BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Development and Construction of the Belle II TOP Detector
DTSTART;VALUE=DATE-TIME:20140226T071500Z
DTEND;VALUE=DATE-TIME:20140226T074000Z
DTSTAMP;VALUE=DATE-TIME:20260520T044739Z
UID:indico-contribution-50@indico.inp.nsk.su
DESCRIPTION:Speakers: Kazuhito Suzuki (Graduate School of Science\, Nagoya
  University)\nA Time-of-Propagation (TOP) detector is a ring-imaging Chere
 nkov detector that images a Cherenkov ring using propagation times and det
 ected x- and y-positions of Cherenkov photons. It has been developed for p
 article identification in the barrel region of the Belle II spectrometer\,
  which will probe new physics beyond the Standard Model with a luminosity 
 of 8x10³⁵/cm²/s. The TOP detector is intended to achieve good π/K sep
 aration in the momentum range up to around 3 GeV/c under the high-luminosi
 ty environment.\nThe detector construction has been started and the remain
 ing development is being finalized toward the installation into the spectr
 ometer in early 2015.\nA single detector module mainly consists of a synth
 etic silica plate\, as the Cherenkov radiator\, and an array of micro-chan
 nel plate (MCP) photomultiplier tubes (PMTs) with readout electronics. Opt
 ical components for the first detector module are being delivered one afte
 r another. The delivered components are in process of optical inspections 
 and assembly preparation. Mass production of the MCP-PMTs is on going smoo
 thly. The performance details are being inspected under the operational ma
 gnetic field of 1.5 T. Although the lifetime of an MCP-PMT has been an iss
 ue concerning the high-luminosity environment\, atomic layer deposition on
  MCPs has improved the lifetime significantly. Development of the readout 
 electronics is being finalized. Their high-speed waveform sampling ASICs a
 nd circuit board stacks are in preproduction. Preproduction for the mechan
 ical structure of a detector module is about to start. It is crucial to es
 tablish the optical and electrical contacts between the optics\, MCP-PMTs 
 and readout electronics. A beam test on a detector module prototype has be
 en carried out using a 2 GeV/c e⁺ beam at the LEPS beam line of SPring-8
  in June 2013. The\nprototype consists of the optics and MCP-PMTs that hav
 e nearly final and final specifications\, respectively. The test results h
 ave demonstrated the detector principle reasonably.\n\nhttps://indico.inp.
 nsk.su/event/0/contributions/50/
LOCATION:
URL:https://indico.inp.nsk.su/event/0/contributions/50/
END:VEVENT
END:VCALENDAR