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Title: Femtosecond MeV Electron Energy-Loss Spectroscopy

Journal Article · · Physical Review Applied
 [1];  [1]
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States)

Pump-probe electron energy-loss spectroscopy (EELS) with femtosecond temporal resolution will be a transformative research tool for studying non-equilibrium chemistry and electronic dynamics of matter. In this paper, we propose a new concept of femtosecond EELS utilizing mega-electron-volt electron beams from a radio-frequency (rf) photocathode source. The high acceleration gradient and high beam energy of the rf gun are critical to the generation of 10-femtosecond electron beams, which enables improvement of the temporal resolution by more than one order of magnitude beyond the state of the art. The major innovation in our proposal - the `reference-beam technique', relaxes the energy stability requirement on the rf power source by roughly two orders of magnitude. Requirements on the electron beam quality, photocathode, spectrometer and detector are also discussed. Supported by particle-tracking simulations, we demonstrate the feasibility of achieving sub-electron-volt energy resolution and ~10-femtosecond temporal resolution with existing or near-future hardware performances.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
AC02-76SF00515; 2016YFA0202500; AC02-05CH11231
OSTI ID:
1410519
Alternate ID(s):
OSTI ID: 1408163; OSTI ID: 1418213
Journal Information:
Physical Review Applied, Vol. 8, Issue 5; ISSN 2331-7019
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 5 works
Citation information provided by
Web of Science

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Cited By (2)

Ultrafast electron energy-loss spectroscopy in transmission electron microscopy journal July 2018
Ultrafast electron energy-loss spectroscopy in transmission electron microscopy preprint January 2019

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