Temporal development of hard and soft x-ray emission from a gas-puff Z-italic pinch

Journal Article · Fri Aug 01 04:00:00 EDT 1986 · Rev. Sci. Instrum.; (United States)

DOI:https://doi.org/10.1063/1.1138717· OSTI ID:5405804

Choi, P; Dangor, A E; Deeney, C; Challis, C D

Previous time- and space-resolved x-ray measurements on a small gas-puff Z-italic pinch indicated the presence of bursts of energetic electron beam and related ''hot spots'': high-temperature, high-density plasma regions. Spectra taken from these hot spots are consistent with a plasma of electron density about 10/sup 22/--10/sup 23/ cm/sup -3/ and electron temperature of 500 eV. Here we present time correlation of the hard x-ray emission from the anode with large fluctuations in I-dot and with short bursts of intense soft x rays. These soft x-ray bursts originating from the hot spots are shown always to be preceded by hard x-ray emissions. Using suitable apertures, the plasma is shown to be a source of hard x rays, <2.5 A-circle. This is confirmed by x-ray pinhole photographs. By varying the Z-italic of the anode the electron beam associated with hard x-ray emission is found to be of low energy (10 keV) agreeing with previous measurements. In particular a plastic, PTFE (Teflon), is shown to be a suitable material for the anode, with superior lifetime performance compared with conventional metallic substances.

• Research Organization: The Blackett Laboratory, Imperial College, London SW7 2BZ, England
• OSTI ID: 5405804
• Journal Information: Rev. Sci. Instrum.; (United States), Journal Name: Rev. Sci. Instrum.; (United States) Vol. 57:8; ISSN RSINA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102* -- Fusion Energy-- Plasma Research-- Diagnostics
ANODES
CAMERAS
CATHODES
ELECTRODES
ELECTROMAGNETIC RADIATION
EQUIPMENT
HARD X RADIATION
IONIZING RADIATIONS
LIFETIME
LINEAR PINCH DEVICES
LINEAR Z PINCH DEVICES
MEASURING INSTRUMENTS
OPEN PLASMA DEVICES
PERFORMANCE
PINCH DEVICES
PLASMA DIAGNOSTICS
RADIATION DETECTORS
RADIATIONS
SOFT X RADIATION
SPECTROMETERS
STREAK CAMERAS
THERMONUCLEAR DEVICES
X RADIATION
X-RAY EQUIPMENT
X-RAY SPECTROMETERS