| Paper |
Title |
Page |
| TUPLT044 |
Delta-T Procedure for Superconducting Linear Accelerator
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1249 |
| |
- A. Bogdanov, R. Maier, Y. Senichev
FZJ/IKP, Jülich
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Development of the tune-up procedure for a linear accelerator is the next important stage after the design is complete. Conventional delta-T procedure developed for tuning of a normal-conducting linear accelerator by Crandall allows setting up of accelerating field amplitude and phase in cavity with known phase velocity. However, application of the delta-T procedure to a superconducting linac meets some difficulties. In particular, the synchronous phase velocity in superconducting linac is determined by RF phase shift between cavities, but not by geometrical size of accelerating cells as in normal conducting linac. Additionally, in superconducting linac the smaller phase advance leads to an insensibility of particles at the cavity exit to the variation of the electric field inside the cavity. In the paper we consider the modified delta-T procedure adjusted for superconducting linac. Numerical simulations prove that by proposed technique both tasks of preservation of necessary stable region motion and providing the beam with required final energy can be successfully solved.
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| TUPLT045 |
Separatrix Formalism Applied to Linacs Accelerating Particles with Different Charge to Mass Ratio
|
1252 |
| |
- A. Bogdanov, R. Maier, Y. Senichev
FZJ/IKP, Jülich
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We have developed separatrix formalism for superconducting linear accelerators. This method allows optimizing the quasi-synchronous velocity behavior along a linac. It gives a great advantage in acceleration of particles with different charge to mass ratio. In the article design optimization of structure supposed to accelerate different particles is presented. As an example for numerical simulation superconducting injector COSY is taken.
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