RK-TBA STUDIES IN KA-BAND

It is well established that operating frequencies in the 30-GHz range and higher are required to obtain the high accelerating gradients needed by linear collider systems that wish to probe center-of-mass energies significantly higher than 1 TeV. As an rf power source for high-energy linear colliders, relativistic klystron two-beam accelerators (RK-TBAs) have been shown theoretically to scale favorably to frequencies higher than X-band. To complement our studies of RK-TBA systems at 11.424 GHz, we are undertaking experimental tests of components at both 35 and 30 GHz. These studies will be conducted at the CEA/CESTA facility using the LELIA and PIVAIR electron linear induction accelerators (LIAs), respectively, and will concentrate on the interaction of the intense, modulated electron beams with rf cavity structures, compact induction modules, and permanent magnet quadrupole transport lattices. Details of the rf cavity design and the proposed experiments are discussed.