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SUMMARY:The Ultra Lightweight Support Structure and Gaseous Helium Cooling
  for the Mu3e Silicon Pixel Tracker
DTSTART;VALUE=DATE-TIME:20140225T085500Z
DTEND;VALUE=DATE-TIME:20140225T091500Z
DTSTAMP;VALUE=DATE-TIME:20260608T053005Z
UID:indico-contribution-54@indico.inp.nsk.su
DESCRIPTION:Speakers: Dirk Wiedner (Physikalisches Institut der Universita
 et Heidelberg)\nThe Mu3e experiment searches for charged lepton flavor vio
 lation in the rare decay μ→eee. In order to reach a sensitivity of bett
 er than 10⁻¹⁶\, more than 10⁹ muon decays per second have to be obs
 erved over a running time of one year. Precise determination of particle m
 omentum\, vertex position and time are necessary for background suppressio
 n. These requirements can be met by combining an ultra-lightweight tracker
  based on High-Voltage Monolithic Active Pixel Sensors (HVMAPS) with a tim
 ing system which consists of a scintillating fiber detector and a tile hod
 oscope. As the momentum of particles from muon decay is below 53 MeV/c\, t
 he silicon pixel tracker resolution is dominated by multiple Coulomb scatt
 ering. This leads to extreme requirements for the material budget of the t
 racking detector of below 0.1% of a radiation length per layer. Even thoug
 h the target power consumption of the HVMAPS detector is as low as 150 mW/
 cm²\, the detector cooling must be very efficient and at the same time av
 oid adding material inside the active tracking volume. In this presentatio
 n the ultra-lightweight support structure and the gaseous helium cooling s
 ystem for the thin silicon pixel tracker will be discussed.\n\nhttps://ind
 ico.inp.nsk.su/event/0/contributions/54/
LOCATION:
URL:https://indico.inp.nsk.su/event/0/contributions/54/
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