Keyword: timing
Paper Title Other Keywords Page
S01SRA10 HESYRL Control System Status controls, linac, injection, operation 40
 
  • C.-Y. Yao
    USTC/NSRL, Hefei, Anhui, People’s Republic of China
  
  HESYRL syn­chro­tron ra­di­a­tion stor­age ring was com­pleted in 1989 and has been in com­mis­sion­ing since then. Now it has met its de­sign spec­i­fi­ca­tion and is ready for syn­chro­tron light ex­per­i­ments. Con­trol sys­tem of the pro­ject was com­pleted in 1989 and some mod­i­fi­ca­tions were made dur­ing com­mis­sion­ing. This paper de­scribes its pre­sent con­fig­u­ra­tion, sta­tus and up­grad­ing plan.  
DOI • reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S01SRA10  
About • Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
S03SRD14 Control System for HIMAC Synchrotron controls, power-supply, synchrotron, Ethernet 156
 
  • T. Kohno, K. Sato, E. Takada, K. Noda, A.I. Itano, M. Kanazawa, M. Sudou, K. Asami, R. Azumaishi, Y. Morii, N. Tsuzuki, H. Narusaka, Y. Hirao
    NIRS, Chiba-shi, Japan
  • K. Asami, R. Azumaishi
    Hitachi, Ltd., Ibaraki-ken, Japan
  • Y. Morii
    TMEIC, Tokyo, Japan
  • N. Tsuzuki
    Toshiba Mitsubishi Electric Industrial Systems Corporation, Tokyo, Japan
  • H. Narusaka
    DEC-Japan, Tokyo, Japan
  
  A con­trol sys­tem for HIMAC syn­chro­tron has been de­signed. The sys­tem con­sists of a main com­puter, con­sole work­sta­tions, a few small com­put­ers and VME-com­put­ers con­nected via Eth­er­net. The small com­put­ers are ded­i­cated to the con­trol of an in­jec­tion line, an ex­trac­tion line and an RF sys­tem. Power sup­plies in main rings are con­trolled by the VME-com­put­ers through FDI/FDO, DI/DO mod­ules. This paper de­scribes an overview of the syn­chro­tron con­trol sys­tem.  
DOI • reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S03SRD14  
About • Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
S04SRS03 Status of the Control and Beam Diagnostic Systems of the CRYRING Project controls, detector, hardware, diagnostics 167
 
  • J. Starker, M. Engström
    MSL, Stockholm, Sweden
  
  CRYRING is a fa­cil­ity for re­search in atomic, mol­e­c­u­lar and nu­clear physics. It uses a cryo­genic elec­tron beam ion source, CR­Y­SIS, to­gether with an RFQ lin­ear ac­cel­er­a­tor as in­jec­tor into a syn­chro­tron/stor­age ring for very highly charged, heavy ions. The first cir­cu­lat­ing beam was achieved in De­cem­ber 1990. The sta­tus of the sys­tems for con­trol and beam di­ag­nos­tics are de­scribed.  
DOI • reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S04SRS03  
About • Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
S05SRN06 Present Status of the JT-60 Control System controls, plasma, operation, interface 218
 
  • T. Kimura
    JAEA/NAKA, Ibaraki-ken, Japan
  
  The pre­sent sta­tus of the con­trol sys­tem for a large fu­sion de­vice of the JT-60 up­grade toka­mak is re­ported in­clud­ing its orig­i­nal de­sign con­cept, the progress of the sys­tem in the past five-year op­er­a­tion and mod­i­fi­ca­tion for the up­grade. The con­trol sys­tem has the fea­tures of hi­er­ar­chi­cal struc­ture, com­puter con­trol, adop­tion of CAMAC in­ter­faces and pro­tec­tive in­ter­lock by both soft­ware and hard-wired sys­tems. Plant mon­i­tor­ing and con­trol are per­formed by an ef­fi­cient data com­mu­ni­ca­tion via CAMAC high­ways. Se­quen­tial dis­charge con­trol of is ex­e­cuted by a com­bi­na­tion of com­put­ers and a tim­ing sys­tem. A plasma feed­back con­trol sys­tem with fast 32-bit mi­cro­proces­sors and a man/ma­chine in­ter­face with mod­ern work­sta­tions have been newly de­vel­oped for the op­er­a­tion of the JT-60 up­grade.  
DOI • reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S05SRN06  
About • Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
S08NC05 The Transmission of Accelerator Timing Information around CERN interface, controls, network, operation 306
 
  • C.G. Beetham, K. Kohler, C.R.C.B. Parker, J.-B. Ribes
    CERN, Geneva, Switzerland
  
