Keyword: ion-source
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TUPHA106 ESS Accelarator Oxygen Depletion Hazard Detection System ion, PLC, cryogenics, controls 666
 
  • A. Toral Diez, S.L. Birch, M. Mansouri, A. Nordt, D. Paulic, Y.K. Sin
    ESS, Lund, Sweden
  
  At the Eu­ro­pean Spal­la­tion Source ERIC (ESS), cryo­genic cool­ing is es­sen­tial for var­i­ous equip­ment of the fa­cil­ity. The ESS Su­per­con­duct­ing LINAC and the ESS Cry­omod­ule Test Stand, will re­quire major cryo­genic ser­vices in order to be sup­plied with liq­uid ni­tro­gen and he­lium. Since the use of cryo­genic flu­ids can be as­so­ci­ated with Oxy­gen De­ple­tion Haz­ard (ODH), the ESS Pro­tec­tion and Safety Sys­tems group will in­stall an ODH De­tec­tion Sys­tem which is a PLC-based alarm sys­tem. This sys­tem will mon­i­tor real time Oxy­gen con­cen­tra­tion lev­els in des­ig­nated areas, with the aim to alarm per­son­nel if the oxy­gen level is de­tected below cer­tain thresh­olds. This paper gives an overview about the re­quire­ments, sys­tem ar­chi­tec­ture, hard­ware and soft­ware of the ODH De­tec­tion Sys­tem in ESS Ac­cel­er­a­tor build­ings  
poster icon Poster TUPHA106 [2.899 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-TUPHA106  
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THCPA02 ESS Accelerator Safety Interlock System ion, controls, radiation, operation 1213
 
  • D. Paulic, S.L. Birch, M. Mansouri, A. Nordt, Y.K. Sin, A. Toral Diez
    ESS, Lund, Sweden
  
  Pro­vid­ing and as­sur­ing safe con­di­tions for per­son­nel is a key pa­ra­me­ter re­quired to op­er­ate the Eu­ro­pean Spal­la­tion Source (ESS). The main pur­pose of the Per­son­nel Safety Sys­tems (PSS) at ESS is to pro­tect work­ers from the fa­cil­ity's ion­is­ing prompt ra­di­a­tion haz­ards, but also iden­tify as well as mit­i­gate against other haz­ards such as high volt­age or oxy­gen de­ple­tion. PSS con­sist of three sys­tems: the Safety in­ter­lock sys­tem, the Ac­cess con­trol sys­tem and the Oxy­gen de­fi­ciency haz­ard (ODH) de­tec­tion sys­tem. The Safety in­ter­lock sys­tem en­sures the safety func­tions of the PSS by con­trol­ling all haz­ardous equip­ment for start­ing the beam op­er­a­tion and pow­er­ing the RF-pow­ered units and al­low­ing its op­er­a­tion when per­son­nel is safe. This paper will de­scribe the ESS PSS Ac­cel­er­a­tor Safety in­ter­lock sys­tem's scope, strat­egy, method­ol­ogy and cur­rent sta­tus.  
slides icon Slides THCPA02 [4.292 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-THCPA02  
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THPHA028 Status Update for the HIT Accelerator Control System ion, controls, database, GUI 1409
 
  • J.M. Mosthaf, Th. Haberer, S. Hanke, K. Höppner, A. Peters
    HIT, Heidelberg, Germany
  
