Accession Number:
ADA275054
Title:
Transient Internal Probe
Descriptive Note:
Final technical rept. 15 Sep 1990-15 Oct 1993
Corporate Author:
WASHINGTON UNIV SEATTLE AEROSPACE AND ENERGETICS RESEARCH PROGRAM
Personal Author(s):
Report Date:
1993-12-15
Pagination or Media Count:
59.0
Abstract:
The Transient Internal Probe TIP diagnostic is a novel method for probing the interior of hot magnetic fusion plasmas that are inaccessible with ordinary stationary probes. A small probe of magneto-optic Verdet material is fired through a plasma at speeds of several kmsec, illuminated by a laser beam. The beams polarization is rotated in the probe by the local magnetic field and retroreflection back to a polarimetry detector allows determination of the B- field profile across the diameter of a plasma at a spatial resolution of better than 1-cm and an absolute B-field resolution of a few tens of Gauss. The principal components of a TIP diagnostic system were developed and tested. A two-stage light gas gun was constructed that accelerates 30-caliber projectiles to 3 kmsec, and methods were examined for stripping a lexan sabot from a probe prior to entry into a plasma. Probes of CdMnTe and FR-5 Verdet glass were fabricated, and a polarimetry system was constructed for resolving polarization to within 0.25 deg. The diagnostic was validated by measuring a static B-field with a moving dropped TIP probe, and finding agreement with Hall-probe measurements to within experimental accuracy 40 gauss
Descriptors:
- *TRANSIENTS
- *PROBES
- *PLASMAS(PHYSICS)
- *INTERNAL
- VELOCITY
- ABLATION
- POLARIZATION
- PROJECTILES
- DIAMONDS
- GLASS
- GAS GUNS
- ROTATION
- FARADAY EFFECT
- STATICS
- CADMIUM
- TELLURIDES
- STATIONARY
- PROFILES
- LASER BEAMS
- LIGHT GAS GUNS
- SABOTS
- MANGANESE
- POLARIMETRY
- RESOLUTION
- MATERIALS
- DETECTORS
- MAGNETIC FIELDS
- MEASUREMENT
- OPTICS
Subject Categories:
- Electricity and Magnetism
- Optics
- Plasma Physics and Magnetohydrodynamics