Determination of the energy of suprathermal electrons during lower hybrid current drive on PBX-M

Conference · Tue Jun 01 04:00:00 EDT 1993

OSTI ID:6275592

von Goeler, S; Bernabei, S; Davis, W; Ignat, D; Kaita, R; Roney, P; Stevens, J ^[1]; Jones, S ^[2]; Petravich, G ^[3]; Rimini, F ^[4]

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1. Princeton Univ., NJ (United States). Plasma Physics Lab.
2. Massachusetts Inst. of Tech., Cambridge, MA (United States). Plasma Fusion Center
3. Hungarian Academy of Sciences, Budapest (Hungary). Central Research Inst. for Physics
4. JET Joint Undertaking, Abingdon (United Kingdom)

Suprathermal electrons are diagnosed by a hard x-ray pinhole camera during lower hybrid current drive on PBX-M. The experimental hard x-ray images are compared with simulated images, which result from an integration of the relativistic bremsstrahlung along lines-of-sight through the bean-shaped plasma. Images with centrally peaked and radially hollow radiation profiles are easily distinguished. The energy distribution of the suprathermal electrons is analyzed by comparing images taken with different absorber foils. An effective photon temperature is derived from the experimental images, and a comparison with simulated photon temperatures yields the energy of the suprathermal electrons. The analysis indicates that the energy of the suprathermal electrons in the hollow discharges is in the 50 to 100 key range in the center of the discharge. There seems to exist a very small higher energy component close to the plasma edge.

• Research Organization: Princeton Univ., NJ (United States). Plasma Physics Lab.
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 6275592
• Report Number(s): PPPL-2910; CONF-9304112--18; ON: DE93015597
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700320* -- Plasma Diagnostic Techniques & Instrumentation-- (1992-)
700350 -- Plasma Production
Heating
Current Drive
& Interactions-- (1992-)
BREMSSTRAHLUNG
CAMERAS
CLOSED PLASMA DEVICES
COMPACT IGNITION TOKAMAK
DETECTION
ELECTROMAGNETIC RADIATION
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
LEPTONS
LOWER HYBRID CURRENT DRIVE
NON-INDUCTIVE CURRENT DRIVE
PLASMA DIAGNOSTICS
RADIATION DETECTION
RADIATIONS
THERMONUCLEAR DEVICES
THERMONUCLEAR REACTORS
TOKAMAK DEVICES
TOKAMAK TYPE REACTORS
X-RAY DETECTION