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Heavy-ion-induced hydrodynamic motion in lead targets

Published online by Cambridge University Press:  17 May 2001

S. STÖWE ,
U. NEUNER ,
R. BOCK ,
M. DORNIK ,
V.E. FORTOV ,
U.N. FUNK ,
M. GEISSEL ,
S. GOLUBEV ,
D.H.H. HOFFMANN  and
M. KULISH
...Show all authors
S. STÖWE
Affiliation:
Gesellschaft für Schwerionenforschung Darmstadt, 64291 Darmstadt, Germany
U. NEUNER
Affiliation:
Gesellschaft für Schwerionenforschung Darmstadt, 64291 Darmstadt, Germany
R. BOCK
Affiliation:
Gesellschaft für Schwerionenforschung Darmstadt, 64291 Darmstadt, Germany
M. DORNIK
Affiliation:
Gesellschaft für Schwerionenforschung Darmstadt, 64291 Darmstadt, Germany
V.E. FORTOV
Affiliation:
Institute for Chemical Physics Research, 142432 Chernogolovka, Russia
U.N. FUNK
Affiliation:
Darmstadt University of Technology, Institute for Nuclear Physics, 64289 Darmstadt, Germany
M. GEISSEL
Affiliation:
Darmstadt University of Technology, Institute for Applied Physics, 64289 Darmstadt, Germany
S. GOLUBEV
Affiliation:
Institute of Theoretical and Experimental Physics, 117259 Moscow, Russia
D.H.H. HOFFMANN
Affiliation:
Gesellschaft für Schwerionenforschung Darmstadt, 64291 Darmstadt, Germany Darmstadt University of Technology, Institute for Nuclear Physics, 64289 Darmstadt, Germany
M. KULISH
Affiliation:
Institute for Chemical Physics Research, 142432 Chernogolovka, Russia
V. MINTSEV
Affiliation:
Institute for Chemical Physics Research, 142432 Chernogolovka, Russia
M. ROTH
Affiliation:
Darmstadt University of Technology, Institute for Applied Physics, 64289 Darmstadt, Germany
B. SHARKOV
Affiliation:
Institute of Theoretical and Experimental Physics, 117259 Moscow, Russia
A. SHUTOV
Affiliation:
Institute for Chemical Physics Research, 142432 Chernogolovka, Russia
P. SPILLER
Affiliation:
Gesellschaft für Schwerionenforschung Darmstadt, 64291 Darmstadt, Germany
M. STETTER
Affiliation:
Gesellschaft für Schwerionenforschung Darmstadt, 64291 Darmstadt, Germany
W. SÜSS
Affiliation:
Darmstadt University of Technology, Institute for Nuclear Physics, 64289 Darmstadt, Germany
N.A. TAHIR
Affiliation:
Darmstadt University of Technology, Institute for Nuclear Physics, 64289 Darmstadt, Germany
A. TAUSCHWITZ
Affiliation:
Gesellschaft für Schwerionenforschung Darmstadt, 64291 Darmstadt, Germany
V. YAKUSHEV
Affiliation:
Institute for Chemical Physics Research, 142432 Chernogolovka, Russia
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Abstract

The hydrodynamic response of metal targets to volume heating by energy deposition of intense heavy-ion beams was investigated experimentally. Recent improvements in beam parameters led to a marked increase in specific deposition power: 2·101040Ar18+ ions of 300 MeV/u focused to a spot size of 300 μm (σ) × 540 μm (σ) yield a specific deposition energy in solid lead of approximately 1 kJ/g in the Bragg peak, delivered within 250 ns [full width at half maximum (FWHM)]. This value allowed us for the first time to observe heavy-ion-beam-induced hydrodynamic expansion of metal volume targets. Measurements comprise expansion velocities of free surfaces of up to 290 ± 20 m/s, surface temperatures of ejected target matter of 1600–1750 K, and pressure waves in solid metal bulk targets of 0.16 GPa maximum absolute value and 0.8 μs FWHM. The experimental results agree well with the results of a 2D hydrodynamic code. Inside the interaction zone, which can only be accessed by simulation, maximum temperatures are 2800 K and maximum pressures are 3.8 GPa.

Type
Research Article
Information
Laser and Particle Beams , Volume 18 , Issue 4 , October 2000 , pp. 573 - 581
Copyright
© 2000 Cambridge University Press

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