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RF behaviour of 3 GHz SCDTL structures

Published online by Cambridge University Press:  01 October 2002

L. Picardi ,
C. Ronsivalle  and
B. Spataro
L. Picardi
Affiliation:
ENEA, Div. Fisica Applicata, CR Frascati, CP 65, 0044 Frascati (Roma), Italy
C. Ronsivalle*
Affiliation:
ENEA, Div. Fisica Applicata, CR Frascati, CP 65, 0044 Frascati (Roma), Italy
B. Spataro
Affiliation:
LNF-INFN, Div. Fisica Applicata, CR Frascati, CP 65, 0044 Frascati, Italy
*
ronsival@frascati.enea.it
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Abstract

The 3 GHz linac section designed for the low energy (7–65 MeV) part of TOP (Therapy Oncological Protons) linac consists of eight modules of the structure SCDTL (Side Coupled Drift Tube Linac). The non axisymmetric cavities required a full 3D modelling. Electromagnetic calculations carried out by using MAFIA code gave the full mode spectrum, power losses, the coupling coefficients distribution and some indications for the tuning procedure. This paper reports a comparison between the results of this study and some RF measurements on the first module (7–13.4 MeV).

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 20 , Issue 1 , October 2002 , pp. 61 - 68
Copyright
© EDP Sciences, 2002

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References

L. Picardi, C. Ronsivalle, A. Vignati, Progetto del TOP Linac (in Italian), ENEA Technical Report RT/INN/97/17, 1997
G. Messina, et al., New Structural design of SCDTL structures for the TOP linac, European Particle Accelerator Conference, EPAC98 Proc., p. 2333
J. Billen, L. Young, User's guide for the POISSON/SUPERFISH Group of Codes, LA-UR-96-1834
E. Tanabe, et al., Voltage breakdown at X band and C band frequencies, Proceedings of 1986 Linear Accelerator Conference, SLAC, Stanford, California, June 2-6, 1986
L. Picardi, C. Ronsivalle, B. Spataro, Design development of the SCDTL structure for the TOP linac, NIMA 425 (1999), pp. 8-22
T. Weiland, MAFIA - a three dimensional electromagnetic CAD system for magnetic RF structures and transient wake field calculations, Proc. 1986 Linear Accelerator Conference
E.L. Ginzton, Microwave measurements (Mc Graw Hill, 1957), Chaps. 9, 10