| Paper |
Title |
Page |
| THPMB025 |
The Effect of Magnetic Field on the Secondary Electron Yield in the Ultra-High Vacuum Environment |
3281 |
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- J. Wang, Y. Wang, W. Wei, Y.H. Xu, B. Zhang, T. Zhang, Y.X. Zhang
USTC/NSRL, Hefei, Anhui, People's Republic of China
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A secondary electron emission measurement system has been designed and used to study the secondary electron emission (SEE) of different materials with an independently adjustable energy of 50 eV to 5 keV at National Synchrotron Radiation Laboratory. Here, we obtained the characteristics of the SEE yield from Pd film coatings, under the condition of magnetic field and without magnetic field. Then it was analysed that the effect of magnetic field on the secondary electron yield in the ultra-high vacuum environment. The results show that magnetic field shielding is critical to avoid the influence of magnetic field during secondary electron yield (SEY) measurements.
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| DOI • |
reference for this paper
※ DOI:10.18429/JACoW-IPAC2016-THPMB025
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| THPMB026 |
Research on Low Secondary Electron Yield Materials for Future Accelerators |
3284 |
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- J. Wang, Y. Wang, W. Wei, Y.H. Xu, B. Zhang, T. Zhang, Y.X. Zhang
USTC/NSRL, Hefei, Anhui, People's Republic of China
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For future accelerators, such as SPPC (SEYmax <1.2), the build-up of electron cloud generated in the beam pipes considerably affect the stability of particle beams. Therefore, it is critical to look for steady and low secondary electron yield (SEY) material for future high intensity accelerators.
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| DOI • |
reference for this paper
※ DOI:10.18429/JACoW-IPAC2016-THPMB026
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| THPOY028 |
Operational Status of HLS-II |
4155 |
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- J.Y. Li, G. Huang, W. Wei, W. Xu, K. Xuan, Y.L. Yang, Z.R. Zhou
USTC/NSRL, Hefei, Anhui, People's Republic of China
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After a major renovation, the Hefei light source (HLS), renamed HLSII, was brought into operation in the beginning of 2015. The operational result shows that the HLS-II not only provides much brighter synchrotron radiation beam for various users, but also shows much higher reliability than the old light source. This paper first gives an overview of the HLS-II. The overall performance of the light source is then summarized in this paper. Some measured key parameters of the light source, including emittance, orbit stability, beam lifetime and so on, are also presented.
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| DOI • |
reference for this paper
※ DOI:10.18429/JACoW-IPAC2016-THPOY028
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