A Plasma Focus device (2.2 kJ, 12 kV) is studied as a pulsed X-ray
source, operated with Argon at a filling pressure in the range of 0.7 to 2.5
mbar. The time resolved X-ray signals are measured with an array of PIN diode
detectors. The X-ray emission produced by the plasma focus discharge at various
pressures is investigated and compared. It is found that at the high pressure
regime of more than 1.5 mbar, very consistent and high output of X-ray
radiation is obtained, at the peak of the discharge current. A remarkable
increase of about five times of the average X-ray yield is achieved at optimum
pressure 1.7 mbar compared to that obtained at other pressures. An indirect
method to determine the electron temperature of the plasma is achieved by using
the array of 5 channel PIN diode detector coupled with Al foil of different
thicknesses. The result shows that the electron temperature of the plasma is 7
keV, when the operating pressure is at 1.7 mbar. The maximum total X-ray yield
is about 2.53 mJ per shot at optimum pressure, equivalent to the efficiency of
Cite this paper
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