Coherent light generators – Free electron laser
Patent
1994-07-12
1996-03-12
Scott, Jr., Leon
Coherent light generators
Free electron laser
372 37, H01S 300
Patent
active
054992559
ABSTRACT:
An electromagnetic wiggler having a cylindrical member, and a central member disposed axially within the cylindrical member, both of which are formed from alternating cylindrical sections of ferromagnetic and non-ferromagnetic material, each sequential pair of these sections being the length of the wiggler's period .lambda..sub.w. The sequence of sections between the inner and outer members is shifted .lambda..sub.w /2, so that ferromagnetic sections of the outer member are disposed radially opposite non-ferromagnetic sections of the inner member, and vice versa. The resultant radial magnetic flux density in the cylindrical gap between the members is larger and sharper than the flux density for the same wiggler without the central member, permitting higher radiated power output, at higher radiation frequencies, for the same energy of input electron beam.
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patent: 4876687 (1989-10-01), Feinstein
patent: 5068860 (1991-11-01), Hartemann et al.
patent: 5095486 (1992-03-01), Etievant
patent: 5115439 (1992-05-01), Howard
patent: 5144193 (1992-09-01), Warren
R. H. Jackson et al., Coaxial Hybrid Iron (CHI) Wiggler, SPIE vol. 2013, p. 62 (reporting papers presented at a conference Jul. 13-14, 1993).
Freund Henry P.
Jackson Robert H.
Pershing Dean E.
Taccetti Jose M.
Jr. Leon Scott
McDonnell Thomas E.
Miles Edward F.
The United States of America as represented by the Secretary of
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