Diamond detectors: a few facts, test beams and summer plans Marina Artuso June 15, 20101Marina Artuso SU Velo Meeting

Nomenclature June 15, 2010Marina Artuso SU Velo Meeting2 Top/substrate/big Bottom/growth/small

Comparison between OSU and SU June 15, 2010Marina Artuso SU Velo Meeting3 sensorsidehvCCL OSU (  m) [+HV] 207-2growth substrate growth (tested with Beam)substrate

June 15, 2010Marina Artuso SU Velo Meeting4 detectorsidehvCCL OSU (  m) CCL SU (  m) 207-4growth substrate growth substrate Note: –HV data should be closer to the data at OSU Note: effect of pumping? Note: more powerful source used at OSU + collimation

Study of charge collection properties June 15, 2010Marina Artuso SU Velo Meeting5 The “grazing angle technique” developed to study the field/charge collection properties of heavily irradiated silicon can shed light on the charge collection/field distribution inside the diamond. An angle of 13° corresponds to 64 strips being illuminated. We can get the whole 128 strips in 2 attempts. Efficiency issue: active area 0.3X1.4 cm^2 (1/2 of normal incidence with 128 strips).

Towards the next test beam June 15, 2010Marina Artuso SU Velo Meeting6  We need to understand reason why plate 3 does not hold 1000 HV.  We need to understand properties of plate 5, could be the best candidate for next strip deposition (with SU mask)  Calculate time requirements for the normal incidence/grazing angle data to time order and prioritize

Towards the next test beam: THE WISH LIST June 15, 2010Marina Artuso SU Velo Meeting7  Complete characterization of plate 3 at normal incidence, at 500, 1000 V, both polarities.  Orient sensor at 15° with respect beam axis