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

被引：4
|
作者：
Freelon, Byron [1 ,2 ,3 ]
Rohwer, Timm [4 ]
Zong, Alfred [1 ,5 ]
Kogar, Anshul [1 ,6 ]
Zhou, Hengyun [1 ,7 ]
Wong, Liang Jie [1 ,8 ]
Ergecen, Emre [1 ]
Gedik, Nuh [1 ]
机构：
[1] MIT, Dept Phys, 77 Massachusetts Ave, Cambridge, MA 02139 USA
[2] Univ Houston, Phys Dept, Houston, TX 77004 USA
[3] Univ Houston, Texas Ctr Superconduct, Houston, TX 77004 USA
[4] Ctr Free Electron Laser Sci Deutsch Electronen Sy, D-22361 Hamburg, Germany
[5] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA
[6] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA
[7] Harvard Univ, Dept Phys, Cambridge, MA 02139 USA
[8] Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 639798, Singapore
来源：
REVIEW OF SCIENTIFIC INSTRUMENTS | 2023年 / 94卷 / 05期
关键词：
SINGLE-CRYSTAL;
D O I：
10.1063/5.0094278
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
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. 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.
引用
收藏
页数：11
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