Abstract
A new π mode RF electron gun is proposed for the Iranian Light Source Facility. This RF gun will be fabricated using a newly developed method based on clamping the parts together instead of vacuum brazing. In this method, RF contact and vacuum seal are mutually provided by a special copper gasket. The first section of this article describes the new π mode RF gun and its expected performance in detail. The report of our recent R&D tests on the new fabrication method is discussed in the next section. We performed the RF and vacuum measurements on a single-cell structure, and the copper gasket provided suitable RF contact, and a vacuum pressure of 2.5×10−7 mbar was also reached after 1 h of pumping with a turbo-molecular pump without baking. In the last section, we investigated using a high-current and low-emittance DC triode electron gun to be mounted on the RF gun as an alternative cathode assembly. The simulation results of this proposed scheme were compatible with our previous studies. The research and development of the new π mode RF electron gun and the proposed cathode assembly will begin soon.
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