Title :
Measurement of the current and symmetry of the impact liner on the NTLX experiments
Author :
Stokes, J. ; Tabaka, L. ; Parker, J. ; Anderson, D. ; Corrow, R. ; Prichett, R.
Author_Institution :
Los Alamos Nat. Lab., NM, USA
Abstract :
Summary form only given, as follows. Recent experiments were conducted on the Shiva Star capacitor bank at the AFRL. These Near Term Liner Experiments (NTLX) magnetically imploded an aluminum liner onto a central target. Measurements of the driving currents in these experiments are required for the initial conditions needed in modeling calculations of the experiments conducted in the target cylinders. A Faraday rotation measurement was fielded on Shiva Star to measure the current and compare with the current measured by a Rogowski coil technique. The Faraday rotation technique easily measured the 16 MA currents in these experiments. In addition, six B-dot probes were fielded at equal angles around a circle in the powerflow channel to measure the symmetry of the liner impact on the target cylinder. The B-dot probes measured the I-dot of the system, which has a jump when the liner impacts the target cylinder. A high-pass filter allows one to measure this jump more accurately and from the timing of this jump the symmetry of the impact was measured.
Keywords :
Faraday effect; explosions; fusion reactor ignition; fusion reactor materials; fusion reactor targets; high-pass filters; plasma probes; plasma production; symmetry; 16 MA; Al; Al liner; B-dot probes; Faraday rotation measurement; Faraday rotation technique; I-dot; NTLX Experiments; Near Term Liner Experiments; Rogowski coil technique; Shiva Star; Shiva Star capacitor bank; central target; current; driving currents; high-pass filters; impact liner; initial conditions; liner impact; liner impacts; powerflow channel; symmetry; target cylinder; target cylinders; timing; Aluminum; Current measurement; Fiber lasers; Hydrodynamics; Laboratories; Laser modes; Magnetic field measurement; Optical imaging; Probes; Rotation measurement;
Conference_Titel :
Pulsed Power Plasma Science, 2001. IEEE Conference Record - Abstracts
Conference_Location :
Las Vegas, NV, USA
Print_ISBN :
0-7803-7141-0
DOI :
10.1109/PPPS.2001.961075