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SUMMARY:DEPFET at Belle II
DTSTART;VALUE=DATE-TIME:20140225T053000Z
DTEND;VALUE=DATE-TIME:20140225T055500Z
DTSTAMP;VALUE=DATE-TIME:20260613T063020Z
UID:indico-contribution-32@indico.inp.nsk.su
DESCRIPTION:Speakers: Felix Mueller (Max-Planck-Institute for Physics)\nTh
 e innermost detector of the Belle II experiment makes use of the DEPFET te
 chnology to provide the accurate position measurements that are needed for
  the reconstruction of B-meson decay vertices. This technology combines si
 gnal detection and amplification in a single silicon pixel structure\, so 
 that the position measurement of traversing particles can be achieved with
  an overall material budget of 0.075% radiation length\, corresponding to 
 75 μm² in order to minimize the impact of multiple scattering for low tr
 ansverse momentum tracking. Moreover\, the DEPEFT detector has an excellen
 t signal-to-noise ratio\, low power consumption and offers a non-destructi
 ve readout.\nThe instantaneous luminosity of 8x10³⁵ cm⁻²s⁻¹ expec
 ted at SuperKEKB increases the event rate and causes a large background. T
 he close proximity of the pixel detector to the beampipe (only 1.4 cm from
  the interaction point) poses many challenges to the detector technology\,
  in particular to radiation hardness and electronics. The vertex pixel det
 ector consists of two DEPFET layers (radii at 14 mm and 22 mm).\nThese are
  20 ladders in total corresponding to 8 Mega Pixels (pixel sizes: 50x55 μ
 m² and 50x75 μm²). The four-fold readout in rolling shutter mode result
 s in a total readout time of about 20 μs for an entire frame. The concept
  of the sensor and the surrounding readout electronics will be presented i
 n detail with focus on the Belle II experiment. 17 institutes from Europe 
 and Asia work together in the DEPFET collaboration to meet these challenge
 s.\n\nhttps://indico.inp.nsk.su/event/0/contributions/32/
LOCATION:
URL:https://indico.inp.nsk.su/event/0/contributions/32/
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