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Equation-of-state studies using a 10-Hz Nd:YAG laser oscillator

Published online by Cambridge University Press:  25 March 2004

M. SHUKLA,
A. UPADHYAY,
V.K. SENECHA,
P. KHARE,
S. BANDYAOPADHYAY,
V.N. RAI,
C.P. NAVATHE,
H.C. PANT,
M. KHAN and
B.K. GODWAL
M. SHUKLA
Affiliation:
High Pressure Physics Division, Bhabha Atomic Research Center, Mumbai, India
A. UPADHYAY
Affiliation:
Laser Plasma Division, Center for Advanced Technology, Indore, India
V.K. SENECHA
Affiliation:
Laser Plasma Division, Center for Advanced Technology, Indore, India
P. KHARE
Affiliation:
Laser Plasma Division, Center for Advanced Technology, Indore, India
S. BANDYAOPADHYAY
Affiliation:
Laser Plasma Division, Center for Advanced Technology, Indore, India
V.N. RAI
Affiliation:
Laser Plasma Division, Center for Advanced Technology, Indore, India
C.P. NAVATHE
Affiliation:
Laser Plasma Division, Center for Advanced Technology, Indore, India
H.C. PANT
Affiliation:
Hon. Visitor, High Pressure Physics Division, Bhabha Atomic Research Center, Mumbai, India
M. KHAN
Affiliation:
Center for Plasma Studies, Jadavpur University, Kolkata, India
B.K. GODWAL
Affiliation:
High Pressure Physics Division, Bhabha Atomic Research Center, Mumbai, India
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Abstract

A commercial mode locked cavity dumped Nd:YAG dye laser operating at 10 Hz repetition rate is modified to produce a high contrast (>5000:1) single laser pulse while maintaining the energy stability and high beam quality. A trigger generator biases the cavity dumping photodiode, which is triggered externally by a pulse from the microprocessor-based control unit controlling a ∼2 J/200 ps laser chain. In the laser chain, the high contrast (>5000:1) is achieved by an external pulse selector based on single Pockel's cell to select a single laser pulse of high contrast, which is a prerequisite for experimental study of the equation of state. Laser-induced shock velocity measurement in thin aluminum, gold on aluminum, and copper on aluminum foil targets using this modified laser system are also presented. The equation of state of Al, Au, and Cu obtained using an impedance matching technique are in agreement with the reported results of SESAME and simulation results.

Keywords

Equation of statePrepulsePressure Hugoniot

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Type
Research Article
Information
Laser and Particle Beams , Volume 21 , Issue 4 , October 2003, pp. 615 - 626
Copyright
© 2003 Cambridge University Press

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References

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