Polymorphic phase transitions in metals have been investigated for a long time under dynamic loadings through usual dynamic compression diagnostics such as velocity and temperature measurements. Such measurements were valuable for revealing the key role of kinetic effects in most phase transition mechanisms. However, the information extracted was mostly macroscopic. Obtaining direct insight about the crystallographic structure under dynamic loadings is critical for understanding mechanisms governing shock-induced structural changes.

For example, in order to evidence a mixture phase or to determine the time scale of a transition, structural information may be extremely valuable. Over the last 20 years a significant number of X-ray diffraction experiments were carried under dynamic loading, either using laboratory X-ray sources or synchrotron radiation. We are developing a novel experimental setup based on a compact High Pulsed Power generator capable of producing intense X radiation through an X-pinch X-ray source. This source is specifically designed for time-resolved X-ray diffraction in Bragg geometry on gas gun experiments. Promising preliminary diffraction data obtained under static conditions are presented.

1.
Mabire
,
C.
and
Hereil
,
P.-L.
,
J. Phys. IV France
10
, pp.
9
749
–9-754, (
2000
).
2.
Greeff
,
C. W.
,
Rigg
,
P.A.
,
Knudson
,
M.D.
,
Hixson
,
R. S.
and
Gray
,
III
, G.T.,
CP706
,
Shock Compression of Condensed Matter-2003
, pp.
209
212
, (
2003
).
3.
Q.
Johnson
,
A.
Mitchell
, and
L.
Evans
,
Nature (London)
231
,
310
(
1971
).
4.
Y. M.
Gupta
 et al,
Rev. Sci. Instrum.
70
,
4008
(
1999
).
5.
D. H.
Kalantar
and al,
Phys. Rev. Lett.
95
(
7
),
075502
(
2005
).
6.
T.
d’Almeida
and
Y. M.
Gupta
,
Phys. Rev. Lett.
85
(
2
),
330
(
2000
).
7.
F.
Zucchini
,
S.N.
Bland
,
C.
Chauvin
,
Rev. Sci. Instrum.
86
,
033507
(
2015
).
8.
D. H.
Kalantar
and
D. A.
Hammer
,
Rev. Sci. Instrum.
66
,
779
(
1995
).
9.
T.A.
Shelkovenko
Phys. Plasmas
17
,
112707
(
2010
).
This content is only available via PDF.