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The cryopump system of the QQDDQ magnet spectrometer BIG KARL

  • Cryopumps without liquid nitrogen shielding are used to provide a vacuum of 10−6 torr in the spectrometer. The vacuum system is subdivided in three sections that can be separated by valves. The first section (scattering chamber) has a volume of 60 l, two rotation transmissions with 35 cm dia and a sliding seal that allows a rotation of 160° without deteriorating the vacuum. The second section includes the vacuum chambers inside the magnets with 6 × 80 cm cross-section and a length of 1200 cm. The third section (detector box) has a volume of 4300 l and contains a moveable detector system. The gas inside the detector with a pressure of 760 torr is separated from the vacuum by a 15 μm mylar foil with an area of 300 cm2. The detector box can be valved off by a valve with the dimension of 10 × 100 cm. The layout of system is given. The instrumentation and the interlock system are described. First experiences with this system are presented.

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Metadaten
Author:Arno Hardt, S. Martin, J. Meißburger, R. Retz, J. Wimmer
DOI:https://doi.org/10.1016/S0042-207X(78)80026-8
ISSN:1879-2715 (E-Journal); 0042-207X (Print)
Parent Title (English):Vacuum
Publisher:Elsevier
Place of publication:Amsterdam
Document Type:Article
Language:English
Year of Completion:1978
Date of the Publication (Server):2013/07/03
Volume:28
Issue:10-11
First Page:483
Link:https://doi.org/10.1016/S0042-207X(78)80026-8
Zugriffsart:campus
Institutes:FH Aachen / Fachbereich Energietechnik
collections:Verlag / Elsevier