Proceedings Article10.1109/PAC.2005.1590629
A New Tuning Method for Resonant Coupling Structures
T. Clauser,A. Raino,V. Variale,C. De Martinis,Dario Giove,M. Mauri,A. D'Elia,M.R. Masullo,V. G. Vaccaro +8 more
- 16 May 2005
- pp 973-975
7
TL;DR: In this paper, the authors proposed a tuning of the cavities of an accelerating structure to correct the deviation of each frequency mode from its nominal value by resorting to a perturbative technique applied to a circuit model representing this kind of structures.
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Abstract: In order to have efficient particle acceleration it is fundamental that the particles experience, in the accelerating gap, field amplitudes as uniform and as high as possible from gap to gap. Because of the unavoidable fabrication errors, an accelerating structure, when assembled, exhibits field values lower than the nominal ones and/or not uniform. All the usual procedures developed in order to adjust the parameter deviations responsible of the malfunctioning of these structures, are based on field amplitude measurements, by using the bead pull technique, which is a very invasive technique. In this paper the philosophy is reversed: it is assumed that all the information can be got by Sounding the Modes of the whole System (SMS) and correct the deviation of each frequency mode from its nominal value by means of an appropriate tuning of the cavities: resorting to a perturbative technique applied to a circuit model representing this kind of structures, it is possible to calculate the amount of tuning to give to the cavities. It will be shown that a very good equalization and maximization of the fields in the cavities can be achieved by using this technique.
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Citations
A Review of Scientific Instruments
TL;DR: Lang as discussed by the authors reviewed Lang's work in the Journal of Scientific Instruments (JSI) and Supplement No 1, 1951 Pp xvi + 388 + iii + 80 (London: Institute of Physics, 1951).
RF high power tests on the first module of the ACLIP LINAC
V.G. Vaccaro,Maria Rosaria Masullo,C. De Martinis,Dario Giove,A. Raino,V. Variale,S. Mathot,R.J. Rush,M. Iskander +8 more
- 01 Jan 2009
Abstract: ACLIP is a 3 GHz proton SCL linac designed as a booster for a 30 MeV commercial cyclotron. The final energy is 62 MeV well suitable for the therapy of ocular tumors or for further acceleration (up to 230 MeV) by a second linac in order to treat deep-seated tumours. The possibility of using magnetrons as the source of RF power, to reduce the overall cost of the machine, is one the more relevant features of this project and this investigation is carried out within the frame of a collaboration with e2v (Chelmsford, UK). ACLIP is formed by 5 modules coupled together. The first one (able to accelerate proton from 30 to 35 MeV) has been machined, completely brazed and in December 2008 full power RF tests were performed. In this paper we will review the main features of the linac and discuss the results of the RF measurements carried out on this prototype.
10
A rationale to design side coupled linac (scl): a faster and more reliable tool
Vittorio Giorgio Vaccaro
- 01 Jan 2006
TL;DR: In this paper, the authors proposed a new procedure based on a lumped circuit representation for resonant coupled structures, where the equations were studied in any condition of termination, and this procedure gave the possibility of having a full characterization either of a half-cell or a full-cell ended structure.
6
An analysis of lumped circuit equation for side coupled linac (scl)
Vittorio Giorgio Vaccaro
- 01 Jan 2006
TL;DR: In this paper, a measurement procedure was proposed to evaluate the parameters of the lumped circuit representation of the SCL module for the case of half-cell termination and non zero second order coupling constants.
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