IPAC2015 - List of Authors (Hu, K.H.)

Paper	Title	Page
MOPTY064	Compensation Strategies for Ramping Waveform of TPS Booster Synchrotron Main Power Supplies	1088
	P.C. Chiu, J. Chen, Y.-S. Cheng, K.T. Hsu, K.H. Hu, K.-B. Liu, B.S. Wang, C.Y. Wu NSRRC, Hsinchu, Taiwan
	Booster synchrotron for the Taiwan photon source project which is a 3 GeV synchrotron light source constructed at NSRRC is in commissioning. The booster is designed to ramp electron beams from 150 MeV to 3 GeV in 3 Hz therefore the large main power supplies have features of waveform play with trigger functionalities to enable electron beams ramp from 150 MeV to 3 GeV in 3 Hz. However, due to limited bandwidth of power supplies, different magnet loading will result in quite different phase lag for dipoles and four quadrupoles families. To improve tracking error between quadrupole to dipole readings, several strategies are developed and will be summarized in this report.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPTY064
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MOPTY069	Control Interface and Functionality of TPS Booster Power Supply	1094
	C.Y. Wu, J. Chen, Y.-S. Cheng, P.C. Chiu, K.T. Hsu, K.H. Hu, C.H. Huang, D. Lee, C.Y. Liao NSRRC, Hsinchu, Taiwan
	The TPS booster is a synchrotron with injection energy at 150 MeV and extraction energy at 3 GeV in 3 Hz. Booster main power supplies consist of one dipole power supply with maximum current 1200 Ampere and four quadrupole family power supplies with maximum current of 120/150 Ampere. The small power supply for booster corrector and sextupole is a low noise switching power supply with ± 10 Ampere current range. The TPS booster control environment is based on EPICS framework to support rich functionalities including power supply control, waveform management, operation supports, and so on. All power supplies support DC mode and 3 Hz ramping mode operation for TPS booster commissioning and operation. Efforts on control interface and functionality for TPS booster power supply will be summarizes.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPTY069
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MOPTY070	Online RadFET Reader for Beam Loss Monitoring System	1097
	C.H. Huang, J. Chen, Y.-S. Cheng, K.T. Hsu, K.H. Hu, D. Lee, C.Y. Wu NSRRC, Hsinchu, Taiwan
	To investigate the beam loss and its distribution during operation of synchrotron light sources at NSSRC, a sixteen-channel readout box is designed and implemented to read the threshold voltage of the RadFETs installed at accelerator tunnel. To simplify the design, the reader plays a role of remote I/O for EPICS IOC. The IOC collects voltage from readers distributed in the accelerator to deduce the integrated dose and dose rate. User interface is shown in the control console for real-time display and the archived data are processed off-line.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPTY070
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MOPTY071	FPGA Based Global Orbit Feedback in the Taiwan Light Source	1100
	C.H. Kuo, Y.-S. Cheng, P.C. Chiu, K.T. Hsu, K.H. Hu, D. Lee NSRRC, Hsinchu, Taiwan
	The global orbit feedback for the 1.5 GeV electron storage ring of TLS has been operated more than ten years. This system uses general processors to control feedback loop with 1 kHz rate. It is very important for various operation of storage ring now, but some hardware components could have been out of stock in the future. As a prototype, a FPGA based fast global orbit feedback at a 10 kHz data acquisition rate has been developed. A micro-TCA liked platform with FPGA board is used to implement control algorithm and acquire BPM data from Libera Brillance. The correction algorithm is written in VHDL and connected to power supply with AURORA digital links. The system architecture will be discussed in this report.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPTY071
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MOPTY072	Beam Loss Study of TLS Using RadFETs	1103
	C.H. Huang, J. Chen, Y.-S. Cheng, K.T. Hsu, K.H. Hu, D. Lee, C.Y. Wu NSRRC, Hsinchu, Taiwan
	To realize the beam loss during the operation of Taiwan light source, P-type radiation-sensing field-effect transistors are setup around the storage ring. A sixteen-channel readout box is used to read the threshold voltage of the radiation-sensing field-effect transistors during irradiation. The beam loss distribution and mechanism at the injection period, decay mode and top up injection for routing operation will be studied in this report.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPTY072
