Keyword: HOM
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MO2AO07 Dynamical Modelling Validation and Control Development for the New High-Dynamic Double-Crystal Monochromator (HD-DCM-Lite) for Sirius/LNLS controls, FPGA, MMI, experiment 100
 
  • T.R. Silva Soares, J.P.S. Furtado, R.R. Geraldes, M. Saveri Silva, G.S. de Albuquerque
    LNLS, Campinas, Brazil
  
  Two new High-Dy­namic Dou­ble-Crys­tal Mono­chro­ma­tors (HD-DCM-Lite) are under in­stal­la­tion in Sir­ius/LNLS for the new beam­lines QUATI (quick-EX­AFS) and SA­PU­CAIA (SAXS), which re­quires high in-po­si­tion sta­bil­ity (5 nrad RMS in terms of pitch) whereas QUATI’s DCM de­mands the abil­ity to per­form quick si­nu­soidal scans in fre­quen­cies, for ex­am­ple 15 Hz at 4 mrad peak-to-peak am­pli­tude. There­fore, this equip­ment aims to fig­ure as an un­par­al­leled bridge be­tween slow step-scan DCMs, and chan­nel-cut quick-EX­AFS mono­chro­ma­tors. In the pre­vi­ous con­fer­ence, the dy­nam­i­cal mod­el­ling of HD-DCM-Lite was pre­sented, in­di­cat­ing the ex­pected per­for­mance to achieve QUATI and SA­PU­CAIA re­quire­ments. In this work, we are going to pre­sent the of­fline val­i­da­tion of the dy­nam­i­cal mod­el­ling, com­par­ing to the so­lu­tions achieved for the pre­vi­ous ver­sion of LNLS HD-DCMs. This work also pre­sents the hard­ware-based con­trol ar­chi­tec­ture de­vel­op­ment, dis­cussing the loop shap­ing tech­nique and up­grades in the sys­tem, such as the in­crease of the po­si­tion res­o­lu­tion, syn­chro­niza­tion of the ro­tary stages, and FPGA code op­ti­miza­tion. Fur­ther­more, we de­scribe how the mo­tion con­troller was de­vel­oped, given the high-per­for­mance mo­tion con­trol, such as com­plex con­trol al­go­rithm in par­al­lel with a min­i­mal jit­ter and the ex­pec­ta­tions for the beam­lines com­mis­sion­ing re­gard­ing de­tec­tor and un­du­la­tor syn­chro­niza­tion.  
slides icon Slides MO2AO07 [2.432 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-ICALEPCS2023-MO2AO07  
About • Received ※ 06 October 2023 — Revised ※ 07 October 2023 — Accepted ※ 12 December 2023 — Issued ※ 19 December 2023
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TUPDP006 System Identification Embedded in a Hardware-Based Control System with CompactRIO controls, FPGA, experiment, real-time 489
 
  • T.R. Silva Soares, J.L. Brito Neto, J.P.S. Furtado, R.R. Geraldes
    LNLS, Campinas, Brazil
  
  The de­vel­op­ment of in­no­v­a­tive model-based de­sign high band­width mecha­tronic sys­tems with strin­gent per­for­mance spec­i­fi­ca­tions has be­come ubiq­ui­tous at LNLS-Sir­ius beam­lines. To achieve such un­prece­dent spec­i­fi­ca­tions, closed loop con­trol ar­chi­tec­ture must be im­ple­mented in a fast, flex­i­ble and re­li­able plat­form such as NI Com­pactRIO (cRIO) con­troller that com­bines FPGA and real-time ca­pa­bil­i­ties. The de­sign phase and life-cy­cle man­age­ment of such mecha­tron­ics sys­tems heav­ily de­pends on high qual­ity ex­per­i­men­tal data ei­ther to en­able rapid pro­to­typ­ing, or even to im­ple­ment con­tin­u­ous im­prove­ment process dur­ing op­er­a­tion. This work aims to pre­sent and com­pare dif­fer­ent tech­niques to stim­u­lus sig­nal gen­er­a­tion ap­proach­ing Schroeder phas­ing and Tukey win­dow­ing for bet­ter crest fac­tor, sig­nal-to-noise ratio, min­i­mum mecha­tronic stress, and plant iden­ti­fi­ca­tion. Also show the Lab­VIEW im­ple­men­ta­tion to en­able em­bed­ded­ing this frame­work that re­quires spe­cific sig­nal syn­chro­niza­tion and pro­cess­ing on the main ap­pli­ca­tion con­tain­ing a hard­ware-based con­trol ar­chi­tec­ture, in­creas­ing sys­tem di­ag­nos­tic and main­te­nance abil­ity. Fi­nally, ex­per­i­men­tal re­sults from the High-Dy­namic Dou­ble-Crys­tal Mono­chro­ma­tor (HD-DCM-Lite) of QUATI (quick ab­sorp­tion spec­troscopy) and SA­PU­CAIA (small-an­gle scat­ter­ing) beam­lines and from the High-Dy­namic Cryo­genic Sam­ple Stage from SAPOTI (multi-an­a­lyt­i­cal X-ray tech­nique) of CARNAÚBA beam­line are also pre­sented in this paper.  
poster icon Poster TUPDP006 [0.766 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-ICALEPCS2023-TUPDP006  
About • Received ※ 06 October 2023 — Revised ※ 08 October 2023 — Accepted ※ 09 December 2023 — Issued ※ 13 December 2023
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THMBCMO08 whatrecord: A Python-Based EPICS File Format Tool EPICS, database, controls, PLC 1206
 
