Physics design for the ATA tapered wiggler 10. 6. mu. FEL amplifier experiment
We are presently designing and constructing a high-gain, tapered wiggler 10.6 ..mu.. FEL amplifier to operate with the 50 MeV ATA e-beam. The initial experiments will be done with a constant period (lambda /SUB w/ =8 cm), 5 m-long linear wiggler. For an input laser power of 800 MW and electron beam brightness of 2.10/sup 5/ A/(rad-cm)/sup 2/, we hope to achieve a trapped particle fraction about0.5 and an energy extraction efficiency of about2% with a about10% taper in the wiggler magnetic field. This taper corresponds to decelerating the trapped particle approximately two full ponderomotive well (i.e. bucket) heights. In this talk, we discuss the physics motivations behind our tapered wiggler design and initial experimental diagnostics.
- Research Organization:
- Lawrence Livermore National Laboratory, Livermore, CA
- OSTI ID:
- 5950253
- Report Number(s):
- CONF-850504-
- Journal Information:
- IEEE Trans. Nucl. Sci.; (United States), Journal Name: IEEE Trans. Nucl. Sci.; (United States) Vol. NS-32:5; ISSN IETNA
- Country of Publication:
- United States
- Language:
- English
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Tapering FEL amplifiers in wiggler period and field
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