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MOPTY073	Commissioning of BPM System for TPS Booster Synchrotron	1106
	P.C. Chiu, Y.-S. Cheng, K.T. Hsu, K.H. Hu, C.H. Kuo NSRRC, Hsinchu, Taiwan
	The TPS is a latest generation of high brightness synchrotron light source and ready for commissioning. It consists of a 150 MeV electron linac, a booster synchrotron, a 3 GeV storage ring, and experimental beam lines. The BPM electronics Libera Brilliance⁺ are adopted for booster and storage ring of Taiwan Photon Source (TPS). The provided BPM data is useful for beam commissioning where it can be used to measure beam position, rough beam intensity along the longitudinal position and also for tune measurement. This report summarizes the efforts on BPM measurement and related diagnostic tools during TPS booster commissioning.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPTY073
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MOPTY074	Preliminary Beam Test of Synchrotron Radiation Monitoring System at Taiwan Photon Source	1109
	C.Y. Liao, Y.-S. Cheng, J. -Y. Chuang, K.T. Hsu, S.Y. Hsu, H.P. Hsueh, K.H. Hu, C.K. Kuan, C.Y. Wu NSRRC, Hsinchu, Taiwan
	Taiwan Photon Source (TPS) is a third generation 3 GeV synchrotron light facility. The synchrotron radiation from a dipole can be used to observe the beam parameters. The synchrotron radiation monitor (SRM) systems were designed and implemented for the booster synchrotron and storage ring. The SRM for the booster synchrotron can serve to diagnose the energy ramping process. The beam size decreases when the energy increases was observed. In the storage ring, the streak camera was preferred to observe the beam behaviour of the consecutive bunches. The bunch length and longitudinal instability were observed. The preliminary beam test results are summarized in this report.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPTY074
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MOPTY077	Control Interface of Pulse Magnet Power Supply for TPS Project	1120
	C.Y. Wu, J. Chen, Y.-S. Cheng, C.-S. Fann, K.T. Hsu, S.Y. Hsu, K.H. Hu, C.H. Huang, D. Lee, C.Y. Liao, K.-K. Lin NSRRC, Hsinchu, Taiwan
	The TPS (Taiwan Photon Source) is low emittance 3 GeV synchrotron light source. The design and implementation of a pulse magnet power supply control system for beam injection and extraction were done. The EPICS embedded programmable logic controller (PLC) was applied to control pulse magnet power supply. The system comprises various input/output modules and a CPU module with built-in Ethernet interface. The control information (status of the power supply, ON, OFF, warn up, reset, reading/setting voltage, etc.) can be accessed remotely using EPICS client tools. The TPS timing system provide trigger signals for pulse magnet power supplies. The Ethernet-based oscilloscope is employed to observe current waveform of pulse magnet power supply with EPICS support. This paper describes control interface and operation GUI for the TPS pulse magnet power supply.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPTY077
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TUPJE053	Hardware Improvements and Beam Commissioning of the Booster Ring in Taiwan Photon Source	1741
	H.-J. Tsai, C.-T. Chen, J.Y. Chen, M.-S. Chiu, P.C. Chiu, P.J. Chou, K.T. Hsu, K.H. Hu, C.-C. Kuo, Y.-C. Liu, G.-H. Luo, F.H. Tseng NSRRC, Hsinchu, Taiwan
	Taiwan Photon Source (TPS), a low emittance 3-GeV third-generation synchrotron light source, began its hardware integration testing, safety checkout and beam commissioning on August 12, 2014 [1]. The booster ring and the storage ring share the same tunnel in a concentric fashion; the booster ring has circumference 496.8 m, the largest among light source facilities in operation. A combined-function FODO lattice is adopted for the booster ring with natural emittance 10 nm-rad. After hardware improvements were completed, the commissioning of the beam in the booster ring began on December 12 and attained the 3-GeV design energy on December 16.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-TUPJE053
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Paper

