skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Femtosecond gas-phase mega-electron-volt ultrafast electron diffraction

Journal Article · · Structural Dynamics
DOI:https://doi.org/10.1063/1.5120864· OSTI ID:1572204

The development of ultrafast gas electron diffraction with non-relativistic electrons has enabled determination of molecular structures with atomic spatial resolution. It has, however, been challenging to break the picosecond temporal resolution barrier and achieve the goal that has long been envisioned – making space- and-time resolved molecular movies of chemical reaction in the gas-phase. Recently, an ultrafast electron diffraction (UED) apparatus using mega-electron-volt (MeV) electrons was developed at SLAC National Accelerator Laboratory for imaging ultrafast structural dynamics of molecules in the gas phase. The SLAC gas-phase MeV UED has achieved 70 fs root-mean-square temporal resolution, 0.63 Å spatial resolution, and 0.22 Å–1 reciprocal-space resolution. Such high spatial-temporal resolution has enabled the capturing of real-time molecular movies of fundamental photochemical mechanisms, such as chemical bond breaking, ring opening, and a nuclear wave packet crossing a conical intersection. In this paper, the design that enables the high spatial-temporal resolution of the SLAC gas phase MeV UED is presented. The compact design of the differential pump section of the SLAC gas phase MeV UED realized five orders-of-magnitude vacuum isolation between the electron source and gas sample chamber. The spatial resolution, temporal resolution and long-term stability of the apparatus are systematically characterized.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Univ. of Nebraska, Lincoln, NE (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division; USDOE
Grant/Contract Number:
AC02-76SF00515; SC0014170
OSTI ID:
1572204
Alternate ID(s):
OSTI ID: 1570490; OSTI ID: 1698037
Report Number(s):
DOE-SLAC-00515; DOE-Nebraska-Lincoln-14170; TRN: US2100318
Journal Information:
Structural Dynamics, Vol. 6, Issue 5; Conference: 4. Femtosecond Electron Imaging and Spectroscopy (FEIS 4), Lincoln, NE (United States), 13-15 May 2019; ISSN 2329-7778
Publisher:
American Crystallographic Association/AIPCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 17 works
Citation information provided by
Web of Science

References (58)

