| Paper |
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Other Keywords |
Page |
| WEPCH051 |
Isochronous Magneto-optical Structure of the Recirculator SALO
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injection, quadrupole, dipole, site |
2035 |
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- I.S. Guk, A. Dovbnya, S.G. Kononenko, F.A. Peev, A.S. Tarasenko
NSC/KIPT, Kharkov
- J.I.M. Botman, M.J. Van der Wiel
TUE, Eindhoven
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With the goal to provide low energy spread of electron beam, the magneto-optical structure of the recirculator SALO has been modified. All of its parts (an injection tract and arcs) were made isochronous and achromatic. Besides, with the purpose of the accelerating structure arrangement, the length of straight sections was enlarged. The amplitude and dispersion functions on various recirculator sections and design characteristics of the beam are submitted.
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| THPCH041 |
Alternate Cavity Designs to Reduce BBU
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BBU, TESLA, dipole, ERL |
2874 |
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- E. Wooldridge
CCLRC/DL/ASTeC, Daresbury, Warrington, Cheshire
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An investigation was carried out on alternate cavity designs to decrease the effect of the higher order modes (HOMs) whilst maintaining the cavity accelerating gradient. The cavities were modelled in Microwave Studio and the number of cells per cavity and the number of cells per unit length were examined. HOM data from these models was used in beam break up (BBU) codes to calculate the threshold and the results are presented here. The cells of each cavity were slightly deformed alternately in the x and y planes so that the fundamental frequency of the cavity remained unperturbed, whilst minimising the HOM coupling between consecutive cells. Other patterns, such as alternating each deformed cell by several degrees, were also investigated. The data from these e-m models was also used in BBU calculations and their thresholds calculated.
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