Hostname: page-component-586b7cd67f-dsjbd Total loading time: 0 Render date: 2024-11-25T22:53:17.973Z Has data issue: false hasContentIssue false
  • English
  • Français

Time-resolved hard X-ray emission from a small plasma focus

Published online by Cambridge University Press:  09 March 2009

S.P. Moo  and
C.S. Wong
S.P. Moo
Affiliation:
Plasma Research Laboratory, Physics Department, University of Malaya, 59100 Kuala Lumpur, Malaysia
C.S. Wong
Affiliation:
Plasma Research Laboratory, Physics Department, University of Malaya, 59100 Kuala Lumpur, Malaysia
Get access Rights & Permissions [Opens in a new window]

Abstract

Some results of an experimental study of the hard X rays emitted from a 15-kV, 3-kJ plasma focus operated in argon are reported. The temporal evolution of the hard X rays detected by a plastic scintillator-photomultiplier detector and the voltage across the focus tube measured by a resistive voltage divider are simultaneously recorded on a two-channel digitizing oscilloscope. Metal absorbers of various thicknesses are used to provide some indications of the energies of the X rays. When the time delay of the detector system with respect to the anode voltage is taken into account, the hard X rays are observed to be emitted about 15 ns before the peak of the anode voltage and last for about 100 ns. There are two periods of emission, the X rays emitted in the first period being more intense, more energetic, and more directional than the X rays emitted in the second period. The X rays are attributed to the bombardment of the anode by energetic electrons generated in the pinch and the disruption phases of the focus.

Type
Regular Papers
Information
Laser and Particle Beams , Volume 13 , Issue 1 , March 1995 , pp. 129 - 134
Copyright
Copyright © Cambridge University Press 1995

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Bernstein, M.J. et al. 1969 Phys. Fluids 12, 2193.CrossRefGoogle Scholar
Brzosko, J.S. et al. 1987 Fusion Tech. 12, 71.CrossRefGoogle Scholar
Choi, P. et al. 1990 Laser Part. Beam 8, 469.CrossRefGoogle Scholar
Harries, W.L. et al. 1978 Plasma Phys. 20, 95.CrossRefGoogle Scholar
Herziger, G. et al. 1978 Phys. Lett. 69A, 37.CrossRefGoogle Scholar
Jalufka, N.W. & Lee, J.H. 1972 Phys. Fluids 15, 1954.CrossRefGoogle Scholar
Lee, S. et al. 1988 Am. J. Phys. 56, 62.CrossRefGoogle Scholar
Saloman, E.B. et al. 1988 Atomic Data and Nuclear Data Tables 38, 1.CrossRefGoogle Scholar
Stygar, W. et al. 1982 Nucl. Fusion 22, 1161.CrossRefGoogle Scholar
Yamamoto, T. et al. 1985 Japan J. Appl. Phys. 24, 324.CrossRefGoogle Scholar