Energy straggling of heavy ions in thin foilsReport as inadecuate

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Abstract : The energy straggling of heavy ion beams at tandem energies, passing through thin foils, has been studied with ions of mass up to A = 35. Charge exchange in the foils has been found to have a considerable effect on the energy spread. Thickness non-uniformities in the foils can also make significant contributions. Extrapolation of the observations to the case of a uniform carbon stripper foil in a tandem accelerator suggests energy straggling of the order a few tenths per cent of the beam energy. However, large non-uniformities in the foil could appreciably worsen the beam resolution.

Keywords : beam handling equipment carbon electrostatic accelerators energy loss of particles particle accelerator accessories energy straggling heavy ion beams tandem energies thin foils energy spread charge exchange effects thickness nonuniformities C stripper foil tandem accelerator

Author: J.M. Freeman C.J. Sofield N.E.B. Cowern J.P. Mason R.J. Petty



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