Paper |
Title |
Page |
MOPAB087 |
Study on Supports System of BPMs for HEPs |
322 |
SUSPSIK077 |
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- Z.Z. Wang, J.S. Cao, J. He, H.Z. Ma, Y.F. Sui, Z. Wang
IHEP, Beijing, People's Republic of China
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The High Energy Photon Source(HEPS), a third generation light source with the energy of 6 GeV, is under constructed at IHEP. It has an ultralow emittance (~50pm.rad) and small beam size, thus the requirement of BPM in precision and resolution is quite high. Independent supports with high degree of mechanical and thermal stability will be employed for some special BPMs, such as the BPMs near the insert devices. The supports should have high eigen-frequencies to minimize the amplification of vibration from the ground. Vibrations information of the ground around the supports also need be estimated, with which FEA (finite element analysis) had be utilized to simulate the performance of the supports. Measurements of vibrational stability of the prototype supports have be done and compared with the simulation.
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB087
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TUPIK067 |
Online Monitoring of the ADS Test Cryostat Cold Mass With WPM |
1848 |
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- H.Y. Zhu
Institute of High Energy Physics (IHEP), People's Republic of China
- L. Dong, L.L. Men, Z. Wang
IHEP, Beijing, People's Republic of China
- B. Li
CSNS, Guangdong Province, People's Republic of China
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Superconducting devices in particle accelerator demand strict operating environment: cryostat with ultra high vacuum and almost absolute zero temperature 2K-4K. This brings a big problem to survey and alignment work: how to preserve the magnets alignment precision in the cryostat, especially after such a big range temperature change. The complicate structure of magnet girder and cryogenic pipes make it difficult to do precise contraction simulation. So wire position monitor (WPM) is designed to measure the device contraction in cryomodule. Accelerator Driven System (ADS) Injector-I is a proton Linac, WPM system was assembled in its first cyomodule TCM. WPM is precisely calibrated, assembled at the same height as magnets. System noise, contraction stability and repeatability are analyzed in detail. Contraction coefficient of girder system is calculated by contraction data and temperature data, the result matches with the thermal coefficient of stainless steel very well. After commissioning, two thermal cycles were recorded, average contraction value was 1.35mm. The commissioning data shows about 0.2mm contraction difference with the same girder structure.
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DOI • |
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※ https://doi.org/10.18429/JACoW-IPAC2017-TUPIK067
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THPVA048 |
Design and Progress on Mechanical & Alignment System for HEPS-TF |
4544 |
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- C. H. Li, S.J. Li, J. Liu, H. Wang, X.L. Wang, Z. Wang, L. Wu
IHEP, Beijing, People's Republic of China
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HEPS is a new generation synchrotron facility with a stringent requirement of very low emmittance. The key technology difficulties are supposed be overcome during the HEPS-TF stage. There are two projects in progress for mechanical and alignment system. One is the development of precision auto-tuning magnet girder, to meet the requirement of beam based alignment in tunnel, the other is the study on vibrating-wire alignment technique to improve alignment accuracy of magnets on a girder. This paper will describe the design and progress of both projects.
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※ https://doi.org/10.18429/JACoW-IPAC2017-THPVA048
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THPVA050 |
Latest Progress of Magnet Girder Prototypes for HEPS-TF |
4551 |
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- H. Wang, C. H. Li, S.J. Li, H. Qu, Z. Wang, L. Wu
IHEP, Beijing, People's Republic of China
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The magnet girder technology is one of the key tech-nologies which should be overcome in the stage of HEPS-TF (Test Facility of High Energy Photon Source). The girder should be beam-based aligned, and must has high adjusting precision and high stability as well. For these issues, two girder systems are designed and developed. This paper will describe the latest progress of the girder prototypes, including structure design updates, control system progress, and processing and assembling of Girder I prototype.
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※ https://doi.org/10.18429/JACoW-IPAC2017-THPVA050
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THPVA051 |
Vibration Study of Magnet Girder of the HEPS-TF |
4554 |
SUSPSIK114 |
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- Z. Wang, C. H. Li, H. Qu, H. Wang
IHEP, Beijing, People's Republic of China
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Abstract: There are stringent requirements on beam stability in the High Energy Photon Source (HEPS). The stability of the magnet girder is an extremely important factor for the beam stability. This paper will discuss the influence of ground vibration to the beam stability. This influence will determine the scope of the vibration magnification of the magnet girder. By improving the stiffness of the magnet girder, the influence will be reduced and the beam stability shall be improved. Besides, the progress of the HEPS-TF girder prototype and the vibration test will be described.
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※ https://doi.org/10.18429/JACoW-IPAC2017-THPVA051
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THPVA052 |
Preliminary Design of Magnet Support System for CEPC |
4557 |
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- H. Wang, H. Qu, J.L. Wang, Z. Wang, N. Zhou
IHEP, Beijing, People's Republic of China
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Magnet support system is important for CEPC. For the 100 km design of CEPC, there will be thousands of mag-nets and their supports in both collider and booster. Espe-cially, the booster ring is above the collider in the space, the magnets are hung by the supports. The goals of mag-net supports are simple and flexible structure, minimizing the magnet deformation, good stability, low cost and so on. This paper will describe the preliminary design of magnet support system, the optimization to minimize the magnet deformation and the topology optimization of the frame structure in booster.
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DOI • |
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※ https://doi.org/10.18429/JACoW-IPAC2017-THPVA052
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THPVA053 |
Design of the Girder Control System for HEPS-TF |
4560 |
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- S.J. Li, C. H. Li, J. Liu, H. Wang, Z. Wang
IHEP, Beijing, People's Republic of China
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To make the alignment become easier, the HEPS-TF (High Energy Photon Source-Test Facility) magnet girder, which is different from the conventional one, is designed to achieve the goal of adjusting the girder's position and orientation online. The control system is one of the key sub-part. This Paper will describe the control system design, especially on the hardware configuration, software programming as well as user interface design.
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※ https://doi.org/10.18429/JACoW-IPAC2017-THPVA053
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