  • K.R. Lauer
    SLAC, Menlo Park, California, USA
  
  Funding: This work is supported by Department of Energy contract DE-AC02-76SF00515.
wha­trecord is a Python-based pars­ing tool for in­ter­act­ing with a va­ri­ety of EPICS file for­mats, in­clud­ing R3 and R7 data­base files. The pro­ject aims for com­pli­ance with epics-base by using Lark gram­mars that closely re­flect the orig­i­nal Lex/Yacc gram­mars. It of­fers a suite of tools for work­ing with its sup­ported file for­mats, with con­ve­nient Python-fac­ing dat­a­class ob­ject rep­re­sen­ta­tions and easy JSON se­ri­al­iza­tion. A pro­to­type back­end web server for host­ing IOC and record in­for­ma­tion is also in­cluded as well as a Vue.​js-based fron­tend, an EPICS build sys­tem Make­file de­pen­dency in­spec­tor, a sta­tic an­a­lyzer-of-sorts for startup scripts, and a host of other things that the au­thor added at whim to this side pro­ject. 		 
slides icon Slides THMBCMO08 [1.442 MB]  
poster icon Poster THMBCMO08 [1.440 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-ICALEPCS2023-THMBCMO08  
About • Received ※ 03 October 2023 — Revised ※ 24 October 2023 — Accepted ※ 14 December 2023 — Issued ※ 21 December 2023
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THMBCMO29 Motion Controls for ORNL Neutron Science Experimental Beamlines controls, EPICS, software, experiment 1261
 
  • X. Geng, A. Groff, M.R. Pearson, G. Taufer
    ORNL, Oak Ridge, Tennessee, USA
  
  Funding: ORNL is managed by UT-Battelle, LLC, under contract DE-AC05-00OR22725 for the U. S. Department of Energy
This paper pre­sents a com­pre­hen­sive overview of the mo­tion con­trol sys­tems em­ployed within the neu­tron sci­ence user fa­cil­i­ties at Oak Ridge Na­tional Lab­o­ra­tory (ORNL). The Spal­la­tion Neu­tron Source (SNS) and the High Flux Iso­tope Re­ac­tor (HFIR) at ORNL have a total of 35 neu­tron beam lines with nu­mer­ous mo­tors for mo-tion con­trol. The mo­tion sys­tems vary in com­plex­ity from a lin­ear sam­ple po­si­tion­ing stage to multi-axis end sta­tions. To en­hance the ca­pa­bil­i­ties of these mo­tion sys­tems, a con­certed ef­fort has been made to es­tab­lish stan­dard­ized hard­ware and flex­i­ble soft­ware that im­prove per­for­mance, in­crease re­li­a­bil­ity and pro­vide the ca­pa­bil­ity for au­to­mated ex­per­i­ments. The re­port dis­cusses the var­i­ous mo­tion con­trollers used, the EPICS-based IOCs (Input Out­put Con­trollers), high-level mo­tion soft­ware, and plans for on­go­ing up­grades and new pro­jects. 		 
slides icon Slides THMBCMO29 [1.893 MB]  
poster icon Poster THMBCMO29 [6.483 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-ICALEPCS2023-THMBCMO29  
About • Received ※ 05 October 2023 — Revised ※ 10 October 2023 — Accepted ※ 13 December 2023 — Issued ※ 22 December 2023
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THMBCMO30 Using ArUco Codes for Beam Spot Analysis with a Camera at an Unknown Position EPICS, detector, MMI, controls 1264
 
  • W. Smith, M. Arce, M. Bär, M. Gorgoi, C.E. Jimenez, I. Rudolph
    HZB, Berlin, Germany
  
  Mea­sur­ing the focus size and po­si­tion of an X-ray beam at the in­ter­ac­tion point in an syn­chro­tron beam­line is a crit­i­cal pa­ra­me­ter that is used when plan­ning ex­per­i­ments and when de­ter­min­ing if a beam­line is achiev­ing it’s de­sign goals. Com­monly this is per­formed using a ded­i­cated UHV "focus cham­ber" com­pris­ing a flu­o­res­cent screen at an ad­justable cal­i­brated dis­tance from the mount­ing flange and a cam­era on the same axis as the beam. Hav­ing to in­stall a large piece of hard­ware makes reg­u­lar checks pro­hib­i­tively time con­sum­ing. A flu­o­res­cent screen can be mounted to a sam­ple holder and moved using a ma­nip­u­la­tor in the ex­ist­ing end-sta­tion and a cam­era pointed at this to show a warped ver­sion of the beam spot at the in­ter­ac­tion point. The warp­ing of the image is caused by the rel­a­tive po­si­tion of the cam­era to the screen, which is dif­fi­cult to de­ter­mine and can change and come out of cam­era focus as the ma­nip­u­la­tor is moved. This paper pro­poses a so­lu­tion to this prob­lem using ArUco codes printed onto a flu­o­res­cent screen which pro­vide a ref­er­ence in the image. Ref­er­ence points from the ArUco codes are re­cov­ered from an image and used to cor­rect warp­ing and pro­vide a cal­i­bra­tion in real time using an EPICS AreaD­e­tec­tor plu­gin using OpenCV. This analy­sis is presently in com­mis­sion­ing and aims to char­ac­terise the beam spots at the dual-colour beam­line of the EMIL lab­o­ra­tory at BESSY II.  
slides icon Slides THMBCMO30 [4.674 MB]  
poster icon Poster THMBCMO30 [0.942 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-ICALEPCS2023-THMBCMO30  
About • Received ※ 16 September 2023 — Revised ※ 10 October 2023 — Accepted ※ 13 October 2023 — Issued ※ 22 October 2023
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