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No abstract available
Journal
Verhandlungen der Deutschen Physikalischen Gesellschaft; ISSN 0420-0195; 
; CODEN VDPEAZ; v. 39(1); p. 79
; CODEN VDPEAZ; v. 39(1); p. 79
No abstract available
Journal
Verhandlungen der Deutschen Physikalischen Gesellschaft; ISSN 0420-0195; ; CODEN VDPEAZ; v. 40(4); p. 95
; CODEN VDPEAZ; v. 40(4); p. 95
[en] Targets of frozen droplets (''pellets'') from various liquefiable gases like H2, D2, N2, Ne, Ar, Kr and Xe are very promising for high luminosity experiments in a 4π detector geometry at storage-rings. High effective target densities (> 1015 atoms/cm2), a small target size (diameter ∼ 20 - 30μm) and a narrow pellet beam are the main advantages of such targets. A target has been under construction at the IKP of FZJ in collaboration with two institutes from Moscow, Russia. It is developed as a prototype for the future pellet target at the PANDA experiment at FAIR/HESR. This target uses liquid nitrogen and cold evaporated helium gas for cooling. The automatically refilled baths with liquid nitrogen and liquid helium are located inside the target cryostat. The main advantages of this method are the vibration-free cooling and the possibility for liquid cryogenic jet production from various gases in a wide range of temperatures. Different regimes of pellet production from H2 and N2 have been observed and their parameters have been measured during the tests. (orig.)
Journal
Verhandlungen der Deutschen Physikalischen Gesellschaft; ISSN 0420-0195; ; CODEN VDPEAZ; v. 42(2); [1 p.]
; CODEN VDPEAZ; v. 42(2); [1 p.]
No abstract available
Source
Baur, G.; Buescher, M.; Filges, D.; Kilian, K.; Maier, R.; Rossen, P. von; Speth, J.; Stroeher, H. (Forschungszentrum Juelich GmbH (Germany). Inst. fuer Kernphysik); Freiesleben, H. (Technische Univ. Dresden (Germany)) (eds.); Forschungszentrum Juelich GmbH (Germany). Inst. fuer Kernphysik; Forschungszentrum Juelich GmbH (Germany). COSY Research; 313 p; ISSN 0944-2952; ; Mar 2002; p. 71; Available from TIB Hannover: RA 831(3978)
; Mar 2002; p. 71; Available from TIB Hannover: RA 831(3978)
No abstract available
Journal
Verhandlungen der Deutschen Physikalischen Gesellschaft; ISSN 0420-0195; ; CODEN VDPEAZ; v. 37(3); p. 40
; CODEN VDPEAZ; v. 37(3); p. 40
[en] Frozen-pellet targets promise to be ideally suited for high luminosity storage-ring experiments with a 4π-detector geometry. Such a target has been set up at the FZJ by a group from ITEP and MPEI. It comprises a vibration-free cooling system based on liquid nitrogen and helium and, thus, allows one to use various liquefiable gases like H2, D2, N2, Ne, Ar, Kr and Xe as target material. During several test runs, stable production of pellets with diameters down to ∼20 μm has been achieved. Their spatial distributions and angular spreads have been determined with the help of fast CCD cameras and the pellet size and frequency stabilities have been measured. (author)
Source
Reis, Alberto; Goebel, Carla; Borges, Jose de Sa; Magnin, Javier (eds.); 780 p; ISBN 0-7354-0307-4; ; 2005; p. 614-617; 11. International conference on hadron spectroscopy; Rio de Janeiro, RJ (Brazil); 21-26 Aug 2005; 1 ref., 4 figs., 1 tab.
; 2005; p. 614-617; 11. International conference on hadron spectroscopy; Rio de Janeiro, RJ (Brazil); 21-26 Aug 2005; 1 ref., 4 figs., 1 tab.
No abstract available
Source
Baur, G.; Buescher, M.; Filges, D.; Kilian, K.; Maier, R.; Rossen, P. von; Speth, J.; Stroeher, H. (Forschungszentrum Juelich GmbH (Germany). Inst. fuer Kernphysik); Freiesleben, H. (Technische Univ. Dresden (Germany)) (eds.); Forschungszentrum Juelich GmbH (Germany). Inst. fuer Kernphysik; Forschungszentrum Juelich GmbH (Germany). COSY Research; 313 p; ISSN 0944-2952; ; Mar 2002; p. 72; Available from TIB Hannover: RA 831(3978)
; Mar 2002; p. 72; Available from TIB Hannover: RA 831(3978)
[en] Targets of frozen droplets ("pellets") from various liquefiable gases like H2, D2, N2, Ne, Ar, Kr and Xe are very promising for high luminosity experiments with a 4π detector geometry at storage-rings. High effective target densities (> 1015atoms/cm2), a small target size (⊘ ≈ 20–30 μm), 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. 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. 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 H2, N2 and Ar have been observed and their parameters have been measured. For the first time, mono-disperse and satellite-free droplet production was achieved for cryogenic liquids from H2, N2 and Ar. (author)
Journal
International Journal of Modern Physics E; ISSN 0218-3013; ; v. 18(2); p. 505-510
; v. 18(2); p. 505-510
No abstract available
Source
Buescher, M.; Hanhart, C.; Krewald, S.; Machner, H.; Maier, R.; Meissner, U.G.; Ritman, J.; Stockhorst, H.; Stroeher, H. (eds.); Forschungszentrum Juelich GmbH (Germany). Inst. fuer Kernphysik / COSY; 186 p; ISSN 0944-2952; ; Mar 2008; p. 139
; Mar 2008; p. 139
[en] Frozen-pellet targets promise to be ideally suited for high luminosity storage-ring experiments with a 4π-detector geometry. Such a target has been set up at the FZJ by a group from ITEP and MPEI. It comprises a vibration-free cooling system based on liquid nitrogen and helium and, thus, allows one to use various liquefiable gases like H2, D2, N2, Ne, Ar, Kr and Xe as target material.During several test runs, stable production of pellets with diameters down to ∼20 μm has been achieved. Their spatial distributions and angular spreads have been determined with the help of fast CCD cameras and the pellet size and frequency stabilities have been measured
Journal
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