Keyword: software
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TUPH33 Vibration Measurement & Simulation of Magnet & Girder in SESAME experiment, quadrupole, dipole, controls 111
 
  • M.M. Al Shehab
    SESAME, Amman, Jordan
  
  Funding: IAEA
SESAME (Syn­chro­tron-light for Ex­per­i­men­tal Sci­ence and Ap­pli­ca­tions in the Mid­dle East) started op­er­a­tion in Jan­u­ary 2017. Dur­ing the de­sign phase sev­eral FEA stud­ies were per­formed to op­ti­mize the girder and the mag­net de­sign tak­ing into ac­count all the con­straints such as the tight spac­ing be­tween mag­nets, the vac­uum cham­ber in­stal­la­tion in­ter­ac­tions with the mag­nets. In this paper the ex­per­i­men­tal and Nu­mer­i­cal modal analy­sis are pre­sented as well as the re­sult com­par­i­son be­tween the ex­per­i­men­tal and sim­u­la­tion work. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH33  
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WEPH06 Upgrade of Magnetic Measurements Laboratory at ALBA Synchrotron controls, hardware, TANGO, MMI 211
 
  • J. Campmany, F. Becheri, J. Marcos, V. Massana, R. Petrocelli, L. Ribó
    ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
  
  Along 2017 and 2018, a com­plete up­grade of ALBA mag­netic mea­sure­ments lab has been done. Up­grade has af­fected both hard­ware and soft­ware. Re­gard­ing hard­ware, a rel­e­vant in­no­va­tion has been the re­place­ment of DC mo­tors by step mo­tors in new Hall probe bench and in flip­ping and ro­tat­ing coil benches. Up to now, this kind of con­tin­u­ous mea­sure­ments usu­ally were done using DC mo­tors be­cause step mo­tors were con­sid­ered un­able to ful­fil the re­quired smooth­ness of the move­ment. How­ever, cur­rent step mo­tors state of the art made them com­pat­i­ble with DC. In our case, we have tested the per­for­mance of up­graded benches and they reach the same ac­cu­racy, or even bet­ter. Re­gard­ing soft­ware, we have uni­fied all mo­tion dri­vers to ICEPAP and all con­trol sys­tem to Tango pack­age, tak­ing ad­van­tage of the last ICEPAP firmware. That in­cludes the fea­ture of trig­ger­ing data ac­qui­si­tion sys­tem by sig­nals gen­er­ated from dif­fer­ent axis that can be se­lected by soft­ware.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH06  
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WEPH07 Photon Beam Applied as Heat Flux on Irregular Surfaces in FEA photon, operation, simulation, radiation 214
 
  • D. Capatina
    ANL, Argonne, Illinois, USA
  
  Funding: Work at the Advanced Photon Source is supported by the U. S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357.
The light source front ends and beam­lines con­tain sev­eral de­vices de­signed to limit the size of, or com­pletely stop, the pho­ton beam. Most of these de­vices are meant to pro­tect per­son­nel and/or equip­ment, thus their fail­ure would have se­ri­ous im­pli­ca­tions for the fa­cil­ity op­er­a­tion. The pho­ton beam car­ries ex­tremely high en­ergy, thus the sys­tem will ex­pe­ri­ence very large ther­mal loads. Ac­cu­rate tem­per­a­ture and stress dis­tri­b­u­tion of these com­po­nents, based on well-rea­soned as­sump­tions, is needed to ac­cu­rately re­view the per­for­mance of these de­vices dur­ing the de­sign process. Ap­ply­ing nonuni­form heat flux as a ther­mal load in sim­u­la­tion pre­sents a chal­lenge. This work de­scribes the steps of the ther­mo­me­chan­i­cal nu­mer­i­cal sim­u­la­tion for a typ­i­cal com­po­nent at the Ad­vanced Pho­ton Source (APS), sub­ject to pho­ton beam in­ter­cep­tion. The nu­mer­i­cal al­go­rithm used to apply the nonuni­form heat flux dis­tri­b­u­tion on an ir­reg­u­lar type of sur­face is pre­sented in de­tail. The al­go­rithm was de­vel­oped using the com­mer­cial Fi­nite El­e­ment Analy­sis (FEA) soft­ware ANSYS of ANSYS, Inc. 		 
poster icon Poster WEPH07 [0.636 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH07  
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WEPH14 Optomechanical Optimization for a Sagittaly Bent Double Crystal Monochromator, Using Finite Elements and Ray Tracing photon, focusing, synchrotron, radiation 231
 
