TIPP 2011 - 2nd International Conference on Technology and Instrumentation in Particle Physics

CMD-3 Liquid Xenon Calorimeter’s signals processing for timing measurements.

Not scheduled

1m

Sheraton Hotel (Chicago)

Poster Presentation Front-end Electronics

Speaker

Mr Leonid Epshteyn (Budker Institute of Nuclear Physics (BINP))

Description

One of the goals of the CMD 3 experiment (BINP, Russia) is a study of the hadron production in electron-positron annihilation. An important example of such process is a neutron-antineutron pair production near threshold. A signature of this process is a large energy deposition in the liquid xenon (LXe) calorimeter due to antineutron annihilation which typically occurs by 5 ns or later after beams collision. For identification of such events and for providing a trigger by them it is necessary to determine the time of signal appearance with accuracy of 2-3 ns On-Line. The LXe-calorimeter of the CMD-3 consists of 14 coaxial cylindrical ionization chambers with anode and cathode readout. The duration of the charge collection to the anodes is about 4.5 microseconds. Thus, to obtain the required accuracy of the On-Line measurements of the signal arrival time a special signal processing method has been developed. In this paper the signal processing algorithm and a selection of the optimal parameters of the measuring channel are described.