Kinetic processes in the HgBr(<i>B</i>→<i>X</i>)/HgBr2 dissociation laser

Nighan, W. L.; Brown, Robert T.

doi:10.1063/1.331616

Cited by 31 publications

(19 citation statements)

References 21 publications

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“…HgX +X -* HgX(B2,2)+X2 , (4) HgX(X2,i2)+e-HgX(B2,i2)+e. (5) The recombination process of mercury dihalides positive ions with electrons (3), as it is considered in, ' can play an essential role at current densities oflOOO A/cm2, that has not been observed under the conditions ofour experiment.…”

Section: Resultsmentioning

confidence: 99%

Processes of the formation of HgBr and HgCl excimer molecules in gas-discharge radiation sources

et al. 2002

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The additional processes of excitation of B 2E 2 state of HgBr and HgCI excimer molecules in gas-discharge plasma on HgBr2/HgCI2/He and HgBr2/HgCI2/N2/He mixtures have been investigated (together with dissociation of mercury dihalides by electronic shock, which is the basic process). The pumping of working mixtures was implemented by highfrequency (f= 1000 Hz) barrier and surface discharges ofnanosecond duration (1OO ns), taking place simultaneously.The essential increase in the amplitude (up to 3 times), radiation pulse duration (up to 2 times) and their back edge (up to 15 times) has been revealed with the addition of molecular nitrogen in the HgBr2/HgC12/He working mixture, and also the difference in value of amplitudes of the first, second and third pulses have been revealed. Tt has been established, that the change in temporary radiation parameters is caused by the transfer of energy from molecular nitrogen in metastable state A3EU at collisions with molecules of mercury dihalides. One more additional process, increasing the amplitude of the second and third radiation pulses both in the HgBr2/HgCl2/He mixtures, and in the . .. . 2+ . . 2±HgBr2/HgCl2/N2/He mixtures is the excitation of the HgBr(X I 1/2) and HgCl(X I , 2) radicals in the B E 2 -state by the electrons.

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Section: Resultsmentioning

confidence: 99%

Processes of the formation of HgBr and HgCl excimer molecules in gas-discharge radiation sources

et al. 2002

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“…Indeed, the differences in relative cross sections obtained experimentally at threshold and 200 eV is not so great as the differences in the two sets of cross sections chosen for discharge analysis (Nighan and Brown 1982);McGeoch et al 1983).…”

Section: -17mentioning

confidence: 99%

“…The similarities between these two spectra obtained despite widely disparate excitation conditions are obvious. A comparison of the relative cross section of selected energy loss processes shown in these spectra with those chosen by Nighan and Brown (1982) and by McGeoch et al (1983) is provided in Table 5.1.…”

Section: -17mentioning

confidence: 99%

“…These measurements located several intense energy loss features that had not previously been observed and also provided relative cross sections for use in modeling studies. Though these data were subsequently used as guidance to provide unified sets of cross section data for the modeling of mercuric bromide laser discharges (Nighan and Brown 1982;McGeoch et al 1983), the question was raised as to whether it was appropriate to use relative cross sections obtained at high energies in modeling discharges in which the mean electron energy was much lower (Nighan and Brown 1982). Although we believed that this procedure was probably satisfactory, at the time we lacked experimental verification.…”

Section: -17mentioning

confidence: 99%

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Environmental Research Division technical progress report, January 1984-December 1985

Beasley¹

1986

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“…Data on the absolute values of the effective cross sections of these processes and also their dependences on electron energies are taken from [20][21][22][23].…”

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Optical characteristics and parameters of a gas discharge plasma based on a mixture of mercury dibromide vapor and helium

2009

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We present the results of studies of the optical characteristics and parameters of a gas discharge plasma produced by a barrier discharge at atmospheric pressure, based on a mixture of mercury dibromide vapor and helium (the working medium of a small (emitting area 8 cm 2 ) exciplex gas discharge emitter). An average emission power of 70 mW (λ max = 502 nm) was achieved for pump pulse repetition frequency 6 kHz, voltage pulse amplitude 2.3 kV, and current pulse amplitude 8 A of duration ~100 nsec. We established the plasma parameters: the electron energy distribution functions, the transport characteristics, the discharge power losses per unit pressure going toward electron processes, the electron concentration and temperature, and also the rate constants for processes of elastic and inelastic scattering of electrons by the components of the working mixture as a function of the parameter E/N, where E is the electric field strength and N is the total concentration of mercury dibromide molecules and helium atoms.

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Kinetic processes in the HgBr(B→X)/HgBr2 dissociation laser

Cited by 31 publications

References 21 publications

Processes of the formation of HgBr and HgCl excimer molecules in gas-discharge radiation sources

Processes of the formation of HgBr and HgCl excimer molecules in gas-discharge radiation sources

Environmental Research Division technical progress report, January 1984-December 1985

Optical characteristics and parameters of a gas discharge plasma based on a mixture of mercury dibromide vapor and helium

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