Origin of the B-dot jump observed in precision liner experiments

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In the liner-ejecta experiments carried out at the Los Alamos pulsed power facility Pegasus II, a solid liner was magnetically imploded to impact on a target cylinder to produce the shock-induced ejecta. As a result of improved time resolution for the B-dot (dB/dt) probes fielded last fall, the authors began to notice a sharp jump in the B-dot curve occurring at a time very close to the expected liner-target collision time. This jump was also found in the time derivative of the calculated current (dI/dt) obtained from code simulation. They have shown that the jump is indeed caused by the ... continued below

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6 p.

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Lee, H.; Stokes, J.L. & Broste, W.B. September 1, 1995.

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In the liner-ejecta experiments carried out at the Los Alamos pulsed power facility Pegasus II, a solid liner was magnetically imploded to impact on a target cylinder to produce the shock-induced ejecta. As a result of improved time resolution for the B-dot (dB/dt) probes fielded last fall, the authors began to notice a sharp jump in the B-dot curve occurring at a time very close to the expected liner-target collision time. This jump was also found in the time derivative of the calculated current (dI/dt) obtained from code simulation. They have shown that the jump is indeed caused by the collision as a sudden change of the liner velocity would induce a sudden jump in the time derivative of the inductance. They have derived a general formula for calculating the jump in dI/dt and verified that the result computed from it is in good agreement with the code simulation. Useful diagnostic applications of the B-dot jump are discussed. This paper is relevant for magnetized target fusion.

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6 p.

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INIS; OSTI as DE95016894

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  • 10. Institute of Electrical and Electronics Engineers (IEEE) pulsed power conference, Albuquerque, NM (United States), 10-13 Jul 1995

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  • Other: DE95016894
  • Report No.: LA-UR--95-2388
  • Report No.: EGG--11265-5043;CONF-950750--27
  • Grant Number: W-7405-ENG-36;AC08-93NV11265
  • Office of Scientific & Technical Information Report Number: 102228
  • Archival Resource Key: ark:/67531/metadc622557

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  • September 1, 1995

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  • June 16, 2015, 7:43 a.m.

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  • Feb. 25, 2016, 10:16 p.m.

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Lee, H.; Stokes, J.L. & Broste, W.B. Origin of the B-dot jump observed in precision liner experiments, article, September 1, 1995; New Mexico. (digital.library.unt.edu/ark:/67531/metadc622557/: accessed December 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.