Extractive electrode situated in the vicinity of the particle so

Details Extractive electrode situated in the vicinity of the particle so Extractive electrode situated in the vicinity of the particle so

1977-12-07

1979-03-27

Demeo, Palmer C.

Electric lamp and discharge devices

Cyclotrons

313146, 313237, 313326, 313363, H01J 194, H05H 1300

Patent

active

041468112

ABSTRACT:
An extractive electrode allowing to reduce the vertical focusing and defocusing effect of the hyperfrequency electrical field used for accelerating the particles of a beam within an accelerator of cyclotron type. The extractive electrode comprises a metallic block having a substantially prismatic shape and provided in its entry face facing the particle source with at least a window which opens onto a deep notch delimited by two curved lateral walls forming a channel C for the passage of the beam. A median element located within this channel C allows to obtain two separated channels for the passage of the two beams corresponding to two harmonic operating frequencies.

REFERENCES:
patent: 2716197 (1955-08-01), Jones et al.
patent: 3867705 (1975-02-01), Hudson et al.
"The Central Region of the Delft 12 MeV Isochronous Cyclotron," by B. Lubach, Nuclear Instruments and Methods, 89, No. 1, (1970), pp. 141-146, North-Holland Publishing Co.

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