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SUMMARY:NEWS-G: Detection of low mass WIMPs with Spherical Proportional Co
 unters
DTSTART;VALUE=DATE-TIME:20230906T150000Z
DTEND;VALUE=DATE-TIME:20230906T152000Z
DTSTAMP;VALUE=DATE-TIME:20260309T023141Z
UID:indico-contribution-2990@indico.tlabs.ac.za
DESCRIPTION:Speakers: Philippe Gros (Queen's University)\nNEWS-G is an exp
 eriment searching for dark matter using the Spherical Proportional Counter
  (SPC) technique. Such detectors can operate significant mass of target\, 
 of order of kgs with meter size spheres\, while keeping single ionization 
 electron detection sensitivity. They can be filled with gaseous targets of
  low atomic mass such as hydrogen\, helium\, and neon\, giving sensitivity
  to low mass WIMPs down to O(0.1GeV). Using multiple taget gases\, the det
 ector can characterise unexpected backgrounds and systematic effects.\nThe
  talk will cover principle of operations of the SPC and a description of t
 he 140cm diameter detector and compact shielding\, installed in the SNOLAB
  underground facility. The latest WIMP limits obtained with a temporary sh
 ield at the underground laboratory of Modane (LSM\, France) with methane a
 s target gases will be presented. Preliminary results from the full detect
 or at SNOLAB with additional gas mixtures will also be shown.\nThe talk wi
 ll also introduce projects to improve the SPC performance\, and expand the
 ir reach to coherent elastic neutrino-nucleus scattering (CEvNS).  \nAnoth
 er contribution to this conference describes calibration of the ionisation
  yield from nuclear recoils using smaller SPCs.\n\nhttps://indico.tlabs.ac
 .za/event/112/contributions/2990/
LOCATION: Meeting Room 2.61 - 2.63
URL:https://indico.tlabs.ac.za/event/112/contributions/2990/
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