Accession Number : ADA292470

Title :   Development of a Transient Internal Probe Diagnostic.

Descriptive Note : Final rept. 15 Oct 92-14 Oct 94,

Corporate Author : WASHINGTON UNIV SEATTLE AEROSPACE AND ENERGETICS RESEARCH PROGRAM

Personal Author(s) : Jarboe, Thomas R. ; Mattick, Arthur T.

PDF Url : ADA292470

Report Date : 16 DEC 1994

Pagination or Media Count : 42

Abstract : A research effort was carried out to develop and test key components of the transient internal probe, a diagnostic tool for measuring internal magnetic fields in a plasma. A gasdynamic sabot separation method was developed for discarding the sabot upstream of the plasma. Separation is effected in a vented 50-caliber gun barrel, and the sabot is deflected upstream of the plasma, reliably removing the sabot without disrupting the probe trajectory. A vacuum interface was constructed to isolate the plasma from gun gases, which uses a very fast trap-door valve to prevent gas from entering the plasma chamber. A full-up test of the diagnostic was made using a 2.2 km/sec probe to measure a static field in a vacuum. This yielded excellent agreement with Hall probe measurements, with a resolution of 20 Gauss, and the gun gas entering the measurement chamber is to be acceptably small for application to plasma devices. (AN)

Descriptors :   *PROBES, *PLASMAS(PHYSICS), *DIAGNOSTIC EQUIPMENT, TEST AND EVALUATION, TRANSIENTS, ABLATION, MAGNETIC FIELDS, POLARIZATION, HIGH TEMPERATURE, HALL EFFECT, MAGNETOOPTICS, HIGH RESOLUTION, VACUUM CHAMBERS, GAS DYNAMICS, FARADAY EFFECT, PLASMA DEVICES, SABOT PROJECTILES, LIGHT GAS GUNS.

Subject Categories : Plasma Physics and Magnetohydrodynamics
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE