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V. V. Parusov

Publications and source records attributed to V. V. Parusov.

13 recordsLinked to original sources
arXiv2023

GEM-based detectors for direct detection of low-mass WIMP, solar axions and narrow resonances (quarks)

Gas electron multipliers (GEMs) with wire (WGEMs) or metal electrodes (MGEMs), which don't use any plastic insulators between electrodes are created. The chambers containing MGEMs (WGEMs) with pin-anodes are proposed as detectors for searching of spin-dependent interactions between Dark Matter (DM) particles and gases with nonzero-spin nuclei (1H, D2, 3He, 19F, 21Ne, 129Xe, 131Xe,etc.In this paper, we present a review of such chambers.As photosensitive addition we use of H2, C2H4, CF4, TMAE, etc. For investigation of the gas mixtures Ne+10%H2, H2(D2)+3ppmTMAE, the chamber containing WGEM with pin-anode detection system was constructed. In this paper we present the results of an experimental study of these gaseous mixtures exited by an alpha-source. Mixture of Ar + 40 ppm C2H4 and mixture 50% Xe + 50%CF4 have been investigated. The spatial distributions of photoelectron clouds produced by primary scintillations on alpha and beta-particle tracks, as well as the distributions of photoelectron clouds due to photons from avalanches at the pin-anode, have been measured for the first time. In our experiments as another filling of the chambers for search of low-mas WIMP (<10 GeV/c2), solar neutrino and solar axions with spin-dependent interaction we propose to use the mixtures: D2 +3ppmTMAE, 3He + 3%CH4, 21Ne + 10%H2, at pressure 10-17 bar. And in our experiment with liquid gases is used the mixtures with 19F (LAr + CF4, LXe + CF4) and mixture LCH4 + 40ppm TMAE. The time projection chamber (TPC) with the mixture D2 + 3ppmTMAE filling allow to search of spin-dependent interactions of solar axions and deuterium. As well as we present the detecting systems for search of narrow pp-resonances (quarks) in accelerators experiments. Keywords: MGEM, pin-anodes, WIMP, Axions, TPC, SD-interaction, energy 1-100 eV

physics.ins-det↗
arXiv2022

The method of inhalation therapy with micro-doses of mixtures noble gases with oxygen

In this research, we presented the method of inhalation therapy with noble gas micro-doses and results of clinical studies in hospital of Russian Academy of Sciences (RAS). We have designed a device that allows dosed injection of noble gas with a volume of about 2-4 ml with peroxide vapors into the nasal cavity. After testing on the authors of the project and obtaining a positive impact of xenon and krypton, a study was conducted on a group of conditionally healthy volunteers in the amount of 20 people. We have noted a positive effect from 18 people. And also, in this article we briefly described the methods and devices that are used for inhalation therapy with mixtures of noble gases with oxygen. Keywords: noble gases, oxygen, inhalation therapy, device, respiratory apparatus, aerosols, COVID-19 pneumonia.

physics.med-ph↗
arXiv2021

The arctic electric power stations are the decision of energy, environmental and climate problems

In this paper we propose the decision of energy, environmental and climate problems of the society with the help of arctic electric power stations. Such stations can provide the electricity to the whole of Europe and Asian, this can save from dependence on oil and gas. This method of producing electricity is completely ecologically safe. Keywords: electrical engineering, power station, design, generator, renewable, energy system

physics.soc-ph↗
arXiv2020

Gas electron multipliers with metal electrodes and their applications in detectors

Gas electron multipliers (GEMs) with wire (WGEMs) or metal electrodes (MGEMs), which don't use any plastic insulators between the electrodes are created. The absence of plastic insulation between the electrodes of WGEMs excludes unwanted leakage currents and spark breakdowns between the electrodes. Accidental spark events in such MGEM don't lead to their failure as far as positive ions quickly move away from the breakdown region by a strong electric field in the gap region. In this work, we present a review of such GEMs. The chambers containing MGEMs (WGEMs) with pin-anodes are proposed as detectors for searching of interactions between Dark Matter particles and hydrogen (H2). In this paper, we present a review of such chambers. For investigation of the gas mixtures (Ar+10% H2, Ne+10%H2, H2 +3ppmTMAE), the chamber containing WGEM with pin-anodes detection system was constructed. In this paper we present the results of an experimental study of these gaseous mixtures exited by an alpha source. Finally, we discuss principles of operation of GEMs with pin-anodes as well as plans for constructing of large scale (150 mm x 150 mm) MGEM detectors.

physics.ins-det↗
arXiv2016

Detection chamber for search of low Mass WIMP and solar axions

A chamber for direct detection of WIMPs with masses < 10 GeV/c2 and solar axions is developed. The chamber is filled with a gas mixture of H2 +3ppm TMAE (1,5,10 bar), or D2 + 3ppm TMAE. These gas fillings make it possible to suppress an electron background. For detection of events, the system GEM+pin-anode with a multiplication coefficient of about 10E+05 is constructed.

physics.ins-det↗
arXiv2015

The Methods for Direct Detection of WIMP with Mass <0.5 GeV

The chamber for direct detection of WIMP with mass <0.5 Gev/c2 was developed. The chamber is filled with gas mixture Ne+10%H2 (0-1bar)+0,15ppm Ge(CH3)4. For events detection used GEM+pin-anodes , which provides the energy threshold about eV. The electron background is suppressed owing to photosensitive addition Ge(CH3)4 . It is proposed also for direct detection of WIMP the liquid argon chamber with H2 dissolved in liquid argon at a concentration 100ppm+0,015ppm Ge(CH3)4 .

