Timing performance of a Micro-Channel-Plate Photomultiplier Tube
J. Bortfeldt, F. Brunbauer, C. David, D. Desforge, G. Fanourakis, M. Gallinaro, F. García, I. Giomataris, T. Gustavsson, C. Guyot, F.J. Iguaz, M. Kebbiri, K. Kordas, P. Legou, Jie Liu, M. Lupberger, I. Manthos, H. Müller, Vasileios Niaouris, E. Oliveri, T. Papaevangelou, K. Paraschou, M. Pomorski, F. Resnati, L. Ropelewski, D. Sampsonidis, Thomas Schneider, Ph. Schwemling, Emmanuel Scorsone, L. Sohl, M. van Stenis, P. Thuiner, Y. Tsipolitis, S.E. Tzamarias, R. Veenhof, Xiong Wang, S. N. White, Z. Zhang, Yi Zhou
Abstract
The spatial dependence of the timing performance of the R3809U-50 Micro-Channel-Plate PMT (MCP-PMT) by Hamamatsu was studied in high energy muon beams. Particle position information is provided by a GEM tracker telescope, while timing is measured relative to a second MCP-PMT, identical in construction. In the inner part of the circular active area (radius r<5.5 mm) the time resolution of the two MCP-PMTs combined is better than 10 ps. The signal amplitude decreases in the outer region due to less light reaching the photocathode, resulting in a worse time resolution. The observed radial dependence is in quantitative agreement with a dedicated simulation. With this characterization, the suitability of MCP-PMTs as t0 reference detectors has been validated.