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Electron cloud effects on an intense ion beam in a four solenoid lattice
The Solenoid Transport Experiment (STX) at LBNL successfully demonstrated the transport of a space-charge dominated ion beam in a two-solenoid lattice. Initial experiments showed a strong dependence of electron cloud effects on solenoid field strength. A current-reducing aperture, two solenoids and in-bore diagnostics were added to the two-solenoid lattice in order to study electron cloud effects more closely. Experiments were conducted with a 10 {micro}s, singly charged potassium ion bunch at an ion energy of 0.3 MeV and currents of 26 mA and 45 mA. A qualitative comparison of experimental and calculated results are presented, including a comparison of the effects of manipulating electrons on the beam dynamics, quantifying beam-induced gas desorption, ionization, and electron effects