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Poster communications

A New RF Tuning Method for the End Regions of the IPHI 4-vane RFQ

Abstract : The 3-MeV High Intensity Proton Injector (IPHI) RFQ is constituted by the assembly of three 2-m-long segments. The tuning of the end regions of such an accelerator with respect to the quadrupole mode is generally made by machining the thickness of the end plates. The dipole modes are moved away from the accelerator mode frequency by adding dipole rods and adjusting their length. In the case of the last IPHI RFQ segment, the tuning range given by possible plate thickness was not sufficient to adjust the frequency at 352 Mhz without modifying the notch depth, leading to serious engineering problems for the cooling, new thermo-mechanical simulations and drawings. To avoid these difficulties, a new way has been investigated by replacing the end plate thickness adjustment by a "quadrupole rod" length adjustment. These rods are situated between the beam axis and the dipole rods, and the tuning range is largely increased. The paper will describe this method applied to the IPHI RFQ and some experimental results obtained on the cold model.
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Poster communications
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Contributor : Michel Lion <>
Submitted on : Friday, December 15, 2006 - 2:59:48 PM
Last modification on : Thursday, February 1, 2018 - 1:35:58 AM
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  • HAL Id : in2p3-00120575, version 1



O. Delferriere, M. Desmons, A. France, R. Ferdinand. A New RF Tuning Method for the End Regions of the IPHI 4-vane RFQ. Tenth European Particle Accelerator Conference "EPAC'06", Jun 2006, Edinburgh, United Kingdom. pp.285-287, 2006. ⟨in2p3-00120575⟩



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