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Biplanar vacuum photodiode; x-ray emission; laser plasma; magnetic field

Development of a single and multichannel biplanar vacuum photodiode for x-ray detection is reported, which has been used to study the x-ray emission from laser produced plasma expanding across an externally applied magnetic field. Two to three times enhancement in x-ray emission has been observed which was found correlated with decrease in size of the x-ray emitting plasma plume (expansion velocity of plasma). Experimental observations were found in close agreement with the analytical model based on an increase in plasma density as a result of plasma confinement in magnetic field. Temporal evolution of x-ray emission indicates that recombination radiation seems to be playing an important role in x-ray enhancement.

V N Rai¹ M Shukla¹ H C Pant¹

1. Laser Plasma Laboratory, Centre for Advanced Technology, Indore - 452 013, India

Published

January 1999

Manuscript received

27 August 1997

Manuscript revised

3 August 1998