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Conceptual design of the Diamond-II vacuum system

DOI: 10.18429/JACoW-IPAC2019-TUPMP050 DOI Help

Authors: M. P. Cox (Diamond Light Source) , C. Burrows (Diamond Light Source) , A. G. Day (Diamond Light Source) , J. A. Dymoke-Bradshaw (Diamond Light Source) , R. K. Grant (Diamond Light Source) , N. P. Hammond (Diamond Light Source) , X. Liu (Diamond Light Source) , A. G. Miller (Diamond Light Source) , H. S. Shiers (Diamond Light Source) , Neil Warner (Diamond Light Source)
Co-authored by industrial partner: No

Type: Conference Paper
Conference: IPAC2019
Peer Reviewed: No

State: Published (Approved)
Published: June 2019

Open Access Open Access

Abstract: The conceptual design of the vacuum system for the Diamond-II storage ring upgrade is described. Due to the small vessel cross section, typically 20 mm inside diameter (ID), and the consequent conductance limitation, distributed pumping is provided by non-evaporable getter (NEG) coating supplemented by ion pumps at high gas load locations. In-situ bakeout is incorporated to allow rapid recovery from both planned vacuum interventions and unplanned vacuum events. The vacuum vessels are constructed mainly from copper alloy while stainless steel is used in regions of AC magnets requiring low electrical conductivity. The proposed layout, engineering and build sequence of the vacuum system are described along with gas flow simulations confirming the vacuum performance advantages of NEG-coated vessels compared with uncoated vessels.

Subject Areas: Engineering

Technical Areas: Vacuum

Added On: 24/07/2019 14:27


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Engineering & Technology

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