SYSTEM FOR ADJUSTING THE ENERGY LEVEL OF A PROTON BEAM PROVIDED BY A CYCLOTRON, A CYCLOTRON TARGET HOLDER ASSEMBLY WITH A REMOVABLE DEGRADER, A REMOVABLE DEGRADER FOR USE IN A CYCLOTRON TARGET HOLDER ASSEMBLY, AND METHODS OF USE THEREOF

摘要

A system for adjusting the energy level of a proton beam by a cyclotron includes the cyclotron and a target holder assembly including a removable degrader. The removable degrader can be removed and/or replaced without removal of the target holder assembly from the cyclotron. A method for adjusting an energy level of a proton beam of a cyclotron includes providing a target holder assembly with a removable degrader in the path of the proton beam, where the removable degrader can be removed from the path of the proton beam without removal of a target holder assembly from the cyclotron.