Abstract
For the injection into the future proton LINAC at GSI, the ion source and low energy beam transport system has to deliver a 100 mA proton beam with approximately 100 keV at the entrance of the radio frequency quadrupole within an acceptance (normalized, rms) of 0.2 π mm mrad. The proton yield provided by the ion source should be 90% or higher, whereas the emittance should be as small as possible. The article presents the results of computer simulations done with AXCEL-INP for three different extraction and acceleration systems: a compound system, a pentode extraction system, and a combination of a triode extraction system followed by a separately screened dc acceleration system. These systems will be discussed in terms of beam brightness and facile handling for beam time operation.
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