astro-ph.IM↗
arXiv2012

Massive liquid Ar and Xe detectors for direct Dark Matter searches

A novel experiment for direct searches of the Dark Matter with liquid argon double-phase chamber with a mass of liquid Ar up to several hundred tons is proposed. To suppress the b-, g- and n0- backgrounds, the comparison of scintillation and ionization signals for every event is suggested. The addition in liquid Ar of photosensitive Ge(CH3)4 or C2H4 and suppression of triplet component of scintillation signals ensures the detection of scintillation signals with high efficiency and provides a complete suppression of the electron background. For the detection of photoelectrons and ionization electrons, highly stable and reliable GEM detectors must be used.

physics.ins-det↗
arXiv2010

Gas Electron Multiplier detectors with high reliability and stability

The Gas Electron Multiplier detectors with wire and metallic electrodes, with a gas filling in the gap between them were proposed and tested. The main advantage of these Gas Electron Multipliers compared to standard ones consists in their increased stability and reliability. The experimental results on testing of such detectors with gaps between the electrodes of 1 and 3 mm are reported. It is demonstrated, that the best gas filling for the gas electron multipliers is neon with small admixture of quenching gases (for example, (N2+H2O) at ~100ppm). This filling offers the greatest coefficient of proportional multiplication as compared with other gases, at small electric potential difference between the GEM electrodes, in absence of streamer discharges in the proportional region. The results on operation of the multi-channel gas electron multiplier with wire cathode and continuous anode filled with Ne, Ar, Ar+CH4 and Ar+1%Xe are presented also. Based on the experimental observations, the explanation of the mechanism of formation of streamers is given.

physics.ins-det↗
arXiv2010

Multi-channel gas electron multiplier with metallic electrodes

The design of multi-channel gas electron multiplier (MGEM) with metallic electrodes is proposed, produced and tested. The electrodes of MGEM are produced from the brass plates with thickness of 1 mm, round openings of 1 mm in diameter and 1.5 mm steps between them. The gap between the electrodes is equal to 3 mm, while the total working area has a diameter of 20 mm. The neon gas fillings of the MWGEM chamber with micro admixtures of N_2 and H_2O have been tested. The total maximal coefficient of proportional multiplication of electrons in neon with admixture of (H_2O+N_2)<100 ppm of 30000 is obtained.

physics.ins-det↗
arXiv2010

Multi-channel wire gas electron multipliers with gaps between the electrodes of 1 and 3mm

Multi-channel wire gas electron multipliers (MWGEM) with gaps between the electrodes of 1 and 3mm were investigated. The chamber of the MWGEM was filled with pure commercial neon gas at pressure of 0.4 or 1.0 bar and irradiated by alpha-particles (Pu-239) or beta-particles (Ni-63). The following maximal coefficients of electrons proportional multiplication have been obtained: 6 \times 10^3 (alpha, d=3mm, P=1bar, 20% streamers); 1.2 \times 10^3 (beta-, d=3mm, P=1bar, 50% streamers); 6 \times 10^3 (alpha, d=3mm, P=0.4bar, 20% streamers); 10^5 (beta-, d=3mm, P=0.4bar, 50% streamers). For the case, when the multiplication took place simultaneously in the MWGEM gap and in its anode gap, the following maximal coefficients of proportional multiplication of electrons have been obtained: 1.08 \times 10^5 (beta-, d=1mm, P=0.4bar, 50% streamers); 2 \times 10^6 (beta-, d=3mm, P=0.4bar, 20% streamers); 1.12 \times 10^5 (alpha, d=3mm, P=0.4bar, 50% streamers).

physics.ins-det↗
arXiv2010

A multi-channel wire gas electron multiplier

A novel and relatively simple method of production of electrodes for a multi-channel wire gas multiplier is developed. Two modifications of the multipliers have been tested: with a multiplication of electrons between two wire electrodes, MWGEM, and between a wire electrode and continuous anode, MWCAT. For both MWGEM and MWCAT detectors, filled with neon under pressure of 760 Torr and irradiated by beta-particles (Ni-63), the coefficient of proportional multiplication of electrons up to 10000 was obtained. For the MWGEM detector irradiated by alpha-particles (Pu-239), the coefficient of proportional multiplication of 300 was obtained. It is observed, that in contrast to the GEM detectors, produced by perforation of a metal-clad plastic foil, in a MWGEM the discharges do not destroy its electrodes even for the potentials above the threshold of discharges. The results on operation of the MWCAT filled with Ar, Ar+CH4 and Ar+1% Xe are also presented.

physics.ins-det↗
arXiv2001

Investigation of the proportional discharge mechanism in nonelectronegative gases

A shape of the signals in proportional chamber with preamplification gap and electron component extraction from proportional discharge has been investigated. It was shown for Penning mixtures that in proportional discharge besides the primary avalanches there is also the tail of secondary avalanches caused by metastable and nonmetastable Penning effects. For different mixtures of gases the duration of the signals caused by secondary avalanches are equal to ~ n*10 microseconds (n = 1 - 10), the total charge of secondary avalanches is comparable or larger than in primary avalanches.

physics.ins-det↗