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DTSTAMP:20260412T104433
DTSTART:20170510T103000
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URL:https://murmitoyen.com/events/vanille/udem/detail/765098-understanding-
 backgrounds-and-thresholds-to-optimize-searches-for-dark-matter-alan-robin
 son-fermilab
LOCATION:Université de Montréal - Pavillon Claire-McNicoll\, 2900\, chemi
 n de la Tour\, Montréal\, QC\, Canada\, H3T 1J6
SUMMARY:Understanding backgrounds and thresholds to optimize searches for d
 ark matter - Alan Robinson (Fermilab)
DESCRIPTION:A beam of unknown massive particles\, dark matter\, passes thro
 ugh the earth and through many experiments attempting to measure its inte
 ractions.  Two figures of merit define the sensitivity of these experime
 nts to a possible interaction: the minimum detectable interaction rate (b
 ackground)\, and the minimum detectable interaction energy (threshold).  
 My studies of the thresholds and principle backgrounds of PICO bubble cham
 bers and SuperCDMS cryogenic detectors have relied on understanding the p
 rinciples of fluid dynamics\, nuclear physics\, electron microscopy\, phy
 sical chemistry\, solid-state band structures\, and x-ray crystallography
 .  These studies have led to the development of a calibration program an
 d a sensitivity model for SuperCDMS SNOLAB\, and to the ability to design
  ton-scale PICO detectors. These two technologies lead the world in the a
 bility to discover low-mass dark matter and spin-dependent interactions w
 ith dark matter.  The University of Montreal is set to take a lead role in
  developing and building large PICO bubble chambers\, where control of ne
 utron backgrounds will be critical to achieve the detector's potential. 
  The University of Montreal may also have a role in the development of n
 ew ultra-low threshold cryogenic detectors and their calibration using th
 e Tandem accelerator and other local facilities.  Understanding detector
  backgrounds and thresholds presents a continuing challenge to dark matte
 r searches.
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