Author: Duller, G.M.A.
Paper Title Page
WEOAM02 A Vacuum Aspirated Cryo Cooling System (VACCS) 121
 
  • G.M.A. Duller, D.L. Magrath, M. Nagy, B. Olafsson
    DLS, Oxfordshire, United Kingdom
 
  The use of liquid nitrogen for cooling of synchrotron equipment is widespread. The cryogenic sub-coolers commonly employed come with some significant drawbacks such as cost, complexity, stiffness of distribution lines, and vibration induced by pressure variations. The typical sub-cooler is capable of handling 2-3kW of absorbed power whilst many optics require no more than 50-150W of cooling. We present a Vacuum Aspirated Cryo-cooling System (VACCS) which overcomes many of these disadvantages and which allows cryo-cooling to be implemented more widely. The VACCS system uses a vacuum, generated with no moving parts, to draw LN2 through a heat exchanger. Thus the system does not have to be pressure rated. We describe our designs for highly flexible distribution lines. A simple control system offers variable temperature at the heat exchanger by varying the flowrate of LN2. A system is installed at Diamond which allows the independent control of three zones. A test rig has demonstrated cooling capacity in excess of 100W for a monochromator crystal assembly and controlled temperatures -194¿-120C.  
slides icon Slides WEOAM02 [21.578 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEOAM02  
About • Received ※ 31 October 2023 — Revised ※ 27 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 08 January 2024
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