In certain applications the linear arrangement of ion source and charge exchange chamber in standard charge exchange sources for neutral atomic beams leads to undesirable stray light. To avoid this problem a new design has been developed and tested. The maximum beam flux emerging from this source is 2.0thinsp;sdot;thinsp;1010atoms/sthinsp;sdot;thinsp;mm2at the energyE= 100 eV. The energy spread Dgr;E/Elsim;0.5percnt;. The angular spread is about 0.47 deg FWHM. Adjusting the ion optics every 100 hours the intensity of the neutral beam has been measured to be stable within 10percnt; over a period of 400 hours.
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