Yun-Liang Chu

Development of permanent magnets replacing electromagnets at NSRRC

Jyh-Chyuan Jan, Yang-Yang Hsu, Yun-Liang Chu, Chih‐Sheng Yang et autres

Integrating permanent magnets as substitutes for large electromagnets offers advantages such as energy savings, space efficiency, and low maintenance. An electromagnetic dipole magnet on the TPS transfer line is proposed to be replaced by a permanent magnet. This permanent magnet will be …

Design and implementation of an in-vacuum magnetic field measurement system for the TPS nonlinear in-vacuum kicker

Chih‐Sheng Yang, Chin-Kang Yang, F. Y. Lin, Yun-Liang Chu et autres

The Taiwan Photon Source (TPS) storage ring employs a traditional four-kicker bump off-axis injection scheme, which can introduce perturbations to the stored beam during the injection phase. To address these issues and facilitate stable top-up injection, a Nonlinear In-vacuum Kicker (NIK) has …

Failure Mechanism and Unified Endurance Model of Embedded MRAM Towards Cache Application

Y. H. Chen, Y. S. Chen, Y. C. Ong, Yun-Liang Chu et autres

Magnetic random-access memory (MRAM) shows great promise as an embedded working memory solution for data-intensive high-performance computing (HPC) and artificial intelligence (AI) applications. It requires not only high speed but also exceptional endurance performance. In this study, we discovered that current impact …

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Pulsed Wire Magnetic-Field Measurement System on Permanent Magnet Quadrupoles

Chih‐Wei Chen, Chung-Ting Chang, Hsiung Chen, Yun-Liang Chu et autres

The adjustable strength permanent magnet quadrupoles used in this study were designed and manufactured at the National Synchrotron Radiation Research Center (NSRRC). The permanent magnet quadrupole had a bore radius of 3.5 mm and an effective length of 50 mm. It was …

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Development of an undulator with adjustable horizontal gap and with electromagnet and permanent magnet for rapid polarization switching

Ting-Yi Chung, Huihuang Chen, Yun-Liang Chu, Hsiung Chen et autres

Abstract An undulator composed of an electromagnet (EM) and a permanent magnet (PM) has been developed to switch rapidly the right- or left-circularly polarized radiation. The polarization switching is achieved using the rapid change of polarity of excitation currents in the EM, …

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Integrate a high precision scan magnet power supply in NSRRC

Jhao-Cyuan Huang, Yongseng Wong, Kuo-Bin Liu, Jyh-Chyuan Jan et autres

Abstract This work describes the integration of a high precision power supply in a scan magnet in National Synchrotron Radiation Research Center (NSRRC). Horizontal and vertical energy transmission to the scan magnet are independent. The high precision and sinewave are utilised to …

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A Temperature-Dependent Calibration of Hall Probes for CPMU

Chih‐Wei Chen, Yang-Yang Hsu, Yun-Liang Chu, Hsiung Chen et autres

A cryogenic permanent-magnet undulator (CPMU) with period 18 mm and magnetic length 2 m is being constructed for Taiwan Photon Source. The CPMU (gap 5.5 mm) can generate effective magnetic field 1.18 T at magnetic arrays temperature of 170K. When the field …

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Feasibility Study of Using Multipole Injection Kicker (MIK) and Sextupole for TPS Injection

Che-Kai Chan, Chin-Chun Chang, Ho-Ping Chang, Yung-Sen Cheng et autres

Feasibility of applying MIK/sextupole injection at TPS is evaluated in this study. This study adopts layout similar to MAX IV injection scheme and their collaboration project with SOLEIL for MIK. Although the light source service fulfills present user needs, yet the increasing …

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High-bandwidth magnet power supply for iron core corrector in Taiwan Photon Source

Jui-Che Huang, Yongseng Wong, K.-B. Liu, C.-Y. Liu et autres

Taiwan Photon Source (TPS) has been operated for 6 years, and the mean time between fails has reached world-class standards since the first light was delivered on 31 December 2013. To maintain satisfactory research facilities, all subsystems are constantly updating their equipment. …

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Field Measurements of a Cryogenic Permanent Magnet Undulator at the TPS

Chin-Kang Yang, Jui-Che Huang, Chih‐Sheng Yang, Chih‐Wei Chen et autres

A PrFeB-based cryogenic permanent-magnet undulator (CPMU) with a period length of 15 mm (CU15) is being constructed to provide high brilliant X-rays for the Taiwan Photon Source (TPS) nano-probe beamline. Field measurements of this undulator will be performed with a Hall probe …

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Design of Cone Magnets and Shielding to Align and Calibrate Hall Probe Measurement System

Yun-Liang Chu, Ting-Yi Chung, Chih‐Sheng Yang, Chin-Kang Yang et autres

To measure the magnetic fields with a Hall probe, accurate alignment needs to be considered. Therefore, we present improvements to the Hall probe measurement system, including cone magnets and a zero-field shield as simulated by the OPERA. The design of the cone …

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A Hall Probe Calibration System at Low Temperature for the TPS Cryogenic Permanent Magnet Undulator

Chin-Kang Yang, Wen‐Hsuan Hsieh, Yun-Liang Chu, C. H. Chang et autres

A cryogenic permanent-magnet undulator (CPMU) with a 15-mm period length is being constructed for the TPS. Field measurements of this undulator will be performed with a Hall probe at cryogenic temperatures, for which a field strength and temperature-dependent calibration system is necessary. …

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