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Reducing the group velocity of coherent radiation for upconverting the single-cycle electron density modulation.
- Source :
-
Applied Physics Letters . 2/8/2016, Vol. 108 Issue 6, p1-5. 5p. 1 Color Photograph, 5 Graphs. - Publication Year :
- 2016
-
Abstract
- We present an interesting property of broadband coherent radiation emitted by a single microbunch, or a single-cycle density modulation in an electron beam passing through an undulator, and describe its application to a frequency upconversion of the single-cycle modulation. This is based on the fact that a monocycle pulse is generated by focusing the coherent radiation with a unit-magnification optical system, which propagates without diffraction like the Bessel beam, at a reduced group velocity equal to the average electron velocity in the undulator. Calculations show that a single microbunch with a length of 46-nm formed in a 2-GeV and 2-kA electron beam can be upconverted to a 4-nm long microbunch through interaction with focused coherent radiation. [ABSTRACT FROM AUTHOR]
- Subjects :
- *COHERENT radiation
*ELECTRON beams
*ELECTRON density
*OPTICAL devices
*BESSEL beams
Subjects
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 108
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 113011554
- Full Text :
- https://doi.org/10.1063/1.4941811