Development of SLA 3D printed volumes for leak testing of LHC Hi-Lumi cryomodules at STFC

IF 3.9 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Vacuum Pub Date : 2025-02-05 DOI:10.1016/j.vacuum.2025.114090

J.O.W. Poynton , S. Wilde , J. Bourne , E. Jordan , N. Templeton , B. Matheson , T. Capelli , A. Seller

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Abstract

Daresbury Laboratory recently completed the build of a Radio Frequency Dipole (RFD) crab cavity cryomodule for the Super Proton Synchrotron (SPS). During the build the team faced challenges leak testing welds which could not be tested in the typical evacuation method. Each cryomodule build requires 34 unique cryogenic and insulation vacuum weld configurations, most of which are repeated across multiple weld sites. Each weld must be qualified inspected and tested (visual and leak) before the build can progress.

A suite of bespoke 3D printed weld test tools and procedures have been developed with major savings to time and cost and improved quality of leak testing tooling, developing a methodology which can be adapted to many different weld configurations. All whilst maintaining a baseline leak rate of <5e-12 mbar L/s at or below 1e-3 mbar. The result was a repeatable and cost-effective means of performing high-accuracy leak tests in a short timescale.

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在STFC开发用于LHC高亮度低温模块泄漏测试的SLA 3D打印体积

达斯伯里实验室最近完成了用于超级质子同步加速器（SPS）的射频偶极子（RFD）蟹腔低温模块的构建。在建造过程中，团队面临着测试焊缝泄漏的挑战，这在典型的疏散方法中是无法测试的。每个低温模组需要34种独特的低温和绝缘真空焊接配置，其中大多数在多个焊接点重复进行。在施工进行之前，每个焊缝必须经过合格的检查和测试（视觉和泄漏）。一套定制的3D打印焊接测试工具和程序已经开发出来，大大节省了时间和成本，提高了泄漏测试工具的质量，开发了一种可以适应许多不同焊接配置的方法。同时在1e- 3mbar或以下保持5e- 12mbar /s的基准泄漏率。结果是在短时间内进行高精度泄漏测试的可重复且经济高效的方法。

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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.