Mainz 2012 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 35: Instrumentation

HK 35.7: Talk

Wednesday, March 21, 2012, 18:15–18:30, P 3

Feasibility Studies for the EXL Project at FAIR — •K. Yue^1,2, S. Bagchi³, S. Diebold⁴, C. Dimopoulou¹, P. Egelhof¹, V. Eremin⁵, S. Ilieva⁶, N. Kalantar-Nayestanaki³, O. Kiselev^1,6, T. Kröll⁶, Y.A. Litvinov¹, M. Mutterer¹, M.A. Najafi³, N. Petridis⁷, U. Popp¹, C. Rigollet³, M. von Schmid⁶, M. Steck¹, and B. Streicher³ — ¹GSI, Darmstadt — ²IMP, Lanzhou — ³KVI, Groningen — ⁴PIT, Tübingen — ⁵PTI, St. Petersburg — ⁶TU, Darmstadt — ⁷Goethe Universität, Frankfurt a.M.

This contribution presents the results of feasibility measurements performed for the EXL (EXotic nuclei studied in Light-ion induced reactions at the NESR storage ring) project at the Experimental Storage Ring (ESR) at GSI, Darmstadt. The stored 400 MeV/u ⁴⁰Ar beam impinged on an internal hydrogen gas-jet target. An UHV (Ultra High Vacuum) compatible single-sided Si strip detector was used to detect recoil protons. The proton elastic-scattering cross section obtained using the recoil detector is compared with theoretical predictions. The results on target and beam performance as well as the background conditions for the recoil detector will also be presented. In order to investigate the response of DSSD (Double-Sided Silicon Strip Detector) prototype detectors to very low-energy (74 keV to 1.5 MeV) protons, another detector test was performed at the Van-de-Graaff accelerator at Tübingen University. An energy resolution of 20 keV (FWHM) has been obtained for the slowest protons. This work was supported by BMBF (06DA9040I) and HIC for FAIR.