Precision scans of the Pixel cell response of double sided 3D Pixel detectors to pion and X-ray beams
| Autor: | Giulio Pellegrini, V.V. Gligorov, J Marchal, E.N. Gimenez, Malcolm John, P. Collins, Dzmitry Maneuski, David Pennicard, Eduardo Rodrigues, R. Dumps, A. Mac Raighne, Graeme Stewart, Jan Buytaert, Lukas Tlustos, M. Crossley, Nicola Tartoni, R. Plackett, Kawal Sawhney, L. Alianelli, Kazuyoshi Carvalho Akiba, M Nicol, M. Campbell, C. Fleta, A. Gallas, Marco Gersabeck, M. van Beuzekom, Richard Bates, C. Parkes, Manuel Lozano, Lars Eklund, X. Llopart |
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| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
Physics
Pixel 010308 nuclear & particles physics business.industry Physics::Instrumentation and Detectors X-ray detector 01 natural sciences 7. Clean energy Super Proton Synchrotron Synchrotron law.invention Charge sharing Optics Planar law 0103 physical sciences Optoelectronics Detectors and Experimental Techniques 010306 general physics business Instrumentation Radiation hardening Mathematical Physics Beam (structure) |
| ISSN: | 1748-0221 |
| Popis: | Three-dimensional (3D) silicon sensors offer potential advantages over standard planar sensors for radiation hardness in future high energy physics experiments and reduced charge-sharing for X-ray applications, but may introduce inefficiencies due to the columnar electrodes. These inefficiencies are probed by studying variations in response across a unit pixel cell in a 55μm pitch double-sided 3D pixel sensor bump bonded to TimePix and Medipix2 readout ASICs. Two complementary characterisation techniques are discussed: the first uses a custom built telescope and a 120GeV pion beam from the Super Proton Synchrotron (SPS) at CERN; the second employs a novel technique to illuminate the sensor with a micro-focused synchrotron X-ray beam at the Diamond Light Source, UK. For a pion beam incident perpendicular to the sensor plane an overall pixel efficiency of 93.0±0.5% is measured. After a 10o rotation of the device the effect of the columnar region becomes negligible and the overall efficiency rises to 99.8±0.5%. The double-sided 3D sensor shows significantly reduced charge sharing to neighbouring pixels compared to the planar device. The charge sharing results obtained from the X-ray beam study of the 3D sensor are shown to agree with a simple simulation in which charge diffusion is neglected. The devices tested are found to be compatible with having a region in which no charge is collected centred on the electrode columns and of radius 7.6±0.6μm. Charge collection above and below the columnar electrodes in the double-sided 3D sensor is observed. © 2011 IOP Publishing Ltd and SISSA. |
| Databáze: | OpenAIRE |
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