First results of the Belle II Silicon Vertex Detector readout system

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Published 2 December 2014 • © 2014 IOP Publishing Ltd and Sissa Medialab srl
, , Topical Workshop on Electronics for Particle Physics Citation M Friedl et al 2014 JINST 9 C12005 DOI 10.1088/1748-0221/9/12/C12005

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Author affiliations

1 HEPHY Vienna – Institute of High Energy Physics of the Austrian Academy of Sciences, Nikolsdorfer Gasse 18, A-1050 Vienna, Austria

2 INFN and University of Pisa, L.go B. Pontecorvo 3, 56127 Pisa, Italy

3 KEK, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan

4 Kavli Institute for Physics and Mathematics of the Universe (WPI), University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8583, Japan

5 Department of Physics, Tokyo Metropolitan University, 1-1 Minami-Oosawa Hachioji-shi, Tokyo 192-0397, Japan

6 Experimental Physics Center, Institute of High Energy Physics, Yuquan Road 19(2) Beijing 100049, China

7 Division of Particle Physics and Astrophysics, Institute of Nuclear Physics, ul. Radzikowskiego 152, 31 342 Krakow, Poland

8 Faculty of Physics, LMU Munich, Geschwister-Scholl-Platz 1, 80539 Munich, Germany

9 Department of Physics and Astronomy, University of Bonn, Nussallee 12, 53115 Bonn, Germany

Dates

  1. Received 5 November 2014
  2. Accepted 10 November 2014
  3. Published

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1748-0221/9/12/C12005

Abstract

At the heart of the Belle II experiment at KEK (Japan), there will be a Vertex Detector (VXD) composed of 2 layers of DEPFET pixels (PXD) and 4 layers of double-sided silicon strip detectors (SVD). The latter use the APV25 front-end chip — originally developed for CMS — which is reading out the inner part of the SVD sensors through the Origami chip-on-sensor concept, including a state-of-the-art two-phase CO2 cooling. The whole system (including the full DAQ chain) was successfully tested in a beam at DESY in January 2014 and first results are presented here.

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