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SUMMARY:Study of He-CF4-isobutane mixtures for directional dark matter sea
 rches with the CYGNO Time Projection Chamber
DTSTART;VALUE=DATE-TIME:20210901T171500Z
DTEND;VALUE=DATE-TIME:20210901T173000Z
DTSTAMP;VALUE=DATE-TIME:20260514T232059Z
UID:indico-contribution-15904@indico.ific.uv.es
DESCRIPTION:Speakers: Fernando Amaro (LIBPys - Coimbra University)\nCYGNO 
 is developing a gaseous Time Projection Chamber (TPC)\, which will be host
 ed at Laboratori Nazionali del Gran Sasso\, Italy\, and will rely on a tri
 ple Gas Electron Multiplier (GEM) stack for charge multiplication and elec
 troluminescence (EL) production. The EL will be collected with a high reso
 lution scientific camera for particle identification and 2D track reconstr
 uction\, with the aim of discriminating nuclear recoils and their directio
 n. \nThis work aims at determining how the addition of small percentages o
 f isobutane to the He-CF4 (60/40) select CYGNO TPC gas mixture influences 
 the EL yield\, charge gain and energy resolution. A Large Area Avalanche P
 hotodiode (LAAPD) was used to readout the EL produced in the avalanches of
  a single GEM.  Isobutane fractions up to 5% were added to the CYGNO He/CF
 4 (60/40) base mixture.\nOur results show that the inclusion of isobutane 
 does not severely compromise the amount of EL photons detected\, while mai
 ntaining the energy resolution and increasing the charge gain of the CYGNO
  He-CF4 (60/40) base mixture.\n\nhttps://indico.ific.uv.es/event/6178/cont
 ributions/15904/
LOCATION:
URL:https://indico.ific.uv.es/event/6178/contributions/15904/
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