IPAC2017 - List of Authors (Hwang, W.H.)

Paper	Title	Page
THPVA059	Development of a New High Power RF Window for S-band Linac	4576
	W.H. Hwang, J.Y. Choi, Y.D. Joo, S.H. Kim, B.-J. Lee PAL, Pohang, Kyungbuk, Republic of Korea S.J. Roh Vitzrotech Co., Ltd., Ansan City, Kyunggi-Do, Republic of Korea
	A prototype rf window was developed in collaboration with Pohang Accelerator Laboratory (PAL) and domestic companies. The PAL designed the S-band TE012 rf window and conducted the high power performance tests of single rf window to verify the operation characteristics for the application to the PLSII Linac. The test was performed in the in-situ facility consisting of a modulator, klystron, waveguide network, vacuum system, cooling system, and rf analyzing equipment. As the test results with SLED, no breakdown appeared up to 75 MW peak power with 4.5 micro-seconds rf pulse width at a repetition rate of 10 Hz. The test results with the current operation level of PLSII Linac confirms that the rf window well satisfies the criteria of PLS Linac operation.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPVA059
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THPVA114	Status of High-Efficiency Klystron Development for the PLS-II and PAL-XFEL	4726
	S.J. Park, H.S. Han, W.H. Hwang, S.D. Jang, Y.D. Joo, K.R. Kim, C.D. Park, Y.J. Park PAL, Pohang, Kyungbuk, Republic of Korea J.H. Hwang, S.S. Jang POSTECH, Pohang, Kyungbuk, Republic of Korea S.Y. Hyun, H.S. Seo, D.H. Yu Vitzrotech Co., Ltd., Ansan City, Kyunggi-Do, Republic of Korea
	Funding: This work was supported by the National R&D program (grant number: 2016R1A6B2A01016828) through the National Research Foundation of Korea (NRF). We are developing a high-efficiency klystron for use in the PLS-II(Pohang Light Source II) and the PAL-XFEL in the Pohang Accelerator Laboratory. Since the PLS-II and the PAL-XFEL are already running with ~70 klystron modulator systems, newly developed klystrons should be designed to fit into existing installation spaces and power supplies, and their overall lengths(< 2 m) and beam perveances(2 upervs) should not be changed. In order to achieve the high efficiency with aforementioned boundary conditions, we are going to adopt a multi-cell output cavity in which, unlike those of the the SLAC X-band and KEK C-band klystrons, the cell frequencies are independently tuned to provide maximum beam-to-rf power conversion. In this article we report on our physics and engineering design efforts to achieve the high efficiency with minimum instabilities.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPVA114
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Development of a New High Power RF Window for S-band Linac

4576

W.H. Hwang, J.Y. Choi, Y.D. Joo, S.H. Kim, B.-J. Lee
PAL, Pohang, Kyungbuk, Republic of Korea
S.J. Roh
Vitzrotech Co., Ltd., Ansan City, Kyunggi-Do, Republic of Korea

A prototype rf window was developed in collaboration with Pohang Accelerator Laboratory (PAL) and domestic companies. The PAL designed the S-band TE012 rf window and conducted the high power performance tests of single rf window to verify the operation characteristics for the application to the PLSII Linac. The test was performed in the in-situ facility consisting of a modulator, klystron, waveguide network, vacuum system, cooling system, and rf analyzing equipment. As the test results with SLED, no breakdown appeared up to 75 MW peak power with 4.5 micro-seconds rf pulse width at a repetition rate of 10 Hz. The test results with the current operation level of PLSII Linac confirms that the rf window well satisfies the criteria of PLS Linac operation.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPVA059

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPVA114

Status of High-Efficiency Klystron Development for the PLS-II and PAL-XFEL

4726

S.J. Park, H.S. Han, W.H. Hwang, S.D. Jang, Y.D. Joo, K.R. Kim, C.D. Park, Y.J. Park
PAL, Pohang, Kyungbuk, Republic of Korea
J.H. Hwang, S.S. Jang
POSTECH, Pohang, Kyungbuk, Republic of Korea
S.Y. Hyun, H.S. Seo, D.H. Yu
Vitzrotech Co., Ltd., Ansan City, Kyunggi-Do, Republic of Korea

Funding: This work was supported by the National R&D program (grant number: 2016R1A6B2A01016828) through the National Research Foundation of Korea (NRF).
We are developing a high-efficiency klystron for use in the PLS-II(Pohang Light Source II) and the PAL-XFEL in the Pohang Accelerator Laboratory. Since the PLS-II and the PAL-XFEL are already running with ~70 klystron modulator systems, newly developed klystrons should be designed to fit into existing installation spaces and power supplies, and their overall lengths(< 2 m) and beam perveances(2 upervs) should not be changed. In order to achieve the high efficiency with aforementioned boundary conditions, we are going to adopt a multi-cell output cavity in which, unlike those of the the SLAC X-band and KEK C-band klystrons, the cell frequencies are independently tuned to provide maximum beam-to-rf power conversion. In this article we report on our physics and engineering design efforts to achieve the high efficiency with minimum instabilities.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPVA114

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)