IPAC2015 - List of Authors (Chiu, P.C.)

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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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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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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MOPTY075	Vibration Measurement of the Magnets in the Storage Ring of TPS	1112
	C.H. Huang, Y.-S. Cheng, P.C. Chiu, K.T. Hsu, D. Lee, C.Y. Liao NSRRC, Hsinchu, Taiwan
	Taiwan photon source is a 3rd generation synchrotron light source which is in beam commissioning at NSRRC. Orbit stability within 100 nm range is essential for such a small emittance light source. Technical noise from the vacuum pumps, water flow, etc. will cause the vibration of quadrupoles and deleterious orbit stability. In order to investigate the magnitude of vibration in the magnets of the storage ring, the vibration spectra of the lattice quadruples; the coherence between the magnets, girders and ground will be systematic investigated in this report.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPTY075
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MOPTY076	Development of EPICS Applications for the Taiwan Light Source	1116
	Y.-S. Cheng, J. Chen, P.C. Chiu, K.T. Hsu, C.H. Huang, C.Y. Liao NSRRC, Hsinchu, Taiwan
	The TLS (Taiwan Light Source) is a third generation of synchrotron light source, and it has been operated since 1993. The TLS control system is a proprietary design. It was performed minor upgrade several times to avoid obsolete of some system components and keep up-to-date during last two decades. The control system of the TPS project (Taiwan Photon Source) is based upon the EPICS framework. To save resources for TLS control system maintenance, adopt EPICS for newly developed and rejuvenated subsystems for some of the TLS control interfaces includes BPM system, insertion devices, bunch-by-bunch feedbacks, electronics instruments interface and so on. Some EPICS related applications have been developed, and EPICS graphical user interface is also operated at the TLS control consoles environment normally. Current system allowed two kinds of control environments working together. The efforts will be described at this report.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPTY076
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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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WEPHA040	Status of AC Power Supplies for TPS Booster Ring	3203
	Y.-C. Chien, P.C. Chiu, K.T. Hsu, C.Y. Liu, K.-B. Liu, B.S. Wang, Y.S. Wong, C.Y. Wu NSRRC, Hsinchu, Taiwan
	TPS is a third generation 3 GeV synchrotron light source under commission in Taiwan. The TPS Booster ring is concentric ring design sharing the same tunnel with storage ring. The booster ring power supplies are responsible of accelerating the 150 MeV Linac output energy to 3 GeV before the beam is preserved in the storage ring. The booster ring power supplies are required to operate at 3Hz sinusoidal waveform with 1000 A peak current for the dipole magnet. All power supplies' specifications and output performance are demonstrated here in this paper.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPHA040
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WEPHA041	ALGORITHM AND CIRCUIT TO IMPROVE ZERO-CROSSING STABILITY OF BIPOLAR TPS TRIM COIL POWER SUPPLY	3206
	B.S. Wang, Y.-C. Chien, P.C. Chiu, K.T. Hsu, C.Y. Liu, K.-B. Liu, Y.S. Wong, C.Y. Wu NSRRC, Hsinchu, Taiwan
	In TPS (Taiwan Photon Source) project, 58 home-built small form factor bipolar power supplies are used to fine-tune the trim coil of booster ring bending dipole magnets. With the preliminary analog PI control loop design version, current output will tend to behave with poor linearity around zero current. By employing DSP chip, a full digital PI control loop design together with optimal MOSFT switching algorithm and 13bits PWM output capability is capable of improving the output current performance around zero current. Before the final realization, MATLAB SIMULINK is utilized to find out the optimal MOSFT switching algorithm, and then physical circuit is implemented and tested. The result and design will be demonstrated in this paper to show significant improvement around zero current.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPHA041
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

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)

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)

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)

MOPTY075

Vibration Measurement of the Magnets in the Storage Ring of TPS

1112

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

Taiwan photon source is a 3rd generation synchrotron light source which is in beam commissioning at NSRRC. Orbit stability within 100 nm range is essential for such a small emittance light source. Technical noise from the vacuum pumps, water flow, etc. will cause the vibration of quadrupoles and deleterious orbit stability. In order to investigate the magnitude of vibration in the magnets of the storage ring, the vibration spectra of the lattice quadruples; the coherence between the magnets, girders and ground will be systematic investigated in this report.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPTY075

Export •

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

MOPTY076

Development of EPICS Applications for the Taiwan Light Source

1116

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

The TLS (Taiwan Light Source) is a third generation of synchrotron light source, and it has been operated since 1993. The TLS control system is a proprietary design. It was performed minor upgrade several times to avoid obsolete of some system components and keep up-to-date during last two decades. The control system of the TPS project (Taiwan Photon Source) is based upon the EPICS framework. To save resources for TLS control system maintenance, adopt EPICS for newly developed and rejuvenated subsystems for some of the TLS control interfaces includes BPM system, insertion devices, bunch-by-bunch feedbacks, electronics instruments interface and so on. Some EPICS related applications have been developed, and EPICS graphical user interface is also operated at the TLS control consoles environment normally. Current system allowed two kinds of control environments working together. The efforts will be described at this report.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPTY076

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)

WEPHA040

Status of AC Power Supplies for TPS Booster Ring

3203

Y.-C. Chien, P.C. Chiu, K.T. Hsu, C.Y. Liu, K.-B. Liu, B.S. Wang, Y.S. Wong, C.Y. Wu
NSRRC, Hsinchu, Taiwan

TPS is a third generation 3 GeV synchrotron light source under commission in Taiwan. The TPS Booster ring is concentric ring design sharing the same tunnel with storage ring. The booster ring power supplies are responsible of accelerating the 150 MeV Linac output energy to 3 GeV before the beam is preserved in the storage ring. The booster ring power supplies are required to operate at 3Hz sinusoidal waveform with 1000 A peak current for the dipole magnet. All power supplies' specifications and output performance are demonstrated here in this paper.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPHA040

Export •

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

WEPHA041

ALGORITHM AND CIRCUIT TO IMPROVE ZERO-CROSSING STABILITY OF BIPOLAR TPS TRIM COIL POWER SUPPLY

3206

B.S. Wang, Y.-C. Chien, P.C. Chiu, K.T. Hsu, C.Y. Liu, K.-B. Liu, Y.S. Wong, C.Y. Wu
NSRRC, Hsinchu, Taiwan

In TPS (Taiwan Photon Source) project, 58 home-built small form factor bipolar power supplies are used to fine-tune the trim coil of booster ring bending dipole magnets. With the preliminary analog PI control loop design version, current output will tend to behave with poor linearity around zero current. By employing DSP chip, a full digital PI control loop design together with optimal MOSFT switching algorithm and 13bits PWM output capability is capable of improving the output current performance around zero current. Before the final realization, MATLAB SIMULINK is utilized to find out the optimal MOSFT switching algorithm, and then physical circuit is implemented and tested. The result and design will be demonstrated in this paper to show significant improvement around zero current.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPHA041

Export •

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