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| FRPMN063 |
Superconducting RF Gun Cavities for large Bunch Charges
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4150 |
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- V. Volkov
BINP SB RAS, Novosibirsk
- K. Floettmann
DESY, Hamburg
- D. Janssen
FZD, Dresden
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The first electron beam of the RF gun with a 3.5 cell superconducting cavity is expected in July 2007 in FZD. This cavity has been designed for small bunch charges. In the paper we present the design of a similar cavity and of 1.5 cell gun cavities for large bunch charges. For a charge of 2.5 nC, which is the design value of the BESSY-FEL, and a bunch length of 21 ps a projected transverse emittance less then 1 π mm mrad has been obtained (without thermal emittance).
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