IPAC2014 - List of Authors (Chu, Y.L.)

Paper	Title	Page
TUPRO108	Design and Performance of the TPS DC Septum Magnet	1301
	C.S. Yang, C.-H. Chang, Y.L. Chu, T.Y. Chung, C.-S. Hwang, F.-Y. Lin NSRRC, Hsinchu, Taiwan
	To decrease the loading on an AC septum magnet, a DC septum magnet was fabricated and applied to the extraction system of the booster ring at Taiwan Photon Source (TPS). The minimal gap is 16.44 mm; the core length is 800 mm and the pole width is 45 mm. The maximum peak field of the DC septum magnet is designed to be 0.95 T at 12 kA with 24-turn coils. The maximum bending angle of the electron beam passing through the septum magnet is 75.5 mrad. Because the electron beam would be perturbed by the leakage field from the septum magnet, shielding between the septum magnet and the booster ring is an important issue for the operation of the beam. Here we report the shielding method with two materials of the DC septum magnet, and discuss the field mapping and shielding from the leakage field.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-TUPRO108
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TUPRO111	Summary of Field Quality of TPS Lattice Magnets	1310
	J.C. Jan, C.-H. Chang, Y.L. Chu, T.Y. Chung, C.-S. Hwang, C.Y. Kuo, F.-Y. Lin, Y.T. Yu NSRRC, Hsinchu, Taiwan
	A modern 3-GeV synchrotron radiation light source is under construction in NSRRC, named Taiwan Photon Source (TPS). Great quality of magnets is required to control the electron-beam in the required orbit in the storage ring (SR) and the booster ring (BR) of TPS. The mechanical and magnet field performance of these magnets were fully inspected in NSRRC. The standard deviation of the integral field strength of 48 SR-dipole magnets is better than 0.1%. The integral multipoles and offsets of the magnetic center of the 240 SR quadrupole and 168 SR sextupole magnets conform to strict specifications. The field characteristics of the BR combined-function dipole magnet were analyzed with an average of processing raw data. The standard deviation of the field strength of 54 BR dipole-magnets is better than 0.2%. The field quality of 36 BR pure quadrupole and 48 BR combined-function quadrupole magnets are accepted to meet the requirement of the booster ring. The field strength and multipole errors of 24 BR sextupole magnets were also examined. The detailed magnetic performance and technical issues of lattice magnets are discussed in this report.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-TUPRO111
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WEPRO013	Design Modifications and Installation of the Injection Girder System in the Taiwan Photon Source	1968
	K.H. Hsu, J.-R. Chen, Y.L. Chu, H.C. Ho, D.-G. Huang, W.Y. Lai, C.J. Lin, Y.-H. Liu, H.M. Luo, S.Y. Perng, P.L. Sung, T.C. Tseng, H.S. Wang, M.H. Wu NSRRC, Hsinchu, Taiwan J.-R. Chen National Tsing Hua University, Hsinchu, Taiwan
	The prototype of TPS injection girder system was designed and installed in a temporary factory. As the leakage field of the kicker magnet in the prototype was found to be too large according to both simulation and measurement to be acceptable, the lattice was altered to fit the requirements. In this paper, we present the design modifications of the injection girder system due to the new lattice. The DC septum magnet is replaced by a pre-AC septum magnet, of which its adjustable stage must be redesigned. The positions of vacuum components in the injection girder are also altered; we add some new holes in the prototype girder. The prototype of an injection girder system after modification has been installed in the tunnel of Taiwan Photon Source. The accuracy of position of three girders installed, and the stages for the septum or kicker magnet are within 0.25 and 0.08 mm, respectively.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEPRO013
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Paper

Title

Page

Design and Performance of the TPS DC Septum Magnet

1301

C.S. Yang, C.-H. Chang, Y.L. Chu, T.Y. Chung, C.-S. Hwang, F.-Y. Lin
NSRRC, Hsinchu, Taiwan

To decrease the loading on an AC septum magnet, a DC septum magnet was fabricated and applied to the extraction system of the booster ring at Taiwan Photon Source (TPS). The minimal gap is 16.44 mm; the core length is 800 mm and the pole width is 45 mm. The maximum peak field of the DC septum magnet is designed to be 0.95 T at 12 kA with 24-turn coils. The maximum bending angle of the electron beam passing through the septum magnet is 75.5 mrad. Because the electron beam would be perturbed by the leakage field from the septum magnet, shielding between the septum magnet and the booster ring is an important issue for the operation of the beam. Here we report the shielding method with two materials of the DC septum magnet, and discuss the field mapping and shielding from the leakage field.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-TUPRO108

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TUPRO111

Summary of Field Quality of TPS Lattice Magnets

1310

J.C. Jan, C.-H. Chang, Y.L. Chu, T.Y. Chung, C.-S. Hwang, C.Y. Kuo, F.-Y. Lin, Y.T. Yu
NSRRC, Hsinchu, Taiwan

A modern 3-GeV synchrotron radiation light source is under construction in NSRRC, named Taiwan Photon Source (TPS). Great quality of magnets is required to control the electron-beam in the required orbit in the storage ring (SR) and the booster ring (BR) of TPS. The mechanical and magnet field performance of these magnets were fully inspected in NSRRC. The standard deviation of the integral field strength of 48 SR-dipole magnets is better than 0.1%. The integral multipoles and offsets of the magnetic center of the 240 SR quadrupole and 168 SR sextupole magnets conform to strict specifications. The field characteristics of the BR combined-function dipole magnet were analyzed with an average of processing raw data. The standard deviation of the field strength of 54 BR dipole-magnets is better than 0.2%. The field quality of 36 BR pure quadrupole and 48 BR combined-function quadrupole magnets are accepted to meet the requirement of the booster ring. The field strength and multipole errors of 24 BR sextupole magnets were also examined. The detailed magnetic performance and technical issues of lattice magnets are discussed in this report.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-TUPRO111

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WEPRO013

Design Modifications and Installation of the Injection Girder System in the Taiwan Photon Source

1968

K.H. Hsu, J.-R. Chen, Y.L. Chu, H.C. Ho, D.-G. Huang, W.Y. Lai, C.J. Lin, Y.-H. Liu, H.M. Luo, S.Y. Perng, P.L. Sung, T.C. Tseng, H.S. Wang, M.H. Wu
NSRRC, Hsinchu, Taiwan
J.-R. Chen
National Tsing Hua University, Hsinchu, Taiwan

The prototype of TPS injection girder system was designed and installed in a temporary factory. As the leakage field of the kicker magnet in the prototype was found to be too large according to both simulation and measurement to be acceptable, the lattice was altered to fit the requirements. In this paper, we present the design modifications of the injection girder system due to the new lattice. The DC septum magnet is replaced by a pre-AC septum magnet, of which its adjustable stage must be redesigned. The positions of vacuum components in the injection girder are also altered; we add some new holes in the prototype girder. The prototype of an injection girder system after modification has been installed in the tunnel of Taiwan Photon Source. The accuracy of position of three girders installed, and the stages for the septum or kicker magnet are within 0.25 and 0.08 mm, respectively.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEPRO013

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