New design of silicon stripixel sensor has been developed at BNL for PHENIX upgrade. The sensor is a single-sided, DC-coupled, two-dimensional position sensitive device with good position resolution. This design is simpler for sensor fabrication and signal processing than the conventional double-sided strip sensor. HPK has produced pre-production stripixel sensors with thickness of 625 μm. The quality assurance tests show that the very low leakage current 0.12 nA per strip allows the use of the SVX4 chip. A long term stability test shows that the leakage current is stable over a long period of time. The study of the effects of irradiation on the performance of the stripixel sensor has been made using p+p collisions at 200 GeV at PHENIX, 14 MeV neutron and 20 MeV proton beams.
Available at: http://works.bepress.com/craig-ogilvie/275/
This is a manuscript of an article published as Nouicer, Rachid, and Phenix Collaboration. "PHENIX upgrade: Novel stripixel detector for heavy quark detection and proton spin structure measurements at RHIC energies." Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 261, no. 1 (2007): 1067-1071. DOI:10.1016/j.nimb.2007.04.265. Posted with permission.