| Paper |
Title |
Page |
| TUPD032 |
RFQ Vacuum Brazing at CERN
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1494 |
| |
- S. J. Mathot
CERN, Geneva
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The aim of this paper is to describe the vacuum brazing procedure used at CERN for the brazing of Radio Frequency Quadrupole (RFQ). The RFQ is made of high precision machined OFE copper pieces assembled together. Vacuum brazing is one of the most promising techniques used to join the individual components leading to vacuum tightness and high precision alignment. The RFQ's brazed at CERN are made of four 100 or 120 cm long vanes (two majors and two minor vanes). Our brazing procedure consists of two steps. The first step involves the brazing of the four vanes in a horizontal position. The second step consists of brazing the vacuum stainless steel flanges to the copper structure in a vertical position. The paper describes the problems encountered with the alignment and the vacuum tightness. The difficulties related to the stress relaxation of the machined copper pieces during the brazing heat treatment are discussed. In addition, the solutions developed to improve the alignment of the brazed RFQ's are also presented.
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| TUPP132 |
Design, Construction and Low Power RF Tests of the First Module of the ACLIP Linac
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1836 |
| |
- V. G. Vaccaro
Naples University Federico II, Mathematical, Physical and Natural Sciences Faculty, Napoli
- C. De Martinis
Universita' degli Studi di Milano & INFN, Segrate
- D. Giove
INFN/LASA, Segrate (MI)
- M. R. Masullo
INFN-Napoli, Napoli
- S. J. Mathot
CERN, Geneva
- A. C. Rainò, V. Variale
INFN-Bari, Bari
- R. J. Rush
e2v, Chelmsford, Essex
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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 tumours 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 under investigation within a collaboration with the company e2v (Chelmsford, UK). ACLIP is a 5 modules structure coupled together. The first one (able to accelerate proton from 30 to 35 MeV) has been machined and completely the brazed. We plan to have the high power test by early fall 2008. 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.
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