Vane coupling rings: a simple technique for stabilizing a four-vane radiofrequency quadrupole structure
The benefits of stabilized accelerating structures, with regard to the manufacture and operation, have been well documented. The four-vane radiofrequency quadrupoles (RFQ) presently being designed and constructed in many laboratories are not stabilized because of the weak electromagnetic coupling between the quadrant resonators. This paper presents a simple technique developed at the Lawrence Berkeley Laboratory using vane coupling rings (VCR's) which azimuthally stabilize the RFQ structure and greatly enhance its use as a practical accelerator. In particular, the VCR's: Completely eliminate the dipole modes in the frequency range of interest; Provide adequate quadrant balance with an initial precision mechanical alignment of the vanes; Enhance axial balance and simplify end tuners. Experimental verification tests on a scale model will be discussed.
- Research Organization:
- Lawrence Berkeley Lab, Univ. of California, Berkeley, CA 94720
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 5610010
- Journal Information:
- IEEE Trans. Nucl. Sci.; (United States), Vol. 30:2
- Country of Publication:
- United States
- Language:
- English
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