{"title":"Development of the nonlinear in-vacuum kicker at Taiwan photon source","authors":"Chin-Chun Chang, Che-Kai Chan, Bo-Ying Chen, Chun-Shien Huang, Chin-Kang Yang, Fu-Yuan Lin, Chyi-Shyan Fang, Ke-Kang Lin, Jing-Hao Kang","doi":"10.1016/j.vacuum.2025.114356","DOIUrl":null,"url":null,"abstract":"<div><div>A nonlinear in-vacuum kicker (NIK) was developed to facilitate beam injection into the Taiwan Photon Source (TPS) storage ring. The system consists of a titanium vacuum chamber that encloses a ceramic support structure, precisely aligning eight copper kicker coils to generate the desired nonlinear magnetic field profile. Experimental measurements show that the profile of the first magnetic integral closely aligns with simulation result. To reduce heating from image currents and minimize magnetic field attenuation, a 5 μm-thick titanium coating was applied to the ceramic surface. Outgassing rate measurements and pressure readings after bake-out and pump activation confirm that the nonlinear in-vacuum kicker meets the ultra-high vacuum (UHV) requirements for TPS storage ring operation.</div></div>","PeriodicalId":23559,"journal":{"name":"Vacuum","volume":"239 ","pages":"Article 114356"},"PeriodicalIF":3.9000,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Vacuum","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0042207X2500346X","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/4/22 0:00:00","PubModel":"Epub","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
A nonlinear in-vacuum kicker (NIK) was developed to facilitate beam injection into the Taiwan Photon Source (TPS) storage ring. The system consists of a titanium vacuum chamber that encloses a ceramic support structure, precisely aligning eight copper kicker coils to generate the desired nonlinear magnetic field profile. Experimental measurements show that the profile of the first magnetic integral closely aligns with simulation result. To reduce heating from image currents and minimize magnetic field attenuation, a 5 μm-thick titanium coating was applied to the ceramic surface. Outgassing rate measurements and pressure readings after bake-out and pump activation confirm that the nonlinear in-vacuum kicker meets the ultra-high vacuum (UHV) requirements for TPS storage ring operation.
期刊介绍：
Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences.
A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below.
The scope of the journal includes:
1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes).
2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis.
3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification.
4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.
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