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https://doi.org/10.18429/JACoW-ICALEPCS2023-TUPDP099
Title Spark Activity Monitoring for LHC Beam Dump System
Authors
  • C.B. Durmus, E. Carlier, N. Magninpresenter, T.D. Mottram, V. Senaj
    CERN, Meyrin, Switzerland
Abstract LHC Beam Dump Sys­tem is com­posed of 25 fast-pulsed mag­nets per beam to ex­tract and di­lute the beam onto an ex­ter­nal ab­sorber block. Each mag­net is pow­ered by a high volt­age gen­er­a­tor to dis­charge the en­ergy stored in ca­pac­i­tors into the mag­net by using high volt­age switches. These switches are housed in air in cab­i­nets which are not dust pro­tected. In the past years of LHC op­er­a­tion, we no­ticed elec­tri­cal sparks on the high volt­age switch due to the re­lease of ac­cu­mu­lated charges on the sur­faces of the in­su­la­tors and the switches. These sparks can po­ten­tially cause self-trig­ger of the gen­er­a­tors in­creas­ing the risk of asyn­chro­nous dumps which should be avoided as much as pos­si­ble. In order to de­tect dan­ger­ous spark ac­tiv­ity in the gen­er­a­tors be­fore a self-trig­ger oc­curs, a Spark Ac­tiv­ity Mon­i­tor­ing (SAM) sys­tem was de­vel­oped. SAM con­sists of 50 de­tec­tion and ac­qui­si­tion sys­tems de­ployed at the level of each high volt­age gen­er­a­tor, and one ex­ter­nal global sur­veil­lance process. The de­tec­tion and ac­qui­si­tion sys­tems are based on digi­tis­ers to de­tect and cap­ture spark wave­forms com­ing from cur­rent pick-ups placed in var­i­ous elec­tri­cal paths in­side each gen­er­a­tor. The global sur­veil­lance process is col­lect­ing data from all the ac­qui­si­tion sys­tems in order to as­sess the risk of self-trig­ger based on the de­tected sparks am­pli­tude and rate. This paper de­scribes the ar­chi­tec­ture, im­ple­men­ta­tion, op­ti­mi­sa­tion, de­ploy­ment and op­er­a­tional ex­pe­ri­ence of the SAM sys­tem.
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Conference ICALEPCS2023
Series International Conference on Accelerator and Large Experimental Physics Control Systems (19th)
Location Cape Town, South Africa
Date 09-13 October 2023
Publisher JACoW Publishing, Geneva, Switzerland
Editorial Board Volker RW Schaa (GSI, Darmstadt, Germany); Andy Götz (ESRF, Grenoble, France); Johan Venter (SARAO, Cape Town, South Africa); Karen White (SNS, Oak Ridge, TN, USA); Marie Robichon (ESRF, Grenoble, France); Vivienne Rowland (SARAO, Cape Town, South Africa)
Online ISBN 978-3-95450-238-7
Online ISSN 2226-0358
Received 06 October 2023
Revised 21 October 2023
Accepted 05 December 2023
Issued/td> 09 December 2023
DOI doi:10.18429/JACoW-ICALEPCS2023-TUPDP099
Pages 784-787
Copyright
Creative Commons CC logoPub­lished by JACoW Pub­lish­ing under the terms of the Cre­ative Com­mons At­tri­bu­tion 4.0 In­ter­na­tional li­cense. Any fur­ther dis­tri­b­u­tion of this work must main­tain at­tri­bu­tion to the au­thor(s), the pub­lished ar­ti­cle's title, pub­lisher, and DOI.