Physics Requirements of PAL-XFEL Undulator

Journal Article · Fri Jan 19 00:00:00 EST 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2436093· OSTI ID:21052548

Kim, D E; Park, K H; Oh, J S; Chung, C W ^[1]; Ko, I S ^[1]

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1. Pohang Accelerator Laboratory, POSTECH, San 31 Hyojadong, Namgu, 790-390 Pohang (Korea, Republic of)

Pohang Accelerator Laboratory(PAL) is planning a 0.3 nm SASE (Self Amplification of Spontaneous Emission) XFEL based on 3.7 GeV linear accelerator. For short saturation length, application of SPring8 type in vacuum undulator is needed. This reflects the experiences from SPring8 SCSS project. The end structures were designed to be asymmetric along the beam direction to ensure systematic zero 1st field integral. The thickness of the last magnets were adjusted to minimize the transition distance to the fully developed periodic field. This approach is more convenient to control than adjusting the strength of the end magnets. The final design features 4 mm minimum pole gap, 15 mm period, peak effective field of 1.09 Tesla. In this article, the physical design of the undulator, the design of the end structure, and the physics requirements of the undulator system will be presented.

• OSTI ID: 21052548
• Journal Information: AIP Conference Proceedings, Vol. 879, Issue 1; Conference: 9. international conference on synchrotron radiation instrumentation, Daegu (Korea, Republic of), 28 May - 2 Jun 2006; Other Information: DOI: 10.1063/1.2436093; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
AMPLIFICATION
ASYMMETRY
DESIGN
FREE ELECTRON LASERS
GEV RANGE
LINEAR ACCELERATORS
MAGNETIC FIELDS
PERIODICITY
POHANG LIGHT SOURCE
WIGGLER MAGNETS