| Paper |
Title |
Page |
| TUBAU05 |
A 0.1 nm SASE FEL at Pohang Accelerator Laboratory
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218 |
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- M. Yoon
POSTECH, Pohang, Kyungbuk
- I. M. Hwang
CHEP, Daegu
- W. H. Hwang, D. E. Kim, S. J. Park
PAL, Pohang, Kyungbuk
- E.-S. Kim
Kyungpook National University, Daegu
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Since January 2008, design study of a free-electron laser has been in progress at Pohang Accelerator Laboratory (PAL) aiming at producing hard X-ray of 0.1 nm wavelength. Electron energy of 10 GeV has been chosen to fit the facility inside the existing PAL site. In-vacuum undulators of 120 meter long (including breaks) with 5.3 mm gap combined with a 800 meter-long conventional S-band rf linac are expected to generate intense x-ray pulses of 5 GW peak power at the saturation length of 100 m. The start-to-end simulation results support initial design parameters based on the theory. Effect of undulator wakefields are examined and 30%reduction in power is anticipated.
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| TUPPH017 |
In Vacuum Undulator System for PAL-FEL
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271 |
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- D. E. Kim, H. S. Han, C. K. Kim, H.-G. Lee, S. H. Nam, C. D. Park, K.-H. Park, H. S. Suh, Y. G. Young-Gyu
PAL, Pohang, Kyungbuk
- M. Yoon
POSTECH, Pohang, Kyungbuk
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Pohang Accelerator Laboratory (PAL) is planning to develop a 0.1 nm SASE based FEL as a next generation light source. It will be based on the 10 GeV S-band linac with In Vacuum Undulator system. The proposed in vacuum undulator has 22.3 mm magnetic period with 5.0 mm vertical clearance aperture. The magnetic length will be 4014 mm with breaks between undulators for diagnostic and focusing elements. The mechanical and magnetic requirements of the IVUN system are very challenging. In this report, the design issues related to the development of the IVUN with preliminary magnetic design will be presented.
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| TUPPH084 |
Field Mapping System for KIRAMS-30 Cyclotron Magnet
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442 |
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- K.-H. Park, D. E. Kim, Y. G. Young-Gyu, Y. D. Yun
PAL, Pohang, Kyungbuk
- J.-S. Chai, J. Kang
KIRAMS, Seoul
- B.-K. Kang
POSTECH, Pohang, Kyungbuk
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This paper presents a Hall probe mapping system for measuring a cyclotron magnet, which has been fabricated for the 30 MeV cyclotron at the Korea Institute of Radiological and Medical Sciences. The Hall probes are mounted on a precision mechanical stage and map magnetic field in the Cylindrical coordinate system. The mapping system uses the “flying” mode field mapping method to reduce data-acquisition time. The time required for mapping the whole gap-area of the cyclotron magnet is ~70 minutes. The relative random fluctuation error during the entire mapping process is less than ±0.02%. The cyclotron magnet has been corrected using field measurement data, and the achieved total phase excursion of the cyclotron after correction is less than ±15°, which is within the tolerance of ±20° for the total phase excursion.
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| TUPPH085 |
Digital Power Supply for Air Core Magnet
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445 |
| |
- S.-H. Jeong, J. Choi, D. E. Kim, K.-H. Park
PAL, Pohang, Kyungbuk
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This paper presents the air core magnet power supply for the Pohang Light Source. The required current to energize the air core magnet was ±5 A with the high precision of ~2ppm resolution to accomplish a stable beam orbit correction. This power supply has been implemented using the digital signal processing technology and shows the high stability and other good responses. Various experimental results such as stability, bandwidth and simulation are given in this paper.
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