IPAC2016 - List of Authors (Kim, K.W.)

Paper	Title	Page
WEPMR053	Technical Overview of Cavity BPM Mover for PAL XFEL	2395
	H.-G. Lee, S.-H. Jeong, Y.-G. Jung, H.-S. Kang, D.E. Kim, K.W. Kim, S.B. Lee, D.H. Na, B.G. Oh, K.-H. Park, H.S. Suh, Y.J. Suh PAL, Pohang, Republic of Korea
	Pohang Accelerator Laboratory(PAL) has been developing a SASE X-ray Free Electron Laser based on 10 GeV linear accelerator. The cavity BPM mover was developed to be used in the intersections of the Undulator Systems. The main specifications include submicron repeatability for a 50 kg cavity BPM adjusting system within compact dimensions and a ±1.5 mm stroke in the vertical and horizontal direction. Compact linear motion guide based on 5-phase stepping motors have been chosen. A closed-loop control system has been developed to achieve this repeatability. For the feedback, one digital probe sensor for each axis was used. Mechanical switches are used to limit movement. In addition, hard-stops are included for emergency. In this report, we describe the design of the stages used for precise movement and results of mechanical measurements including reproducibility will be reported.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPMR053
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THOBB01	PAL-XFEL Linac RF System	3192
	H.-S. Lee, H. Heo, J. Hu, H.-S. Kang, K.W. Kim, K.H. Kim, S.H. Kim, I.S. Ko, S.S. Park, Y.J. Park PAL, Pohang, Kyungbuk, Republic of Korea H. Matsumoto KEK, Tokai, Ibaraki, Japan
	The PAL-XFEL hard X-ray linac has a 716 m long gallery and tunnel for 10 GeV. Forty nine modulators are necessary in the hard X-ray gallery for an X-band linearizer, an S-band RF gun, two S-band deflectors and 45 S-band klystrons for accelerating structures. They have been installed completely from March 15, 2015 to December 30, 2015 after completing the building construction. There are 51 modulators, 178 accelerators structures, 42 SLEDs in the hard X-ray linac and the soft X-ray linac. The RF conditioning of the klystrons, SLEDs and accelerating structures were stated from November 24, 2015. We describe the PAL-XFEL system and the current status of the linac RF system.
	Slides THOBB01 [22.023 MB]
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THOBB01
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THPMY028	Technical Overview of the PAL-XFEL Conventional Facility	3715
	I. Mok, M.S. Hwang, T.-H. Kang, K.W. Kim, K.R. Kim, S.H. Kim, S.N. Kim, Y. C. Kim, B.H. Lee, H.M. Lee, M.S. Lee, B.I. Moon, K.W. Seo, C.H. Son, C.W. Sung, J. Yang PAL, Pohang, Republic of Korea Y.C. Kim, J.H. Lee Haenglim Architecture & Engineering Co. Ltd, Seoul, Republic of Korea I.S. Ko POSTECH, Pohang, Kyungbuk, Republic of Korea S.W. Yong Posco Engineering & Construction., Ltd., Gyeongsangbuk-do, Republic of Korea
	Pohang Accelerator Laboratory (PAL) has finished construction of a 1,110m long 10GeV X-ray free electron laser (XFEL) linear accelerator building in FY2015. In order to secure high-sensitive of XFEL accelerating devices, more advanced and well proven technologies were adopted in the design of the building. These are the ground improvement underneath the tunnel and tunnel structure itself against the possible ground deformation, air conditioning system to maintain the temperature and humidity in the tolerable ranges and architectural zoning. In this paper we describe the features of design and construction of the XFEL accelerator building.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMY028
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THPMY029	Technical Overview of the PAL-XFEL Low-Conductivity Water Cooling System	3718
	B.H. Lee, H.-G. Kim, K.W. Kim, K.R. Kim, S.H. Kim, Y. C. Kim, H.M. Lee, M.S. Lee, H. Matsumoto, I. Mok, C.W. Sung, J. Yang PAL, Pohang, Republic of Korea J.H. Jeon Taeyoung, Seoul, Republic of Korea K.T. Kim HMT, Pohang, Republic of Korea I.S. Ko POSTECH, Pohang, Kyungbuk, Republic of Korea
	Pohang Accelerator Laboratory (PAL) started operation of an X-ray Free Electron Laser (XFEL) based on 10GeV linear accelerator in FY2015. For accurate temperature control of the various XFEL accelerator devices, a low-conductivity water (LCW) cooling system were installed. The LCW pump station generates LCW controlling the temperature variation within ±0.1°C. The LCW is supplied to klystrons including modulators and various control devices. On the other hand, the precision temperature controlled water to minimize temperature variation down to ±0.02°C. This water is supplied to accelerating columns, wave guide and SLED. Therefore, this paper shows the design, construction and operation of the LCW cooling system.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMY029
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Paper

