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Investigation of a laser driven vacuum diode X-ray source of photon energy ∼5 keV

Published online by Cambridge University Press:  01 July 1999

Yu.V. KOROBKIN
Affiliation:
P.N. Lebedev Physical Institute, Moscow, Russia
I.V. ROMANOV
Affiliation:
P.N. Lebedev Physical Institute, Moscow, Russia
A.A. RUPASOV
Affiliation:
P.N. Lebedev Physical Institute, Moscow, Russia
D.A. FEDIN
Affiliation:
P.N. Lebedev Physical Institute, Moscow, Russia
A.S. SHIKANOV
Affiliation:
P.N. Lebedev Physical Institute, Moscow, Russia
A. MOORTI
Affiliation:
Laser Programme, Centre for Advanced Technology, Indore 452 013, India
M. RAGHURAMIAH
Affiliation:
Laser Programme, Centre for Advanced Technology, Indore 452 013, India
J. UPADHYAY
Affiliation:
Laser Programme, Centre for Advanced Technology, Indore 452 013, India
S.R. KUMBHARE
Affiliation:
Laser Programme, Centre for Advanced Technology, Indore 452 013, India
S. SAILAJA
Affiliation:
Laser Programme, Centre for Advanced Technology, Indore 452 013, India
V. ARORA
Affiliation:
Laser Programme, Centre for Advanced Technology, Indore 452 013, India
P.A. NAIK
Affiliation:
Laser Programme, Centre for Advanced Technology, Indore 452 013, India
P.D. GUPTA
Affiliation:
Laser Programme, Centre for Advanced Technology, Indore 452 013, India

Abstract

An investigation of a monochromatic point X-ray source of photon energy ∼5 keV was carried out. The source was set up using a laser produced Al plasma as a cathode and a point-tip Ti anode. Optimum parameters of the diode were determined from experimental measurements of X-ray intensity dependence on laser pulse energy, applied accelerating voltage, and distance between target (cathode) and anode, using Nd:glass laser pulses (FWHM 30 ns) of 2 mJ to 4 J energy. Electron temperature characterization of the target plasma was also performed from the XUV emission spectrum (5–80 Å). Parameters of X radiation in Ti K-shells are (1) spectral brightness of ∼1020 photons/cm2-sec-sr-keV, (2) spatial size ∼300 microns, and (3) X-ray pulse duration less than 20 ns.

Type
Research Article
Copyright
1999 Cambridge University Press

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