High brightness electron accelerator

U.S. Patent Number: 5336972

Abstract: A compact high brightness linear accelerator is provided for use, e.g., in a free electron laser. The accelerator has a first plurality of acclerating cavities having end walls with four coupling slots for accelerating electrons to high velocities in the absence of quadrupole fields. A second plurality of cavities receives the high velocity electrons for further acceleration, where each of the second cavities has end walls with two coupling slots for acceleration in the absence of dipole fields. The accelerator also includes a first cavity with an extended length to provide for phase matching the electron beam along the accelerating cavities. A solenoid is provided about the photocathode that emits the electons, where the solenoid is configured to provide a substantially uniform magnetic field over the photocathode surface to minimize emittance of the electons as the electrons enter the first cavity.

Inventors: Sheffield; Richard L. (Los Alamos, NM), Carlsten; Bruce E. (Los Alamos, NM), Young; Lloyd M. (Los Alamos, NM)

Assignee: The United States of America as represented by the United States (Washington, DC)

Application Number: 07/914,327

Issued: 1994-08-09

Expired: 2006-08-09

Classes: 315/5.41 ; 315/505

Field of search: 315/5.41,5.42 372/2 313/359.1,360.1 328/227,233,64

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