Single-shot mega-electronvolt ultrafast electron diffraction for structure dynamic studies of warm dense matter
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Univ. of Duisburg-Essen, Duisburg (Germany). Faculty of Physics and Centre for Nanointegration
We have developed a single-shot mega-electronvolt ultrafast-electron-diffraction system to measure the structural dynamics of warm dense matter. The electron probe in this system is featured by a kinetic energy of 3.2 MeV and a total charge of 20 fC, with the FWHM pulse duration and spot size at sample of 350 fs and 120 µm respectively. We demonstrate its unique capability by visualizing the atomic structural changes of warm dense gold formed from a laser-excited 35-nm freestanding single-crystal gold foil. The temporal evolution of the Bragg peak intensity and of the liquid signal during solid-liquid phase transition are quantitatively determined. This experimental capability opens up an exciting opportunity to unravel the atomic dynamics of structural phase transitions in warm dense matter regime
- Research Organization:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC02-76SF00515; 100182
- OSTI ID:
- 1288561
- Alternate ID(s):
- OSTI ID: 1360162
- Journal Information:
- Review of Scientific Instruments, Vol. 87, Issue 11; Conference: 21.Topical Conference on High-Temperature Plasma Diagnostics, Madison, Wisconsin, USA, June 2016, Madison, WI (United States), 5-9 Jun 2016; ISSN 0034-6748
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Similar Records
Ultrafast visualization of phase transitions in nonequilibrium warm dense matter
A single-shot spatial chirp method for measuring initial AC conductivity evolution of femtosecond laser pulse excited warm dense matter