Journal article
Observation of ultrafast nonequilibrium collective dynamics in warm dense hydrogen.
- Abstract:
- We investigate ultrafast (fs) electron dynamics in a liquid hydrogen sample, isochorically and volumetrically heated to a moderately coupled plasma state. Thomson scattering measurements using 91.8 eV photons from the free-electron laser in Hamburg (FLASH at DESY) show that the hydrogen plasma has been driven to a nonthermal state with an electron temperature of 13 eV and an ion temperature below 0.1 eV, while the free-electron density is 2.8x10{20} cm{-3}. For dense plasmas, our experimental data strongly support a nonequilibrium kinetics model that uses impact ionization cross sections based on classical free-electron collisions.
- Publication status:
- Published
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- Publisher copy:
- 10.1103/physrevlett.104.125002
Authors
- Journal:
- Physical Review Letters More from this journal
- Volume:
- 104
- Issue:
- 12
- Pages:
- 125002
- Publication date:
- 2010-03-01
- DOI:
- EISSN:
-
1079-7114
- ISSN:
-
0031-9007
- Language:
-
English
- Pubs id:
-
pubs:53342
- UUID:
-
uuid:1bdac135-83e1-41a1-83ab-dbb74c7a9db1
- Local pid:
-
pubs:53342
- Source identifiers:
-
53342
- Deposit date:
-
2012-12-19
- ARK identifier:
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- Copyright date:
- 2010
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