  Prior to the con­struc­tion of the Large Elec­tron Positron (LEP) col­lider, ma­chine tim­ing in­for­ma­tion was trans­mit­ted around CERN’s ac­cel­er­a­tors using a labyrinth of ded­i­cated cop­per wires. How­ever, at an early stage in the de­sign of the LEP con­trol sys­tem, it was de­cided to use an in­te­grated com­mu­ni­ca­tion sys­tem based on Time Di­vi­sion Mul­ti­plex (TDM) tech­niques. There­fore it was con­sid­ered ap­pro­pri­ate to use this fa­cil­ity to trans­mit tim­ing in­for­ma­tion over long dis­tances. This note de­scribes the over­all sys­tem, with em­pha­sis placed on the con­nec­tiv­ity re­quire­ments for the CCITTG.703 se­ries of rec­om­men­da­tions. In ad­di­tion the meth­ods used for error de­tec­tion and cor­rec­tion, and also for re­dun­dancy, are de­scribed. The cost im­pli­ca­tions of using such a TDM based sys­tem are also an­a­lyzed. Fi­nally the per­for­mance and re­li­a­bil­ity ob­tained by using this ap­proach are dis­cussed.  
DOI • reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S08NC05  
About • Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
S08NC06 Time and Load Measuring in the SPS/LEP Control System network, controls, software, hardware 310
 
  • J. Navratil
    Czech Technical University, Prague 6, Czech Republic
  
  This paper de­scribes the ex­pe­ri­ences with the SPS/LEP Con­trol Sys­tem dur­ing its first op­er­a­tional days from the com­mu­ni­ca­tion point of view. The re­sults show dif­fer­ence be­tween hard­ware pos­si­bil­ity of the local com­mu­ni­ca­tion based on the modem tech­nol­ogy and the pos­si­bil­ity to use it by PC ma­chines. There is also sev­eral fig­ures de­scrib­ing the ac­tiv­ity on the com­mu­ni­ca­tion lines.  
DOI • reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S08NC06  
About • Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
S10TS01 Realtime Aspects of Pulse-to-Pulse Modulation controls, real-time, ECR, interface 345
 
  • R. Steiner, C. Riedel, W. Rösch
    GSI, Darmstadt, Germany
  
  The pulse-to-pulse mod­u­la­tion of the SIS-ESR con­trol sys­tem is de­scribed. Fast re­sponse to op­er­a­tor in­ter­ac­tion and to changes in process con­di­tions is em­pha­sized as well as the es­sen­tial part played by the tim­ing sys­tem in pulse-to-pulse mod­u­la­tion. The ben­e­fits of pulse-to-pulse mod­u­la­tion in ac­cel­er­a­tion op­er­at­ing have been de­scribed as early as ’77 for the CERN’s PS com­plex. It is an ef­fec­tive way to in­crease the over­all out­put of valu­able beam­time of one or more ac­cel­er­a­tors. With beamshar­ing, rarely all users of the beam will be un­able to ac­cept the beam at the same time. If the PPM-han­dling quickly re­sponds to chang­ing con­di­tions, there will be vir­tu­ally no dead-time in the ma­chine op­er­at­ing due to in­evitable dead-times of ex­per­i­ments, e.g. dur­ing new ex­per­i­men­tal se­tups. In a multi-ac­cel­er­a­tor fa­cil­ity, PPM is al­most im­per­a­tive. Asyn­chro­nously run­ning ma­chines, every one of them op­er­at­ing as an in­jec­tor for the next one, nor­mally have time left be­tween sub­se­quent in­jec­tions that can be used for ex­per­i­ments.  
DOI • reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S10TS01  
About • Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
S10TS02 Injection Timing System for PLS injection, gun, klystron, kicker 349
 
  • S.-S. Chang, S.J. Choi, M.S. Kim, W. Namkung, S.Y. Park, S.C. Won
    PAL, Pohang, Republic of Korea
  
  The ul­ti­mate goal of the PLS tim­ing sys­tem is to suc­cess­fully in­ject a elec­tron bunch to a pre­designed bucket in the Stor­age Ring. In the Linac, a pre­trig­ger of 102.8 mi­crosec­onds prior to the Gun trig­ger may be re­quired to charge the pulsed di­vces prop­erly and it should be pre­cisely de­layed to syn­chro­nize with beam pass at each ac­cel­er­at­ing col­umn. To in­ject the elec­tron bunch, which fully ac­cel­er­ated in the Linac, into a tar­get bucket of SR, the in­jec­tion kicker mag­nets must be en­er­gized to pro­vide the ap­pro­pri­ate mag­netic field. For the se­quen­tial fill­ing of the SR buck­ets, the ap­pro­pri­ate tim­ing de­lays through­out the en­tire tim­ing sys­tem are pro­gram­ma­ble con­trolled by op­er­a­tor.  
DOI • reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S10TS02  
About • Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
S10TS04 The Development of RF Reference Lines and a Timing System for Japan Linear Collider controls, gun, linac, operation 356
 
