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Title: Non-invasive low charge electron beam time-of-arrival diagnostic using a plasmonics-enhanced photoconductive antenna

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.5052631· OSTI ID:1490453
ORCiD logo [1]; ORCiD logo [2];  [3];  [2];  [1];  [4]
  1. Univ. of California, Los Angeles, CA (United States). Dept. of Physics and Astronomy
  2. Univ. of California, Los Angeles, CA (United States). Dept. of Electrical and Computer Engineering
  3. RadiaBeam Technologies, Santa Monica, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  4. RadiaBeam Technologies, Santa Monica, CA (United States)

The use of a plasmonics-enhanced photoconductive antenna (PCA) optically gated by a near infrared (NIR) pulse enables non-invasive time-of-arrival measurements of a low charge electron beam with respect to the NIR reference, achieving picosecond resolution. The measured signal values show the expected scaling with the beam charge and distance from PCA to the beam axis, as the PCA samples the electric field of the passing electron beam. We operate the device with an NIR spot size much larger than the PCA active-area, resulting in a very simple optical setup and alignment procedure, making the plasmonics-enhanced PCA a preferred alternative to more complex timing diagnostics for applications requiring non-invasive picosecond or sub-picosecond timestamping.

Research Organization:
SLAC National Accelerator Lab., Menlo Park, CA (United States); Univ. of California, Los Angeles, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF)
Grant/Contract Number:
AC02-76SF00515; SC0009914; PHY-1734215
OSTI ID:
1490453
Journal Information:
Applied Physics Letters, Vol. 113, Issue 19; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 1 work
Citation information provided by
Web of Science

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Figures / Tables (6)