Title

Page

Technical Overview of Cavity BPM Mover for PAL XFEL

2395

H.-G. Lee, S.-H. Jeong, Y.-G. Jung, H.-S. Kang, D.E. Kim, K.W. Kim, S.B. Lee, D.H. Na, B.G. Oh, K.-H. Park, H.S. Suh, Y.J. Suh
PAL, Pohang, Republic of Korea

Pohang Accelerator Laboratory(PAL) has been developing a SASE X-ray Free Electron Laser based on 10 GeV linear accelerator. The cavity BPM mover was developed to be used in the intersections of the Undulator Systems. The main specifications include submicron repeatability for a 50 kg cavity BPM adjusting system within compact dimensions and a ±1.5 mm stroke in the vertical and horizontal direction. Compact linear motion guide based on 5-phase stepping motors have been chosen. A closed-loop control system has been developed to achieve this repeatability. For the feedback, one digital probe sensor for each axis was used. Mechanical switches are used to limit movement. In addition, hard-stops are included for emergency. In this report, we describe the design of the stages used for precise movement and results of mechanical measurements including reproducibility will be reported.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPMR053

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

THOBB01

PAL-XFEL Linac RF System

3192

H.-S. Lee, H. Heo, J. Hu, H.-S. Kang, K.W. Kim, K.H. Kim, S.H. Kim, I.S. Ko, S.S. Park, Y.J. Park
PAL, Pohang, Kyungbuk, Republic of Korea
H. Matsumoto
KEK, Tokai, Ibaraki, Japan

The PAL-XFEL hard X-ray linac has a 716 m long gallery and tunnel for 10 GeV. Forty nine modulators are necessary in the hard X-ray gallery for an X-band linearizer, an S-band RF gun, two S-band deflectors and 45 S-band klystrons for accelerating structures. They have been installed completely from March 15, 2015 to December 30, 2015 after completing the building construction. There are 51 modulators, 178 accelerators structures, 42 SLEDs in the hard X-ray linac and the soft X-ray linac. The RF conditioning of the klystrons, SLEDs and accelerating structures were stated from November 24, 2015. We describe the PAL-XFEL system and the current status of the linac RF system.

Slides THOBB01 [22.023 MB]

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THOBB01

Export •

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

THPMY028

Technical Overview of the PAL-XFEL Conventional Facility

3715

I. Mok, M.S. Hwang, T.-H. Kang, K.W. Kim, K.R. Kim, S.H. Kim, S.N. Kim, Y. C. Kim, B.H. Lee, H.M. Lee, M.S. Lee, B.I. Moon, K.W. Seo, C.H. Son, C.W. Sung, J. Yang
PAL, Pohang, Republic of Korea
Y.C. Kim, J.H. Lee
Haenglim Architecture & Engineering Co. Ltd, Seoul, Republic of Korea
I.S. Ko
POSTECH, Pohang, Kyungbuk, Republic of Korea
S.W. Yong
Posco Engineering & Construction., Ltd., Gyeongsangbuk-do, Republic of Korea

Pohang Accelerator Laboratory (PAL) has finished construction of a 1,110m long 10GeV X-ray free electron laser (XFEL) linear accelerator building in FY2015. In order to secure high-sensitive of XFEL accelerating devices, more advanced and well proven technologies were adopted in the design of the building. These are the ground improvement underneath the tunnel and tunnel structure itself against the possible ground deformation, air conditioning system to maintain the temperature and humidity in the tolerable ranges and architectural zoning. In this paper we describe the features of design and construction of the XFEL accelerator building.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMY028

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

THPMY029

Technical Overview of the PAL-XFEL Low-Conductivity Water Cooling System

3718

B.H. Lee, H.-G. Kim, K.W. Kim, K.R. Kim, S.H. Kim, Y. C. Kim, H.M. Lee, M.S. Lee, H. Matsumoto, I. Mok, C.W. Sung, J. Yang
PAL, Pohang, Republic of Korea
J.H. Jeon
Taeyoung, Seoul, Republic of Korea
K.T. Kim
HMT, Pohang, Republic of Korea
I.S. Ko
POSTECH, Pohang, Kyungbuk, Republic of Korea

Pohang Accelerator Laboratory (PAL) started operation of an X-ray Free Electron Laser (XFEL) based on 10GeV linear accelerator in FY2015. For accurate temperature control of the various XFEL accelerator devices, a low-conductivity water (LCW) cooling system were installed. The LCW pump station generates LCW controlling the temperature variation within ±0.1°C. The LCW is supplied to klystrons including modulators and various control devices. On the other hand, the precision temperature controlled water to minimize temperature variation down to ±0.02°C. This water is supplied to accelerating columns, wave guide and SLED. Therefore, this paper shows the design, construction and operation of the LCW cooling system.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMY029

Export •

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