Author/Authors :
Nakao، نويسنده , , N and Kokubo، نويسنده , , M and Imasaki، نويسنده , , K and Fujita، نويسنده , , M and Ohkubo، نويسنده , , K and Moon، نويسنده , , A and Roy، نويسنده , , P.K. and Tanaka، نويسنده , , H and Ohigashi، نويسنده , , N and Tsunawaki، نويسنده , , Y and Mima، نويسنده , , K and Nakai، نويسنده , , S and Yamanaka، نويسنده , , C، نويسنده ,
Abstract :
To enhance the FEL harmonic gain, we have developed a wiggler having a harmonic wiggler field. The modified wiggler consists of a conventional planar wiggler and high-permeability shims. Because of this simpleness, we can develop a wiggler having various types of modified fields, easily and economically. We show the design basis of the modified wiggler and examples of them which contain one harmonic field. Then, we introduce the FEL experiment of the 5th harmonic generation with a modified wiggler.
