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- A. Fukasawa, H. Badakov, B. D. O'Shea, J. B. Rosenzweig
UCLA, Los Angeles, California
- D. Alesini, L. Ficcadenti, B. Spataro
INFN/LNF, Frascati (Roma)
- L. Palumbo
Rome University La Sapienza, Roma
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We present here the RF aspects and beam dynamics study of a hybrid photoinjector, where the cathode section is standing wave, and the section downstream of the third (coupling) cell is traveling wave. This device has strong RF advantages: there is a single feed, mitigating expense, and there is a nearly complete suppression of reflected power during the SW section fill. This, critically, allows one to scale these devices to higher field and frequency, which should dramatically improve beam brightness. Further, the beam dynamics are fundamentally changed, as the TW section acts as a velocity buncher. Thus one may produce low emittance, >kA beams at 20-30 MeV from such a device. We discuss here results of detailed beam dynamics simulations, RF design and initial cold-testing, and preparations for high power testing.
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