Results of in-beam tests of an MCP-based vacuum sector prototype of the T0/centrality detector for ALICE

• Published in: Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Vol. 478; no. 1; pp. 220 - 224
• Main Authors: Bondila, M., Efimov, L., Hatzifotiadou, D., Feofilov, G., Kondratiev, V., Lyapin, V., Nysten, J., Otiougova, P., Tulina, T.A., Trzaska, W.H., Tsimbal, F., Vinogradov, L., Williams, C.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.02.2002
• ISSN: 0168-9002; 1872-9576
• DOI: 10.1016/S0168-9002(01)01761-2

We report on results of efficiency tests for MIPs and timing resolution studies obtained with different layouts of micro-channel plate (MCP) detector prototypes at CERN PS test beams. The detector is composed of an MCP stack and multipad readout anodes integrated with a passive isochronal summator. Several types of setups were tested, including MCPs with different gain. Also, a very first test of the Micro Sphere Plates detector was performed. The performance of fast electronics including Double Threshold Discriminators and a fast multiplicity discriminator for short 2 ns signals was studied. Currently, the best experimental results for MCP detectors show 75 ps timing resolution obtained at 75% efficiency for the registration of a single muon. We expect further enhancements, mostly through improvements in the fast electronics.