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SUMMARY:Light only Liquid Xenon (LoLX) experiment
DTSTART;VALUE=DATE-TIME:20210831T162500Z
DTEND;VALUE=DATE-TIME:20210831T164000Z
DTSTAMP;VALUE=DATE-TIME:20260511T000534Z
UID:indico-contribution-15479@indico.ific.uv.es
DESCRIPTION:Speakers: Liang Xie (TRIUMF)\nThe Light only Liquid Xenon (LoL
 X) experiment was designed to study light production in liquid xenon durin
 g the first nanosecond and gain experience with the operation of a large n
 umber of closely spaced Silicon Photomultipliers (SiPMs) in liquid xenon. 
 The LoLX detector is a 3D printed octagonal chamber housing 96 Hamamatsu V
 UV4 SiPMs\, 16 on top and bottom and 8 on each side of the octagon. A β-s
 ource Sr-90 is inserted in the middle of the chamber. Most (88) SiPMs are 
 covered by long pass filters preventing transmission of light below 225nm\
 , and are to be used for isolating the Cerenkov light. 4 SiPMs are uncover
 ed and 4 are covered by a band pass filter centered at the xenon scintilla
 tion wavelength. Results will be presented including a measure of the beta
  decays with the combined scintillation and Cerenkov channels. The focus o
 f the current phase of the experiment is to demonstrate spectral separatio
 n of Cerenkov and scintillation which is a prerequisite for studying scint
 illation during the first ns. LoLX will be upgraded in 2021 to achieve abo
 ut 100ps timing resolution as opposed to about 1ns currently achieved. Eve
 ntually digital SiPMs will be used in an attempt to reach 10ps single phot
 on timing resolution. The LoLX results will also include a study of SiPM e
 xternal cross-talk\, where photons produced by a charge avalanche in a SiP
 M trigger an avalanche in another. The unique shape of the chamber offers 
 opportunity to study external crosstalk at varying angles and distances. N
 ot only will LoLX results help predict the performances of the nEXO experi
 ment but also determine if early light measurement carry valuable informat
 ion for better timing and possibly energy resolutions\, to improve particl
 e identification.\n\nhttps://indico.ific.uv.es/event/6178/contributions/15
 479/
LOCATION:
URL:https://indico.ific.uv.es/event/6178/contributions/15479/
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