Abstract
The TORCH detector is being developed for low-momentum particle identification, combining time-of-flight and Cherenkov techniques to achieve charged particle pi/K/p separation up to 10 GeV/c over a flight distance of 10m. This requires a timing resolution of 70 ps for single photons. Based on an existing scalable design, production and testing of a TORCH readout system has been undertaken over the past year, and a novel customized Micro Channel Plate (MCP) photomultiplier device with 128-channels has been instrumented. This paper will report on the development of the readout system which is being used to measure time-of-flight in a test-beam, and its performance. We will also discuss the communication and data alignment between the TORCH system and the TimePix3 telescope in order to provide track reconstruction.
Highlights
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Based on an existing scalable design, production and testing of a TORCH readout system has been undertaken over the past year, and a novel customized Micro Channel Plate (MCP)
This paper will report on the development of the readout system which is being used to measure time-of-flight in a test-beam, and its performance
Summary
The TORCH detector will use an array of novel MCP photomultipliers to detect the Cherenkov photons. The detector concept [1, 3] requires the photon detector to have a physical granularity equivalent to 8 × 128 pixels over a 53 × 53 mm active area within a 60 × 60 mm physical dimension, as shown in figure 2. Such an MCP is under development by our industrial partner, Photek, U.K [4]. Commercial 32 × 32-channel Planacon devices [5] from Photonis, U.S.A., are being investigated, where 4 channels are grouped along the coarse direction to form an 8 × 32 layout
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