1. Super High-Power Microwave Semiconductor Switches S. Tantawi F. Tamura

2. Port 3 (TE 01 ) Port 1 (TE 01 ) Port 2 (TE 01 ) Garnet TE 01 and TE 02 TE 01 or TE 02 Circulator/Switch Configuration New Concepts for Overmoded Nonreciprocal Devices Theory Predictions at X-band S. Tantawi

3. Study of Breakdown in High Power Waveguides Experimental setupGeometry of the waveguideA breakdown Event x - rays incident transmitted reflected 3D PIC simulations of the breakdown Energy of copper ions Erosion power absorbed by the emitting area S. Tantawi and V. Dolgashev

4. Projection of phase space on the (r,z) plane Incident, reflected and transmitted RF power vs time Current through the upstream and downstream beam pipe Erosion current absorbed by the emitting area and by the area opposite to the emitting area Erosion power absorbed by the emitting area and by the area opposite to the emitting area Study of Breakdown in Traveling Wave Structure Using 3D PIC Code Projection of phase space on the (x,y) plane V. Dolgashev

5. 2D Simulation of High-Efficiency Cross-Field RF Power Sources Geometry of L-band magnetron, frequency 915MHz, simulated electron efficiency 90% (in agreement with experimental Data) X-band magnetron, frequency 9.3 GHz, simulated electron efficiency 70% S. Tantawi and V. Dolgashev

6. Advanced Multimoded High-Power RF Component Development for Pulse Compression Systems Dual-moded eight-feed DLDS for NLC. “Magic-H hybrid tap-off for distribution of rf to multiple structures Directional coupler circuit for feeding ten SW structures. Dual-moded DLDS head for power combining and directing. from klystrons to delay lines S.G. Tantawi and C.D. Nantista to structure

7. cross-potent superhybrid combiner/launcher rectangular circular mode transducer/taper mode-selective extractor TE 10 : TE 20 : S.G. Tantawi and C.D. Nantista Toward a four-mode system. TE 10 TE 11 TE 20 TE 01 to continuing delay line to accelerator feed