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Summary from gas working group Kentaro Miuchi CYGNUS HAWAII meeting 2019 Jan 07,08

This summary highlights the latest developments and meetings of the Gas Working Group (GWG). Topics covered include new gas studies, resistive sheet TPC, micromegas, GEM and related gas studies, and SF6 and CF4 gas investigations. The summary also discusses potential collaborations for low background gas detectors, including low energy discrimination, internal material screening, radon removal, strip readout ASIC, and supporting simulations.

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Summary from gas working group Kentaro Miuchi CYGNUS HAWAII meeting 2019 Jan 07,08

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  1. Summary from gas working group KentaroMiuchi CYGNUSHAWAIImeeting2019Jan07,08

  2. https://indico.cern.ch/event/715651/overview • NewfromTPCParisworkshop remodeledMAGBOLTZ

  3. lowBGmicromegas

  4. NEXTmeeting4thweekofJan(31st)? CYGNASgasmeetings • 10meetingsin2018 • 10meetingsin2017 • 2meetingsin2016(startedSep.2016) sinceJune2018 Sheffield • ThickGEM+wire(Warren,Nov2018) Kobe • ResistiveSheetTPC(Kentaro,Nov2018,ParisTPC,paperinpreparation) • Garfield++(Hirohisa,Oct2018) • columnar recombination(Kiseki,June2018,2018 J. Inst. 13 P07015) NewMexico • SF6+CF4(Randy,DineshSep2018) Hawaii • GEMandrelatedgasstudy(TomOct,2018) Italy • LEMONtest(Elisaebetta,June2018)

  5. workingtogether replacedwith0.6mmpitchwires 5/8channelsworked… alpha-ray direction SheifieldGEM+wirereadbyKobeelectronics

  6. https://indico.cern.ch/event/709670/contributions/3030385/attachments/1670143/2678953/RD51_20180619_ishiura.pdfhttps://indico.cern.ch/event/709670/contributions/3030385/attachments/1670143/2678953/RD51_20180619_ishiura.pdf gain>104with3×GEMs • HirohisaIshiuraRD51 Collaboration Meeting and the “MPGD Stability” workshop, Munich 18-22 June 201818-22 June 2018Technical University of Munich

  7. http://ppwww.phys.sci.kobe-u.ac.jp/~miuchi/work/pre_int/miuchi_201812_Paris.pdfhttp://ppwww.phys.sci.kobe-u.ac.jp/~miuchi/work/pre_int/miuchi_201812_Paris.pdf promising • issues:sacle-up,stability resistivesheetTPCfieldcage • KentaroMiuchi • 9th symposium on Large TPCs for low-energy rare event detection 12-14 December 2018 Diderot University, Paris 

  8. He-CF4gain(NewMexico,Septembergasmeeting)

  9. backup

  10. MPGDsinSF6gasGWreport KentaroMiuchi Kobe Univ. CYGNUS meeting 15 June 2018 monthlymeetingnext:27thJune activediscussion thankyouverymuchforyourcontributions

  11. SF6 and MPGD Overview (as of 2018-06)updates ｉｎ red

  12. GEMvarieties

  13. highlights

  14. NewMexico Jan2018 gasmeeting

  15. Apr2018 gasmeeting

  16. Italy JINST13(2018)P04022 • Triple-GEM (50um Kapton, 70μmΦ,140μmpitchCERN) JINST13(2018)P04022 JINST13(2018)P04022

  17. Italy--fruitbasket-- Mar2018 gasmeeting Feb2018 gasmeeting LIMEincoming!?

  18. Sheffield GEM+wireconfiguration Feb2018 gasmeeting

  19. Hawaii Dec2017 gasmeeting TomThropeJune2018CYGNUSmeeting

  20. Wellesley • MicroMegasGap 256umMax Gain ~ 500 （pureSF6） Max Gain ~ 4e3(SF6+CF4)readoutwithKobeelectronics512umgaptobetested α chargepropagationonresistivestrip M.NakazawasubmittedtoNIMA

  21. Kobe • u-PIC(DNP) + GEM (100um LCP, Scienergy) Gain 2000@20Torr(, ) • Triple-GEM (100um LCP, Scienergy) 10000@120Torr () Source HV Drift Mesh(SUS) diameter 70um 10mm Drift 1kV/cm HV GEM1 HV Transfer 3.5mm HV GEM2 Transfer HV 3.5mm 100um GEM3 HV Pitch 140um Induction 2mm HV Readout HV Amp MPGD2015 T.Ikeda and CYGNUS GAS MEETING Oct 2017 1nF

  22. MolecularSievesRandD KentaroMiuchi(forHiroshiOgawa) Kobe Univ. CYGNUS meeting 15 June 2018

  23. background • CommerciallyavailableMSsweredemonstratedtoremoveradonsfromSF6bySheffieldgroup. • Theyarehighbackground,though. 5Aresults

  24. HiroshiOgawadevelopedlowBGMSs(4A)forXMASSyearsago.Andhasagoodconnectionwiththecompany.HiroshiOgawadevelopedlowBGMSs(4A)forXMASSyearsago.Andhasagoodconnectionwiththecompany. • NeilwasinterestedinmakingalowBGMSs(5A). • CouldbeajointR&Dprogram. • ~10k € investmenttostartwith.~1kgproduction. • wouldnotbeoff-the-shelfproductseveninthefuture. • interstedin?

  25. possiblecollaborativeworkforgasWG • lowenergydiscrimination(LED) • LowBGworkinternalmaterialscreeningradonremoval • readoutASICforstripreadout • measurementtosupport/argueSVEN’ssimulations • angularresolution,head/tail,tracklength,discrimination…

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