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SUMMARY:Development of a drift tube for study of a quantum mechanical scat
 tering of muons in helum gas
DTSTART;VALUE=DATE-TIME:20220901T164000Z
DTEND;VALUE=DATE-TIME:20220901T170000Z
DTSTAMP;VALUE=DATE-TIME:20220826T121947Z
UID:indico-contribution-3720@indico.stfc.ac.uk
DESCRIPTION:Speakers: Shiro MATOBA (High Energy Accelerator Research Organ
 ization)\nThe first principle calculation involving muon needs to consider
  the effect of quantum fluctuations as well and it is still in a state of 
 development. In order to verify the first principle calculation\, the basi
 c data for the collision cross section at low energy region corresponding 
 to the binding energy of the muon and the target molecule is necessary. Es
 pecially the elastic scattering cross sections and the potential energy su
 rfaces in the thermal energy region are extremely important for studying t
 he muon behavior in the envi-ronment. However\, since the collision experi
 ment in this energy region is technically difficult\, the report of experi
 mental results for the interaction between two bodies in an isolated syste
 m\, especially for the elastic scattering\, is sparse. By applying the dri
 ft tube technique to the muon collision experiment\, we consider that info
 rmation of interactions between a muon and a molecule in gas can be obtain
 ed for less than 1 eV region. \nThe positive muons (~2.7 MeV) generated ar
 e passed through an thin aluminum plate  and to decelerate it to 100 keV. 
 The decelerated muons enter the drift tube and travel a few centimeters by
  repeatedly colliding with buffer gas (~100 kPa) and then thermalizes. The
  thermalized muon travels with certain mobility toward the back due to the
  uniform electric field (~100 V/cm) applied to the inside of the drift tub
 e. After the muons travel a few centimeters from the point where it therma
 lized\, they decay to positrons. The positrons pass through the double sci
 ntillation fiber installed on the outside of the drift tube.By installing 
 the fibers in double\, the flight direction of the positron can be determi
 ned and the projection diagram to the central axis of the drift tube at th
 e decay point can be obtained.\nWe have successfully measured the muon sto
 p position at the S-line.\n\nhttps://indico.stfc.ac.uk/event/53/contributi
 ons/3720/
LOCATION:Science and Technology Campus\, University of Parma
URL:https://indico.stfc.ac.uk/event/53/contributions/3720/
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