  Funding: HIT Betriebs GmbH
Changes in the ac­cel­er­a­tor beam­line of the Hei­del­berg Ion­beam Ther­apy-Cen­ter ne­ces­si­tated a rel­e­vant change in the ac­cel­er­a­tor con­trol sys­tem. Specif­i­cally the ad­di­tion of a third ion source to the LEBT beam­line dic­tated an ex­pan­sion of the Vir­tual Ac­cel­er­a­tor struc­ture both in the data­base and the DCU soft­ware. The de­ci­sion to go to a vir­tual server in­fra­struc­ture to meet the de­mands for bet­ter re­dun­dancy and per­for­mance prompted an over­haul of the ACS soft­ware and hard­ware base. Two new re­dun­dant vir­tu­al­iza­tion servers and dou­bled stor­age sys­tems helped to in­crease safety and sys­tem per­for­mance. To take ad­van­tage of the newer hard­ware and 64-bit op­er­at­ing sys­tems, all soft­ware was con­verted to a 64 bit base. Ad­di­tion­ally, as a qual­ity of life and se­cu­rity im­prove­ment, the down­load and flash func­tion­al­ity of the ACS were up­dated to en­hance per­for­mance and se­cu­rity checks for qual­ity as­sur­ance mea­sures. The new vir­tu­al­iza­tion host server and in­fra­struc­ture hard­ware in con­junc­tion with the 64 bit up­date and en­su­ing ef­fi­ciency in­creases have re­sulted in a safer and sig­nif­i­cantly faster ACS with higher re­dun­dancy in case of hard­ware fail­ure. 		 
poster icon Poster THPHA028 [0.961 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-THPHA028  
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THPHA035 High Level Control System Code with Automatic Parametric Characterization Capabilities ion, EPICS, interface, controls 1432
 
  • L. Neri, L. Celona, S. Gammino
    INFN/LNS, Catania, Italy
  
  Sev­eral de­gree of free­dom have been in­tro­duced in the de­sign of the pro­ton source (named PS-ESS) and in the Low En­ergy Beam Trans­port line (LEBT) de­vel­oped at INFN-LNS for the Eu­ro­pean Spal­la­tion Source (ESS) pro­ject. The beam com­mis­sion­ing was fo­cused on the most im­por­tant work­ing pa­ra­me­ters in order to op­ti­mize the beam pro­duc­tion per­for­mance tak­ing into ac­count the ESS ac­cel­er­a­tor re­quire­ments. The de­vel­op­ment of a MAT­LAB cus­tom code able to in­ter­act with the EPICS con­trol sys­tem frame­work was needed to op­ti­mize the short time avail­able for the beam com­mis­sion­ing. The code was used as an ad­di­tional high level con­trol sys­tem layer able to change all source pa­ra­me­ters and read all beam di­ag­nos­tics out­put data. More than four hun­dred of thou­sand con­fig­u­ra­tions have been ex­plored in a wide range of work­ing pa­ra­me­ters. The ca­pa­bil­ity to con­nect Mat­lab to EPICS en­abled also the de­vel­op­ing of a ge­netic al­go­rithm op­ti­miza­tion code able to au­to­matic tune the source to­wards a pre­cise cur­rent value and sta­bil­ity. A ded­i­cated graph­i­cal tool was de­vel­oped for the data analy­sis. Un­ex­pected ben­e­fit come out from this ap­proach that will be shown in this paper.  
poster icon Poster THPHA035 [1.420 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-THPHA035  
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THPHA081 LO Board for 704.42 MHz Cavity Simulator for ESS ion, LLRF, cavity, controls 1573
 
  • I. Rutkowski, K. Czuba, M.G. Grzegrzolka
    Warsaw University of Technology, Institute of Electronic Systems, Warsaw, Poland
  
  Funding: Work supported by Polish Ministry of Science and Higher Education, decision number DIR/WK/2016/03
This paper de­scribes the re­quire­ments, ar­chi­tec­ture, and mea­sure­ments re­sults of the local os­cil­la­tor (LO) board pro­to­type. The de­sign will pro­vide low phase noise clock and het­ero­dyne sig­nals for the 704.42 MHz Cav­ity Sim­u­la­tor for the Eu­ro­pean Spal­la­tion Source. A field de­tec­tion has crit­i­cal in­flu­ence on the sim­u­la­tion's per­for­mance and its qual­ity de­pends on the qual­ity of the two afore­men­tioned sig­nals. The clock fre­quency is a sub­har­monic of the ref­er­ence fre­quency and choice of the fre­quency di­vider gen­er­at­ing the clock sig­nals is dis­cussed. The per­for­mance of se­lected di­viders was com­pared. The LO fre­quency must be syn­the­sized and fre­quency syn­the­sis schemes are in­ves­ti­gated. Crit­i­cal com­po­nents used in the di­rect ana­log scheme are iden­ti­fied and their se­lec­tion cri­te­ria were given. 		 
poster icon Poster THPHA081 [1.406 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-THPHA081  
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