High Efficiency, Low Cost, RF Sources for Accelerators and Colliders

Accelerators for High Energy Physics (HEP) are large users of energy, much of it in the form of radiofrequency (RF) power to accelerate particles to very high energies. Proposed HEP projects will require even larger amounts of RF energy. Increasing concerns of the cost and availability of energy will require the HEP community to use energy as efficeintly as possible. Successful transfer of HEP technology to the public and private sectors will be most effective if it is highly efficient. Historically, the HEP community has utilized available RF power sources, mainly in the form of vacuum tube technology, much of which was developed during the cold war or is otherwized used in the private sector. The private sector is moving to solid-state RF sources which do not exibit the electrical efficiency that is needed for future HEP projects. Here, we summarize the state of the development of a number of RF sources that promise efficeincies of 80% and above. We also outline future efforts that are needed to fully realize the potential of these sources.