Document Type

Conference Paper

Publication Date

2025

DOI

10.18429/JACoW-NAPAC2025-WEP022

Publication Title

Proceedings of the North American Particle Accelerator Conference (NAPAC2025)

Pages

733-736

Conference Name

North American Particle Accelerator Conference (NAPAC2025), August 10-15, 2025, Sacramento, California

Abstract

Two conduction-cooled 915 MHz superconducting radio frequency hermetic assemblies must be safely transported from the Jefferson Lab in Newport News, VA to General Atomics in San Diego, CA for performance testing in a custom horizontal test cryostat. One hermetic assembly consists of a 2-cell 915 MHz cavity, a coaxial fundamental power coupler, and the warm-to-cold transition beam tubes. The second hermetic assembly consists of a 2-cell 915 MHz cavity only. The assemblies will be transported on a flatbed air-ride trailer over the approximate 4000 km distance. Design requirements included adequate attenuation of 4g vertical axis, 5g beamline axis, and 1.5g lateral axis shock events. The isolation system was designed using helical wire-rope isolators with modal and transient finite element analysis performed in Ansys. Results show shock attenuation of a 10 ms half-sine pulse input to < 1g in the vertical axis, < 1.5g in the beamline axis, and < 0.5g in the lateral axis for both assemblies at the specified design loads and all structural stresses are kept below the material yield limits. Additionally, the natural frequencies of both isolation systems adequately attenuate the fundamental modes of the critical structures.

Rights

© 2025 by JACoW publishing.

Content from this work may be used under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) License. Any distribution of this work must maintain attribution to the authors, title of the work, publisher, and DOI.

Comments

This is a scholarly work in press.

As part of a scholarly work in press, the doi to this article, https://doi.org/10.18429/JACoW-NAPAC2025-WEP022, is as of November 2025 non-functional. This may change as the publisher develops a landing page.

Original Publication Citation

Lewis, J., Ciovati, G., Huque, N., Armstrong, J., & Harding, K. (2025). Design of a shipping fixture for a compact cryomodule hermetic assembly. In Tor O. Raubenheimer, Roark A. Marsh, Eric Prebys, Ling Wang, Petr Anisimov, Kip Bishofberger, Gustavo Bruno, Zhichu Chen, Jan Chrin, Kelly Jaje, Jaeyu Lee, Magdalena Montes-Loera, Mary Saethre, Tasha Summers, Kent Wootton (Eds.), Proceedings of the North American Particle Accelerator Conference (NAPAC2025) (pp. 733-736). JACoW Publishing. https://prebys.physics.ucdavis.edu/NAPAC-25/proceedings/pdf/WEP022.pdf

ORCID

0000-0001-9316-7704 (Ciovati)

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