Laser photoionization of Ho beams for charge-changing injection

The two-step charge-changing injection used in the Los Alamos Proton Storage Ring (PSR) requires stripping of H- to Ho by high magnetic fields and subsequent stripping of Ho to H+ by a carbon foil. We consider single-and multiphoton laser ionization as alternatives to using a fragile foil. The multiphoton case is of possible interest for selection of… (More)