A new electron linac injector design up to 200 MeV

A single mechanical structure can include the on-axis components necessary for best electron bunching and acceleration up to 200 MeV in S-band. Two accelerating sections are put in series which will then be seen from the RF source as one load. The sections see a backward traveling wave (BTW) at the 3 pi /4 mode. The electrical end of the first section includes the buncher. A slight frequency change induces beam radial control while at the same time keeping the energy spectrum narrow. The input/output parts near the mechanical center insure good conductance, easy focusing, and dilatation. Energy figures are given at 3 GHz and at 11.4 GHz without or with mechanical integration.<>