced con­trol al­go­rithm like ma­chine learn­ing is as good as its data qual­ity. Much re­cent progress in tech­nol­ogy en­ables the mas­sive data ac­qui­si­tion from a con­trol sys­tem of mod­ern par­ti­cle ac­cel­er­a­tor, and the wide use of em­bed­ded con­trollers, like field-pro­gram­ma­ble gate ar­rays (FPGA), pro­vides an op­por­tu­nity to col­lect fast data from tech­ni­cal sub­sys­tems for mon­i­tor­ing, sta­tis­tics, di­ag­nos­tics or fault record­ing. To im­prove the data qual­ity, at the APS Up­grade pro­ject, a gen­eral-pur­pose data ac­qui­si­tion (DAQ) sys­tem is under ac­tive de­vel­op­ment. The APS-U DAQ sys­tem col­lects high-qual­ity fast data from un­der­neath em­bed­ded con­trollers, es­pe­cially the FPGAs, with the man­ner of time-cor­re­la­tion and syn­chro­nously sam­pling, which could be used for com­mis­sion­ing, per­for­mance mon­i­tor­ing, trou­bleshoot­ing, and early fault de­tec­tion, etc. This paper pre­sents the de­sign and lat­est progress of APS-U high-per­for­mance DAQ in­fra­struc­ture, as well as its prepa­ra­tion to en­able the use of ma­chine learn­ing tech­nol­ogy for APS-U, and its use cases at APS. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB323  
About • paper received ※ 19 May 2021       paper accepted ※ 24 June 2021       issue date ※ 29 August 2021  
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THPAB031 Dump Line Layout and Beam Dilution Pattern Optimization of the Future Circular Collider kicker, quadrupole, target, extraction 3815
 
  • B. Facskó, D. Barna
    Wigner Research Centre for Physics, Institute for Particle and Nuclear Physics, Budapest, Hungary
  • A. Lechner, E. Renner
    CERN, Geneva, Switzerland
  
  To avoid any dam­age to the beam dump tar­get in the Fu­ture Cir­cu­lar Col­lider, the beam will be swept over its sur­face using os­cil­lat­ing kick­ers in the x/y planes with a 90-de­gree phase dif­fer­ence, and an am­pli­tude chang­ing in time, cre­at­ing a spi­ral pat­tern. The ideal pat­tern must have an in­creas­ing spi­ral pitch to­wards smaller radii to pro­duce an even en­ergy de­po­si­tion den­sity. We rec­om­mend the re­al­iza­tion of the op­ti­mal pat­tern using two beat­ing fre­quen­cies. This method en­ables a flat en­ergy de­po­si­tion den­sity while only using sim­ple in­de­pen­dent damped os­cil­la­tors. In this poster, we also pre­sent the study of the beam­line op­tics and hard­ware that can re­al­ize the needed pat­tern. Two dif­fer­ent pos­si­ble hard­ware lay­outs were ex­am­ined and op­ti­mized as well.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-THPAB031  
About • paper received ※ 19 May 2021       paper accepted ※ 28 July 2021       issue date ※ 18 August 2021  
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THPAB190 Optimising and Extending a Single-Particle Tracking Library for High Parallel Performance GPU, lattice, simulation, interface 4146
 
  • M. Schwinzerl, H. Bartosik, R. De Maria, G. Iadarola, K. Paraschou
    CERN, Geneva, Switzerland
  • A. Oeftiger
    GSI, Darmstadt, Germany
  • M. Schwinzerl
    KFUG/IMSC, Graz, Austria
  
  Six­Track­Lib is a li­brary for per­form­ing beam-dy­nam­ics sim­u­la­tions on highly par­al­lel com­put­ing de­vices such as shared mem­ory multi-core proces­sors or graph­i­cal pro­cess­ing units (GPUs). Its sin­gle-par­ti­cle ap­proach fits very well with par­al­lel im­ple­men­ta­tions with rea­son­able base­line per­for­mance, mak­ing such a li­brary an in­ter­est­ing build­ing block for var­i­ous use cases, in­clud­ing sim­u­la­tions cov­er­ing col­lec­tive ef­fects. We de­scribe op­ti­miza­tions to im­prove their per­for­mance on Six­Track­Lib’s main tar­get plat­forms and the as­so­ci­ated per­for­mance gains. Fi­nally, we out­line the im­ple­mented tech­ni­cal in­ter­faces and ex­ten­sions that allow Six­Track­Lib to be used in a wider range of ap­pli­ca­tions and stud­ies.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-THPAB190  
About • paper received ※ 18 May 2021       paper accepted ※ 14 July 2021       issue date ※ 16 August 2021  
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THPAB257 Fast Orbit Corrector Power Supply in MTCA.4 Form Factor for Sirius Light Source controls, power-supply, feedback, target 4307
 
  • A.F. Giachero, G.B.M. Bruno, L.M. Russo, D.O. Tavares
    LNLS, Campinas, Brazil
  
