We have observed the lattice expansion before the onset of compression in an optical-laser-driven target, using diffraction of femtosecond X-ray beams generated by the SPring-8 Angstrom Compact Free-electron Laser. The change in diffraction angle provides a direct measure of the lattice spacing, allowing the density to be calculated with a precision of ±1%. From the known equation of state relations, this allows an estimation of the temperature responsible for the expansion as <1000 K. The subsequent ablation-driven compression was observed with a clear rise in density at later times. This demonstrates the feasibility of studying the dynamics of preheating and shock formation with unprecedented detail.

1.
M. G.
Gorman
,
R.
Briggs
,
E. E.
McBride
,
A.
Higginbotham
,
B.
Arnold
,
J. H.
Eggert
,
D. E.
Fratanduono
,
E.
Galtier
,
A. E.
Lazicki
,
H. J.
Lee
,
H. P.
Liermann
,
B.
Nagler
,
A.
Rothkirch
,
R. F.
Smith
,
D. C.
Swift
,
G. W.
Collins
,
J. S.
Wark
, and
M. I.
McMahon
, “
Direct observation of melting in shock-compressed bismuth with femtosecond X-ray diffraction
,”
Phys. Rev. Lett.
115
,
095701
(
2015
).
2.
G. B.
Stephenson
,
A.
Robert
, and
G.
Grübel
, “
X-ray spectroscopy: Revealing the atomic dance
,”
Nat. Mater.
8
(
9
),
702
703
(
2009
).
3.
P. F.
McMillan
, “
New materials from high-pressure experiment
,”
Nat. Mater.
1
,
19
25
(
2002
).
4.
R. A.
Graham
,
B.
Morosin
,
E. L.
Venturini
, and
M. J.
Carr
, “
Materials modification and synthesis under high pressure shock compression
,”
Rev. Mater. Sci.
16
(
1
),
315
341
(
1986
).
5.
W. J.
Nellis
, “
Dynamic compression of materials: Metallization of fluid hydrogen at high pressures
,”
Rep. Prog. Phys.
69
,
1479
1580
(
2006
).
6.
R. P.
Drake
and
P. A.
Norreys
, “
Focus on high energy density physics
,”
New J. Phys.
16
(
6
),
065007
(
2014
).
7.
L.
Dubrovinsky
,
N.
Dubrovinskaia
,
O.
Narygina
,
I.
Kantor
,
A.
Kuznetzov
,
V. B.
Prakapenka
,
L.
Vitos
,
B.
Johansson
,
A. S.
Mikhaylushkin
,
S. I.
Simak
, and
I. A.
Abrikosov
, “
Body-centered cubic iron-nickel alloy in Earth's core
,”
Science
316
,
1880
1884
(
2007
).
8.
R. S.
McWilliams
,
D. K.
Spaulding
,
J. H.
Eggert
,
P. M.
Celliers
,
D. G.
Hicks
,
R. F.
Smith
,
G. W.
Collins
, and
R.
Jeanloz
, “
Phase transformations and metallization of magnesium oxide at high pressure and temperature
,”
Science
338
,
1330
1333
(
2012
).
9.
D.
Milathianaki
,
S.
Boutet
,
G. J.
Williams
,
A.
Higginbotham
,
D.
Ratner
,
A. E.
Gleason
,
M.
Messerschmidt
,
M. M.
Seibert
,
D. C.
Swift
,
P.
Hering
,
J.
Robinson
,
W. E.
White
, and
J. S.
Wark
, “
Femtosecond visualization of lattice dynamics in shock-compressed matter
,”
Science
342
(
6155
),
220
(
2013
).
10.
G.
Hammersley
,
L. A.
Hackel
, and
F.
Harris
, “
Surface prestressing to improve fatigue strength of components by laser shot peening
,”
Opt. Lasers Eng.
34
(
4–6
),
327
337
(
2000
).
11.
R.
Ernstorfer
,
M.
Harb
,
C. T.
Hebeisen
,
G.
Sciaini
,
T.
Dartigalongue
, and
R. J. D.
Miller
, “
The formation of warm dense matter: Experimental evidence for electronic bond hardening in gold
,”
Science
323
(
5917
),
1033
1037
(
2009
).
12.
J.
Hohlfeld
,
S.
Wellershoff
,
J.
Gudde
,
U.
Conrad
,
V.
Jahnke
, and
E.
Matthias
, “
Electron and lattice dynamics following optical excitation of metals
,”
Chem. Phys.
251
,
237
258
(
2000
).
13.
M.
Yokoo
,
N.
Kawai
,
K. G.
Nakamura
,
K. I.
Kondo
,
Y.
Tange
, and
T.
