Coherent light generators – Free electron laser
Patent
1990-01-04
1990-11-20
Scott, Jr., Leon
Coherent light generators
Free electron laser
328233, H01S 300
Patent
active
049724207
ABSTRACT:
A high gain, single-pass free electron laser formed of a high brilliance electron injector source, a linear accelerator which imparts high energy to the electron beam, and an undulator capable of extremely high magnetic fields, yet with a very short period. The electron injector source is the first stage (gap) of the linear accelerator or a radial line transformer driven by fast circular switch. The linear accelerator is formed of a plurality of accelerating gaps arranged in series. These gaps are energized in sequence by releasing a single pulse of energy which propagates simultaneously along a plurality of transmission lines, each of which feeds the gaps. The transmission lines are graduated in length so that pulse power is present at each gap as the accelerated electrons pass therethrough. The transmission lines for each gap are open circuited at their ends. The undualtor has a structure similar to the accelerator, except that the transmission lines for each gap are substantially short circuited at their ends, thus converting the electric field into magnetic field. A small amount of resistance is retained in order to generate a small electric field for replenishing the electron bunch with the energy lost as it traverses through the undulator structure.
REFERENCES:
patent: 4720832 (1988-01-01), Deki
patent: 4893089 (1990-01-01), Villa
Harris Blake Corporation
Jr. Leon Scott
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