Improved system for perpendicular electron-cyclotron emission measurements on TMX-Upgrade

Conference · Fri Mar 07 00:00:00 EST 1986

OSTI ID:6088252

Lasnier, C J; Ellis, R F; James, R A

Perpendicular electron-cyclotron emission (PECE) is used on TMX-U to diagnose thermal-barrier hot electrons (T/sub H/ approx. 100 to 400 keV); yielding the time history of the temperature of these relativistic electrons. We describe an improved quasi-optical viewing system for these measurements that uses high sensitivity superheterodyne receivers at fixed frequencies of 60, 98, 130, and 196 GHz. The improved viewing and transport system consists of an off-axis ellipsoidal mirror that images the plasma onto a V-band conical collection horn, an overmoded circular waveguide (7/8'' diam) that transports the radiation outside the vacuum vessel where the polarization is selected, and a high absorptivity Macor beam dump to prevent internal wall reflections from entering the viewing system. A relativistic code is used to calculate optically thin PECE signals from relativistic electrons for various energy and pitch angle distributions. 4 refs., 4 figs.

• Research Organization: Maryland Univ., College Park (USA); Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6088252
• Report Number(s): UCRL-93883; CONF-860324-8; ON: DE86008022
• Resource Relation: Conference: 6. topical conference on high temperature plasma diagnostics, Hilton Head Island, SC, USA, 9 Mar 1986; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
PLASMA DIAGNOSTICS
ELECTRON CYCLOTRON-RESONANCE
ELECTRON TEMPERATURE
TMX DEVICES
EMISSION SPECTRA
RELATIVISTIC PLASMA
CYCLOTRON RESONANCE
MAGNETIC MIRRORS
OPEN PLASMA DEVICES
PLASMA
RESONANCE
SPECTRA
TANDEM MIRRORS
THERMONUCLEAR DEVICES
700102* - Fusion Energy- Plasma Research- Diagnostics