H.Chr. Kästli

Publications (4)1.21 Total impact

• Article: CMS barrel pixel detector overview

  H.Chr. Kästli, W. Bertl, W. Erdmann, K. Gabathuler, Ch. Hörmann, R. Horisberger, S. König, D. Kotlinski, B. Meier, P. Robmann, T. Rohe, S. Streuli
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  ABSTRACT: The pixel detector is the innermost tracking device of the CMS experiment at the LHC. It is built from two independent subdevices, the pixel barrel and the end disks. The barrel consists of three concentric layers around the beam pipe with mean radii of 4.4, 7.3 and 10.2 cm. There are two end disks on each side of the interaction point at ±34.5 and .This article gives an overview of the pixel barrel detector, its mechanical support structure, electronics components, services and its expected performance.
  Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment.
• Article: Building CMS pixel barrel detector modules

  S. König, Ch. Hörmann, R. Horisberger, B. Meier, T. Rohe, S. Streuli, R. Weber, H.Chr. Kästli, W. Erdmann
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  ABSTRACT: For the barrel part of the CMS pixel tracker about 800 silicon pixel detector modules are required. The modules are bump bonded, assembled and tested at the Paul Scherrer Institute. This article describes the experience acquired during the assembly of the first ∼200 modules.
  Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 582(3):776-780. · 1.21 Impact Factor
• Source

  Available from: arxiv.org

  Article: Design and performance of the CMS pixel detector readout chip

  H.Chr. Kästli, M. Barbero, W. Erdmann, Ch. Hörmann, R. Horisberger, D. Kotlinski, B. Meier
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  ABSTRACT: The readout chip for the CMS pixel detector has to deal with an enormous data rate. On-chip zero suppression is inevitable and hit data must be buffered locally during the latency of the first level trigger. Dead-time must be kept at a minimum. It is dominated by contributions coming from the readout. To keep it low an analog readout scheme has been adopted where pixel addresses are analog coded.We present the architecture of the final CMS pixel detector readout chip with special emphasis on the analog readout chain. Measurements of its performance are discussed.
  Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment.
• Article: Design and test of the CMS pixel readout chip

  M. Barbero, W. Bertl, G. Dietrich, A. Dorokhov, W. Erdmann, K. Gabathuler, St. Heising, Ch. Hörmann, R. Horisberger, H.Chr. Kästli, D. Kotlinski, B. Meier, R. Weber
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  ABSTRACT: The readout chip for the CMS pixel detector must handle an enormous flux of data, while keeping the data loss at a minimum. Full size prototype readout chips bump-bonded to sensors have been tested in a pion beam simulating an LHC-like environment, and the data loss as a function of particle fluence has been measured.
  Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment.