The STAR PXL detector. (22nd December 2016)

• Record Type: Journal Article
• Authors: Contin, G.
• Is Part Of: Journal of instrumentation. Volume 11:Number 12(2016:Dec.)
• Page Start: C12068
• Page End: C12068
• Publication Date: 2016-12-22
• Subjects: Large detector systems for particle and astroparticle physics -- Particle tracking detectors (Solid-state detectors) -- Solid state detectors -- Radiation damage to detector materials (solid state); Scientific apparatus and instruments -- Periodicals; 502.84
• DOI: 10.1088/1748-0221/11/12/C12068
• Languages: English
• ISSNs: 1748-0221

Abstract

Abstract: The PiXeL detector (PXL) of the STAR experiment at RHIC is the first application of the state-of-the-art thin Monolithic Active Pixel Sensors (MAPS) technology in a collider environment. Designed to extend the STAR measurement capabilities in the heavy flavor domain, it took data in Au+Au collisions, p+p and p+Au collisions at 0√ s NN =20 GeV at RHIC, during the period 2014–2016. The PXL detector is based on 50 μ m-thin MAPS sensors with a pitch of 20.7 μ m. Each sensor includes an array of nearly 1 million pixels, read out in rolling shutter mode in 185.6 μ s. The 170 mW/cm 2 power dissipation allows for air cooling and contributes to reduce the global material budget to 0.4% radiation length on the innermost layer. Experience and lessons learned from construction and operations will be presented in this paper. Detector performance and results from 2014 Au+Au data analysis, demonstrating the STAR capabilities of charm reconstruction, will be shown.