Electron diffraction instrument using the high energy beam of LINAC

Abstract

A preliminary experiment was conducted for the purpose of using the linear accelerator (LINAC) as a high energy electron source, instead of a Cockcroft-Walton type accelerator. Since LINAC acceleration is easier at high energies, the duty factor and the energy distribution of the linac beam were the main problems; both were solved by this new method. A pulse-slicer was developed to make particularly high power pulses (130 kV, 12.5 MW) even. It allowed a pulse flatness of 5*10-4 (pulse width 1 mu s) to be obtained. An automatic control circuit was used for the pulse power to get a stability of 1*10-3 min-1.