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Title: Overview of PAL-XFEL

Abstract

PAL-XFEL is the 4-th generation light source based on Self Amplified Spontaneous Emission (SASE) that Pohang Accelerator Laboratory is going to build. For the purpose, the linear accelerator, which is used for the injection to the PLS storage ring, will be upgraded and expanded to 3.7 GeV. In this paper, the overview of PAL-XFEL will be introduced including the physics design.

Authors:
; ; ; ; ; ; ; ; ; ;  [1]
  1. Pohang Accelerator Laboratory, Pohang, Kyungbuk, 790-784 (Korea, Republic of)
Publication Date:
OSTI Identifier:
21043423
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 879; Journal Issue: 1; Conference: 9. international conference on synchrotron radiation instrumentation, Daegu (Korea, Republic of), 28 May - 2 Jun 2006; Other Information: DOI: 10.1063/1.2436049; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; BEAM INJECTION; DESIGN; FREE ELECTRON LASERS; GEV RANGE; LASER RADIATION; LINEAR ACCELERATORS; PHOTON EMISSION; POHANG LIGHT SOURCE; STORAGE RINGS

Citation Formats

Lee, T.-Y., Bae, Y. S., Choi, J., Huang, J. Y., Kang, H. S., Kim, M. G., Kuk, D. H., Oh, J. S., Parc, Y. W., Park, J. H., and Ko, I. S. Overview of PAL-XFEL. United States: N. p., 2007. Web. doi:10.1063/1.2436049.
Lee, T.-Y., Bae, Y. S., Choi, J., Huang, J. Y., Kang, H. S., Kim, M. G., Kuk, D. H., Oh, J. S., Parc, Y. W., Park, J. H., & Ko, I. S. Overview of PAL-XFEL. United States. doi:10.1063/1.2436049.
Lee, T.-Y., Bae, Y. S., Choi, J., Huang, J. Y., Kang, H. S., Kim, M. G., Kuk, D. H., Oh, J. S., Parc, Y. W., Park, J. H., and Ko, I. S. Fri . "Overview of PAL-XFEL". United States. doi:10.1063/1.2436049.
@article{osti_21043423,
title = {Overview of PAL-XFEL},
author = {Lee, T.-Y. and Bae, Y. S. and Choi, J. and Huang, J. Y. and Kang, H. S. and Kim, M. G. and Kuk, D. H. and Oh, J. S. and Parc, Y. W. and Park, J. H. and Ko, I. S.},
abstractNote = {PAL-XFEL is the 4-th generation light source based on Self Amplified Spontaneous Emission (SASE) that Pohang Accelerator Laboratory is going to build. For the purpose, the linear accelerator, which is used for the injection to the PLS storage ring, will be upgraded and expanded to 3.7 GeV. In this paper, the overview of PAL-XFEL will be introduced including the physics design.},
doi = {10.1063/1.2436049},
journal = {AIP Conference Proceedings},
number = 1,
volume = 879,
place = {United States},
year = {Fri Jan 19 00:00:00 EST 2007},
month = {Fri Jan 19 00:00:00 EST 2007}
}
  • The PAL (Pohang Accelerator Laboratory) 2.5-GeV linac is planed to be converted to a SASE-XFEL facility (PAL XFEL) that supplies coherent X-rays down to 0.3-nm wavelength. The electron beams has to have an emittance of 1.0 mm-mrad, a peak current of 3 kA, and a low energy spread of 1.0 MeV. In order to provide reasonably stable SASE output, the RF stability of 0.02% rms is required for both RF phase and amplitude. This stability is mainly determined by a low level RF drive system and klystron-modulators. The stability level of the modulator has to be improved 10 times bettermore » to meet the pulse stability of 0.02%. This is a technologically challenging issue for PAL XFEL. An inverter technology is to be applied to charge the PFN of a new modulator. Therefore, a new inverter system should provide very stable charging performances. This paper presents the development of an ultra stable klystron-modulator with an inverter power.« less
  • 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 4more » 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.« less
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