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| Journal Article | PreJuSER-7936 |
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2009
World Scientific
Singapore [u.a.]
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Please use a persistent id in citations: doi:10.1142/S0218301309012562
Abstract: Targets of frozen droplets ("pellets") from various liquefiable gases like H-2, D-2, N-2, Ne, Ar, Kr and Xe are very promising for high luminosity experiments with a 4 pi detector geometry at storage-rings. High effective target densities (>10(15) atoms/cm(2)), a small target size (circle divide approximate to 20-30 mu m), a low gas load and a narrow pellet beam are the main advantages of such targets.Pioneering work on pellet targets has been made at Uppsala, Sweden.(1) A next generation target has been built at the IKP of FZJ in collaboration with two institutes (ITEP and MPEI) from Moscow, Russia. It is a prototype for the future pellet target at the PANDA experiment at FAIR/HESR (supported by INTAS 06-1000012-8787, 2007/08) and makes use of a new cooling and liquefaction method, based on cryogenic liquids instead of cooling machines.(2) The main advantages of this method are the vibration-free cooling and the possibility for cryogenic jet production from various gases in a wide range of temperatures. Different regimes of pellet production from H-2, N-2 and Ar have been observed and their parameters have been measured.(3) For the first time, mono-disperse and satellite-free droplet production was achieved for cryogenic liquids from H-2, N-2 and Ar.
Keyword(s): J
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