Speaker
Mr
Ilya Surin
(Budker Institute of Nuclear Physics)
Description
The Spherical Neutral Detector (SND)[1] is intended for the study electron-positron annihilation processes operating at VEPP-2000[2] e+e- collider, which is located at Novosibirsk, Russia. The main part of the SND detector is a three-layer electromagnetic calorimeter (EMC). The EMC consists of 1640 counters. Each counter includes NaI(Tl) crystal, vacuum phototriode[3], and charge-sensitive preamplifier.
Now the SND team has an aim to study e+e- into neutron-antineutron reaction near threshold. One of the necessary condition for this task is to provide the time resolution of about 1 ns or better[4] (now 5 ns) and save current amplitude resolution. To achieve that, new modules for shaping and digitizing signal were designed, manufactured and tested.
New shaping module F12M provides optimal signal shape for best time and amplitude resolution.
New FADC module will provide recording and processing of the signal oscillogram for the time-of-flight and amplitude calculation. Special algorithm of the signal processing was developed and tested.
Achieved time resolution is about 1 ns, the amplitude resolution is 250 keV.
References
[1] M.N Achasov et al. Nuc. instr. Meth. A 449, 125 (2000);
[2] D.E Berkaev et al. Journal of Experimental and Theoretical Physics 140, N2, 247 (2011);
[3] V.V. Anashin et al. Nucl. Instr. and Meth. A 379, 522 (1996)
[4] A.A.Botov et al. Nucl. Phys. B, Proc. Suppl.162, 41 (2006)
Primary author
Mr
Ilya Surin
(Budker Institute of Nuclear Physics)
