Variable energy standing wave linear accelerator structure

Details Variable energy standing wave linear accelerator structure Variable energy standing wave linear accelerator structure

1979-10-12

1981-08-25

Chatmon, Jr., Saxfield

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Combined cathode ray tube and circuit element structure

315 542, H01J 2510

Patent

active

042861926

ABSTRACT:
Variable energy selection is accomplished in a side cavity coupled standing wave linear accelerator by shifting the phase of the field in a selected side coupling cavity by .pi. radians where such side coupling cavity is disposed intermediate groups of accelerating cavities. For an average acceleration energy of E.sub.1 (MeV) per interaction cavity, and a total number of N interaction cavities, the total energy gain is E.sub.1 (N-2N.sub.1) where N.sub.1 is the number of interaction cavities traversed beyond the incidence of the phase shift. The phase shift is most simply accomplished by changing the selected side cavity configuration mechanically in repeatable manner so that its resonant excitation is switched from TM.sub.010 mode to either TM.sub.011 or TEM modes. Thus, the total energy gain can be varied without changing the RF input power. In addition, the beam energy spread is unaffected.

REFERENCES:
patent: 3906300 (1975-09-01), Tran
patent: 3953758 (1976-04-01), Tran
patent: 4004181 (1977-01-01), Kervizic et al.
patent: 4155027 (1979-05-01), Schriber et al.
patent: 4160189 (1979-07-01), Tran et al.
patent: 4162423 (1979-07-01), Tran

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