Speaker
Description
The BIPXL telescope is a high-precision tracking system developed at CERN for the characterization of bent silicon crystals in secondary particle beams. The system measures channeling efficiency, track deflection and crystal alignment. It consists of two 10 m tracking arms equipped with up to six hybrid pixel detector (HPD) planes, scintillator-photomultiplier tube (PMT) trigger stations, adjustable detector stages, and a high-precision multi-axis goniometer for crystal alignment. Its configurable geometry accommodates different test scenarios depending on tracking performance requirements. The current prototype setup consists of Timepix3 HPDs and achieves a spatial and angular resolution down to 20 um and 20 urad, respectively. Still, further improvements in effective detection area and material budget are required to meet tracking requirements. The HPDs are integrated using a radiation hard readout architecture developed within the CERN Beam Instrumentation group. Dedicated solutions for motion control, system coordination and online reconstruction enabled development and deployment of the full system in less than a year and stable multi-day test-beam campaigns since. First measurements demonstrate reliable operation and confirm the expected performance. The presented prototype system represents a first step towards a low-material-budget high angular resolution telescope, with future developments based on hybrid pixel detectors using the newest-generation Timepix ASIC.
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