標題: Performances and characteristics of a prototype symmetric hybrid adjustable phase undulator
作者: Hwang, CS
Chang, CH
Fan, TC
Lin, FY
Wang, C
Yeh, ST
Chang, HP
Hsu, KT
Chang, LH
Tseng, PK
Uen, TM
電子物理學系
Department of Electrophysics
公開日期: 11-十一月-1997
摘要: In this work, we construct and measure a prototype symmetric Hybrid Adjustable Phase Undulator (HAPU) with nine poles to compare phase change and gap change in terms of their features and performances. HAPU can also provide the different characteristics between the pure and hybrid adjustable phase undulator. The HAPU has been installed in the Synchrotron Radiation Research Center (SRRC) storage ring to test the performance of the beam dynamics and photon flux behavior. A three-orthogonal Hall probe and a long-loop-coil measurement system are also implemented to take the field measurements. The multipole field and electron trajectory correction are made by shimming, the magic finger, and the active end pole coil corrector. After the field measurements, the vertical integral strength of HAPU is markedly smaller than that of the Hybrid Adjustable Gap Undulator (HAGU) and confirm that no obvious distinction arises between HAPU and HAGU in terms of the spectrum flux. The electron beam dynamic performance in the storage ring indicates that the vertical tune shift of HAPU is three times smaller than that of HAGU. Meanwhile, the energy dynamic tuning with the digital global feedback turned on, the photon position and flux in the bending chamber beam line is invariant. In addition, the injection efficiency remains unaffected at any phase position and the electron beam lifetime does not change when HAPU is in the dynamic tuning.
URI: http://dx.doi.org/10.1016/S0168-9002(97)00966-2
http://hdl.handle.net/11536/191
ISSN: 0168-9002
DOI: 10.1016/S0168-9002(97)00966-2
期刊: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
Volume: 399
Issue: 2-3
起始頁: 463
結束頁: 476
顯示於類別:期刊論文


文件中的檔案:

  1. A1997YF19500028.pdf