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The object of investigation is the optical characteristics of Br2, Cl2, XeBr, and XeCl excilamps excited by microwave radiation. The power of the microwave discharge is determined from a pressure
jump in the bulb of the lamp. Conditions for the effective generation of XeCl* and XeBr* exciplexes in cylindrical lamps are
found. The efficiency of generation of these exciplexes equals 7.2 and 7.8%, respectively. 相似文献
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Dem’yanov S. A. Kartanov S. A. Kolesov V. F. Korablev S. A. Lopukhov N. V. Pikulev A. A. Pluzyan K. G. Sizov A. N. 《Physics of Atomic Nuclei》2021,84(8):1459-1478
Physics of Atomic Nuclei - The results of complex calculation of the solution pulsed nuclear reactor (PNR) VIR-2M are presented. The simulation of the fuel solution dynamics is described, and... 相似文献
4.
E. A. Sosnin V. A. Panarin V. S. Skakun A. A. Pikulev V. F. Tarasenko 《Technical Physics》2016,61(8):1209-1213
The energy redistribution in barrier-discharge Xe2 excilamp in various excitation regimes is investigated using the pressure jump method. Analytic expressions are derived for calculating power W dissipated in the excilamp discharge plasma in the form of heat and for calculating total discharge heat power PT spent on heating the excilamp. It is shown that the mechanism of the thermal energy dissipation gradually changes upon an increase in the xenon pressure in the excilamp. The conditions for generating the maximal radiation power of the excilamp are determined. It is shown that the maximum of the average radiation power is attained for an excitation pulse duration of 500 ns and the maximal pulse power is attained for a pulse duration of 100 ns. It is found that the optimal operation regime for the excilamp corresponds to the maximal values of the PT–W difference. 相似文献
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A. A. Pikulev 《Technical Physics》2006,51(6):715-720
Energy transfer from a flat fissile uranium slab to a fine wire via fission fragments is calculated. The rate of energy transfer versus the thicknesses of the slab and protecting aluminum film, as well as the wire-slab gap, is found. An expression for the absorption coefficient of the wire is derived, and the effect the thickness of the wire has on the energy transfer process is studied. The amount of the edge effect for a finite-size fissioner slab is demonstrated with calculations for vacuum conditions and for argon under a pressure of 0.25 atm. 相似文献
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V. M. Tsvetkov A. A. Pikulev E. A. Sosnin S. M. Avdeev V. F. Tarasenko 《Technical Physics》2010,55(6):807-811
Data for the pressure jump are used to study thermodynamic processes in barrier-discharge excilamps under the conditions of
a diffuse (uniform) discharge and microdischarges. It is shown that a linear relationship between the pressure jump and excilamp
radiation intensity can help to control the radiation power. 相似文献
7.
A. A. Pikulev 《Technical Physics》2003,48(6):693-696
Heat exchange between a linear heat source and a gas flow is studied theoretically. The coefficient of source-to-gas heat
transfer is found as a function of the gas velocity in the limit of zero temperature drop. It is shown that the heat-transfer
coefficient depends linearly on the gas flow velocity for Peclet numbers 0.1–1.0. 相似文献
8.
The electrical and luminescent characteristics of a barrier-discharge lamp filled with a Kr/CCl4 (150: 1) mixture are experimentally studied versus the value of pd, which varies in the range (7.6–14) × 103 Pa cm. When simulating the gas discharge using similarity parameters, the following relationships are fulfilled: for pd = const (p is the pressure, d is the interelectrode distance), the pulse duration and the mean current density are τ
j
∼ 1/p and 〈j〉 ∼ p; the surface charge density on the electrodes, σ ∼ const; the duration of the UV radiation pulse and the efficiency of UV
radiation due to a KrCl* (222 nm) exciplex, τrad ∼ 1/p and η ∼ p
2. The maximal radiation efficiency achieved in the experiments is about 13%. Deviations from the similarity laws for the gas
discharge are related to the filamentary form of the observed discharge. Qualitative analysis indicates that similarity laws
may be fulfilled for such a form of discharge as well but locally, within a single filament. 相似文献
9.
E. A. Sosnin S. M. Avdeev V. A. Panarin V. F. Tarasenko A. A. Pikulev V. M. Tsvetkov 《The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics》2011,62(3):405-411
The radiative and thermodynamic parameters of a dielectric barrier discharge XeBr and
KrBr excilamp were studied. The power expended in heating the gas mixture and the excilamp
bulb was determined by measuring the fast and slow components of a pressure jump. The
power consumed by the exilamp was estimated using oscillograms of voltage and current
pulses. The maximum UV power and efficiency of a XeBr excilamp were 3.8 W and 7.5%,
respectively. For the same conditions the maximum UV power and efficiency of a KrBr
excilamp were 1.6 W and 3%, respectively. Analysis of the experimental results shows that
at low mixture pressures most of the discharge power is expended in heating the gas and at
the elevated pressure the most of the discharge power goes into the generation of acoustic
waves and heating of the excilamp bulb walls through electron and ion bombardment. The
concept proposed earlier for the energy balance in DBD lamps as thermodynamic systems was
verified. 相似文献
10.
A. A. Pikulev 《Technical Physics》2005,50(10):1328-1334
A nonstationary gasdynamic model of sealed laser and luminescent cells pumped by uranium fission fragments is developed. This
model extends the earlier 1D model of gas dynamics in cells of flat geometry to the case of cells with buffer volumes and
allows analysis of gasdynamic processes for the energy deposition step distribution over the laser cell length. 相似文献