Linac Coherent Light Source: The first five years journal March 2016
Capturing Chemistry in Action with Electrons: Realization of Atomically Resolved Reaction Dynamics journal May 2017
Dark Structures in Molecular Radiationless Transitions Determined by Ultrafast Diffraction journal January 2005
Femtosecond time-resolved MeV electron diffraction journal June 2015
Note: Single-shot continuously time-resolved MeV ultrafast electron diffraction journal March 2010
Terahertz-based subfemtosecond metrology of relativistic electron beams journal January 2019
Direct Observation of the Transition State journal March 1995
A stroboscopical gas-electron diffraction method for the investigation of short-lived molecular species journal November 1983
Tilted femtosecond pulses for velocity matching in gas-phase ultrafast electron diffraction journal August 2014
Breaking resolution limits in ultrafast electron diffraction and microscopy journal October 2006
Instrumentation for time-resolved electron diffraction spanning the time domain from microseconds to picoseconds journal July 1998
Ultrafast electron diffraction. Velocity mismatch and temporal resolution in crossed-beam experiments journal June 1993
Transmission-electron diffraction by MeV electron pulses journal June 2011
Ultrafast Electron Diffraction. 5. Experimental Time Resolution and Applications journal March 1994
Single shot time stamping of ultrabright radio frequency compressed electron pulses journal July 2013
Hard X-ray free-electron laser with femtosecond-scale timing jitter journal October 2017
The potential and limitations of neutrons, electrons and X-rays for atomic resolution microscopy of unstained biological molecules journal May 1995
Clocking transient chemical changes by ultrafast electron diffraction journal March 1997
Femtosecond mega-electron-volt electron microdiffraction journal January 2018
Ultrafast electron diffraction: determination of radical structure with picosecond time resolution journal June 1998
Direct Imaging of Transient Molecular Structures with Ultrafast Diffraction journal January 2001
High current table-top setup for femtosecond gas electron diffraction journal July 2017
On the molecular structure of X-CF3 molecules (X = Cl, Br, I) journal March 1978
Electronic acceleration of atomic motions and disordering in bismuth journal March 2009
Imaging CF 3 I conical intersection and photodissociation dynamics with ultrafast electron diffraction journal July 2018
Solving the jitter problem in microwave compressed ultrafast electron diffraction instruments: Robust sub-50 fs cavity-laser phase stabilization journal September 2017
A compact X-ray free-electron laser emitting in the sub-ångström region journal June 2012
A photoinduced metal-like phase of monoclinic VO 2 revealed by ultrafast electron diffraction journal October 2014
The photochemical ring-opening of 1,3-cyclohexadiene imaged by ultrafast electron diffraction journal April 2019
Structural femtochemistry: experimental methodology. journal June 1991
Spatio-temporal resolution studies on a highly compact ultrafast electron diffractometer journal April 2015
Ultrafast time-resolved electron diffraction with megavolt electron beams journal October 2006
X-Ray Diffraction from Isolated and Strongly Aligned Gas-Phase Molecules with a Free-Electron Laser journal February 2014
Compact femtosecond electron diffractometer with 100 keV electron bunches approaching the single-electron pulse duration limit journal January 2015
Imaging of alignment and structural changes of carbon disulfide molecules using ultrafast electron diffraction journal September 2015
Experimental demonstration of high quality MeV ultrafast electron diffraction journal August 2009
Electron and X-Ray Methods of Ultrafast Structural Dynamics: Advances and Applications journal January 2009
I. Hargittai, M. Hargittai (Eds.): The Electron Diffraction Technique, Part A von: Stereochemical Applications of Gas-Phase Electron Diffraction, VCH Verlagsgesellschaft, Weinheim, Basel. Cambridge, New York 1988. 206 Seiten, Preis: DM 210,-. journal October 1989
Mega-electron-volt ultrafast electron diffraction at SLAC National Accelerator Laboratory journal July 2015
Relativistic electron diffraction at the UCLA Pegasus photoinjector laboratory journal October 2008
Mapping atomic motions with ultrabright electrons: towards fundamental limits in space-time resolution journal January 2015
High quality single shot ultrafast MeV electron diffraction from a photocathode radio-frequency gun journal August 2014
Diffractive imaging of a rotational wavepacket in nitrogen molecules with femtosecond megaelectronvolt electron pulses journal April 2016
�ber Elektronenbeugung am einzelnen Molek�l journal February 1930
A direct electron detector for time-resolved MeV electron microscopy journal March 2017
Compression of Subrelativistic Space-Charge-Dominated Electron Bunches for Single-Shot Femtosecond Electron Diffraction journal December 2010
Diffractive Imaging of Coherent Nuclear Motion in Isolated Molecules journal October 2016
Capturing ultrafast structural evolutions with a single pulse of MeV electrons: Radio frequency streak camera based electron diffraction journal December 2010
Femtosecond Crystallography with Ultrabright Electrons and X-rays: Capturing Chemistry in Action journal March 2014
X-Ray Diffraction from Isolated and Strongly Aligned Gas-Phase Molecules with a Free-Electron Laser text January 2014
Compression of sub-relativistic space-charge-dominated electron bunches for single-shot femtosecond electron diffraction text January 2010
Compact femtosecond electron diffractometer with 100 keV electron bunches approaching the single-electron pulse duration limit text January 2014
Femtosecond mega-electron-volt electron microdiffraction preprint January 2017
Solving the Jitter Problem in Microwave Compressed Ultrafast Electron Diffraction Instruments: Robust Sub-50 fs Cavity-Laser Phase Stabilization text January 2017
Femtosecond gas phase electron diffraction with MeV electrons journal January 2016
Imaging of Isolated Molecules with Ultrafast Electron Pulses journal September 2012
Imaging Molecular Motion: Femtosecond X-Ray Scattering of an Electrocyclic Chemical Reaction journal June 2015
Diffractive Imaging of Coherent Nuclear Motion in Isolated Molecules text January 2016

Similar Records

Liquid-phase mega-electron-volt ultrafast electron diffraction
Journal Article · Mon Mar 09 00:00:00 EDT 2020 · Structural Dynamics · OSTI ID:1572204

Mega-electron-volt ultrafast electron diffraction at SLAC National Accelerator Laboratory
Journal Article · Wed Jul 15 00:00:00 EDT 2015 · Review of Scientific Instruments · OSTI ID:1572204

Mega-electron-volt ultrafast electron diffraction at SLAC National Accelerator Laboratory
Journal Article · Wed Jul 01 00:00:00 EDT 2015 · Review of Scientific Instruments · OSTI ID:1572204