Prof.
Alexander Bolozdynya
(NRNU MEPhI)
10/10/2016, 15:45
This is a review of a technology of two-phase emission detectors using liquid noble gases as working media. This kind of detectors invented at MEPhI almost 50 years ago is extremely sensitive to ionization (down to single electrons) and can be very massive (in ton scale) in order to provide high count rate for quite rare events and organize an active shielding from natural radioactivity in a...
Mr.
Alexander Kumpan
(National Research Nuclear University MEPhI)
10/10/2016, 16:00
The COHERENT experiment goals are to detect and study elastic neutrino-nucleus scattering (CE$\nu$NS). This process is predicted by Standard Model but it has never been observed experimentally because of very low energy of recoil nucleus. COHERENT is using different detector technologies: germanium detector, CsI[Na] and NaI scintillator crystals and single phase liquid Ar detector. All the...
Alexey Konovalov
(NRNU MEPhI / MIPT)
10/10/2016, 16:13
The COHERENT collaboration aims to observe coherent elastic neutrino nuclear scattering (CEvNS) using Ge, Ar, NaI and CsI detectors. The latter has completed the first year of operation at the Spallation Neutron Source located at the Oak Ridge National Laboratory. A description of the CsI detector setup will be presented as well as the current detector performance, related backgrounds and data...
Mr.
Dmitry Rudik
(ITEP and MEPhI)
10/10/2016, 16:26
The experimental observation of coherent elastic neutrino-nucleus scattering is one of the most important physical tasks nowadays. The RED collaboration has built a LXe detector “RED-100” for this purpose. An LAr-detector “CENNS-10” is now under construction by COHERENT collaboration. The “RED-100” can be used with LAr filling after several modifications. The use of different working media...
Mr.
Anton Lukyashin
(ITEP, MEPhI)
10/10/2016, 16:39
The analysis of experimental data of the two-phase xenon emission detector has been conducted. There were determined ranges of parameters for neutrons and gamma events, using a two-dimensional diagram in isolines. The original method for estimating the deexcitation time of liquid xenon as a working environment of the detector was applied.
Alexander Khromov
(NRNU MEPhI)
10/10/2016, 16:52
A very efficient purification technology of liquid xenon using a high-voltage discharge between titanium electrodes is described. Lifetime of quasi-free electrons in liquid xenon has been increased from less than 0.1 μs up to more than 50 μs at electric field strength from ~50 to ~500 V/cm. It was shown that this technology allows to remove even complicated molecular impurities from...
Mr.
Yury Melikyan
(NRNU MEPhI)
10/10/2016, 17:05
The RED-100 two-phase xenon emission detector utilizes Hamamatsu R11410-20 PMTs to detect VUV luminescent photons. It was observed, that the background PMT illumination with the luminescent light from cosmogenic muons leads to signal generation at the PMT anode even when the photocathodes are blocked with the help of a dedicated controllable PMT base. We attribute this fact to the...
Ms.
Ekaterina Kozlova
(NRNU MEPhI)
10/10/2016, 17:18
A computer model of operation of Hamamatsu R11410-20 photomultiplier based on SPICE software package has been developed. The PMT amplification process is simulated with the use of voltage and current controlled sources of current. Boundaries of linear zone were obtained for high anode current (with respect to the base current) operation regime. The results of simulation are in a reasonable...
Prof.
Matthew Szydagis
(The University at Albany, State University of New York (SUNY))
10/10/2016, 17:31
The past successes and future plans for the NEST semi-empirical simulation model will be discussed. This work was instrumental in forging the field-dependent signal and background models for use in the LUX results, while also serving as a robust foundation for determining the expected performance of LZ in its technical design report. Lastly, progress on Generation-3 R&D on using superheated...
