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Spectral Emission Analysis of a dc Helium Hollow Cathode Discharge

Chin, O.H. and Wong, C.S. (2003) Spectral Emission Analysis of a dc Helium Hollow Cathode Discharge. Jurnal Fizik Malaysia, 24 (3 & 4). pp. 107-114. ISSN 0128-0333

Full text not available from this repository.

Official URL: http://eprints.ictp.it/196/

Affiliations

University of Malaya. Dept. of Physics. Plasma Research Laboratory.

Abstract

A fully developed hollow cathode discharge in which the negative glows from opposite walls coalesce to form full column is observed from the measured radial profile of the spectral line emission intensity from within the cathode space. The occurrence of this fully developed hollow cathode discharge is found to depend on the pressure of the working gas $p$, the discharge current $I_A$ and the hollow cathode configuration. The results obtained agrees with those deduced from the optimum pressure range defined in the $V_A$ versus $p$ ($I_A$ fixed) curves. HeI triplet and singlet lines are detected under most of the discharge conditions and hollow cathode configuration investigated but the singly charged ionic line HeII 468.57 nm is detected only at conditions under which the fully developed hollow cathode discharge is defined. The radial distribution of the ionic HeII line emission is indicative of the radial distribution of the high energy (~10² eV, close to the cathode fall potential) electron densities and is observed to peak at the axis. The total intensities of the HeI emission lines are found to be proportional to $I_A^{(0.8-1.2)}$ while that of the ionic HeII emission line is proportional to $I_A^{3.3}$. The width of the cathode dark space is deduced from the radial distribution profiles of the emission lines. From these, the average reduced electric field in the cathode dark space is also estimated.

Item Type:Journal
Additional Information:The authors are grateful to the Ministry of Science, Technology and the Environment of Malaysia for supporting this work under the IRPA Program 4-07-04-40-05.
Keywords:spectral emmission, helium hollow cathode discharge, physics, plasma research
Subjects:Q Science, Computer Science
ID Code:986

[1] F. Paschen, Ann. Phys., 50, 901 (1916).

[2] P.F. Little and A. von Engel, Proc. Roy. Soc., A224, 209 (1954).

[3] A. Güntherschulze, Z. Physik, 19, 313 (1923). [4] A. von Lompe, R. Seeliger and E. Wolter, Ann. Physic, 36(5), 9 (1939).

[5] M.J. Druyvesteyn and F.M. Penning, Rev. Mod. Phys., 12, 87 (1940).

[6] E. Badareu and I. Popescu, J. Electron. Control, 1st series, 4, 503 (1958).

[7] K.G. Hernqvist, RCA Review, 19, 35 (1958).

[8] A.D. White, J. Appl. Phys., 30(5), 711 (1959).

[9] C.S. Willet, Introduction to Gas Lasers: Population Inversion Mechanisms, Pergamon Press, New York (1974), p. 79.

[10] J.W. Gewartowski and H.A. Watson, Principles of Electron Tubes, Van Nostrand, Princeton, New Jersey (1965), p. 56.

[11] Chin O.H. and Wong C.S., Jurnal Fizik Malaysia, 23(1-4),54-59 (2002).

[12] L.J. Kieffer, Atomic Data, 1, 121 (1969).

[13] I. Kuen, F. Howorka and H. Störi, Phys. Rev. A, 23(2), 829 (1981).

[14] S. Hashiguchi and M. Hasikuni, Jpn. J. Appl. Phys., 27(6), 1010 (1988).

[15] T. Musha, J. Phys. Soc. Jpn., 17, 1440 and 1447 (1962).

[16] V.I. Kirichenko, V.M. Tkachenko and V.B. Tyutyunnik, Sov. Phys. - Techn. Phys., 21(9),1080 (1976)

[17] K. Takiyama, T. Usui, Y. Kamiura, T. Fujita, T. Oda and K. Kawasaki, Jpn. J. Appl. Phys., 25(6), L455 (1986)

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