Speaker
Mr
Alexandr Selyunin
(JINR)
Description
A modular liquid-argon (LAr) TPC with pixelated charge readout is considered as a part of the near detector for the DUNE experiment. Such the TPC is developing by ArgonCube collaboration. To provide a trigger for the neutrino event the LAr scintillation light detection is proposed. The light is a vacuum ultraviolet with 128 nm wavelength, thus, it is a challenge to register it. The main requirements imposed on the light detection system are: a good performance at cryogenic temperatures, nonconductive materials, compact dimensions, detection efficiency at a level of percent. A light collection module (LCM) as a candidate for the system is developed at JINR (Dubna, Russia). The LCM is based on the WLS-fibers that are coated with TPB and readout by silicon photomultipliers(SiPM). Also, a full readout chain for the light detection system is being developed at JINR that contains the front-end electronics, SiPMs power supply, DAQ.
A cryogenic test setup has been built at JINR to study the performance of the LCM in the LAr. A similar study was carried out in the cryogenic laboratory of Bern University with highly purified LAr. These studies have shown that the detection efficiency of the LCM for the LAr scintillation light is about 1%. Further tests in the ArgonCube TPC prototype will provide us the real performance of LCM-system with a full readout chain.
Primary author
Mr
Alexandr Selyunin
(JINR)
Co-authors
Dr
Igor Kreslo
(Bern University)
Mr
Roman Berner
(Bern University)
