Temporal shape of the photocurrent and the discharge current in a pulsed hollow cathode discharge

1993 ◽  
Vol 65 (10) ◽  
pp. 1406-1410 ◽  
Author(s):  
Paul D. Mixon ◽  
Steven T. Griffin ◽  
Charles W. Bray ◽  
J. C. Williams
Keyword(s):  
Hollow Cathode ◽  
Discharge Current ◽  
Hollow Cathode Discharge ◽  
Temporal Shape

scholarly journals Emission characteristics of laser ablation-hollow cathode glow discharge spectral source

2014 ◽  
Vol 13 (1) ◽  
Author(s):  
Stefan Karatodorov ◽  
Valentin Mihailov ◽  
Margarita Grozeva
Keyword(s):  
Laser Ablation ◽  
Glow Discharge ◽  
Hollow Cathode ◽  
Discharge Current ◽  
Spatial Separation ◽  
Gas Pressure ◽  
Hollow Cathode Discharge ◽  
Sample Introduction ◽  
Emission Characteristics ◽  
Sample Material

AbstractThe emission characteristics of a scheme combining laser ablation as sample introduction source and hollow cathode discharge as excitation source are presented. The spatial separation of the sample material introduction by laser ablation and hollow cathode excitation is achieved by optimizing the gas pressure and the sample-cathode gap length. At these conditions the discharge current is maximized to enhance the analytical lines intensity.

Measurements of Rotational Temperatures in the Hollow Cathode Discharge

1981 ◽  
Vol 35 (1) ◽  
pp. 57-59 ◽  
Author(s):  
J. S. Dobrosavljević ◽  
D. S. Pešić
Keyword(s):  
Comparative Study ◽  
Hollow Cathode ◽  
Discharge Current ◽  
Pressure Range ◽  
Gas Pressure ◽  
Hollow Cathode Discharge

Rotational temperatures in the uncooled hollow cathode discharge (HCD) have been measured. Using rotational lines of the OH (0,0) band, the temperatures were measured in a helium fill gas pressure range from 266 to 2130 Pa and in the discharge current between 0.1 and 0.3 A. A comparative study of these temperatures with gas and excitation temperatures in HCD is presented.

Increased analytical precision in the hollow cathode discharge emission source by improved discharge current control

1991 ◽  
Vol 63 (18) ◽  
pp. 1933-1942 ◽  
Author(s):  
Jih Lie. Tseng ◽  
J. C. Williams ◽  
Robert B. Bartlow ◽  
Steven T. Griffin ◽  
James C. Williams
Keyword(s):  
Hollow Cathode ◽  
Discharge Current ◽  
Current Control ◽  
Hollow Cathode Discharge ◽  
Emission Source ◽  
Analytical Precision

Massenspektrometrische Untersuchungen über die neutralen Teilchen im negativen Glimmlicht einer zylindrischen Hohlkathoden-Entladung in N2 / Mass spectrometric study of the neutral particles in the negative glow of a cylindrical hollow cathode discharge in N2

1973 ◽  
Vol 28 (9) ◽  
pp. 1397-1404
Author(s):  
Tilmann D. Märk
Keyword(s):  
Hollow Cathode ◽  
Discharge Current ◽  
Mass Spectrometric Study ◽  
Reaction Rate Constant ◽  
Hollow Cathode Discharge ◽  
Negative Glow ◽  
Fast Electrons ◽  
A Value ◽  
Dissociation Degree ◽  
Cylindrical Hollow Cathode

Detailed studies have been made of the number densities of the neutral constituents of the negative glow of a hollow cathode discharge (with currents up to 120 mA) produced in N2 at various pressures (0.2 <C p0 < 2.0 Torr).The dissociation degree XN of N2 in the presence of the discharge was determined as a function of gas pressure p0 and discharge current Id and from these data an empirical expression was derived XN p0 = C Id , with C = 7.6·1014 particles cm-3·A-1. Using this result a value of the density [es] of the fast electrons present in the negative glow as a function of discharge current was calculated to [es] = 5.9·107 Id. Also an estimated reaction rate constant was obtained for the fast bimolecular process N + NO→N2+0 (3.3·10-11 cm3s-1).Relative ionization efficiency curves at mass 28 and mass 14 in the presence and absence of the discharge yielded values of the ionization and appearance potential for N2+e→N2++2e (15.55 ± 0.1 eV), N2+e→N++N+2e (23.65±0.2 eV) and N+e→N++2e (14.35 ± 0.4 eV).

Space Charge Distribution in the Cathode Fall Region of an Ar Hollow Cathode Discharge

1988 ◽  
Vol 42 (1) ◽  
pp. 49-51 ◽  
Author(s):  
Takashi Masaki ◽  
Akihide Wada ◽  
Yukio Adachi ◽  
Chiaki Hirose
Keyword(s):  
Space Charge ◽  
Hollow Cathode ◽  
Discharge Current ◽  
Cathode Surface ◽  
Space Charge Density ◽  
Hollow Cathode Discharge ◽  
Radial Position ◽  
Cathode Fall ◽  
Stark Spectroscopy ◽  
Space Charge Distribution

The electric field above the cathode surface of an Ar hollow cathode discharge has been measured by optogalvanic Stark spectroscopy. The field depends on the radial position of illumination and describes the radial distribution of the space charge density, ρ(r), as ρ(r) = –Ar + B, where r is the radial position and the parameters A and B are positive. The values of A and B increase with the discharge current, but the width of the cathode fall region remains nearly constant at about 1.02 ± 0.03 mm for a brass cathode of 5 mm i. d.

Comparison of plasma characteristics of high-power pulsed sputtering glow discharge and hollow-cathode discharge

2020 ◽  
Vol 60 (1) ◽  
pp. 015501
Author(s):  
Shoki Abe ◽  
Katsuyuki Takahashi ◽  
Seiji Mukaigawa ◽  
Koichi Takaki ◽  
Ken Yukimura
Keyword(s):  
Glow Discharge ◽  
High Power ◽  
Hollow Cathode ◽  
Hollow Cathode Discharge ◽  
Plasma Characteristics

Effect of aging the hollow cathode by sputtering on the analytical precision of the hollow cathode discharge emission source

1992 ◽  
Vol 64 (17) ◽  
pp. 1831-1835 ◽  
Author(s):  
Jih Lie. Tseng ◽  
Jau Yurn. Kung ◽  
J. C. Williams ◽  
Steven T. Griffin
Keyword(s):  
Hollow Cathode ◽  
Hollow Cathode Discharge ◽  
Emission Source ◽  
Analytical Precision

Comparison of trace analytical results obtained with different hollow cathode discharge lamps

1985 ◽  
Vol 85 (1-2) ◽  
pp. 15-22
Author(s):  
Zs. Vámos-Szilvássy ◽  
A. Buzási-Győrfi
Keyword(s):  
Hollow Cathode ◽  
Hollow Cathode Discharge ◽  
Analytical Results
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