  • N. Jobert, E. Fonda, T. Moreno, M. Ribbens
    SOLEIL, Gif-sur-Yvette, France
  
  De­sign­ing a sec­ond crys­tal for a sagit­tally bent Dou­ble Crys­tal Mono­chro­ma­tor (DCM) re­quires deal­ing with a num­ber of con­flict­ing re­quire­ments. Es­pe­cially when work­ing with high-en­ergy pho­tons, the an­gu­lar aper­ture (Dar­win width) be­comes very nar­row (below 10µrad for Si) while si­mul­ta­ne­ously the bend­ing ra­dius is in­creas­ing small (down to 1m for typ­i­cal beam­line di­men­sions at 40keV). In this sit­u­a­tion, the cross-talk be­tween tan­gen­tial and sagit­tal cur­va­ture be­comes a key pa­ra­me­ter, and two strate­gies are gen­er­ally used to over­come the issue: ei­ther using a flat crys­tal with a spe­cific length/with ratio, or usage of a rib-stiff­ened crys­tal. In the frame of the up­grade of the SAMBA beam­line DCM, both so­lu­tions have been ex­plored, using a suite of scripts con­nect­ing a gen­eral pur­pose FEM code (ANSYS) and a ray-trac­ing code (SpotX). This has al­lowed a sys­tem­atic eval­u­a­tion of a wide num­ber of con­fig­u­ra­tions, giv­ing in­sight in the in­ter­ac­tion be­tween geo­met­ric pa­ra­me­ters, and ul­ti­mately re­sult­ing in a twofold in­crease in the pho­ton through­put at 30keV with­out com­pris­ing nei­ther spec­tral res­o­lu­tion nor spot size at sam­ple lo­ca­tion.  
poster icon Poster WEPH14 [3.378 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH14  
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WEPH15 Experimental Modal Analysis Vibration Measurement to Inform Engineering Design resonance, damping, experiment, background 235
 
  • J.H. Kelly
    DLS, Oxfordshire, United Kingdom
  
  Ex­per­i­men­tal Modal Analy­sis was per­formed on an ex­ist­ing 5 de­gree of free­dom mir­ror sys­tem on beam­line I08 at The Di­a­mond Light Source, by im­pact­ing the struc­ture and mea­sur­ing the re­sponse at lo­ca­tions of in­ter­est. Com­mer­cial soft­ware was used to gen­er­ate the fre­quency re­sponse func­tions and mode shape an­i­ma­tions. This ex­per­i­men­tal in­for­ma­tion was used to in­form and op­ti­mise a de­sign it­er­a­tion for a new mir­ror sys­tem. The new mech­a­nism was de­signed, in­stalled and tested on the J08 branch line at The Di­a­mond Light Source to val­i­date the ex­pected im­prove­ments in sta­bil­ity, stiff­ness and res­o­nant fre­quency. The mir­ror sys­tem fun­da­men­tal res­o­nant fre­quency was sig­nif­i­cantly in­creased from 20 Hz to 49 Hz.  
poster icon Poster WEPH15 [0.411 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH15  
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THPH23 Interlock System for a Magnetic-Bearing Pulse Selector controls, PLC, GUI, operation 385
 
  • H. Ishii, J. Adachi, T. Kosuge, H. Tanaka
    KEK, Ibaraki, Japan
  
  A hy­brid op­er­a­tion mode that en­ables beam time shar­ing be­tween sin­gle-bunch users and multi-bunch users has been in­tro­duced in the PF 2.5GeV ring of KEK (High En­ergy Ac­cel­er­a­tor Re­search Or­ga­ni­za­tion). A pulse se­lec­tor, a kind of op­ti­cal chop­per, is used to per­mit the pas­sage only of an X-ray pulse that comes from a sin­gle bunch part of the hy­brid fill­ing pat­tern. We have de­vel­oped a new pulse se­lec­tor with a mag­netic bear­ing. It com­prises a ro­tat­ing dish-shaped disk, a phase-lock-loop (PLL) con­trolled motor sys­tem, and other parts . The speed and phase of the ro­tat­ing disk is con­trolled by TTL sig­nals ob­tained by di­vid­ing the RF sig­nal of the PF 2.5 GeV ring. A com­mer­cially avail­able motor dri­ver was de­signed for lower load­ing. The ro­tat­ing disk for the pulse se­lec­tor is heav­ier than those disks used pre­vi­ously in which air bear­ings are used. A rapid de­cel­er­a­tion of the ro­ta­tion causes prob­lems through a large cur­rent flow back to the motor dri­ver. In this study, we de­scribe the pro­to­type of a pro­gram­ma­ble logic con­troller based on an in­ter­lock sys­tem to avoid the cur­rent flow back prob­lem in the pulse se­lec­tor.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH23  
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