| Paper |
Title |
Page |
| MOPIK087 |
Development of a Tune Knob for the HLS-II Storage Ring |
730 |
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- S.W. Wang, J.Y. Li, W.B. Wu, W. Xu, K. Xuan, X. Zhou
USTC/NSRL, Hefei, Anhui, People's Republic of China
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A tune knob is a useful tool for lattice setup and machine studies in a storage ring. It is used to adjust the transverse tunes with a small impact on the beam dynamics. A global tune knob is designed for the Hefei Light Source (HLS). In the tune knob, the quadrupoles are grouped into four families and are symmetrically adjusted. Methodical Accelerator Design-X (MAD-X) is used to calculate the coefficients of the tune knob and the Accelerator Toolbox (AT) is used to double check the accuracy of the tune knob. The chromaticity is corrected by the sextupoles in the storage ring. This paper reports preliminary simulation results of the tune knob for HLS. The beta function deviations are also studied.
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2017-MOPIK087
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| TUPIK066 |
Beam Loss Simulation and Radiation Shielding for Top-Off Operation of Hefei Light Source |
1845 |
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- X. Zhou, J.Y. Li, J.G. Wang, S.W. Wang, W.B. Wu, W. Xu, K. Xuan, Q.B. Zeng
USTC/NSRL, Hefei, Anhui, People's Republic of China
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The Hefei Light Source (HLS) is undergoing a series of upgrades to prepare for the top-off operation. To ensure radiation safety in the experimental hall under abnormal beam loss, simulations under various system errors in the HLS storage ring are performed to get in-depth understanding of the induced radiation nature. To make the radiation shielding more effective, a beam scraper is used to decrease the aperture opening of the vacuum chamber, and additional shielding is installed around the scraper. Simulation and beam test results are reported in this paper.
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2017-TUPIK066
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| WEPAB063 |
Considerations on Developing a Dedicated Terahertz Light Source Based on the HLS-II Storage Ring |
2716 |
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- S.W. Wang, J.Y. Li, W.B. Wu, W. Xu, K. Xuan, X. Zhou
USTC/NSRL, Hefei, Anhui, People's Republic of China
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There is an increasing interest in generating terahertz radiation for different kinds of researches. A high-power terahertz light source can be realized through coherent synchrotron radiation from a storage ring. The radiation power of coherent synchrotron radiation is proportional to square of the number of electrons in a bunch. To generate coherent synchrotron radiation, the electron bunch length should be shorter than its radiation wavelength. This paper presents our preliminary study on developing a terahertz light source based on Hefei Light Source. We will introduce the status of Hefei Light Source (HLS) and discusses the approach to change it to a dedicated Terahertz light source using coherent synchrotron radiation. Several schemes are proposed to shorten the electron bunch length in the storage ring, including using a low alpha lattice, adopting a magnetic chicane and upgrading the RF system with much higher frequency. The related beam instabilities are also analyzed to predict the beam current threshold.
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2017-WEPAB063
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