IPAC2016 - List of Authors (Chen, PY.)

Paper	Title	Page
MOPMY033	Effect of Bandwidth of Low Level Radio Frequency System on the Instability of an Electron Beam	570
	Z.K. Liu, L.-H. Chang, M.H. Chang, L.J. Chen, PY. Chen, F.-T. Chung, M.-C. Lin, C.H. Lo, C.L. Tsai, M.H. Tsai, Ch. Wang, M.-S. Yeh, T.-C. Yu NSRRC, Hsinchu, Taiwan
	The analog Low Level Radio Frequency (LLRF) system is used at Taiwan Photon Source (TPS) RF system. It is composed of three feedback loops to control the amplitude and phase of accelerating field and the frequency of RF cavity. Instability of electron beam and accelerating field due to the bandwidth of LLRF system were observed during the TPS commissioning. This effect was studied and the results will be presented in this paper.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMY033
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WEPMB053	Study of Third Harmonic Cavity for Taiwan Photon Source	2237
	Z.K. Liu, L.-H. Chang, M.H. Chang, L.J. Chen, PY. Chen, F.-T. Chung, M.-C. Lin, C.H. Lo, C.L. Tsai, M.H. Tsai, Ch. Wang, M.-S. Yeh, T.-C. Yu NSRRC, Hsinchu, Taiwan
	Taiwan Photon Source (TPS) is a modern light source with 3 GeV electron energy and low emittance. The bunch length is about 3 mm at designed beam current of 500 mA and operating gap voltage of 3.2 MV. The short bunch length results in short Touschek lifetime and high parasitic loss of insertion device (ID). Some of the undulators are operated in vacuum at TPS, therefore the head load become an important issue. To install higher harmonic cavity is a solution for improving the Touschek lifetime and the heat load by lengthening the bunch length. The effect of installing 3rd harmonic cavity for TPS is investigated. The expected maximum elongation factor for bunch lengthening, as well as the effect on the Touschek lifetime and heat load of ID are presented in this paper.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPMB053
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THPMY037	Realization of a System to Monitor Water Quality and for Cooling a TPS KEKB Superconducting Cavity CPL/HOM	3740
	L.J. Chen, F.-Y. Chang, L.-H. Chang, M.H. Chang, PY. Chen, F.-T. Chung, M.-C. Lin, Z.K. Liu, C.H. Lo, C.L. Tsai, M.H. Tsai, Ch. Wang, M.-S. Yeh, T.-C. Yu NSRRC, Hsinchu, Taiwan
	Taiwan Photon Source (TPS) is a 3GeV synchrotron accelerator and is built next to the present Taiwan Light Source (TLS) [1]. The stability of electron beam is pro-vided by Low-level RF control system for keeping Gap voltage and phase to be constant[2]. The Gap voltage for accelerating electron beam is provided by KEKB super-conducting cavity. During routine operation of the super-conducting cavity, water cooling system is necessary for stabilize the accessory components of the cavity to avoid damage or abnormal of the system. This article would introduce the realization and integration of the water quality monitoring and cooling system for TPS supercon-ducting cavity input coupler and high order mode damper (CPL/HOM). Brief description is shown in first section. The detail architecture and function of the designed signal monitoring system will be discussed in 2nd section. The 3rd section will have further description of interlocks for system protection. The final section would summarize the water quality monitoring and cooling system in this article.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMY037
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Effect of Bandwidth of Low Level Radio Frequency System on the Instability of an Electron Beam

570

Z.K. Liu, L.-H. Chang, M.H. Chang, L.J. Chen, PY. Chen, F.-T. Chung, M.-C. Lin, C.H. Lo, C.L. Tsai, M.H. Tsai, Ch. Wang, M.-S. Yeh, T.-C. Yu
NSRRC, Hsinchu, Taiwan

The analog Low Level Radio Frequency (LLRF) system is used at Taiwan Photon Source (TPS) RF system. It is composed of three feedback loops to control the amplitude and phase of accelerating field and the frequency of RF cavity. Instability of electron beam and accelerating field due to the bandwidth of LLRF system were observed during the TPS commissioning. This effect was studied and the results will be presented in this paper.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMY033

Export •

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

WEPMB053

Study of Third Harmonic Cavity for Taiwan Photon Source

2237

Z.K. Liu, L.-H. Chang, M.H. Chang, L.J. Chen, PY. Chen, F.-T. Chung, M.-C. Lin, C.H. Lo, C.L. Tsai, M.H. Tsai, Ch. Wang, M.-S. Yeh, T.-C. Yu
NSRRC, Hsinchu, Taiwan

Taiwan Photon Source (TPS) is a modern light source with 3 GeV electron energy and low emittance. The bunch length is about 3 mm at designed beam current of 500 mA and operating gap voltage of 3.2 MV. The short bunch length results in short Touschek lifetime and high parasitic loss of insertion device (ID). Some of the undulators are operated in vacuum at TPS, therefore the head load become an important issue. To install higher harmonic cavity is a solution for improving the Touschek lifetime and the heat load by lengthening the bunch length. The effect of installing 3rd harmonic cavity for TPS is investigated. The expected maximum elongation factor for bunch lengthening, as well as the effect on the Touschek lifetime and heat load of ID are presented in this paper.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPMB053

Export •

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

THPMY037

Realization of a System to Monitor Water Quality and for Cooling a TPS KEKB Superconducting Cavity CPL/HOM

3740

L.J. Chen, F.-Y. Chang, L.-H. Chang, M.H. Chang, PY. Chen, F.-T. Chung, M.-C. Lin, Z.K. Liu, C.H. Lo, C.L. Tsai, M.H. Tsai, Ch. Wang, M.-S. Yeh, T.-C. Yu
NSRRC, Hsinchu, Taiwan

Taiwan Photon Source (TPS) is a 3GeV synchrotron accelerator and is built next to the present Taiwan Light Source (TLS) [1]. The stability of electron beam is pro-vided by Low-level RF control system for keeping Gap voltage and phase to be constant[2]. The Gap voltage for accelerating electron beam is provided by KEKB super-conducting cavity. During routine operation of the super-conducting cavity, water cooling system is necessary for stabilize the accessory components of the cavity to avoid damage or abnormal of the system. This article would introduce the realization and integration of the water quality monitoring and cooling system for TPS supercon-ducting cavity input coupler and high order mode damper (CPL/HOM). Brief description is shown in first section. The detail architecture and function of the designed signal monitoring system will be discussed in 2nd section. The 3rd section will have further description of interlocks for system protection. The final section would summarize the water quality monitoring and cooling system in this article.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMY037

Export •

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