Title

Page

Compensation Strategies for Ramping Waveform of TPS Booster Synchrotron Main Power Supplies

1088

P.C. Chiu, J. Chen, Y.-S. Cheng, K.T. Hsu, K.H. Hu, K.-B. Liu, B.S. Wang, C.Y. Wu
NSRRC, Hsinchu, Taiwan

Booster synchrotron for the Taiwan photon source project which is a 3 GeV synchrotron light source constructed at NSRRC is in commissioning. The booster is designed to ramp electron beams from 150 MeV to 3 GeV in 3 Hz therefore the large main power supplies have features of waveform play with trigger functionalities to enable electron beams ramp from 150 MeV to 3 GeV in 3 Hz. However, due to limited bandwidth of power supplies, different magnet loading will result in quite different phase lag for dipoles and four quadrupoles families. To improve tracking error between quadrupole to dipole readings, several strategies are developed and will be summarized in this report.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPTY064

Export •

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

MOPTY069

Control Interface and Functionality of TPS Booster Power Supply

1094

C.Y. Wu, J. Chen, Y.-S. Cheng, P.C. Chiu, K.T. Hsu, K.H. Hu, C.H. Huang, D. Lee, C.Y. Liao
NSRRC, Hsinchu, Taiwan

The TPS booster is a synchrotron with injection energy at 150 MeV and extraction energy at 3 GeV in 3 Hz. Booster main power supplies consist of one dipole power supply with maximum current 1200 Ampere and four quadrupole family power supplies with maximum current of 120/150 Ampere. The small power supply for booster corrector and sextupole is a low noise switching power supply with ± 10 Ampere current range. The TPS booster control environment is based on EPICS framework to support rich functionalities including power supply control, waveform management, operation supports, and so on. All power supplies support DC mode and 3 Hz ramping mode operation for TPS booster commissioning and operation. Efforts on control interface and functionality for TPS booster power supply will be summarizes.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPTY069

Export •

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

MOPTY070

Online RadFET Reader for Beam Loss Monitoring System

1097

C.H. Huang, J. Chen, Y.-S. Cheng, K.T. Hsu, K.H. Hu, D. Lee, C.Y. Wu
NSRRC, Hsinchu, Taiwan

To investigate the beam loss and its distribution during operation of synchrotron light sources at NSSRC, a sixteen-channel readout box is designed and implemented to read the threshold voltage of the RadFETs installed at accelerator tunnel. To simplify the design, the reader plays a role of remote I/O for EPICS IOC. The IOC collects voltage from readers distributed in the accelerator to deduce the integrated dose and dose rate. User interface is shown in the control console for real-time display and the archived data are processed off-line.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPTY070

Export •

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

MOPTY071

FPGA Based Global Orbit Feedback in the Taiwan Light Source

1100

C.H. Kuo, Y.-S. Cheng, P.C. Chiu, K.T. Hsu, K.H. Hu, D. Lee
NSRRC, Hsinchu, Taiwan

The global orbit feedback for the 1.5 GeV electron storage ring of TLS has been operated more than ten years. This system uses general processors to control feedback loop with 1 kHz rate. It is very important for various operation of storage ring now, but some hardware components could have been out of stock in the future. As a prototype, a FPGA based fast global orbit feedback at a 10 kHz data acquisition rate has been developed. A micro-TCA liked platform with FPGA board is used to implement control algorithm and acquire BPM data from Libera Brillance. The correction algorithm is written in VHDL and connected to power supply with AURORA digital links. The system architecture will be discussed in this report.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPTY071

Export •

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

MOPTY072

Beam Loss Study of TLS Using RadFETs

1103

C.H. Huang, J. Chen, Y.-S. Cheng, K.T. Hsu, K.H. Hu, D. Lee, C.Y. Wu
NSRRC, Hsinchu, Taiwan

To realize the beam loss during the operation of Taiwan light source, P-type radiation-sensing field-effect transistors are setup around the storage ring. A sixteen-channel readout box is used to read the threshold voltage of the radiation-sensing field-effect transistors during irradiation. The beam loss distribution and mechanism at the injection period, decay mode and top up injection for routing operation will be studied in this report.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPTY072

