Single Crystal CVD Diamond Detectors: Position and Temporal Response Measurements using a Synchrotron Microbeam Probe
- PDF / 418,255 Bytes
- 7 Pages / 612 x 792 pts (letter) Page_size
- 75 Downloads / 249 Views
1039-P06-02
Single Crystal CVD Diamond Detectors: Position and Temporal Response Measurements using a Synchrotron Microbeam Probe John Morse1, Murielle Salomé1, Eleni Berdermann2, Michal Pomorski2, James Grant3, Val O'Shea3, and Petr Ilinski4 1 Experiments Division, European Synchrotron Radiation Facility, 6 rue Jules Horowitz, Grenoble, 38240, France 2 Detektorlabor, Gesellschaft für Schwerionenforschung, Planckstrasse 1, Darmstadt, 64291, Germany 3 Physics and Astronomy, University of Glasgow, University Avenue, Glasgow, G128QQ, United Kingdom 4 HASYLAB, Deutsches Elektronen-Synchrotron, Notkestraße 85, Hamburg, D-22607, Germany ABSTRACT Ultrapure, homoeptaxially grown CVD single crystal diamond is a material with great potential for the fabrication of ionizing radiation detectors for high energy, heavy ion physics, and realtime dosimetry for radiotherapy. Only diamond has suitable transmission properties and can offer the required radiation hardness for synchrotron X-ray beam monitoring applications. We report on experiments made using a synchrotron X-ray microbeam probe to investigate the performance of single crystal diamonds operated as position sensitive, solid state ‘ionization chambers’. We show that for a wide range of electric fields >0.3Vµm-1, suitably prepared devices give excellent spatial response uniformity and time stability. With an applied field of 2Vµm-1 complete charge collection times are ~1nsec for a diamond plate thickness of 100µm. Position sensitivity was obtained for an X-ray beam incident on the isolation gap between adjacent electrodes of a quadrant device: here, a crossover response region that results from charge carrier diffusion extends over ~20µm. Using GHz bandwidth signal processing electronics, the signal charge collection process was measured with spatial and temporal resolutions of 1µm and
Data Loading...
