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Development of High Power Radio Frequency Windows for Next-Generation Superconducting and Normal Conducting Accelerators--Advanced Energy Systems, Inc., 27 Industrial Blvd., Suite E, Medford, NY 11763; 516-575-9345
Mr. Michael Cole, Principal Investigator
Mr. Anthony Favale, Business Official
DOE Grant No. DE-FG02-99ER82725
Amount: $99,981
High current, high duty factor accelerators have historically been plagued by the problem of transferring the necessary radio frequency (RF) power through the vacuum boundary between the RF transmission system and the high vacuum environment of the accelerator. This problem has limited the practical levels of current and accelerating field because the amount of power delivered through a single window has been limited to approximately 200 - 300 kW at 100 percent duty factor. A higher power window assembly will deliver more power per meter of accelerator thereby reducing cost and complexity while improving reliability. This project will integrate electromagnetic, thermal, and structural analysis with novel mechanical design, material utilization, and manufacturing techniques to arrive at a window assembly that combines high thermal conductivity, effective ceramic cooling, optimized ceramic shape, and optimized waveguide details. The goal is a window that is not limited by thermal effects. Phase I will concentrate on analytical iterations of the RF geometry and the thermal/structural performance. Suitable candidates will be carried to the detailed design stage to develop attachment details, process plans, and fabrication cost estimates. Two designs will be produced: one for the Jefferson Laboratory Free Electron Laser upgrade, and one for lower frequency applications such as the Cornell Electron Storage Ring (CESR).
Commercial Applications and Other Benefits as described by the awardee: A window assembly not limited by thermal effects would revolutionize the accelerator world by allowing much higher power input per unit length than currently possible. In superconducting systems particularly, significantly higher gradients with higher current could be produced, thereby improving overall cost, efficiency, and reliability of accelerator systems.