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Francescon, A; Rinella, G Aglieri; Altini, V; Battistin, M; Berry, S; Bianchin, C; Bortolin, C; Direito, J Botelho; Cavicchioli, C; Giglio, C Di; Janda, M; Lesenechal, Y; Manzari, V; Martini, S; Mastroserio, A; Morel, M; Santoro, R; Terrevoli, C; Turrisi, R; Vacek, V
Journal of physics. Conference series, 01/2012, Volume: 395, Issue: 1Journal Article
The new generation of silicon detectors for particle physics requires very reduced mass and high resistance to radiations with very limited access to the detector for maintenance. The Silicon Pixel Detector (SPD) is one of the 18 detectors of the ALICE (A Large Io Collider Experiment) experiment at the Large Hadron Collider (LHC) at CERN. It constitute the two innermost layers of the Inner Tracking System (ITS) and it is the closest detector to th interaction point. An evaporative cooling system, based on C4F10 evaporation at 1.9 bar, was chosen to extrac the 1.35 kW power dissipated by the on-detector electronics. The whole system wa extensively tested and commissioned before its installation inside the ALICE experimenta area. Since then we had to deal with a decrease of the flow in some lines of the system tha imposed severe restrictions on the detector operation. Recently, a test bench has been built in order to carry out a series of tests to reproduce the misbehaviour of the system and investigat proper actions to cure the problem. The performance of the systems and the most interesting results of the above mentioned test will be presented.
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