High-energy ion linacs based on superconducting spoke cavities

K. W. Shepard; P. N. Ostroumov; J. R. Delayen

doi:10.1103/PhysRevSTAB.6.080101

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High-energy ion linacs based on superconducting spoke cavities

K. W. Shepard, P. N. Ostroumov, J. R. Delayen

DOI 10.1103/PhysRevSTAB.6.080101 · Physical Review Special Topics - Accelerators and Beams

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Abstract

The applicability of superconducting TEM-class spoke cavities to high-energy ion linacs is discussed, and detailed designs for two TEM-class, triple-spoke-loaded superconducting niobium resonant cavities are presented. The 345 MHz cavities have a velocity range of 0.4<β<0.75 and a beam aperture of 4 cm. Spoke-loaded cavities offer several advantages compared with the higher-frequency elliptical-cell cavities that are currently being developed for this range of particle velocities. The proposed triple-spoke cavities can provide broader velocity acceptance, more accelerating voltage per cavity, reduced heat-load operation at 4.2 K, and increased longitudinal acceptance through the high-energy section. Application to the proposed U.S. rare-isotope accelerator driver linac is discussed in detail.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	9.2	Pressure not reported	unknown