Progress in vacuum system design for Thailand's new light source

IF 3.9 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Vacuum Pub Date : 2025-04-01 Epub Date: 2025-02-05 DOI:10.1016/j.vacuum.2025.114111

Thanapong Phimsen, Supan Boonsuya, Sarawut Chitthaisong, Sireegorn Sumklang, Orayanee Seegauncha, Narongsak Sonsuphap, Prapaiwan Sunwong, Supachai Prawanta, Siriwan Jummunt, Porntip Sudmuang, Prapong Klysubun

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Abstract

The vacuum system of Siam Photon Source II (SPS-II), Thailand's first fourth-generation light source, is positioned to significantly enhance the country's local manufacturing capabilities and strengthen the Thai industrial community through technology transfer by domestically fabricating most of the main components in the system. Utilizing existing Thai expertise, conventional pumping technology is chosen. However, Design adaptations are needed to overcome the challenges posed by the dense Double-Triple Bend Achromat (DTBA) magnet lattice with limited aperture. Strategic positioning of pumps is required to achieve optimal pumping efficiency. Lump pumps are being strategically distributed throughout system. A combined approach is employed for pressure profile evaluation, using 1D iteration for the overall pressure profile with conductance values calculated from 3D Molflow + simulation, enabling optimization of the pump distribution strategy. To minimize cost and impedance, bellows are eliminated between chambers in both upstream and downstream arc sections. Finite element analysis is ongoing to ensure the modified design can withstand operational stresses. The paper concludes by outlining the overall progress and future plans for the SPS-II vacuum system design.

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泰国新光源真空系统设计进展

暹罗光子源II （SPS-II）真空系统是泰国首个第四代光源，其定位是通过国内制造系统中的大部分主要部件的技术转让，显著提高该国的本地制造能力，并加强泰国工业界。利用泰国现有的专业知识，选择了传统的泵送技术。然而，需要进行设计调整以克服具有有限孔径的致密双-三弯消色差（DTBA）磁铁晶格所带来的挑战。为了达到最佳的泵送效率，需要对泵进行战略定位。泵泵被战略性地分布在整个系统中。压力剖面评估采用了一种组合方法，对整体压力剖面进行一维迭代，并通过Molflow + 3D模拟计算电导值，从而优化泵的分配策略。为了最大限度地降低成本和阻抗，在上游和下游电弧段的腔室之间都消除了波纹管。目前正在进行有限元分析，以确保修改后的设计能够承受工作应力。论文最后概述了SPS-II真空系统设计的总体进展和未来规划。

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来源期刊

Vacuum 工程技术-材料科学：综合

CiteScore

6.80

自引率

17.50%

发文量

审稿时长

34 days

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.