  A new fast orbit feed­back (FOFB) hard­ware ar­chi­tec­ture has been pur­sued at Sir­ius. The fast cor­rec­tor mag­nets’ are fed by power sup­ply mod­ules which are placed in the same Mi­croTCA.4 crates where the BPM dig­i­tiz­ers and FOFB con­trollers are lo­cated. Each chan­nel is made of a 3-Watt lin­ear am­pli­fier whose out­put cur­rents are dig­i­tally con­trolled by the same FPGA where the dis­trib­uted orbit feed­back con­troller is processed. The am­pli­fier is spec­i­fied to reach up to 10 kHz small-sig­nal band­width on a 3.5 mH in­duc­tance mag­net and ±1 A full scale, which trans­lates to 30 urad de­flec­tion on Sir­ius’ 3 GeV beam. Such a high level of in­te­gra­tion aims at min­i­miz­ing the over­all la­tency of the FOFB loop while lever­ag­ing the crate in­fra­struc­ture, namely elec­tron­ics en­clo­sure, DC power, cool­ing, and hard­ware man­age­ment sup­port al­ready pro­vided by the MTCA.4 crates. The fast cor­rec­tor power sup­ply chan­nels are placed on Rear Tran­si­tion Mod­ules (RTMs) which are at­tached to the front AMC FPGA mod­ule where the FOFB con­troller is im­ple­mented. This paper will de­scribe the main de­sign con­cepts and re­port on the ex­per­i­men­tal re­sults of the first pro­to­types.  
poster icon Poster THPAB257 [48.881 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-THPAB257  
About • paper received ※ 22 May 2021       paper accepted ※ 27 July 2021       issue date ※ 20 August 2021  
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THPAB264 FOFB System Upgrade to ZynqMP FPGA with Fast ORM Measurement FPGA, closed-orbit, storage-ring, EPICS 4322
 
  • Y.E. Tan, S. Chen, R.B. Hogan, A. Michalczyk
    AS - ANSTO, Clayton, Australia
  
  The FOFB proces­sor has been ported from a Ver­tex 6 FPGA to a Zyn­qMP SoC (Sys­tem on Chip) to pro­vide ad­di­tional re­sources to in­clude the en­hanced orbit di­ag­nos­tics (EOD) sys­tem that has been de­signed to in­ject si­nu­soidal and pink noise through the feed­back loop. The am­pli­tude, du­ra­tion, phase and fre­quency of si­nu­soidal, am­pli­tude and du­ra­tion of pink noise is user pro­gram­ma­ble.  
poster icon Poster THPAB264 [1.601 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-THPAB264  
About • paper received ※ 04 June 2021       paper accepted ※ 26 July 2021       issue date ※ 15 August 2021  
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THPAB295 Application of CMM Technology in Accelerator Magnet Detection software, quadrupole, detector, radiation 4381
 
  • S. Li, F.S. Chen, C.D. Deng, W. Kang, Y.Q. Liu, X. Wu, Y.W. Wu
    IHEP, Beijing, People’s Republic of China
  
  Ac­cel­er­a­tor mag­net is one of the most dif­fi­cult equip­ment in ac­cel­er­a­tor hard­ware sys­tem. With the im­prove­ment of phys­i­cal re­quire­ments, more and more high tech­ni­cal re­quire­ments are put for­ward for mag­nets. This paper mainly in­tro­duces the new ap­pli­ca­tion of three co­or­di­nate mea­sure­ment tech­nol­ogy in the de­tec­tion of ac­cel­er­a­tor mag­net, and in­tro­duces the work­ing process of CMM in the de­tec­tion of ac­cel­er­a­tor mag­net polar pro­file.  
poster icon Poster THPAB295 [0.677 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-THPAB295  
About • paper received ※ 14 May 2021       paper accepted ※ 02 September 2021       issue date ※ 29 August 2021  
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THPAB311 Using Linear Regression to Model the Parameters of the Flat Wires in TLS-EPU56 feedback, injection, undulator, electron 4399
 
  • S.J. Huang, Y.H. Chang, T.Y. Chung
    NSRRC, Hsinchu, Taiwan
  • Y.W. Chen
    Academia Sinica, Taipei, Taiwan
  
  Al­though a the­o­ret­i­cal cal­cu­la­tion might pre­dict the set cur­rents of the flat wires, which are used to com­pen­sate the de­vi­a­tion in the Be­ta­tron tune caused by the el­lip­ti­cally po­lar­ized un­du­la­tor (EPU), those set cur­rents must still be tuned in re­al­ity. To ap­proach this re­al­ity, a strat­egy of Ma­chine Learn­ing was adopted, which in­cluded col­lect­ing real-con­di­tion data and using a lin­ear-re­gres­sion model to ad­just the pa­ra­me­ters of the flat wires. After train­ing the model, the pre­dic­tions in vari­ables tune x, tune y and beam size x were com­pared with the re­quired amount of cor­rec­tion of the EPU at var­i­ous gaps and phases. To prove the fea­si­bil­ity of this method, a test was per­formed under the real con­di­tions of ac­cel­er­a­tor Tai­wan Light Source (TLS).  
poster icon Poster THPAB311 [1.226 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-THPAB311  
About • paper received ※ 13 May 2021       paper accepted ※ 28 June 2021       issue date ※ 30 August 2021  
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