Title :
W-band sheet beam Extended Interaction Klystron (EIK)
Author :
Pasour, John ; Nguyen, Khanh ; Wright, Edward ; Balkcum, Adam ; Levush, Baruch
Author_Institution :
Vacuum Electron. Branch, US Naval Res. Lab., Washington, DC, USA
Abstract :
A sheet-beam Extended Interaction Klystron (EIK) is being developed at W-band to demonstrate the enhanced power capability, compactness, and relatively high gain per unit length that have been predicted for the device. The EIK is powered by a 19.5-kV, 3.3-A sheet beam having dimensions of 0.32 mm × 4 mm. A beamstick for the device has achieved 98% current transport efficiency over a distance of 2 cm in a uniform magnetic field of 8.5 kG. Particle-in-cell simulations using MAGIC-3D and ICEPIC have predicted saturated output power of almost 10 kW from the EIK. A 3-cavity version of the device is predicted to have a saturated gain of >;30 dB with an interaction efficiency of ~16%. The spent-beam energy distribution is compatible with a depressed collector that can increase the overall efficiency to >;30%.
Keywords :
circuit simulation; klystrons; magnetic fields; millimetre wave amplifiers; millimetre wave tubes; EIK; ICEPIC simulation; MAGIC-3D simulation; W-band sheet beam extended interaction klystron; beamstick; current 3.3 A; current transport efficiency; particle-in-cell simulation; spent-beam energy distribution; uniform magnetic field; voltage 19.5 kV; Cathodes; Cavity resonators; Couplings; Fabrication; Gain; Klystrons; Power generation; EIK; ICEPIC; MAGIC; Sheet beam; amplifier; millimeter wave; vacuum electronic;
Conference_Titel :
Vacuum Electronics Conference (IVEC), 2011 IEEE International
Conference_Location :
Bangalore
Print_ISBN :
978-1-4244-8662-5
DOI :
10.1109/IVEC.2011.5746888
