Experimental studies of field-reversed-configuration (FRC) confinement in FRX-C

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A primary purpose of the large bore (0.5 m dia.) FRX-C field-reversed theta pinch experiment is to study the scaling of plasma particle containment time, tau/sub N/, with major radius, R, of the field-reversed configuration (FRC). At 20 mtorr fill pressure the FRX-C plasma parameters, anti n approx. 4 x 10/sup 15/ c/sup -3/, T/sub e/ approx. 100 eV, T/sub i/ approx. 150 eV, are comparable to those obtained in the smaller bore (0.25 m dia.) FRX-B device. Under these conditions, the present measurement of particle confinement time in FRX-C is tau/sub N/ approx. 140 ..mu..s, consistent with the scaling ... continued below

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Pages: 13

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Siemon, R.E.; Armstrong, W.T. & Bartsch, R.R. January 1, 1982.

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A primary purpose of the large bore (0.5 m dia.) FRX-C field-reversed theta pinch experiment is to study the scaling of plasma particle containment time, tau/sub N/, with major radius, R, of the field-reversed configuration (FRC). At 20 mtorr fill pressure the FRX-C plasma parameters, anti n approx. 4 x 10/sup 15/ c/sup -3/, T/sub e/ approx. 100 eV, T/sub i/ approx. 150 eV, are comparable to those obtained in the smaller bore (0.25 m dia.) FRX-B device. Under these conditions, the present measurement of particle confinement time in FRX-C is tau/sub N/ approx. 140 ..mu..s, consistent with the scaling tau/sub N/ ..cap alpha.. R/sup 2/, when compared with the earlier FRX-B results. This favorable scaling has been observed with R/rho/sub i/ approx. 30 (rho/sub i/ = ion gyro radius), twice as large as in FRX-B, despite theoretical indications that various MHD instabilities would appear as R/rho/sub i/ was increased. The characteristics of hotter, neutron generating FRC plasma produced at lower fill pressure (5 mtorr), where anti n approx. 2 x 10/sup 15/ cm/sup -3/, T/sub e/ approx. 170 eV, T/sub i/ approx. 600 eV, are also presented. In this plasma regime an accurate determination of tau/sub N/ is difficult because of the short stable period observed.

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Pages: 13

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NTIS, PC A02/MF A01.

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  • 9. international conference on plasma physics and controlled nulcear fusion research, Baltimore, MD, USA, 1 Sep 1982

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  • Other: DE82022014
  • Report No.: LA-UR-82-2543
  • Report No.: CONF-820930-14
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 5027388
  • Archival Resource Key: ark:/67531/metadc1058339

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  • January 1, 1982

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  • Jan. 22, 2018, 7:23 a.m.

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  • Feb. 2, 2018, 11:55 a.m.

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Siemon, R.E.; Armstrong, W.T. & Bartsch, R.R. Experimental studies of field-reversed-configuration (FRC) confinement in FRX-C, article, January 1, 1982; New Mexico. (digital.library.unt.edu/ark:/67531/metadc1058339/: accessed October 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.