Studies of Charged Particle Distributions in an Electrostatic Confinement System. Progress Report, 1 November 1971--31 January 1976

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Microwave cavity techniques were used to measure electron density in a spherical, inertial-electrostatic confinement device using six ion guns. The density was roughly proportional to ion current (1 to 17 mA) and decreased somewhat with increasing ion energy (10 to 37 keV). With D$sub 2$ pressure decrease from 10 to 3 mTorr, n/sub e/ decreased faster than linearly and below approximately 3 mTorr decreased linearly with pressure down to the lowest pressure of 0.4 mTorr. At 1 mTorr and 10 mA, measurements (with poor spatial resolution) were consistent with 10$sup 10$ total electrons and a central n/sub e/ of 10$sup … continued below

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14 p.

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Gardner, A. L. January 1, 1976.

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Microwave cavity techniques were used to measure electron density in a spherical, inertial-electrostatic confinement device using six ion guns. The density was roughly proportional to ion current (1 to 17 mA) and decreased somewhat with increasing ion energy (10 to 37 keV). With D$sub 2$ pressure decrease from 10 to 3 mTorr, n/sub e/ decreased faster than linearly and below approximately 3 mTorr decreased linearly with pressure down to the lowest pressure of 0.4 mTorr. At 1 mTorr and 10 mA, measurements (with poor spatial resolution) were consistent with 10$sup 10$ total electrons and a central n/sub e/ of 10$sup 9$ electrons/cm$sup 3$. Neutron flux (at 50 keV) was about one sixth that of Hirsch (J. Appl. Phys. 38, 4522 (1967)). Six- vs. three-gun operation showed a small enhancement of both n/sub e/ and neutron flux that may indicate some particle trapping.

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14 p.

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Dep. NTIS

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  • Other Information: Orig. Receipt Date: 30-JUN-76

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  • January 1, 1976

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  • Jan. 25, 2021, 1:20 p.m.

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Thumbnail image of item number 1 in: 'Studies of Charged Particle Distributions in an Electrostatic Confinement System. Progress Report, 1 November 1971--31 January 1976'.
Thumbnail image of item number 2 in: 'Studies of Charged Particle Distributions in an Electrostatic Confinement System. Progress Report, 1 November 1971--31 January 1976'.
Thumbnail image of item number 3 in: 'Studies of Charged Particle Distributions in an Electrostatic Confinement System. Progress Report, 1 November 1971--31 January 1976'.
Thumbnail image of item number 4 in: 'Studies of Charged Particle Distributions in an Electrostatic Confinement System. Progress Report, 1 November 1971--31 January 1976'.

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Gardner, A. L. Studies of Charged Particle Distributions in an Electrostatic Confinement System. Progress Report, 1 November 1971--31 January 1976, report, January 1, 1976; Provo, Utah. (https://digital.library.unt.edu/ark:/67531/metadc866656/: accessed May 24, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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