Paper |
Title |
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THPTS045 |
Preparation of Titanum-Zirconium-Vanadium Films by Quantitative Deposition |
4210 |
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- J.Q. Shao, C. Chen, X.Q. Ge, W. Li, S. Wang, Y. Wang, W. Wei, B. Zhang, Y.X. Zhang, B.L. Zhu
USTC/NSRL, Hefei, Anhui, People’s Republic of China
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TiZrV has been used in vacuum technology and electric vacuum devices due to its high pumping speed and low activation temperature in recent years. At the same time, many preparation methods have been developed. Different from the current coating method of magnetron sputtering, this paper discusses the preparation of thin film coating from the viewpoint of vacuum sintering, which is flexible in design and more suitable for operation. Based on the analysis of the surface morphology of the sintered film, the feasibility and operability of the experimental method were explored from the surface compactness of the getter.
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS045
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About • |
paper received ※ 25 April 2019 paper accepted ※ 22 May 2019 issue date ※ 21 June 2019 |
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THPTS046 |
The Limited B-Field Integral of Superconducting Longitudinal Gradient Bend Magnet |
4213 |
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- C. Chen, L. Wang, H.R. Zhang, T. Zhang
USTC/NSRL, Hefei, Anhui, People’s Republic of China
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The National Synchrotron Radiation Laboratory (NSRL) is planning a fourth generation diffraction-limited light source–Hefei Advanced Light Source (HALS), it is based on a seven-bend achromat lattice providing an ultralow natural emittance of 34 pm rad. The emittance can be even lower with the use of longitudinal gradient bends (LGBs) and anti-bends (ABs). The designed energy for HALS is 2.4 GeV, superconducting LGB might be employed instead of normal bending magnet since it can improve radiated beam critical energy to hard x-ray regions without using up any straight sections. To get a peak field about 6 T and small B-field profile full width half maximum, SLS-2 type LGB is considered. In this paper, the limited B-field integral (along the beam path) is trying to be find with some restrictions.
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS046
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About • |
paper received ※ 12 May 2019 paper accepted ※ 21 May 2019 issue date ※ 21 June 2019 |
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THPTS048 |
Design of Longitudinal Gradient Bending Magnet of HALS |
4215 |
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- B. Zhang, C. Chen, Z.L. Ren, X.Q. Wang, H. Xu
USTC/NSRL, Hefei, Anhui, People’s Republic of China
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Hefei Advanced Light Source (HALS) is a diffraction limited light source, which was proposed and expected to be built in the next few years by National Synchrotron Radiation Laboratory (NSRL) of China. Just like other new light sources, longitudinal gradient bending magnet (LGB) will be adopted to suppress the beam emittance. The magnet consists of 7 modules with different magnet-ic field. Each module has yoke and poles with the same size but different amount of permanent magnet to gener-ate field gradient. FeNi alloy is used to shunt magnetic flux and thus improve the temperature stability. Correc-tor coil or movable wedge can be used to adjust the field. Impact of magnetization direction error of permanent magnet block and parallelism error of poles on multi-poles is also evaluated.
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS048
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|
About • |
paper received ※ 14 May 2019 paper accepted ※ 23 May 2019 issue date ※ 21 June 2019 |
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