The Harwell 136 MeV Electron Linear Accelerator

A 136 MeV., L-Band electron linear accelerator design and performance specifications are presented with operational characteristics measured during the comissioning trials. These results confirm the machine´s operational flexibility for operation over a wide specification range without readjustments as required by the beam sharing design concept. By variation of the R.F. power and phasing beam current energies in the energy range 2 to 136 MeV are available. The machine is fully protected from high beam power damage by current, duty cycle and beam offcentre trips. All trip systems are fully compatible with beam sharing control techniques. In parallel with the machine contract, additional development work has progressed on power multiplexing units for the electron gun amplitude ahd pulse length control systems.