MIT successfully tested CCR’s internal converter for gyrotrons. The coupler converted 1.12 MW of RF power into an HE11 mode in corrugated waveguide inside the vacuum envelope of the gyrotron. This could potentially reduce the cost of gyrotrons by more than $100K and eliminate requirements for Mirror Optical Units, which reduces the cost of electron cyclotron heating systems approximately $500K per gyrotron. CCR presented these results at the RF Heating Technology Workshop in Santa Monica on September 7th. The MIT test performance is compared with the conventional multi-mirror Gaussian output converter in the accompanying figure.
The U.S. Department of Energy awarded CCR two new programs to advance RF source technology. CCR will work with SLAC National Accelerator Laboratory to develop high efficiency klystrons for the next generation of accelerators. The goal is to provide klystrons operating at efficiencies exceeding 85%, which is considerably higher than current technology. In the second program, the company will team with N.C. State University to explore additive manufacturing of klystrons. If successful, this will dramatically reduce the price of RF sources for accelerators, particularly for big science programs where hundreds or thousands of a single klystron type will be required. The program will address issues with additive manufacturing of copper, ensuring material quality, and providing the required finish for high field surfaces. The test device will be a klystron used in commercial cancer therapy accelerators.