Dynamics in isochronous machine of FFAG type
| Autor: | Riche, J A |
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| Jazyk: | angličtina |
| Rok vydání: | 2002 |
| Předmět: | |
| Popis: | Machines of FFAG type are considered for the different stages of a neutrino factory: ionization cooling, phase rotation and acceleration of the muons. Ionization cooling and phase rotation of the muons are performed at low energy. One could match the accelerating field frequency with the variation of the revolution frequency if the energy dispersion of the injected beam was small. But efficiency requires the acceptance of a large energy spread of the injected muons. Therefore a machine isochronous for all energies is an attractive solution. Isochronisms can be provided as the result of two effects: a magnetic field variation with the distance to the machine centre and a variation of the azimuthal separation between the magnets with the distance to the centre [1]. A suitable combination of these effects may give the best results in geometry and focusing properties. Because of the lifetime constraints, high accelerating gradients are required and one may accept crossing betatron resonances because their effects cannot build up much in a limited number of turns. The purpose is to follow the trajectories by direct intergration of the action of the fields. |
| Databáze: | OpenAIRE |
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