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Ohmically heated high-density Z pinch

Description: The gross properties of a high-density (n approximately equal to 10$sup 27$ m$sup -3$), small-radius, (r = 10$sup -4$ m) gas-imbedded Z pinch have been examined considering only classical processes. The rate equation using only ohmic heating along with bremsstrahlung and radial heat transport shows that ohmic heating will rapidly take the pinch to thermonuclear temperatures for currents, I, greater than 1 MA. The radial heat loss for the pinch is very small for I greater than 1.5 MA. This sugge… more
Date: January 1, 1976
Creator: Hammel, J. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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High density Z pinch formed from a solid deuterium fiber

Description: Experiments in which 250 kA have been passed through a z-pinch column formed from a thin fiber of cryogenic solid deuterium have demonstrated unexpectedly stable behavior. It has been shown that it is possible to maintain a z pinch in near radial equilibrium while it is ohmically heated from 16/sup 0/K to several hundred eV. These results have motivated an effort to increase the plasma current to 1 MA and above, giving the potential of producing reactor-relevant plasmas capable of significant t… more
Date: January 1, 1987
Creator: Hammel, J. E. & Scudder, D. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Recent results on the dense Z-pinch

Description: A detailed description of the ongoing high density Z-pinch experiments at Los Alamos is given. A review of past dense experiments is included. A model for a dense Z pinch as a high-Q, low yield, reactor system is presented.
Date: January 1, 1982
Creator: Hammel, J. E.; Shlachter, J. S. & Scudder, D. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Dense Z-pinch plasmas

Description: Early researchers recogniZed the desirable features of the linear Z-pinch configuration as a magnetic fusion scheme. In particular, a Z-pinch reactor might not require auxiliary heating or external field coils, and could constitute an uncomplicated, high plasma ..beta.. geometry. The simple Z pinch, however, exhibited gross MHD instabilities that disrupted the plasma, and the linear Z pinch was abandoned in favor of more stable configurations. Recent advances in pulsed-power technology and an a… more
Date: July 12, 1985
Creator: Shlachter, J. S.; Hammel, J. E. & Scudder, D. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Los Alamos compact toroid, fast-liner, and high-density Z-pinch programs

Description: The Compact Toroid (CT) and High Density Z-Pinch (HDZP) are two of the plasma configurations presently being studied at Los Alamos. The purpose of these two programs, plus the recently terminated (May 1979) Fast Liner (FL) program, is summarized in this section along with a brief description of the experimental facilities. The remaining sections summarize the recent results and the experimental status.
Date: March 1, 1981
Creator: Linford, R. K.; Sherwood, A. R. & Hammel, J. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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High-voltage technology for the LASL implosion-heating experiment

Description: The implosion-heating power supply uses four 125-kV generators in series. Each generator consists of a fast 125-kV pulse-forming network made up of capacitors attached to a 1m-wide parallel-plate transmission line which is fed through multiple cables from a 2.5- mu F, 0.5- mu H Marx bank charged to 180 kV. To simplify construction it was decided to do without oil or water for high- voltage insulation and grading. The developments described here are: (1) a low- inductance connection between the … more
Date: January 1, 1973
Creator: Hammel, J. E.; Henins, I.; Marshall, J. & Sherwood, A. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Design of a high-voltage generator for the LASL implosion-heating experiment

Description: The goals of the LASL implosion-heating experiment are to learn more about the physical processes involved in the initial implosion of a theta pinch and to find ways of euhancing the amount of implosion heating. The design parameters chosen for the experiment are: an initial plasma density of 10/sup 15/ deuterons per cm/sup 3/, a 40-cm-diameter discharge tube, a coil length of one meter, an initial electric field of 2 kV/cm applied to the inside of the discharge tube, and a magnetic field of l0… more
Date: January 1, 1973
Creator: Hammel, J. E.; Henins, I.; Marshall, J. & Sherwood, A. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The Los Alamos solid-deuterium-fiber z pinch: Experiment and theory

Description: Experiments in which 250 kA have been passed through a z-pinch column formed from a thin fiber of cryogenic solid deuterium have demonstrated unexpectedly stable behavior. It has been shown that it is possible to maintain a z pinch in near radial equilibrium while it is ohmically heated from 16/sup 0/ K to several hundred eV. These encouraging results have motivated an effort to increase the plasma current to 1 MA and above, giving the potential of producing reactor-relevant plasmas capable of … more
Date: January 1, 1987
Creator: Hammel, J. E.; Scudder, D. W.; Glasser, A.; Lindman, E. & Nebel, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The Physics of the High Density Z-Pinch

Description: The fiber-initiated High-Density Z-Pinch (HDZP) is a novel concept in which fusion plasma could be produced by applying 2 MV along a thin filament of frozen deuterium, 20-30 ..mu..m in diameter, 5-10 cm long. The megamp-range currents that result would ohmically heat the fiber to fusion temperatures in 100 ns while maintaining nearly constant radius. The plasma pressure would be held stably by the self-magnetic field for many radial sound transit times during the current-rise phase while, in th… more
Date: January 1, 1988
Creator: Glasser, A. H.; Hammel, J. E.; Lewis, H. R.; Lindemuth, I. R.; McCall, G. H.; Nebel, R. A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The Los Alamos megamp fiber z-pinch experiment

Description: The HDZP-II experiment uses a 2 MV, 1.9 {Omega}, 1.2 MA, 100 ns risetime pulsed-power driver. Preliminary experiments have been performed at 600--800 kA (half the bank energy). Preliminary results show the plasma heating to several kilovolts (although a non-Maxwellian distribution is likely) while maintaining an overall straight and reasonably uniform axial configuration. However, interferograms and x-ray pinhole photographs show the column expanding rapidly with considerable small-scale struct… more
Date: January 1, 1990
Creator: Scudder, D. W.; Shlachter, J. S.; Hammel, J. E.; Venneri, F.; Chrien, R. (Los Alamos National Lab., NM (USA)); Lovberg, R. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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