  • J. Urakawa, S. Araki, T. Kawamoto, T. Mimashi, Y. Otake, Y. Satoh
    KEK, Ibaraki, Japan
  
  The main linac of Japan Lin­ear Col­lider(JLC) will be op­er­ated at an X-band fre­quency of 11.424 GHz. The po­si­tion­ing of the X-band ac­cel­er­at­ing struc­tures at JLG re­quires pre­cise phase syn­chro­ni­sa­tion over about 10 km. Tem­per­a­ture com­pen­sated fiber optic ca­bles will be used for the trans­mis­sion of the 11.424 GHz RF sig­nal. The per­for­mance of this trans­mis­sion line is de­scribed. Many tim­ing sig­nals will be also trans­mit­ted from the main con­trol room, in which the mas­ter RF fre­quency gen­er­a­tor will be sit­u­ated, via this l.3 ¿m sin­gle mode fiber optic link. The out­line of the tim­ing sys­tem for JLC is given in this paper.  
DOI • reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S10TS04  
About • Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
S10TS05 A New VME Timing Module: TG8 controls, network, real-time, hardware 360
 
  • C.G. Beetham, G. Daems, J.H. Lewis, B. Puccio
    CERN, Geneva, Switzerland
  
  The two ac­cel­er­a­tor di­vi­sions of CERN, namely PS and SL, are defin­ing a new com­mon con­trol sys­tem based on PC, VME and Work­sta­tions. This has pro­vided an op­por­tu­nity to re­view both cen­tral tim­ing sys­tems and to come up with com­mon so­lu­tions. The re­sult was, amongst oth­ers, the de­sign of a unique tim­ing mod­ule, called TG8. The TG8 is a mul­ti­pur­pose VME mod­ule, which re­ceives mes­sages dis­trib­uted over a tim­ing net­work. These mes­sages in­clude tim­ing in­for­ma­tion, clock plus cal­en­dar and telegrams in­struct­ing the CERN ac­cel­er­a­tors on the char­ac­ter­is­tics of the next beam to be pro­duced. The TG8 com­pares in­com­ing mes­sages with up to 256 pro­grammed ac­tions. An ac­tion con­sists of two parts, a trig­ger which matches an in­com­ing mes­sage and what to do when the match oc­curs. The lat­ter part may op­tion­ally cre­ate an out­put pulse on one of the eight out­put chan­nels and/or a bus in­ter­rupt, both with pro­gram­ma­ble delay and telegram con­di­tion­ing.  
DOI • reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S10TS05  
About • Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
S10TS06 Modular Pulse Sequencing in a Tokamak System plasma, experiment, electron, coupling 364
 
  • A.C. Chew, S. Lee, S.H. Saw
    Plasma Research Laboratory, University of Malaya, Kuala Lumpur, Malaysia
  
  Pulse tech­nique ap­plied in the tim­ing and se­quenc­ing of the var­i­ous part of the MUT toka­mak sys­tem are dis­cussed. The mod­u­lar ar­chi­tec­ture of the pulse gen­er­at­ing de­vice high­lights the ver­sa­tile ap­pli­ca­tion of the sim­ple phys­i­cal con­cepts in pre­cise and com­pli­cated re­search ex­per­i­ment. In ex­per­i­men­tal stud­ies of pulse plasma de­vices, tim­ing and se­quenc­ing of the var­i­ous events are an im­por­tant part of the ex­per­i­ment and re­quires care­ful con­sid­er­a­tions. This is achieved in the MUT (Uni­ver­sity of Malaya Toka­mak) toka­mak sys­tem by em­ploy­ing mod­u­lar ar­chi­tec­ture in­volv­ing var­i­ous mod­ules of pulse gen­er­at­ing de­vices.  
DOI • reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S10TS06  
About • Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
S10TS07 The Timing System of the RFX Nuclear Fusion Experiment software, hardware, experiment, operation 367
 
  • V. Schmidt, G. Flor, G. Manduchi, I. Piacentini
    Consorzio RFX, Associazione Euratom-ENEA sulla Fusione, Padova, Italy
  • V. Schmidt
    HMI, Berlin, Germany
  
