| Issue |
Europhys. Lett.
Volume 73, Number 1, January 2006
|
|
|---|---|---|
| Page(s) | 42 - 48 | |
| Section | Physics of gases, plasmas and electric discharges | |
| DOI | https://doi.org/10.1209/epl/i2005-10364-y | |
| Published online | 02 December 2005 | |
Enhanced and reproducible X-ray emission in a low-energy plasma focus
1
Department of Physics, Quaid-i-Azam University - 45320 Islamabad, Pakistan
2
Natural Sciences Academics Group, National Institute of Education, Nanyang Technological University - 1 Nanyang Walk, 637616, Singapore
3
PINSTECH - P.O. Box 1331, 44000 Islamabad, Pakistan
Corresponding authors: mzakaullah@qau.edu.pk zaka_qau_pk@yahoo.com
Received:
21
July
2005
Accepted:
2
November
2005
The effect of pre-ionization by a shunt resistor on X-ray emission performance
from a low-energy (2.7
) plasma focus is investigated by employing time-resolved and time- integrated detectors. Different shunt resistors are
employed and 71
Ω is found the most appropriate in this experiment.
It is estimated that with pre-ionization 49.56
of energy is radiated as
X-rays, out of which 21.5 is in the form of 
-
lines in 4
-geometry. The pre-ionization enhances the X-ray yield, broadens the
working gas pressure range and improves the shot-to-shot reproducibility of
the system. The pinhole images of X-ray–emitting zones indicate that the
dominant X-ray emission is from the anode tip, although the emission from hot
spots along the pinch axis also contributes.
PACS: 52.59.Hq – Dense plasma focus / 52.58.Lq – Z-pinches, plasma focus, and other pinch devices
© EDP Sciences, 2005
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