Knot Undulator to Generate Linearly Polarized Photons with Low on-Axis Power Density

Qiao, S. ; /Stanford U., Appl. Phys. Dept. /SLAC, SSRL /LBNL, ALS /Fudan U. ; Ma, De-wei ; Feng, Dong-lai ; /Fudan U. ; Hussain, Z. ; /LBNL, ALS ; Shen, Z.-X. ; /Stanford U., Appl. Phys. Dept. /SLAC, SSRL

关键词: OPTICS;    PERMANENT MAGNETS;    PHOTONS;    POWER DENSITY;    SYNCHROTRON RADIATION;    WIGGLER MAGNETS General Physics;    OTHER;   

DOI  :  10.2172/957413
RP-ID  :  SLAC-PUB-13687
PID  :  OSTI ID: 957413
Others  :  Other: arXiv:0802.0237
Others  :  TRN: US1000443

学科分类：核物理和高能物理

美国|英语

来源: SciTech Connect

【 摘 要 】

Heat load on beamline optics is a serious problem to generate pure linearly polarized photons in the third generation synchrotron radiation facilities. For permanent magnet undulators, this problem can be overcome by a figure-8 operating mode. But there is still no good method to tackle this problem for electromagnetic elliptical undulators. Here, a novel operating mode is suggested, which can generate pure linearly polarized photons with very low on-axis heat load. Also the available minimum photon energy of linearly polarized photons can be extended much by this method.