Compact femtosecond electron diffractometer with 100 keV electron bunches approaching the single-electron pulse duration limit
Abstract
We present the design and implementation of a highly compact femtosecond electron diffractometer working at electron energies up to 100 keV. We use a multi-body particle tracing code to simulate electron bunch propagation through the setup and to calculate pulse durations at the sample position. Our simulations show that electron bunches containing few thousands of electrons per bunch are only weakly broadened by space-charge effects and their pulse duration is thus close to the one of a single-electron wavepacket. With our compact setup, we can create electron bunches containing up to 5000 electrons with a pulse duration below 100 fs on the sample. We use the diffractometer to track the energy transfer from photoexcited electrons to the lattice in a thin film of titanium. This process takes place on the timescale of few-hundred femtoseconds and a fully equilibrated state is reached within 1 ps.
- Authors:
-
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin (Germany)
- Publication Date:
- OSTI Identifier:
- 22413007
- Resource Type:
- Journal Article
- Journal Name:
- Journal of Applied Physics
- Additional Journal Information:
- Journal Volume: 117; Journal Issue: 4; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; BEAM BUNCHING; BEAM TRANSPORT; COMPUTERIZED SIMULATION; DESIGN; DIFFRACTOMETERS; ELECTRON BEAMS; ELECTRON DIFFRACTION; ELECTRONS; ENERGY TRANSFER; IMPLEMENTATION; KEV RANGE; SPACE CHARGE; THIN FILMS; TITANIUM; WAVE PACKETS
Citation Formats
Waldecker, Lutz, Bertoni, Roman, and Ernstorfer, Ralph. Compact femtosecond electron diffractometer with 100 keV electron bunches approaching the single-electron pulse duration limit. United States: N. p., 2015.
Web. doi:10.1063/1.4906786.
Waldecker, Lutz, Bertoni, Roman, & Ernstorfer, Ralph. Compact femtosecond electron diffractometer with 100 keV electron bunches approaching the single-electron pulse duration limit. United States. https://doi.org/10.1063/1.4906786
Waldecker, Lutz, Bertoni, Roman, and Ernstorfer, Ralph. 2015.
"Compact femtosecond electron diffractometer with 100 keV electron bunches approaching the single-electron pulse duration limit". United States. https://doi.org/10.1063/1.4906786.
@article{osti_22413007,
title = {Compact femtosecond electron diffractometer with 100 keV electron bunches approaching the single-electron pulse duration limit},
author = {Waldecker, Lutz and Bertoni, Roman and Ernstorfer, Ralph},
abstractNote = {We present the design and implementation of a highly compact femtosecond electron diffractometer working at electron energies up to 100 keV. We use a multi-body particle tracing code to simulate electron bunch propagation through the setup and to calculate pulse durations at the sample position. Our simulations show that electron bunches containing few thousands of electrons per bunch are only weakly broadened by space-charge effects and their pulse duration is thus close to the one of a single-electron wavepacket. With our compact setup, we can create electron bunches containing up to 5000 electrons with a pulse duration below 100 fs on the sample. We use the diffractometer to track the energy transfer from photoexcited electrons to the lattice in a thin film of titanium. This process takes place on the timescale of few-hundred femtoseconds and a fully equilibrated state is reached within 1 ps.},
doi = {10.1063/1.4906786},
url = {https://www.osti.gov/biblio/22413007},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 4,
volume = 117,
place = {United States},
year = {Wed Jan 28 00:00:00 EST 2015},
month = {Wed Jan 28 00:00:00 EST 2015}
}