Park, S. J.

Paper	Title	Page
WEC3H102	Fabrication and Performance Test of the Cavity BPM for KEK ATF2 and PAL XFEL	336
	J. Y. Huang, W. H. Hwang, S. H. Kim, S. J. Park, Y. J. Park PAL, Pohang, Kyungbuk Y. Honda, I. Y. Inoue, T. Tauchi, J. Urakawa KEK, Ibaraki M. C. Ross Fermilab, Batavia, Illinois
	Precise, single shot measurement of the beam position with a sub-micrometer resolution is required for the next generation linear accelerators such as International Linear Collider (ILC) and X-ray Free Electron Laser (XFEL). As a pill-box cavity structure is sensitive to the transverse offset of the beam at the dipole-mode resonance, e.g., TM110-mode, a pill-box type cavity is a good candidate for the sub-micrometer beam position monitor (BPM). Test cavity BPM had been designed and tested in KEK successfully, and miscellaneous improvements for the final prototype fabrication and beam tests are performed in collaboration between KEK, SLAC and PAL. With the successful results of beam test in ATF, 41 cavity BPMs will be produced by PAL and installed in ATF2, which is an advanced beam-test line under construction as the extension of existing ATF for the beam studies on the final focus of the planned ILC program. Technical design considerations, fabrication and test results are described in this paper.
	Slides
WEPMA083	Design of C-band Standing-wave Accelerating Structure	440
	S. H. Kim, M.-H. Cho, W. Namkung, B. Park, H. R. Yang POSTECH, Pohang, Kyungbuk S. D. Jang, J.-S. Oh, S. J. Park, Y. G. Son PAL, Pohang, Kyungbuk
	We design a C-band standing-wave accelerating structure for a compact electron linac. It is capable to produce electron beams with the beam energy of 4 MeV and the pulsed beam current of 50 mA. It is to be operated in the π/2 mode with the on-axis coupled structure. The beamline is composed of the E-gun and the accelerating column with 3 and half bunching cells and 9 and half normal cells. We design standing-wave RF cavities using the OMEGA3P code to implement the asymmetric magnetic coupling slots. For the beam dynamics study, we use the PARMELA code with the SUPERFISH fields configuration. Without the pre-buncher cavity and the focusing magnets, the lost beam power to the wall is 10 kW for the output beam power of 200 kW, while the transmission is 58%.
THPMA127	Development of L-band Electron Accelerator for Irradiation Source	821
	S. H. Kim, M.-H. Cho, S.-I. Moon, W. Namkung, B. Park, H. R. Yang POSTECH, Pohang, Kyungbuk S. D. Jang, J.-S. Oh, S. J. Park, Y. G. Son PAL, Pohang, Kyungbuk
	An intense L-band electron accelerator is under development for irradiation applications. It is capable of producing 10-MeV electron beams of 30 kW with the fully beam-loaded condition. The accelerator is powered by a pulsed klystron of 1.3 GHz and 25 MW with the 60-kW average power. The accelerating column, a traveling-wave structure, is operated with the 2π/3 mode and is installed vertically with other beam-line components. With the beam dynamics simulation, the beam transmission efficiency is over 90% and the beam size is enough to clear the apertures. Design details and the status of installation are presented for the L-band electron accelerator.