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CLAS12
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- E-mail: rogozhin@silab.sinp.msu.ru This paper describes the upgrade of the CLAS12 detector complex at Thomas Jefferson National Accelerator Facility. Scientific goals of the CLAS12 experiment are outlined and the according requirements for the experimental setup are formulated. The detector complex is described and the role of the Silicon Vertex Tracker is mentioned. The layout of the Silicon Vertex Tracker, the operation and topology of silicon sensors and the results of sensor testing are presented. A description of the FSSR2 ASIC, which is the main candidate for the data acquisition system chip, is given.

CLAS12[1,2] (CEBAF Acceptance Spectrometer at 12 GeV) . . (Thomas Jefferson National Accelerator Facility, TJNAF). CEBAF (Continuous Electron Beam Accelerator Facility ­ ), , 6 . CEBAF Large Acceptance Spectrometer ­ CEBAF , B , , . CLAS , SVT ­ Silicon Vertex Tracker ( ).

. 1. CLAS12[4].


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. 2. CLAS12[4].


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, , , . , «» . . , . . , , . . FSSR2. FSSR2 [8] 2004 BTeV. 128 , , . , ( ), - . FSSR2 , CEBAF. , , , . , FSSR2 ( ). FSSR2 .
1. 2. 3. 4. 5. 6. 7. 8. Pre-Conceptual Design Report for the Science and Experimental Equipment for the 12 GeV Upgrade of CEBAF. Jefferson Lab ­ June 11, 2004. Conceptual Design Report for The Science and Experimental Equipment for The 12 GeV Upgrade of CEBAF. Jefferson Lab ­ March 25, 2005. V. Mokeev et al., Nucleon Resonance Studies with CLAS12 in the Transition from Soft to Partonic Physics. The Hall B 12 GeV Upgrade. Preconceptual Design Report. Jefferson Lab ­ December, 2005. . : . ./ . ... .: , 1984. ..//. 1992. . 23. . 3. . 785. Specifications for the Hall B Silicon Vertex Tracker's Prototype Module. Jefferson Lab June 26, 2006. V. Re et al., FSSR2, a Self-Triggered Low Noise Readout Chip for Silicon Strip Detectors, IEEE Trans. Nucl. Sci., vol. 53, no. 4, pp. 2470-2476, Aug. 2006.