Bochum 2009 – scientific programme
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HK: Fachverband Hadronen und Kerne
HK 85: Accelerators and Instrumentation II
HK 85.2: Talk
Friday, March 20, 2009, 11:15–11:30, H-ZO 90
Using NEG-pumping near a high density internal target — •Alexander Gruber1, Johann Marton1, Eberhard Widmann1, Johann Zmeskal1, and Herbert Orth2 — 1Stefan Meyer Institut für subatomare Physik, ÖAW — 2GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt
The universal detector PANDA will be constructed at the future high-energy antiproton storage ring HESR at FAIR (Facility for Antiproton and Ion Research, GSI/Darmstadt). It will use antiproton beams (1.5 to 15 GeV/c) for hadron physics in the charmonium region.
The Stefan Meyer Institut (SMI) contributes to major parts of the PANDA detector like the hydrogen cluster-jet target and the vacuum system of the antiproton - target interaction zone.
To ensure low background, the residual gas load in the interaction zone and in the antiproton beam-pipe has to be minimised. Most of the gas load will come from the high density internal hydrogen target. As the detector will cover almost the full solid angle, the installation of pumps near the interaction zone is impossible. Therefore the use of NEG (non-evaporative-getter) coated beam pipes has been considered as an alternative.
Two setups with NEG coated tubes have been installed at SMI as prototypes of the PANDA interaction zone. General parameters of the NEG-film, its outgassing behaviour, the pumping speed and the pumping capacity for hydrogen have been tested.
The results of the studies on the PANDA-interaction region will be presented.