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Title: Electron equilibrium and confinement in a modified Penning trap and its application to Penning fusion

Abstract

The Penning fusion concept is described. Recent theoretical work on eliminating limitations on thermonuclear gain (Q) associated with ion-ion collisions is reviewed. A critical issue identified is the demonstration of the desired spherical electron configuration. Constraints on the electron distribution function are derived. A small combined trap (majority electrons), PFX-I (Penning Fusion eXperiment-Ions) has been constructed to study these issues. PFX-I is described. Two diagnostics described for electrons are destructive dumping of trapped electrons and noninvasive optical detection of impact induced fluorescence. Initial results of PFX-I operation at applied voltages V{sub 0} up to 2 kV and magnetic fields B up to 1.14 T are described. Electron equilibrium is found to be consistent with trap filling to the space charge limit, with inventory proportional to V{sub 0} and independent of B. Electron confinement times range from 1 to 10 ms and are determined by neutral pressure. These results are interpreted and future directions sketched. (c) 2000 American Institute of Physics.

Authors:
 [1];  [1];  [1];  [2];  [2]
  1. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
  2. Fusion Studies Laboratory, University of Illinois, Urbana, Illinois 61801 (United States)
Publication Date:
OSTI Identifier:
20216041
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 7; Journal Issue: 5; Other Information: PBD: May 2000; Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; PENNING EFFECT; PENNING ION SOURCES; TRAPS; PLASMA CONFINEMENT; GAIN; FUSION YIELD; THERMONUCLEAR REACTORS; ION-ION COLLISIONS; SPACE CHARGE; PLASMA DIAGNOSTICS; EXPERIMENTAL DATA; THEORETICAL DATA

Citation Formats

Barnes, D. C., Schauer, M. M., Umstadter, K. R., Chacon, L., and Miley, G. Electron equilibrium and confinement in a modified Penning trap and its application to Penning fusion. United States: N. p., 2000. Web. doi:10.1063/1.873987.
Barnes, D. C., Schauer, M. M., Umstadter, K. R., Chacon, L., & Miley, G. Electron equilibrium and confinement in a modified Penning trap and its application to Penning fusion. United States. doi:10.1063/1.873987.
Barnes, D. C., Schauer, M. M., Umstadter, K. R., Chacon, L., and Miley, G. Mon . "Electron equilibrium and confinement in a modified Penning trap and its application to Penning fusion". United States. doi:10.1063/1.873987.
@article{osti_20216041,
title = {Electron equilibrium and confinement in a modified Penning trap and its application to Penning fusion},
author = {Barnes, D. C. and Schauer, M. M. and Umstadter, K. R. and Chacon, L. and Miley, G.},
abstractNote = {The Penning fusion concept is described. Recent theoretical work on eliminating limitations on thermonuclear gain (Q) associated with ion-ion collisions is reviewed. A critical issue identified is the demonstration of the desired spherical electron configuration. Constraints on the electron distribution function are derived. A small combined trap (majority electrons), PFX-I (Penning Fusion eXperiment-Ions) has been constructed to study these issues. PFX-I is described. Two diagnostics described for electrons are destructive dumping of trapped electrons and noninvasive optical detection of impact induced fluorescence. Initial results of PFX-I operation at applied voltages V{sub 0} up to 2 kV and magnetic fields B up to 1.14 T are described. Electron equilibrium is found to be consistent with trap filling to the space charge limit, with inventory proportional to V{sub 0} and independent of B. Electron confinement times range from 1 to 10 ms and are determined by neutral pressure. These results are interpreted and future directions sketched. (c) 2000 American Institute of Physics.},
doi = {10.1063/1.873987},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 5,
volume = 7,
place = {United States},
year = {2000},
month = {5}
}