The Calibration System Based On the Controllable UV/visible LED Flasher for the Veto System of the DarkSide Detector

International Conference on Particle Physics and Astrophysics

物理学;天文学

Chepurnov, A.S.^1 ; Gromov, M.B.^1,2 ; Litvinovich, E.A.^3,4 ; Machulin, I.N.^3,4 ; Skorokhvatov, M.D.^3,4 ; Shamarin, A.F.^5

Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics, Moscow

119234, Russia^1

Lomonosov Moscow State University, Faculty of Physics, Moscow

119234, Russia^2

NRC, Kurchatov Institute, Moscow

123182, Russia^3

National Research Nuclear University MEPhI, Moscow Engineering Physics Institute, Kashirskoe highway 31, Moscow

115409, Russia^4

OOO Marathon, Moscow

119234, Russia^5

关键词: Calibration system;    Flash intensity;    Intensity loss;    Liquid scintillator;    Pulse measurements;    Repetition rate;    Spatial reconstruction;    Wide energy range;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/798/1/012118/pdf
DOI  :  10.1088/1742-6596/798/1/012118

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

A prototype of the calibration system for the Liquid Scintillator Veto (LSV) and for the Water Cherenkov Veto (WCV) of the DarkSide detector have been developed. The instrument consists of a fast double output flasher which can be configured and controlled via USB, the appropriate application software. UV, visible or combination of both LEDs could be installed. Flashes amplitude, repetition rate and delay time between two continuous pulses are adjustable. High -OH silica fibers are used to minimize intensity losses on the delivery path. X shape splitter is used to combine two LED's pigtailed output and then to split the sum of the signals. One output feeds calibration path to the detector, while the second is used for pulse-to-pulse measurement of the flash intensity with compatible photodiode in combination with Flash ADC. The instrument allows to simulate point-like physical events in very wide energy range from a few hundred keV up to several dozen of MeV. Additional studies (pile-up analysis, spatial reconstruction, quenching as a function of position and wavelength) can be performed due to double-LEDs scheme and possibility of fast replacement of diodes.