Electric lamp and discharge devices: systems – High energy particle accelerator tube – Electrostatic accelerator means
Patent
1994-08-18
1996-06-04
O'Shea, Sandra L.
Electric lamp and discharge devices: systems
High energy particle accelerator tube
Electrostatic accelerator means
315500, 315507, H01J 2308, H01J 2300, H05H 700
Patent
active
055236596
ABSTRACT:
A drift tube linac incorporates rf-electric quadrupole focusing by employing drift tubes with only one drift-tube stem per particle wavelength and in which the lowest frequency RF cavity mode has a transverse magnetic field (TM.sub.010 -mode). Each drift tube comprises two separate electrodes that form a capacitor that couples to the axial electric field of the primary cavity mode. The electrodes operate at different electrical potentials, as determined by the RF fields in the cavity, and are supported by a single stem along the axis of a cylindrical cavity. Each electrode supports two fingers pointing towards the opposite end of the drift tube, forming a four fingered geometry that produces an RF quadrupole field distribution along its axis. The fundamental periodicity of the structure is equal to the particle wavelength (.beta..lambda.) where .beta. is the particle velocity in units of the velocity of light and .lambda. is the free space wavelength of the rf. The particles traverse two distinct regions, namely the gaps between drift tubes, where the acceleration takes place, and the regions inside the drift tubes, where the RF focusing takes place. The linac of the present invention transforms the reverse fields into transverse fields for focusing such that the beam is not decelerated.
REFERENCES:
patent: 3501734 (1970-03-01), Knapp et al.
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
patent: 5014014 (1991-05-01), Swenson
patent: 5113141 (1992-05-01), Swenson
E. D. Courant and H. S. Snyder, "Theory of the Alternating-Gradient Synchroton", Annl. Phys. 3, 1-48 (1958).
L. Smith and R. L. Gluckstern, "Focusing in Linear Accelerators", RSI vol. 26, No. 2 (1950).
A. Carne, P. Lapostolle, B. Schnizer, and M. Prome, "Numerial Methods, Acceleration by a Gap", Linear Accelerators, North-Holland Publishing Company, pp. 747-783, (1970).
A. Carne and P. M. Lapostolle, "Design Equations in an Alvarez-Type Proton Linear Accelerator", Proc. of 1966 Linac Conf., pp. 201-206.
I. M. Kapchinskii and V. A. Teplyakov, "Linear Ion Accelerator with Spatially Homogeneous Strong Focusing", Prib. Tekh. Eksp., No. 2, pp. 19-22 (1970).
I. M. Kapchinskii and N. V. Lazarev, "The Linear Accelerator Structures with Space-Uniform Quadrupole Focusing", IEEE Trans, Nucl. Sci. NS-26, 3462 (1979).
D. A. Swenson, "Low-Beta Linac Structures", Proc. of 1979 Linac Conf., pp. 129-136.
R. H. Stokes, K. R. Crandall, J. E. Stovall, D. A. Swenson, "Rf Quadrupole Beam Dynamics", IEEE Trans. Nucl. Sci. NS-26 3469 (1979).
S. O. Schriber, "High-Beta Linac Structures", Proc. of 1979 Linac Conf., pp. 164-174.
I. M. Kapchinskii, "History of RFQ Development", Proc. of 1984 Linac Conference, pp. 43-46.
D. A. Swenson, "Extensions to the RFQ Domain", Particle Accelerators, 1990, vol. 32, pp. 21-26.
V. A. Teplyakov, "RFQ Focusing in Linacs", Proc. of 1992 Linac Conference, pp. 21-24.
Ning John
O'Shea Sandra L.
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