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SUMMARY:A Low Mass On-chip Readout Scheme for Double-sided Silicon Strip D
 etectors
DTSTART;VALUE=DATE-TIME:20120503T180000Z
DTEND;VALUE=DATE-TIME:20120503T190000Z
DTSTAMP;VALUE=DATE-TIME:20130521T204756Z
UID:indico-contribution-13@cern.ch
DESCRIPTION:Speakers: Mr. IRMLER\, Christian (HEPHY Vienna)\nB-factories l
 ike the KEK-B in Tsukuba\, Japan\, operate at relatively low energies and 
 thus require detectors with very low material budget inside the sensitive 
 volume in order to minimize multiple scattering. On the other hand\, front
 -end chips with short shaping time like the APV25 have to be placed as clo
 se to the sensor strips as possible to avoid excessive noise\, which is ma
 inly caused by the capacitive load of the input amplifiers.\nIn order to a
 chieve both - minimal material budget and low noise - we developed a reado
 ut scheme for double-sided silicon detectors\, where the APV25 chips are p
 laced on a single flexible circuit\, which is glued onto the sensor. While
  the top-side strips are directly connected to the chips by wire-bonding a
 nd a small pitch adapter\, those of the bottom-side are attached by two fl
 exible circuits\, which are bent around the edge of the sensor. \nThis so-
 called “Origami” design will be utilized to build the Silicon Vertex D
 etector of the future Belle II experiment\, which will consist of 4 layers
  made from ladders with up to five double-sided silicon strip sensors in a
  row. Each ladder will be supported by two carbon fiber reinforced ribs\, 
 with a very light-weight Airex styrofoam core.\nPlacing the readout chip o
 nto the sensor also requires sufficient cooling\, which will be done by a 
 highly efficient two-phase CO2 system. Thanks to the Origami concept\, all
  APV chips inside the active Volume are aligned in a row and thus can be c
 ooled by a single thin cooling pipe per ladder.\nWe will present the conce
 pt and the assembly procedure of the Origami chip-on-sensor modules\, and 
 show results of beam tests which were performed at CERN on prototype modul
 es.\n\nhttp://indico.cern.ch/contributionDisplay.py?contribId=13&sessionId
 =6&confId=154525
LOCATION:INFN Pisa
URL:http://indico.cern.ch/contributionDisplay.py?contribId=13&sessionId=6&
 confId=154525
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