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A: Fachverband Atomphysik

A 27: Posters: Electron scattering and recombination

A 27.11: Poster

Thursday, March 13, 2008, 16:30–18:30, Poster C3

Low energy electron cooler for the Heidelberg CSR — •andrey shornikov, dmitry orlov, manfred grieser, and andreas wolf — Max-Planck-Institut für Kernphysik, Heidelberg, Germany

The Cryogenic Storage Ring (CSR) is currently under development at MPI-K in Heidelberg. The CSR is an electrostatic ring intended for storing ions in the 20-300 keV energy range (E/Q) in cryogenic environment at temperature down to 2K. CSR will be equipped with an electron cooler which has to combine cooler and electron target functions. For cooling operation at given ion energies corresponding electron energies are in the range from 160 down to a few eV. Main problems in such operation mode are the decrease of electron beam intensity, the degradation of the electron longitudinal energy spread[1] and the distortion of stored low energy ion trajectories during beams merging. For the CSR a new merging beam section layout[2] together with a photocathode based cold electron source[3] (tested at the Heidelberg TSR) have been proposed. In this paper we present the design of CSR electron cooler including the cryogenic implementation together with numerical calculations of the electron beam longitudinal and transverse energy spread in merged beam section.

[1] D. Orlov et al. Proc COOL05 (2005) pp 478-487

[2] H. Fadil et al. Proc EPAC2006 pp 1630-1632

[3] D. Orlov et al , J. Phys.:Conf.Ser., 4,pp 290-295(2005)