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SUMMARY:Pyrene-polystyrene wavelength shifters for liquid argon experiment
 s
DTSTART;VALUE=DATE-TIME:20210916T190000Z
DTEND;VALUE=DATE-TIME:20210916T191500Z
DTSTAMP;VALUE=DATE-TIME:20260418T125417Z
UID:indico-contribution-49@indico.physics.ucsd.edu
DESCRIPTION:Speakers: Hicham Benmansour (Queen's University)\nSome WIMP da
 rk matter experiments use liquid argon (LAr) as the target material for it
 s high\nscintillation light yield and good background discrimination. Part
 icle interactions in the LAr produce\nscintillation light at 128 nm which 
 must go through a wavelength shifting (WLS) material to be\ndetected by st
 andard photomultiplier tubes. Tetraphenyl-butadiene (TPB) is a common WLS 
 for LAr\nbased detectors\, including DEAP-3600\, due to its high light yie
 ld and fast scintillation time.\nPyrene-polystyrene thin films have been p
 roposed as a complementary WLS for rejection of\npathological backgrounds 
 in the detector because it has a long scintillation time and high light yi
 eld\nrelative to TPB. Light from particle interactions that reach the pyre
 ne coating will produce a pulse\nsignature distinct from interactions of l
 ight with TPB.\nWe present the characterization of the fluorescence proper
 ties of these pyrene coatings\, such as the\nlight yield\, fluorescence ti
 me\, and spectra\, as a function of temperature. These measurements were\n
 taken at the Queen’s University optical cryogenic test facility to chara
 cterize these films down to 4 K.\n\nhttps://indico.physics.ucsd.edu/event/
 1/contributions/49/
LOCATION:
URL:https://indico.physics.ucsd.edu/event/1/contributions/49/
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