Author: James F. Holt
Publisher:
ISBN:
Category :
Languages : en
Pages : 30
Book Description
A set of coaxial cathode tubes produced a plasma having the same characteristics as the plasma from a tubular hollow cathode. Measurements of the plasma characteristics by microwave interferometry, plasma sweeper, Langmuir probe, and measurements made with a new plasma tool--a plasma scanner--showed that the plasma is nearly completely ionized at 10 to the 13th power/cc ion density. The electron beam, originating in the cathode, was detected by means of the scanner. The electrons in the beam attain energies as high as two-thirds of the arc voltage drop. The ion temperature of 6.9 electron volts, which was deduced from plasma sweeper measurements and diffusion theory, could result from directed ion drift; the electron temperature of the plasma is 3 electron volts. (Author).
Experimental Study of a Hollow-cathode Argon Arc Plasma
Author: James F. Holt
Publisher:
ISBN:
Category :
Languages : en
Pages : 30
Book Description
A set of coaxial cathode tubes produced a plasma having the same characteristics as the plasma from a tubular hollow cathode. Measurements of the plasma characteristics by microwave interferometry, plasma sweeper, Langmuir probe, and measurements made with a new plasma tool--a plasma scanner--showed that the plasma is nearly completely ionized at 10 to the 13th power/cc ion density. The electron beam, originating in the cathode, was detected by means of the scanner. The electrons in the beam attain energies as high as two-thirds of the arc voltage drop. The ion temperature of 6.9 electron volts, which was deduced from plasma sweeper measurements and diffusion theory, could result from directed ion drift; the electron temperature of the plasma is 3 electron volts. (Author).
Publisher:
ISBN:
Category :
Languages : en
Pages : 30
Book Description
A set of coaxial cathode tubes produced a plasma having the same characteristics as the plasma from a tubular hollow cathode. Measurements of the plasma characteristics by microwave interferometry, plasma sweeper, Langmuir probe, and measurements made with a new plasma tool--a plasma scanner--showed that the plasma is nearly completely ionized at 10 to the 13th power/cc ion density. The electron beam, originating in the cathode, was detected by means of the scanner. The electrons in the beam attain energies as high as two-thirds of the arc voltage drop. The ion temperature of 6.9 electron volts, which was deduced from plasma sweeper measurements and diffusion theory, could result from directed ion drift; the electron temperature of the plasma is 3 electron volts. (Author).
An Experimental Study of a Hollow Cathode for Arc Devices
Author: Roland A. Stebbins
Publisher:
ISBN:
Category :
Languages : en
Pages : 126
Book Description
The voltages, currents, and heat loads to a coiled anode and multi-element hollow cathode were determined. The cathode consisted of a flat water-cooled base element and five hollow, water-cooled disks in a vertical column above it. The cathode elements were insulated, and shunt resistors were used to cause the cathode current to split into six paths. The anodes were water-cooled coils of 1/4-in. diameter copper tubing. A convergent divergent shape was used with an air atmosphere, and a two row coil was used with argon. The coil current produced a magnetic field which increased anode life. The anode was mounted above the cathode, and the arc was not enclosed. When operated in air, the cathode sustained currents of 200-300 amperes before failure. Operation in argon was limited by constrictor failure to about 200 amperes. Cathode condition was very good after 40 test runs in argon at total currents ranging from 83 to 218 amperes. Calorimetrically measured heat loads decreased when the current split among the cathode elements and further decreased in an argon atmosphere. (Author).
Publisher:
ISBN:
Category :
Languages : en
Pages : 126
Book Description
The voltages, currents, and heat loads to a coiled anode and multi-element hollow cathode were determined. The cathode consisted of a flat water-cooled base element and five hollow, water-cooled disks in a vertical column above it. The cathode elements were insulated, and shunt resistors were used to cause the cathode current to split into six paths. The anodes were water-cooled coils of 1/4-in. diameter copper tubing. A convergent divergent shape was used with an air atmosphere, and a two row coil was used with argon. The coil current produced a magnetic field which increased anode life. The anode was mounted above the cathode, and the arc was not enclosed. When operated in air, the cathode sustained currents of 200-300 amperes before failure. Operation in argon was limited by constrictor failure to about 200 amperes. Cathode condition was very good after 40 test runs in argon at total currents ranging from 83 to 218 amperes. Calorimetrically measured heat loads decreased when the current split among the cathode elements and further decreased in an argon atmosphere. (Author).
Scientific and Technical Aerospace Reports
Numerical study on low-pressure hollow cathode argon arc plasma
Nuclear Science Abstracts
An Experimental Study of the Cathode Fall in Helium and Argon with Wire Cathodes
Author: Burton Evans Moore
Publisher:
ISBN:
Category : Algae
Languages : en
Pages : 396
Book Description
Publisher:
ISBN:
Category : Algae
Languages : en
Pages : 396
Book Description
Fusion Energy Update
Documentation of Plasma Physics. Pt. 1, Experimental Plasma Physics [and] Theoretical Plasma Physics
Author:
Publisher:
ISBN:
Category : Plasma (Ionized gases)
Languages : en
Pages : 554
Book Description
Publisher:
ISBN:
Category : Plasma (Ionized gases)
Languages : en
Pages : 554
Book Description
Journal of Research of the National Bureau of Standards
Author: United States. National Bureau of Standards
Publisher:
ISBN:
Category : Chemistry
Languages : en
Pages : 576
Book Description
Publisher:
ISBN:
Category : Chemistry
Languages : en
Pages : 576
Book Description
Experimental Study of Argon II Line Profiles in a Pulsed Arc Plasma
Author: Carl Richard Neufeld
Publisher:
ISBN:
Category : Argon
Languages : en
Pages : 194
Book Description
Publisher:
ISBN:
Category : Argon
Languages : en
Pages : 194
Book Description