Four-fingers RFQ linac structure

Details Four-fingers RFQ linac structure Four-fingers RFQ linac structure

1990-07-18

1992-05-12

Yusko, Donald J.

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Plural load device systems

328228, 315 534, H01J 2510

Patent

active

051131412

ABSTRACT:
A new RFQ linac structure extends the useful range of beam velocity by a factor of 2 to 4 and beam energy by a factor of 4 to 16. Four-finger electrodes extend into each accelerating cell and provide quadrupole focusing of beam particles along a beam axis. The finger electrodes of adjacent cells also provide quadrupole acceleration of the beam particles along the beam axis. The finger of adjacent cells are oriented in accordance with a prescribed pattern. The pattern orientation of the fingers provides an additional degree of freedom that allows the periodcity of the focal structure to be independent of the periodicity of the accelerating structure. This makes it possible to double the rf frequency periodically to enhance the acceleration rate while holding the focusing strength constant.

REFERENCES:
patent: 4211954 (1980-07-01), Swenson
patent: 4485346 (1984-11-01), Swenson et al.
patent: 4596946 (1986-06-01), Pottier
patent: 4906896 (1990-03-01), Swenson
Kapchinskiy, I. M., "History of RFQ Development", The Institute for Theoretical and Experimental Physics, 117259, Moscow (Dec. 1984).
Stokes et al., "The Radio-Frequency Quadrupole: General Properties and Specific Applications", Los Alamos Scientific Lab. (Dec. 1980).
Swenson, "PIGMI a Pion Generator for Medical Irradiation", LAL-81-6 Mini Review, Los Alamos National Laboratory, Feb. 1981.
Jamesson, R. A., "Introduction to RFQ Session", Los Alamos National Laboratory (Dec. 1984).
Schriber, S. Q., "Present Status of RFQ's", Los Alamos National Laboratory (Dec. 1985).
Staples, J., "RFQ's in Research and Industry", Lawrence Berkeley Laboratory (Dec. 1986).
Schempp, A., "Recent Progress in RFQ's", University of Frankfurt, Dec. 1988.

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