Conceptual Design Study for the Vacuum Pumping Systems for a 500 MeV H‾ cyclotron

TRIUMF: Canada's national laboratory for particle and nuclear physics

Conceptual Design Study for the Vacuum Pumping Systems for a 500 MeV H‾ cyclotron Wright Engineers Limited; Arthur D. Little, Inc.; TRIUMF

Abstract

This report of the conceptual design study of the vacuum pumping system for the TRIUMF cyclotron considers two different pumping systems in detail: large trapped oil diffusion pumps, and 20°K cryopumps with auxiliary trapped oil diffusion pumps. The pumping systems are compared in relation to certain criteria. These include an equivalent nitrogen stripping cross-section pressure of 7 x 10- 8 Torr within 15 hours of pumping, minimum contamination of the vacuum chamber, and compatibility with other cyclotron components. Reliability, maintenance and test requirements have received particular attention, since cryopumping has not been widely used as a pumping method for an accelerator. The report contains a discussion of outgassing rate data of materials and an analysis of the gas loads for the cyclotron. Gauging and leak-testing methods for the vacuum chamber and pumping system are described. Estimates of capital and annual operating costs for the two pumping systems are provided, and a construction schedule concludes the report.

Item Metadata

Title	Conceptual Design Study for the Vacuum Pumping Systems for a 500 MeV H‾ cyclotron
Alternate Title	TRIUMF brown reports TRI-69-9
Creator	Wright Engineers Limited; Arthur D. Little, Inc.; TRIUMF
Publisher	TRIUMF
Date Issued	1969-08
Description	This report of the conceptual design study of the vacuum pumping system for the TRIUMF cyclotron considers two different pumping systems in detail: large trapped oil diffusion pumps, and 20°K cryopumps with auxiliary trapped oil diffusion pumps. The pumping systems are compared in relation to certain criteria. These include an equivalent nitrogen stripping cross-section pressure of 7 x 10- 8 Torr within 15 hours of pumping, minimum contamination of the vacuum chamber, and compatibility with other cyclotron components. Reliability, maintenance and test requirements have received particular attention, since cryopumping has not been widely used as a pumping method for an accelerator. The report contains a discussion of outgassing rate data of materials and an analysis of the gas loads for the cyclotron. Gauging and leak-testing methods for the vacuum chamber and pumping system are described. Estimates of capital and annual operating costs for the two pumping systems are provided, and a construction schedule concludes the report.
Genre	Report
Type	Text
Language	eng
Date Available	2025-01-29
Provider	Vancouver : University of British Columbia Library
Rights	Attribution-NonCommercial-NoDerivatives 4.0 International
DOI	10.14288/1.0447863
URI	http://hdl.handle.net/2429/90229
Affiliation	TRIUMF; Non UBC
Peer Review Status	Unreviewed
Scholarly Level	Researcher
Rights URI	http://creativecommons.org/licenses/by-nc-nd/4.0/
Aggregated Source Repository	DSpace

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