IPAC2013 - List of Authors (Yin, L.)

Paper	Title	Page
MOPEA045	Performance Optimization and Upgrade of the SSRF Storage Ring	178
	Z.T. Zhao, B.C. Jiang, Y.B. Leng, S.Q. Tian, L. Yin, W.Z. Zhang SINAP, Shanghai, People's Republic of China
	The SSRF storage ring achieved its design performance goal in 2008, in the following years its performance was optimized and improved, including implementing top-up operation and low emittance lattice configuration as well as other attempts like fast orbit feedback and low alpha mode. In order to meet the requirements of accommodating more beamlines and high demanding performance in its phase-II beamline project, the SSRF storage ring is being upgraded with a design based on superbend based lattice and a third harmonic RF cavity system. This paper presents the main optimization works and the upgrade design considerations on the SSRF storage ring performance.

MOPEA075	Completion of the Brightness Upgrade of the ALS	261
	C. Steier, B.J. Bailey, K. Berg, A. Biocca, A.T. Black, P.W. Casey, D. Colomb, R.F. Gunion, N. Li, A. Madur, S. Marks, H. Nishimura, G.C. Pappas, K.V. Petermann, G.J. Portmann, S. Prestemon, A.W. Rawlins, D. Robin, S.L. Rossi, T. Scarvie, D. Schlueter, C. Sun, H. Tarawneh, W. Wan, E.C. Williams LBNL, Berkeley, California, USA C. Chen, J. Jin, Y.M. Wen, J. Wu, L. Yin, J.D. Zhang, Q.G. Zhou SINAP, Shanghai, People's Republic of China
	Funding: The Advanced Light Source is supported by the Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. The Advanced Light Source (ALS) at Berkeley Lab remains one of the brightest sources for soft x-rays worldwide. A multiyear upgrade of the ALS is underway, which includes new and replacement x-ray beamlines, a replacement of many of the original insertion devices and many upgrades to the accelerator. The accelerator upgrade that affects the ALS performance most directly is the ALS brightness upgrade, which reduced the horizontal emittance from 6.3 to 2.0 nm (2.5 nm effective). Magnets for this upgrade were installed starting in 2012 followed by a transition to user operations with 2.0 nm emittance in spring 2013.

WEPWA029	Undulator Chamber R&D for SXFEL	2193
	X. Hu, L. Yin SINAP, Shanghai, People's Republic of China
	The upcoming construction of Shanghai Soft X-ray Free Electron Laser Facility (SXFEL) will use 18 m small gap undulators. Each undulator is 3 meters long and will work at a minimum gap of 9 mm. This requires a vacuum chamber with an outer height of 8 mm and an elliptic inner aperture. The pressure inside of the chamber shall be less than 10^-5 Pa for the beam operation. An oxygen-free copper vacuum chamber was designed and a prototype was developed. This chamber includes three parts, a copper pipe manufactured by stretching, two flanges made of clad metal and a set of supports. The main fabrication procedure and the test results for the chamber prototype are described in this paper.

THPME023	A NEW HARMONIC COIL BENCH AT SINAP FOR THE ALS COMBINED FUNCTION SEXTUPOLE MAGNETS	3552
	J.D. Zhang, H.W. Du, L. Yin, Q.G. Zhou SINAP, Shanghai, People's Republic of China N. Li, A. Madur LBNL, Berkeley, California, USA
	A new harmonic coil bench has been developed at Shanghai Institute of Applied Physics (SINAP) to measure the ALS combined function sextupole magnets. The measurement system has been designed with the aim to perform precise, fast and reliable measurements of series of magnets. It determines the strength, and the multipole content of the field as well as the magnetic axis for precise positioning of alignment targets on top of the multipoles. The multipole, while supported on a marble platform, can be moved with regard to the rotating coil using multi-dimensional adjustment plate. The resolution of the movement is read out by micrometer with a few μm resolutions. This article introduces the measurement system constitutes.

THPME046	A Summary of the Quality of the ALS Combined Function Sextupole Magnets	3615
	N. Li, A. Madur LBNL, Berkeley, California, USA C. Chen, H.J. Hu, J. Jin, Y.M. Wen, L. Yin, J.D. Zhang, Q.G. Zhou SINAP, Shanghai, People's Republic of China
	Funding: This work was supported by the Office of Science, U.S. Department of Energy under DOE contract number DE-AC02-05CH11231. A total of 51 combined function magnets is required to upgrade the Advanced Light Source (ALS) Storage Ring at LBNL. These magnets will provide 4 types of magnetic fields: sextupole, horizontal and vertical dipoles, and skew quadrupole and will enable an emittance reduction and upgrade of the beam quality in the ALS ring. A relatively new procedure using EDM cut poles after core assembly that was first used by Buckley System Ltd, NZ was adopted during the production of these magnets. Also, a new 3D CAD modeling was used for the coil design. A total of 57 magnets (including prototypes and spare magnets) were built by the Shanghai Institute of Applied Physics (SINAP) in China. These magnets have achieved extraordinarily high pole profile accuracies and exhibit excellent coil performance characteristics: resistances and water flows reached a high degree of consistency. Consequently, the system errors of the magnetic field of these magnets all meet the LBNL specifications. This paper will summarize the mechanical quality and magnetic field properties of these magnets. The interrelationship between the qualities of coil and the magnet field will be described as well.

