A5051746547- Nuclear Physics and Applications
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Astro and Planetary Science
- Particle physics theoretical and experimental studies
- Radioactivity and Radon Measurements
- Graphite, nuclear technology, radiation studies
- Gamma-ray bursts and supernovae
- Radioactive Decay and Measurement Techniques
- Quantum, superfluid, helium dynamics
- Neutrino Physics Research
- Nuclear reactor physics and engineering
- Solar and Space Plasma Dynamics
- Advanced X-ray and CT Imaging
- Spacecraft and Cryogenic Technologies
- Planetary Science and Exploration
- Nuclear Issues and Defense
- Methane Hydrates and Related Phenomena
- Astrophysics and Cosmic Phenomena
- Medical Imaging Techniques and Applications
- Atmospheric Ozone and Climate
- Nuclear and radioactivity studies
- Advanced Semiconductor Detectors and Materials
Moscow Engineering Physics Institute
2014-2023
Institute of Engineering Physics
1992-2007
Performance of a new modification xenon gamma-ray detector (XGD) is presented. This differs from the previous ones by virtue improved energy resolution (1.7±0.1)% at 662 keV and ability to function in presence external acoustic noise (up 100 dB) with virtually no degradation spectrometric characteristics. These results have been achieved developing digital method processing every electric signal coming XGD. For this method, electronics based on field-programmable gate array has also developed.
A description of the xenon detector (XD) for gamma-ray line emission registration is presented. The provides high energy resolution and able to operate under extreme environmental conditions (wide temperature range unfavorable acoustic action). Resistance noise as well improvement in has been achieved by means real-time digital pulse processing. Another important XD feature ionization chamber’s thin wall with composite housing, which significantly decreases mass device expands its range,...
We constructed a parallel plate drift chamber for measuring the ratio of transverse diffusion coefficient D t to mobility µ electrons multiplied by elementary charge e , /µ, which is called characteristic energy, in high-pressure xenon gas. The energies Xe were obtained at high pressure 1.0 MPa and reduced electric field, E / N from 0.77 7.7 ×10 -18 V·cm 2 where denotes an field number density atoms. At same our results agreed well with data pressures 107 193 kPa previously Koizumi et al....
For about 20 years high-pressure xenon (HPXe) detectors have been developed for the measurement of gamma-radiation spectra in energy range 0.1-5 MeV with high-energy resolution. These numerous advantages comparison germanium and scintillation detectors, but they are relatively sensitive to influence acoustic mechanical vibrations. Decreasing microphonic sensitivity is necessary improving characteristics these detectors. In this paper results vibration testing performed on parallel-plate...
In this paper described applicability of xenon gamma detector for identification and characterization radioactive waste was researched. Standard calibration ray sources were used to determine real physical technical characteristics spectrometer. Samples measured by characterization.
A description of the xenon detector (XD) for ecological applications is presented. The provides high energy resolution and able to operate under extreme environmental conditions (wide temperature range unfavorable acoustic action). Resistance noise as well improvement in has been achieved by means real-time digital pulse processing. Another important XD feature ionization chamber’s thin wall with composite housing, which significantly decreases mass device expands its range, especially at...
Photomultiplier tubes (PMTs) are widely used in physical experiments as well applied devices. PMTs sensitive to magnetic field, so creation of effective shields for their protection is very important. In this paper, the results measurements shielding effectiveness multilayer film on PMT-85 presented. Shields were formed by alternating layers a material with high permeability (Ni-Fe) and electric conductivity-Cu. The maximum number bilayers reached 45. It shown that weak fields up 0.5 mT,...
We have studied the magnetic properties of multilayer film cylindrical configuration shields (MFS) based on NiFe / Cu. The samples were prepared by electrode position. MFS constituted alternating layers and Cu, deposited an aluminum cylinder with diameter 4 cm, length 13 cm 0.5 thickness. thickness each ferromagnetic layer varied from 10 to 150 μm, Cu was 5 μm. Five-samples in which number 3 45 copper – 2 44 tested. best shielding efficiency achieved at maximum comprised about 102. Permalloy...
In the experiment SIGNAL, which is planned to take place on board spacecraft INTERHELIOPROBE, a xenon gammaray spectrometer be used. The gamma-ray in question has been chosen because of its characteristics permitting detailed study solar gamma-radiation under rough experimental conditions. equipment able provide: high energy resolution (5-6-fold better than that scintillation detectors), performance at temperatures, steady operation significant vibroacoustic load, and radiation resistance...
In different materials for magnetic shields, the maximum permeability is achieved values of field. This determines choice material. So protection from fields strength 10 - 150 A/m it advisable to apply amorphous ribbon 84KXCP. For stronger (more than 400 A/m) recommended use MFS based on Ni20Fe80. Use these allows creating an effective shield working in a wide range field strengths.
Xenon detector based gamma-ray spectrometer for a radioactive waste sorting complex and its characteristics are described. It has been shown that the "thin-wall" modification of allows better registration low-energy gamma rays (tens keV). The is capable operation in unfavorable field conditions can identify radionuclides interest less than 1 second.
The results of research proton and neutron space radiation fluxes influence on spectrometric characteristics high pressure xenon gamma-spectrometer (HPXGS) which has been working board the orbital station 'MIR' since 1990 are submitted. It is shown that energy resolution test gamma- line position in registered spectra have not practically changed for six years gamma-spectrometer's work. Other type HPXGS (the cylindrical ionization chamber) was subjected to neutrons irradiation Pu-Be source...
Scintillation light, ionization yield and scintillation decay times have been measured in xenon its mixture with a 0.05% concentration of methane as function the reduced electric field (E/N)-the ratio strength to number density gas-at pressure 21 atm. The measurements xenon-methane made for first time (E/N). An chamber has constructed simultaneously measure electrons photons from <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">239</sup> Pu...
In this article the high voltage power supply for xenon spectrometer is described. Result of time simulation output at different temperatures was shown. The experimental data confirming results simulations. showed breadboard model provides a stability better than 1% generated
A method for earthquake precursors search based on variations of 222Rn concentration determined via intensity measurement daughter nuclei gamma ray emission lines by means xenon gamma-ray spectrometer is discussed. The equipment description as well the first experimental data are presented.