| Paper |
Title |
Page |
| WEPMA112 |
Thermal Simulations of a Photocathode R. F. Gun
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482 |
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- B. Biswas, S. Krishnagopal, A. Kumar, S. Lal, K. K. Pant
RRCAT, Indore (M. P.)
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We are developing a photocathode linac, which uses a 2856 MHz r.f. gun, with a copper cathode driven by a 102 MHz, 266 nm laser at inclined incidence. The laser photocathode r.f. gun is a 1.6 cell BNL/SLAC/UCLA type III r.f. gun. In this paper we present the dynamic thermal cooling simulations to calculate the structural deformations and consequent frequency drift of the gun. We have done a complete r.f.-thermal-structural-r.f finite-element analysis (FEA) of the gun in that order, using ANSYS/MULTIPHYSICS. We find that with the present coolant channel design the gun can operate at up to 2 Hz without any significant change in resonant frequency and field balance.
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