Wuppertal 2015 – scientific programme

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T: Fachverband Teilchenphysik

T 43: Halbleiter: Belle, Germanium, Diamant

T 43.4: Talk

Tuesday, March 10, 2015, 17:30–17:45, G.10.05 (HS 7)

Comprehensive studies on irradiated single-crystal diamond sensors — •Martin Stegler — DESY, Zeuthen, Germany

Single-crystal diamond sensors are used as part of the Beam and Radiation Instrumentation and Luminosity (BRIL) projects of the CMS experiment. Due to an upgrade of the Fast Beam Conditions Monitor (BCM1F) these diamond sensors are exchanged and the irradiated ones are now used for comprehensive studies. Current over voltage (IV), current over time (CT) and charge collection efficiency (CCE) measurements were performed for a better understanding of the radiation damage incurred during operation and to compensate in the future. The effect of illumination with various light sources on the charge collection efficiency was investigated and led to interesting results. Intensity and wavelength of the light were varied for deeper insight of polarization effects.