Generation and Measurement of Relativistic Electron Bunches Characterized by a Linearly Ramped Current Profile
- Department of Physics and Astronomy, University of California Los Angeles, 405 Hilgard, Los Angeles, California 90095 (United States)
We report the first successful attempt to generate ultrashort (1-10 ps) relativistic electron bunches characterized by a ramped longitudinal current profile that rises linearly from head to tail and then falls sharply to zero. Bunches with this type of longitudinal shape may be applied to plasma-based accelerator schemes as an optimized drive beam, and to free-electron lasers as a means of reducing asymmetry in microbunching due to slippage. The scheme used to generate the ramped bunches employs an anisochronous dogleg beam line with nonlinear correction elements to compress a beam having an initial positive time-energy chirp. The beam current profile is measured using a deflecting mode cavity, and a pseudoreconstruction of the beam's longitudinal phase space distribution is obtained by using this diagnostic with a residual horizontal dispersion after the dogleg.
- OSTI ID:
- 21132466
- Journal Information:
- Physical Review Letters, Vol. 100, Issue 21; Other Information: DOI: 10.1103/PhysRevLett.100.214802; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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