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Title: Optical circular deflector with attosecond resolution for ultrashort electron beam

A novel method using high-power laser as a circular deflector is proposed for the measurement of femtosecond (fs) and sub-fs electron beam. In the scheme, the electron beam interacts with a laser pulse operating in a radially polarized doughnut mode ( TEM 01 * ) in a helical undulator, generating angular kicks along the beam in two directions at the same time. The phase difference between the two angular kicks makes the beam form a ring after a propagation section with appropriate phase advance, which can reveal the current profile of the electron beam. Detailed theoretical analysis of the method and numerical results with reasonable parameters are both presented. Lastly, it is shown that the temporal resolution can reach up to ~ 100 attosecond, which is a significant improvement for the diagnostics of ultrashort electron beam.
 [1] ;  [1] ;  [1] ;  [2] ;  [2]
  1. Tsinghua Univ., Beijing (China). Dept. of Engineering Physics
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States)
Publication Date:
Report Number(s):
Journal ID: ISSN 2469-9888; PRABCJ; TRN: US1702659
Grant/Contract Number:
11375097; 11435015; AC02-76SF00515
Published Article
Journal Name:
Physical Review Accelerators and Beams
Additional Journal Information:
Journal Volume: 20; Journal Issue: 5; Journal ID: ISSN 2469-9888
American Physical Society (APS)
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE; National Natural Science Foundation of China (NNSFC)
Country of Publication:
United States
43 PARTICLE ACCELERATORS; Beam diagnostics; free-electron lasers (FELs)
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1369429