Paper

Title

Page

Performance Optimization and Upgrade of the SSRF Storage Ring

178

Z.T. Zhao, B.C. Jiang, Y.B. Leng, S.Q. Tian, L. Yin, W.Z. Zhang
SINAP, Shanghai, People's Republic of China

The SSRF storage ring achieved its design performance goal in 2008, in the following years its performance was optimized and improved, including implementing top-up operation and low emittance lattice configuration as well as other attempts like fast orbit feedback and low alpha mode. In order to meet the requirements of accommodating more beamlines and high demanding performance in its phase-II beamline project, the SSRF storage ring is being upgraded with a design based on superbend based lattice and a third harmonic RF cavity system. This paper presents the main optimization works and the upgrade design considerations on the SSRF storage ring performance.

MOPEA075

Completion of the Brightness Upgrade of the ALS

261

C. Steier, B.J. Bailey, K. Berg, A. Biocca, A.T. Black, P.W. Casey, D. Colomb, R.F. Gunion, N. Li, A. Madur, S. Marks, H. Nishimura, G.C. Pappas, K.V. Petermann, G.J. Portmann, S. Prestemon, A.W. Rawlins, D. Robin, S.L. Rossi, T. Scarvie, D. Schlueter, C. Sun, H. Tarawneh, W. Wan, E.C. Williams
LBNL, Berkeley, California, USA
C. Chen, J. Jin, Y.M. Wen, J. Wu, L. Yin, J.D. Zhang, Q.G. Zhou
SINAP, Shanghai, People's Republic of China

Funding: The Advanced Light Source is supported by the Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.
The Advanced Light Source (ALS) at Berkeley Lab remains one of the brightest sources for soft x-rays worldwide. A multiyear upgrade of the ALS is underway, which includes new and replacement x-ray beamlines, a replacement of many of the original insertion devices and many upgrades to the accelerator. The accelerator upgrade that affects the ALS performance most directly is the ALS brightness upgrade, which reduced the horizontal emittance from 6.3 to 2.0 nm (2.5 nm effective). Magnets for this upgrade were installed starting in 2012 followed by a transition to user operations with 2.0 nm emittance in spring 2013.

WEPWA029

Undulator Chamber R&D for SXFEL

2193

X. Hu, L. Yin
SINAP, Shanghai, People's Republic of China

The upcoming construction of Shanghai Soft X-ray Free Electron Laser Facility (SXFEL) will use 18 m small gap undulators. Each undulator is 3 meters long and will work at a minimum gap of 9 mm. This requires a vacuum chamber with an outer height of 8 mm and an elliptic inner aperture. The pressure inside of the chamber shall be less than 10^-5 Pa for the beam operation. An oxygen-free copper vacuum chamber was designed and a prototype was developed. This chamber includes three parts, a copper pipe manufactured by stretching, two flanges made of clad metal and a set of supports. The main fabrication procedure and the test results for the chamber prototype are described in this paper.

THPME023

A NEW HARMONIC COIL BENCH AT SINAP FOR THE ALS COMBINED FUNCTION SEXTUPOLE MAGNETS

3552

J.D. Zhang, H.W. Du, L. Yin, Q.G. Zhou
SINAP, Shanghai, People's Republic of China
N. Li, A. Madur
LBNL, Berkeley, California, USA

A new harmonic coil bench has been developed at Shanghai Institute of Applied Physics (SINAP) to measure the ALS combined function sextupole magnets. The measurement system has been designed with the aim to perform precise, fast and reliable measurements of series of magnets. It determines the strength, and the multipole content of the field as well as the magnetic axis for precise positioning of alignment targets on top of the multipoles. The multipole, while supported on a marble platform, can be moved with regard to the rotating coil using multi-dimensional adjustment plate. The resolution of the movement is read out by micrometer with a few μm resolutions. This article introduces the measurement system constitutes.

THPME046

A Summary of the Quality of the ALS Combined Function Sextupole Magnets

3615

N. Li, A. Madur
LBNL, Berkeley, California, USA
C. Chen, H.J. Hu, J. Jin, Y.M. Wen, L. Yin, J.D. Zhang, Q.G. Zhou
SINAP, Shanghai, People's Republic of China

Funding: This work was supported by the Office of Science, U.S. Department of Energy under DOE contract number DE-AC02-05CH11231.
A total of 51 combined function magnets is required to upgrade the Advanced Light Source (ALS) Storage Ring at LBNL. These magnets will provide 4 types of magnetic fields: sextupole, horizontal and vertical dipoles, and skew quadrupole and will enable an emittance reduction and upgrade of the beam quality in the ALS ring. A relatively new procedure using EDM cut poles after core assembly that was first used by Buckley System Ltd, NZ was adopted during the production of these magnets. Also, a new 3D CAD modeling was used for the coil design. A total of 57 magnets (including prototypes and spare magnets) were built by the Shanghai Institute of Applied Physics (SINAP) in China. These magnets have achieved extraordinarily high pole profile accuracies and exhibit excellent coil performance characteristics: resistances and water flows reached a high degree of consistency. Consequently, the system errors of the magnetic field of these magnets all meet the LBNL specifications. This paper will summarize the mechanical quality and magnetic field properties of these magnets. The interrelationship between the qualities of coil and the magnet field will be described as well.