HYBRID PLANAR WIGGLER WITH A PERIOD OF 2 CM FOR HIGHER HARMONIC FEL LASING

Authors
TSUNAWAKI Y NOGUCHI M KUSABA M OHIGASHI N FUJITA M KURUMA S MIMA K NAKAI S YAMANAKA C
Citation
Y. Tsunawaki et al., HYBRID PLANAR WIGGLER WITH A PERIOD OF 2 CM FOR HIGHER HARMONIC FEL LASING, International journal of infrared and millimeter waves, 19(2), 1998, pp. 177-184
Citations number
6
Categorie Soggetti
Engineering, Eletrical & Electronic","Physics, Applied",Optics
Journal title
International journal of infrared and millimeter waves → ACNP
ISSN journal
01959271
Volume
19
Issue
2
Year of publication
1998
Pages
177 - 184
Database
ISI
SICI code
0195-9271(1998)19:2<177:HPWWAP>2.0.ZU;2-M
Abstract
A hybrid planar wiggler with a period of 20 mm has been studied as the simplest one which gives the strong field including some higher harmo nic components by selecting proper sizes of the ferromagnetic and the permanent magnet. Small gap length of the wiggler and small width of p ermendur satisfy these conditions to a certain degree. Gain analysis o f FEL suggests that for high wiggler field of K>1 similar to 1.6, high er harmonic gains are improved primarily due to its strong field, and for low wiggler field of K<1 similar to 1.6, they are mainly due to th e modification of the wiggler field distribution.