Tsuchiya
, “
Ultrahigh-pressure scales for gold and platinum at pressures up to 550 GPa
,”
Phys. Rev. B: Condens. Matter Mater. Phys.
80
(
10
),
104114
(
2009
).
14.
S. H.
Shim
,
T. S.
Duffy
, and
K.
Takemura
, “
Equation of state of gold and its application to the phase boundaries near 660 km depth in Earth's mantle
,”
Earth Planet. Sci. Lett.
203
(
2
),
729
739
(
2002
).
15.
T.
Kenichi
, “
Evaluation of the hydrostaticity of a helium-pressure medium with powder x-ray diffraction techniques
,”
J. Appl. Phys.
89
(
1
),
662
668
(
2001
).
16.
K.
Tono
,
T.
Togashi
,
Y.
Inubushi
,
T.
Sato
,
T.
Katayama
,
K.
Ogawa
,
H.
Ohashi
,
H.
Kimura
,
S.
Takahashi
,
K.
Takeshita
,
H.
Tomizawa
,
S.
Goto
,
T.
Ishikawa
, and
M.
Yabashi
, “
Beamline, experimental stations and photon beam diagnostics for the hard x-ray free electron laser of SACLA
,”
New J. Phys.
15
,
083035
(
2013
).
17.
T. A.
Pikuz
,
A. Y.
Faenov
,
N.
Ozaki
,
N. J.
Hartley
,
B.
Albertazzi
,
T.
Matsuoka
,
K.
Takahashi
,
H.
Habara
,
S.
Matsuyama
,
K.
Yamauchi
,
R.
Ochante
,
K.
Sueda
,
O.
Sakata
,
T.
Sekine
,
T.
Sato
,
Y.
Umeda
,
T.
Yabuuchi
,
T.
Togashi
,
T.
Katayama
,
M.
Yabashi
,
M.
Harmand
,
G.
Morard
,
M.
Koenig
,
V.
Zhakhovsky
,
N.
Inogamov
,
A. S.
Safronova
,
A.
Stafford
,
I. Y.
Skobelev
,
S. A.
Pikuz
,
T.
Okuchi
,
Y.
Seto
,
K. A.
Tanaka
, and
R.
Kodama
, “
Indirect monitoring shot-to-shot shock waves strength reproducibility during pump-probe experiments
,”
J. Appl. Phys.
120
,
035901
(
2016
).
18.
A. L.
Patterson
, “
The Scherrer formula for I-ray particle size determination
,”
Phys. Rev.
56
,
978
982
(
1939
).
19.
P.
Vinet
,
J. R.
Smith
,
J.
Ferrante
, and
J. H.
Rose
, “
Temperature effects on the universal equation of state
,”
Phys. Rev. B
35
(
4
),
1945
(
1987
).
20.
D. L.
Heinz
and
R.
Jeanloz
, “
The equation of state of the gold calibration standard
,”
J. Appl. Phys.
55
(
4
),
885
893
(
1984
).
21.
E. G.
Gamaly
, “
The physics of ultra-short laser interaction with solids at non-relativistic intensities
,”
Phys. Rep.
508
(
4–5
),
91
243
(
2011
).
22.
S.
Amoruso
,
N. N.
Nedyalkov
,
X.
Wang
,
G.
Ausanio
,
R.
Bruzzese
, and
P. A.
Atanasov
, “
Ultrafast laser ablation of gold thin film targets
,”
J. Appl. Phys.
110
(
12
),
124303
(
2011
).
23.
M.
Nicoul
,
U.
Shymanovich
,
A.
Tarasevitch
,
D.
von der Linde
, and
K.
Sokolowski-Tinten
, “
Picosecond acoustic response of a laser-heated gold-film studied with time-resolved x-ray diffraction
,”
Appl. Phys. Lett.
98
(
19
),
191902
(
2011
).
24.
T. G.
White
,
P.
Mabey
,
D. O.
Gericke
,
N. J.
Hartley
,
H. W.
Doyle
,
D.
Mcgonegle
,
D.
Rackstraw
,
A.
Higginbotham
, and
G.
Gregori
, “
Electron-ion equilibration in laser heated gold films
,”
Phys. Rev. B
90
(
1
),
014305
(
2014
).
25.
B. C.
Stuart
,
M. D.
Feit
,
S.
Herman
,
A. M.
Rubenchik
,
B. W.
Shore
, and
M. D.
Perry
, “
Optical ablation by high-power short-pulse lasers
,”
J. Opt. Soc. Am. B
13
(
2
),
459
(
1996
).
26.
T.
Tsuchiya
, “
First-principles prediction of the P-V-T equation of state of gold and the 660-km discontinuity in Earth's mantle
,”
J. Geophys. Res.
108
,
1
9
, doi: (
2003
).
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