| Paper |
Title |
Other Keywords |
Page |
| MOP024 |
Electromagnetic Green's-Function-Based Simulations of Photocathode Sources
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simulation, space-charge, cathode, gun |
88 |
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- M. Hess, D. Bolton, C. S. Park, L. Zhu
IUCF, Bloomington, Indiana
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We show the results of beam simulations for photocathode sources using a newly developed Green's function based code called IRPSS (Indiana Rf Photocathode Source Simulator). In general, a fully electromagnetic treatment of space-charge fields within simulations of photocathode sources is typically difficult since the beam is most often tightly bunched. The problem is further complicated by the inclusion of nearby conducting structures, i.e. cathode and cavity walls, from which the fields are reflected. The entire problem can be solved self-consistently using an electromagnetic Green's function method. Since Green's functions are generated by a Delta function source while simultaneously satisfying the boundary conditions of the system, they are an effective tool when solving for fields within photocathode source simulations. Using IRPSS we show the results of multiparticle simulations for a variety of photocathode source experiments.
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| THP086 |
Mitigation of Power Loss Due to Skin Effect by Thin-Layered Film
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resonance, controls, vacuum |
785 |
| |
- Y. Iwashita
Kyoto ICR, Uji, Kyoto
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The AC current flows only on the metal surface, which is known as skin effect. The current concentration on the surface increases power loss. This results higher transmission loss of cable and degradation of Q in cavities. Skin effect on a metal film that is thinner than a skin depth is investigated starting from general derivation of skin depth on a bulk conductor. The reduction of the skin effect power loss with layered conductor films is reported and discussed.
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