IBIC2014 - List of Authors (Kang, H.-S.)

Paper	Title	Page
MOPD19	Bunch Arrival Time Monitor for PAL-XFEL	191
	J.H. Hong, J.H. Han, H.-S. Kang, C. Kim, H. Yang PAL, Pohang, Kyungbuk, Republic of Korea
	The X-ray Free Electron Laser project in Pohang Accelerator Laboratory (PAL-XFEL) requires high stability of bunch arrival time, and measurement resolution better than a few femtoseconds. The pickups of the electron Bunch Arrival time Monitor (BAM) for PAL-XFEL have been developed and simulated. The BAM pickups are based on an S-band monopole cavity with two coupling loops. The prototype BAM has been fabricated and installed downstream of the accelerating column at the Injector Test Facility (ITF) for PAL-XFEL. In this paper we will present the recent measurement results on the beam test of the BAM as well as a proposed strategy for developing the BAM for PAL-XFEL.
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TUPD16	Development of the Transverse Beam Profile Monitors for the PAL-XFEL	452
	I.Y. Kim, J.Y. Choi, H. Heo, H.-S. Kang, C. Kim, G. Mun, B.G. Oh, S.J. Park PAL, Pohang, Kyungbuk, Republic of Korea
	The PAL-XFEL is an X-ray free electron laser under construnction at the Pohang Accelerator Laboratory (PAL), Korea. In the PAL-XFEL, the electron beam can make coherent optical transition radiation (COTR) due to the microbunching instability in the compressed electron beam. In order to obtain transverse beam profiles without the COTR problem, we are developing scintillating screen monitors (with the geometric suppress method) and wire scanners. In this paper, we report test results at the test facility and progress in the development of the screen monitor and the wire scanner for the PAL-XFEL.
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WEPF09	Introduction to the Test Result of Turbo-ICT in PAL-ITF	553
	H. J. Choi, M.S. Chae, H.-S. Kang, S.J. Park PAL, Pohang, Kyungbuk, Republic of Korea
	Pohang Accelerator Laboratory (PAL) built a PAL-ITF (Injector Test Facility) at the end of 2012 to successfully complete PAL-XFEL (X-ray Free Electron Laser) in 2015. The PAL-ITF is equipped with various kinds of diagnostic equipment to produce high-quality electron bunches. The three main parameters that an injection testing facility should measure are charge, energy and emittance. Although ICT and Faraday Cup were installed to measure beam charge, the noise generated in a klystron modulator not only interrupted accurate measurement but prevented low charges under tens of pC from being measured. Due to the changes in the overall voltage level of ITF, integration of ICT measured value failed to maintain perfect accuracy in terms of methodology (measured value continuously changed by ± 5pC). Accordingly, to solve the noise problems and accurately measure the quantity of electron beam charge, Turbo-ICT was installed. This paper focuses on the processes and test result of electric bunch charge quantity measurements using Turbo-ICT.
	Poster WEPF09 [2.807 MB]
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WEPD17	Commissioning Results of MicroTCA.4 Stripline BPM System	680
	C. Xu, S. Allison, S. L. Hoobler, D.J. Martin, J.J. Olsen, T. Straumann, A. Young SLAC, Menlo Park, California, USA H.-S. Kang, C. Kim, S.J. Lee, G. Mun PAL, Pohang, Kyungbuk, Republic of Korea
	Funding: Work supported by U.S. Department of Energy under Contract Numbers DE-AC02-06CH11357, DE-AC02-76SF00515, and WFOA13-197 SLAC National Accelerator Laboratory is a premier photon science laboratory. SLAC has a Free Electron Laser facility that will produce 0.5 to 77 Angstroms x-rays and a synchrotron light source facility. In order to achieve this high level of performance, the beam position measurement system needs to be accurate so the electron beam bunch can be stable. We have designed a general purpose stripline Beam Position Monitor (BPM) system that has a dynamic range of 10pC to 1nC bunch charge. The BPM system uses the MicroTCA (Micro Telecommunication Computing Architecture) for physics platform that consists of a 14-bit 250 MSPS ADC module (SIS8300 from Struck) that uses the Zone 3 A1.x classification for the Rear Transition Module (RTM). This paper will discuss the commissioning result at SLAC LCLS-I, SLAC SSRL, and Pohang Accelerator Laboratory. The RTM architecture includes a bandpass filter at 300MHz with 30 MHz bandwidth, and an automated BPM calibration process. The RTM communicates with the AMC FPGA using a QSPI interface over the zone 3 connection.
	Poster WEPD17 [5.087 MB]
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Paper

Title

Page

Bunch Arrival Time Monitor for PAL-XFEL

191

J.H. Hong, J.H. Han, H.-S. Kang, C. Kim, H. Yang
PAL, Pohang, Kyungbuk, Republic of Korea

The X-ray Free Electron Laser project in Pohang Accelerator Laboratory (PAL-XFEL) requires high stability of bunch arrival time, and measurement resolution better than a few femtoseconds. The pickups of the electron Bunch Arrival time Monitor (BAM) for PAL-XFEL have been developed and simulated. The BAM pickups are based on an S-band monopole cavity with two coupling loops. The prototype BAM has been fabricated and installed downstream of the accelerating column at the Injector Test Facility (ITF) for PAL-XFEL. In this paper we will present the recent measurement results on the beam test of the BAM as well as a proposed strategy for developing the BAM for PAL-XFEL.

