CERN Accelerating science

Article
Report number	arXiv:1008.4107 ; FERMILAB-PUB-10-298-E ; FERMILAB-PUB-10-298-E
Title	Czochralski Silicon as a Detector Material for S-LHC Tracker Volumes
Author(s)	Spiegel, Leonard (Fermilab) ; Barvich, Tobias (KIT, Karlsruhe, EKP) ; Betchart, Burt (Rochester U.) ; Bhattacharya, Saptaparna (Brown U.) ; Czellar, Sandor (Helsinki Inst. of Phys.) ; Demina, Regina (Rochester U.) ; Dierlamm, Alexander (KIT, Karlsruhe, EKP) ; Frey, Martin (KIT, Karlsruhe, EKP) ; Gotra, Yuri (Rochester U.) ; Harkonen, Jaakko (Helsinki Inst. of Phys.) ; Hartmann, Frank (KIT, Karlsruhe, EKP) ; Kassamakov, Ivan (Helsinki Inst. of Phys.) ; Korjenevski, Sergey (Rochester U.) ; Kortelainen, Matti J. (Helsinki Inst. of Phys.) ; Lampen, Tapio (Helsinki Inst. of Phys.) ; Luukka, Panja (Helsinki Inst. of Phys.) ; Maenpaa, Teppo (Helsinki Inst. of Phys.) ; Moilanen, Henri (Helsinki Inst. of Phys.) ; Narain, Meenakshi (Brown U.) ; Neuland, Maike (KIT, Karlsruhe, EKP) ; Orbaker, Douglas (Rochester U.) ; Simonis, Hans-Jurgen (KIT, Karlsruhe, EKP) ; Steck, Pia (KIT, Karlsruhe, EKP) ; Tuominen, Eija (Helsinki Inst. of Phys.) ; Tuovinen, Esa (Helsinki Inst. of Phys.)
Publication	2011
Imprint	25 Aug 2010
Number of pages	4
Note	Comments: 4 pages, 6 figures, 12th Vienna Conference on Instrumentation 4 pages, 6 figures, 12th Vienna Conference on Instrumentation
In:	Nucl. Instrum. Methods Phys. Res., A 628 (2011) 242-245
In:	12th Vienna Conference on Instrumentation, Vienna, Austria, 15 - 20 Feb 2010, pp.242-245
DOI	10.1016/j.nima.2010.06.327
Subject category	Detectors and Experimental Techniques
Accelerator/Facility, Experiment	CERN LHC ; CMS
Abstract	With an expected ten-fold increase in luminosity in S-LHC, the radiation environment in the tracker volumes will be considerably harsher for silicon-based detectors than the already harsh LHC environment. Since 2006, a group of CMS institutes, using a modified CMS DAQ system, has been exploring the use of Magnetic Czochralski silicon as a detector element for the strip tracker layers in S-LHC experiments. Both p+/n-/n+ and n+/p-/p+ sensors have been characterized, irradiated with proton and neutron sources, assembled into modules, and tested in a CERN beamline. There have been three beam studies to date and results from these suggest that both p+/n-/n+ and n+/p-/p+ Magnetic Czochralski silicon are sufficiently radiation hard for the $R>25$ cm regions of S-LHC tracker volumes. The group has also explored the use of forward biasing for heavily irradiated detectors, and although this mode requires sensor temperatures less than -50\,$^\circ$C, the charge collection efficiency appears to be promising.

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