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Title |
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| TUPCH123 |
Dipole Stabilizing Rods System for a Four-vane RFQ: Modeling and Measurement on the TRASCO RFQ Aluminum Model at LNL
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1301 |
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- F. Grespan, A. Palmieri, A. Pisent
INFN/LNL, Legnaro, Padova
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The Dipole Stabilizing Rods (DSR's) are devices used in order to reduce a priori the effect of perturbation on the operating mode of a four-vane RFQ caused by neighboring dipole modes by increasing the frequency spacing between the TE210 mode and dipole modes, without, in principle, affecting the quadrupole TE210 mode. They have proven to be particularly useful in the case of coupled RFQ's whose overall length is significantly greater than the operating wavelength. In this article we present a circuit model of such DSR's, that, used in combination with a transmission line model of a four vane RFQ, has allowed us to predict the dimensioning of the DSR's in the case of the aluminum model of TRASCO RFQ. The DSR parameters and, in general, the accuracy of the model have been also confirmed by HFSS simulations and by RF measurements on the above-mentioned model.
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| TUPLS045 |
Completion of the Commissioning of the Superconducting Heavy Ion Injector PIAVE at INFN-LNL
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1597 |
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- G. Bisoffi, G. Bassato, A. Battistella, l. Boscagli, A. Calore, S. Canella, D. Carlucci, M. Cavenago, F. Chiurlotto, M. Comunian, M. De Lazzari, A. Facco, E. Fagotti, A. Galatà, P. Modanese, M.F. Moisio, A. Pisent, M. Poggi, A.M. Porcellato, P.A. Posocco, C. Roncolato, E. Sattin, S. Stark
INFN/LNL, Legnaro, Padova
- N. Schiccheri
CNAO Foundation, Milan
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At INFN-LNL the commissioning of the injector PIAVE, based on superconducting RFQs, has been completed. All the superconducting cavities (two RFQs and 8 quarter wave resonators - QWR) have shown very satisfactory stability with respect to changes of the liquid helium pressure and microphonics. Beam parameters are very close to the nominal values. The commissioning was completed by accelerating the pilot beam 16O3+ with the PIAVE injector and the booster linac ALPI (summer 2005). Since December 2005, a number of test beams were accelerated (mainly noble gas species) with PIAVE and ALPI and delivered to user experimental stations. Regular operation will be scheduled from Fall 2006 onwards.
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