Export •

reference for this paper to ※ LaTeX, ※ Text, ※ IS/RefMan, ※ EndNote (xml)

TUPD16

Development of the Transverse Beam Profile Monitors for the PAL-XFEL

452

I.Y. Kim, J.Y. Choi, H. Heo, H.-S. Kang, C. Kim, G. Mun, B.G. Oh, S.J. Park
PAL, Pohang, Kyungbuk, Republic of Korea

The PAL-XFEL is an X-ray free electron laser under construnction at the Pohang Accelerator Laboratory (PAL), Korea. In the PAL-XFEL, the electron beam can make coherent optical transition radiation (COTR) due to the microbunching instability in the compressed electron beam. In order to obtain transverse beam profiles without the COTR problem, we are developing scintillating screen monitors (with the geometric suppress method) and wire scanners. In this paper, we report test results at the test facility and progress in the development of the screen monitor and the wire scanner for the PAL-XFEL.

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reference for this paper to ※ LaTeX, ※ Text, ※ IS/RefMan, ※ EndNote (xml)

WEPF09

Introduction to the Test Result of Turbo-ICT in PAL-ITF

553

H. J. Choi, M.S. Chae, H.-S. Kang, S.J. Park
PAL, Pohang, Kyungbuk, Republic of Korea

Pohang Accelerator Laboratory (PAL) built a PAL-ITF (Injector Test Facility) at the end of 2012 to successfully complete PAL-XFEL (X-ray Free Electron Laser) in 2015. The PAL-ITF is equipped with various kinds of diagnostic equipment to produce high-quality electron bunches. The three main parameters that an injection testing facility should measure are charge, energy and emittance. Although ICT and Faraday Cup were installed to measure beam charge, the noise generated in a klystron modulator not only interrupted accurate measurement but prevented low charges under tens of pC from being measured. Due to the changes in the overall voltage level of ITF, integration of ICT measured value failed to maintain perfect accuracy in terms of methodology (measured value continuously changed by ± 5pC). Accordingly, to solve the noise problems and accurately measure the quantity of electron beam charge, Turbo-ICT was installed. This paper focuses on the processes and test result of electric bunch charge quantity measurements using Turbo-ICT.

Poster WEPF09 [2.807 MB]

Export •

reference for this paper to ※ LaTeX, ※ Text, ※ IS/RefMan, ※ EndNote (xml)

WEPD17

Commissioning Results of MicroTCA.4 Stripline BPM System

680

C. Xu, S. Allison, S. L. Hoobler, D.J. Martin, J.J. Olsen, T. Straumann, A. Young
SLAC, Menlo Park, California, USA
H.-S. Kang, C. Kim, S.J. Lee, G. Mun
PAL, Pohang, Kyungbuk, Republic of Korea

Funding: Work supported by U.S. Department of Energy under Contract Numbers DE-AC02-06CH11357, DE-AC02-76SF00515, and WFOA13-197
SLAC National Accelerator Laboratory is a premier photon science laboratory. SLAC has a Free Electron Laser facility that will produce 0.5 to 77 Angstroms x-rays and a synchrotron light source facility. In order to achieve this high level of performance, the beam position measurement system needs to be accurate so the electron beam bunch can be stable. We have designed a general purpose stripline Beam Position Monitor (BPM) system that has a dynamic range of 10pC to 1nC bunch charge. The BPM system uses the MicroTCA (Micro Telecommunication Computing Architecture) for physics platform that consists of a 14-bit 250 MSPS ADC module (SIS8300 from Struck) that uses the Zone 3 A1.x classification for the Rear Transition Module (RTM). This paper will discuss the commissioning result at SLAC LCLS-I, SLAC SSRL, and Pohang Accelerator Laboratory. The RTM architecture includes a bandpass filter at 300MHz with 30 MHz bandwidth, and an automated BPM calibration process. The RTM communicates with the AMC FPGA using a QSPI interface over the zone 3 connection.

Poster WEPD17 [5.087 MB]

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reference for this paper to ※ LaTeX, ※ Text, ※ IS/RefMan, ※ EndNote (xml)