| Paper |
Title |
Page |
| TUPMN070 |
Magnet Block Arrangements for the Apple-II Elliptically Polarized Undulator
|
1079 |
| |
- C.-S. Hwang, C.-H. Chang, M.-H. Huang, P. H. Lin
NSRRC, Hsinchu
|
|
| |
The good field region (magnetic field roll-off) of the horizontal and vertical field distribution in the elliptically polarized undulator (EPU) of the APPLE II structure is too short. Meanwhile, the strong force variation will be created between the magnet arrays on different phase. Hence, a magnet block was magnetized with an tilt angle has been studied to enlarge the good field region and a different arrangement of magnet block module is used to reduce the force variation. In addition, the pure and hybrid structure of the EPU with different end pole design has been studied. This study will obtain a small variation of the first and second field integral on different gap and phase. This work will report the scheme of the magnet block arrangement and the end pole design for the APPLE II elliptically polarized undulator.
|
|