Export •

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

MOPTY073

Commissioning of BPM System for TPS Booster Synchrotron

1106

P.C. Chiu, Y.-S. Cheng, K.T. Hsu, K.H. Hu, C.H. Kuo
NSRRC, Hsinchu, Taiwan

The TPS is a latest generation of high brightness synchrotron light source and ready for commissioning. It consists of a 150 MeV electron linac, a booster synchrotron, a 3 GeV storage ring, and experimental beam lines. The BPM electronics Libera Brilliance⁺ are adopted for booster and storage ring of Taiwan Photon Source (TPS). The provided BPM data is useful for beam commissioning where it can be used to measure beam position, rough beam intensity along the longitudinal position and also for tune measurement. This report summarizes the efforts on BPM measurement and related diagnostic tools during TPS booster commissioning.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPTY073

Export •

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

MOPTY074

Preliminary Beam Test of Synchrotron Radiation Monitoring System at Taiwan Photon Source

1109

C.Y. Liao, Y.-S. Cheng, J. -Y. Chuang, K.T. Hsu, S.Y. Hsu, H.P. Hsueh, K.H. Hu, C.K. Kuan, C.Y. Wu
NSRRC, Hsinchu, Taiwan

Taiwan Photon Source (TPS) is a third generation 3 GeV synchrotron light facility. The synchrotron radiation from a dipole can be used to observe the beam parameters. The synchrotron radiation monitor (SRM) systems were designed and implemented for the booster synchrotron and storage ring. The SRM for the booster synchrotron can serve to diagnose the energy ramping process. The beam size decreases when the energy increases was observed. In the storage ring, the streak camera was preferred to observe the beam behaviour of the consecutive bunches. The bunch length and longitudinal instability were observed. The preliminary beam test results are summarized in this report.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPTY074

Export •

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

MOPTY077

Control Interface of Pulse Magnet Power Supply for TPS Project

1120

C.Y. Wu, J. Chen, Y.-S. Cheng, C.-S. Fann, K.T. Hsu, S.Y. Hsu, K.H. Hu, C.H. Huang, D. Lee, C.Y. Liao, K.-K. Lin
NSRRC, Hsinchu, Taiwan

The TPS (Taiwan Photon Source) is low emittance 3 GeV synchrotron light source. The design and implementation of a pulse magnet power supply control system for beam injection and extraction were done. The EPICS embedded programmable logic controller (PLC) was applied to control pulse magnet power supply. The system comprises various input/output modules and a CPU module with built-in Ethernet interface. The control information (status of the power supply, ON, OFF, warn up, reset, reading/setting voltage, etc.) can be accessed remotely using EPICS client tools. The TPS timing system provide trigger signals for pulse magnet power supplies. The Ethernet-based oscilloscope is employed to observe current waveform of pulse magnet power supply with EPICS support. This paper describes control interface and operation GUI for the TPS pulse magnet power supply.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPTY077

Export •

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

TUPJE053

Hardware Improvements and Beam Commissioning of the Booster Ring in Taiwan Photon Source

1741

H.-J. Tsai, C.-T. Chen, J.Y. Chen, M.-S. Chiu, P.C. Chiu, P.J. Chou, K.T. Hsu, K.H. Hu, C.-C. Kuo, Y.-C. Liu, G.-H. Luo, F.H. Tseng
NSRRC, Hsinchu, Taiwan

Taiwan Photon Source (TPS), a low emittance 3-GeV third-generation synchrotron light source, began its hardware integration testing, safety checkout and beam commissioning on August 12, 2014 [1]. The booster ring and the storage ring share the same tunnel in a concentric fashion; the booster ring has circumference 496.8 m, the largest among light source facilities in operation. A combined-function FODO lattice is adopted for the booster ring with natural emittance 10 nm-rad. After hardware improvements were completed, the commissioning of the beam in the booster ring began on December 12 and attained the 3-GeV design energy on December 16.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-TUPJE053

Export •

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