  The RFX Nu­clear Fu­sion Ex­per­i­ment in Padova, Italy, em­ploys a dis­trib­uted sys­tem to pro­duce pre­ci­sion trig­ger sig­nals for the fast con­trol of the ex­per­i­ment and for the ex­per­i­ment-wide syn­chro­niza­tion of data ac­qui­si­tion chan­nels. The hard­ware of the sys­tem is based on a set of CAMAC mod­ules. The mod­ules have been in­te­grated into a hard­ware/soft­ware sys­tem which pro­vides the fol­low­ing fea­tures: # gen­er­a­tion of pre-pro­grammed tim­ing events, # dis­tri­b­u­tion of asyn­chro­nous (not pre-pro­grammed) tim­ing events, # gat­ing of tim­ing event gen­er­a­tion by Ma­chine Pro­tec­tion Sys­tem, # au­to­matic stop of tim­ing se­quence in case of high­way dam­age, # dual-speed time­base for tran­sient recorders, # sys­tem-wide pre­ci­sion of ¿3 ¿s, time res­o­lu­tion ¿ l0 ¿s. The op­er­a­tion of the tim­ing sys­tem is fully in­te­grated into the RFX data ac­qui­si­tion sys­tem soft­ware. The Tim­ing Sys­tem Soft­ware con­sists of three lay­ers: the low­est one cor­re­sponds di­rectly to the CAMAC mod­ules, the in­ter­me­di­ate one pro­vides pseudo-de­vices which es­sen­tially cor­re­spond to spe­cific fea­tures of the mod­ules (e.g. a dual fre­quency clock source for tran­sient recorders), the high­est level pro­vides sys­tem set-up sup­port. The sys­tem is fully op­er­a­tional and was first used dur­ing the com­mis­sion­ing of the RFX Power Sup­plies in spring ’91.  
DOI • reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S10TS07  
About • Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
S11LLC06 Beam Position Monitor Multiplexer Controller Upgrade at the LAMPF Proton Storage Ring controls, diagnostics, software, interface 393
 
  • W.K. Scarborough, S. Cohen
    LANL, Los Alamos, New Mexico, USA
  
  Funding: Work supported by the U.S. Department of Energy
The beam po­si­tion mon­i­tor (8PM) is one of the pri­mary di­ag­nos­tic tools used for the tun­ing of the pro­ton stor­age ring (PSR) at the Clin­ton P. An­der­son Meson Physics Fa­cil­ity (LAMPF). A re­place­ment for the ex­ist­ing, mono­lithic, wire-wrapped mi­cro­proces­sor-based BPM mul­ti­plexer con­troller has been built. The con­troller has been re­designed as a mod­u­lar sys­tem re­tain­ing the same func­tion­al­ity of the orig­i­nal sys­tem built in 1981. In­di­vid­ual printed cir­cuit cards are used for each con­troller func­tion to in­sure greater main­tain­abil­ity and ease of keep­ing a spare parts in­ven­tory. Pro­gram­ma­ble logic de­vice tech­nol­ogy has sub­stan­tially re­duced the com­po­nent count of the new con­troller. Di­ag­nos­tic soft­ware was writ­ten to sup­port the de­vel­op­ment of the up­graded con­troller. The new soft­ware ac­tu­ally un­cov­ered some flaws in the orig­i­nal CAMAC in­ter­face. 		 
DOI • reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S11LLC06  
About • Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
S18BPA03 New Controls for the CERN-PS Hadron Injection Process Using Operating Tools and High-Level Accelerator Modelling Programmes injection, controls, emittance, betatron 583
 
  • M. Arruat, M. Boutheon, L. Cons, Y. Deloose, F. Di Maio, D. Gueugnon, R. Hoh, M. Martini, K. Priestnall, J.P. Riunaud
    CERN, Meyrin, Switzerland
  
  A new con­trol sys­tem using man-ma­chine in­ter­face tools with work­sta­tions as con­soles has been suc­cess­fully put into op­er­a­tion for the in­jec­tion of hadrons in the CERN Pro­ton Syn­chro­tron (PS). This paper mainly fo­cuses on spe­cial­ized mod­el­ling pro­grammes in­volv­ing com­plex treat­ments for an op­ti­mum op­er­a­tion of the in­jec­tion process. These pro­grammes in­clude the con­trol of the in­jec­tion tim­ings, the mea­sure­ment of the beam emit­tance with an es­ti­ma­tion of how well the in­com­ing beam is matched, and the cor­rec­tion of os­cil­la­tions at in­jec­tion. The in­fra­struc­ture and the pro­gram­ming en­vi­ron­ment un­der­lay­ing the new con­trol sys­tem are de­scribed else­where 3¿ The out­stand­ing fea­ture of the in­ter­nal struc­ture of all these mod­el­ling pro­grammes is that they carry out three kinds of data in­ter­ac­tion: the input, that is the mea­sure­ments (e.g. beam time po­si­tions, pro­files and tra­jec­to­ries), the phys­i­cal pa­ra­me­ters (e.g. re­quired times for syn­chro­niza­tion, beam emit­tance, beam space po­si­tion and angle at in­jec­tion), and the out­put, mainly the hard­ware val­ues (e.g. pre­set counter set­tings, cur­rents to apply to in­jec­tion steer­ing mag­nets).  
DOI • reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S18BPA03  
About • Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)