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HK: Physik der Hadronen und Kerne

HK 22: Postersitzung

HK 22.9: Poster

Montag, 7. März 2005, 16:30–18:00, TU MA141

Determination of Effective Target Thickness and Luminosity from Beam Energy Losses at the ANKE Cluster Target* — •Irakli Keshelashvili, Michael Hartmann, Hans Joachim Stein, Yoshikazu Maeda, and Dieter Prasuhn — Forschungszentrum Jülich, Jülich, Germany

The thickness of a hydrogen cluster jet target and the corresponding luminosity in an experiment at the ANKE spectrometer at the internal beam of the COSY-Jülich accelerator were determined by measuring the energy loss of the circulating proton beam[1]. Possible error sources of the measurement, especially residual gas influences, were carefully studied resulting in a relative accuracy better than 10%. In parallel, the luminosity was determined by the standard technique of elastic scattering based on known cross sections. The results do compare reasonably well. Practicability and limitations of the energy loss method are discussed. * This work is supported by the FZJ.

[1] H.J.Stein, D.Prasuhn, IKP annual report 2001, 64