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Design and construction of a compact, high-repetition-rate ultrafast electron diffraction instrument

Journal Article · · Review of Scientific Instruments
DOI:https://doi.org/10.1063/5.0094278· OSTI ID:2424892
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [7]
  1. Massachusetts Institute of Technology, Cambridge, MA (United States); University of Houston, TX (United States)
  2. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
  3. Massachusetts Institute of Technology, Cambridge, MA (United States); University of California, Berkeley, CA (United States)
  4. Massachusetts Institute of Technology, Cambridge, MA (United States); University of California, Los Angeles, CA (United States)
  5. Massachusetts Institute of Technology, Cambridge, MA (United States); Harvard University, Cambridge, MA (United States)
  6. Massachusetts Institute of Technology, Cambridge, MA (United States); Nanyang Technological University (Singapore)
  7. Massachusetts Institute of Technology, Cambridge, MA (United States)

We present the design and performance of a compact ultrafast electron diffraction instrument. The diffractometer provides a means of examining time-resolved ultrafast dynamical properties of solids. The system’s utilization is discussed in terms of instrument parameters and diffraction data from selected condensed matter samples. Here, the difractometer’s performance is highlighted in terms of detection sensitivity, instrumental temporal resolution, and the electron beam transverse coherence length. Following specific details of the construction, we present a practical discussion of parameters such as repetition rate and provide advice on general construction approaches for laboratory-based, keV ultrafast electron diffractometers. In addition, design guidance for constructing a compact electron gun source that is well-suited for studying diffraction from hard condensed matter is given. A unique data acquisition scheme, utilizing high laser repetition rates, is presented.

Research Organization:
US Department of Energy (USDOE), Washington, DC (United States). Office of Science, Basic Energy Sciences (BES)
Sponsoring Organization:
USDOE; Gordon and Betty Moore Foundation’s EPiQS Initiative; Welch Foundation
OSTI ID:
2424892
Journal Information:
Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 5 Vol. 94; ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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