High field pulsed microwiggler comprising a conductive tube with

Details High field pulsed microwiggler comprising a conductive tube with High field pulsed microwiggler comprising a conductive tube with

1990-12-07

1992-09-01

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Combined cathode ray tube and circuit element structure

372 2, 372 37, H01S 30959, H01J 2334

Patent

active

051441934

ABSTRACT:
A microwiggler assembly produces large magnetic fields for oscillating ched particle beams, particularly electron beams for free electron laser (FEL) application. A tube of electrically conductive material is formed with radial slots axially spaced at the period of the electron beam. The slots have alternate 180.degree. relationships and are formed to a maximum depth of 0.6 to 0.7 times the tube circumference. An optimum slot depth is selected to eliminate magnetic quadrupole fields within the microwiggler as determined from a conventional pulsed wire technique. Suitable slot configurations include single slits, double slits, triple slits, and elliptical slots. An axial electron beam direction is maintained by experimentally placing end slits adjacent entrance and exit portions of the assembly, where the end slit depth is determined by use of the pulsed wire technique outside the tube.

REFERENCES:
patent: 4283687 (1981-08-01), Madey et al.
patent: 4331936 (1982-05-01), Schlesinger et al.
patent: 4530096 (1985-07-01), Bekefi et al.
patent: 4542510 (1985-09-01), Black, Jr.
patent: 4727551 (1988-02-01), Schorlemann
patent: 4876687 (1989-10-01), Feinstein

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