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arXiv · 0810.2080

Characterization of a Single Crystal Diamond Pixel Detector in a High Energy Particle Beam

M. Mathes·M. Cristinziani·H. Kagan·S. Smith·W. Trischuk·J. Velthuis·N. Wermes
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Abstract

Diamond has been developed as a material for the detection of charged particles by ionization. Its radiation hardness makes it an attractive material for detectors operated in a harsh radiation environment e.g. close to a particle beam as is the case for beam monitoring and for pixel vertex detectors. Poly-crystalline chemical vapor deposition (CVD) diamond has been studied as strip and pixel detectors so far. We report on a first-time characterization of a single-crystal diamond pixel detector in a 100 GeV particle beam at CERN. The detectors are made from irregularly shaped single crystal sensors, 395mm thick, mated by bump bonding to a front-end readout IC as used in the ATLAS pixel detector with pixel sizes of 50 x 400 mm2. The diamond sensors show excellent charge collection properties: full collection over the entire detector volume, clean and narrow signal charge distributions with a S/N value of >100 and a hit detection efficiency of (99.9 +- 0.1)%. The measured spatial resolution for particles under normal incidence in the shorter pixel direction is (8.9 +- 0.1) um.

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M. Mathes, M. Cristinziani, H. Kagan, S. Smith, W. Trischuk, J. Velthuis, N. Wermes. 2008-11-24. Characterization of a Single Crystal Diamond Pixel Detector in a High Energy Particle Beam. https://doi.org/10.1088/1748-0221/3/12/p12002

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