Production of high power microwaves for particle acceleration with an FEL bunched electron beam

Among the studies in the framework of high gradient linear electron-positro n collider research, the Two-Beam Accelerator (TBA) is a very promising con cept, and two projects are in progress, the Compact Linear Collider project at CERN (W. Schnell, Report no. CERN SL/92-51 and CLIC note 184; K. Hubner , CERN/PS 92-43, CLIC note 176; S. Van der Meer, CERN/PS 89-50, CLIC note 9 7.) and the Relativistic Klystron-TBA project at LBNL (Technical Review Com mittee, International Linear Collider Technical Review Committee Report 199 5, SLAC-R-95-471, 1995). In a TEA an extremely intense low-energy electron beam, called the drive beam, is bunched at the desired operating frequency, and upon passing through resonant cavities generates radio-frequency power for accelerating the main beam. Among the different approaches to the prod uction of a suitable drive beam, the use of an FEL has been proposed and is under active study at CEA/CESTA. (C) 1999 Elsevier Science B.V. All rights reserved.