High power rf amplifiers for accelerator applications: The large orbit gyrotron and the high current, space charge enhanced relativistic klystron

Conference · Mon Jan 01 00:00:00 EST 1990

OSTI ID:6540384

Stringfield, R M; Fazio, M V; Rickel, D G; Kwan, T J.T.; Peratt, A L; Kinross-Wright, J; Van Haaften, F W; Hoeberling, R F; Faehl, R; Carlsten, B; Destler, W W; Warner, L B

Los Alamos is investigating a number of high power microwave sources for their potential to power advanced accelerators. Included in this investigation are the large orbit gyrotron amplifier and oscillator (LOG) and the relativistic klystron amplifier (RKA). LOG amplifier development is newly underway. Electron beam power levels of 3 GW, 70 ns duration, are planned, with anticipated conversion efficiencies into RF on the order of 20 percent. Ongoing investigations on this device include experimental improvement of the electron beam optics, and computational studies of resonator design and RF extraction. Recent RKA studies have operated at electron beam powers into the device of 1.35 GW in microsecond duration pulses. The device has yielded modulated electron beam power approaching 300 MW using 3--5 kW of RF input drive. RF powers extracted into waveguide have been up to 70 MW, suggesting that more power is available from the device that we have converted to-date in the extractor. We have examined several aspects of operation, including beam bunching phenomena and RF power extraction techniques. In addition, investigations of the amplifier gain as a function of input drive, electron beam parameters and axial magnetic field strength also have been explored. The effect of ions formed during device operation also has been considered.

• Research Organization: Los Alamos National Lab., NM (USA)
• Sponsoring Organization: DOE/AD
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6540384
• Report Number(s): LA-UR-90-3099; CONF-9009123-13; ON: DE91000241
• Resource Relation: Conference: Linear accelerator conference, Albuquerque, NM (USA), 9-14 Sep 1990
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
KLYSTRONS
DESIGN
MICROWAVE AMPLIFIERS
BEAM BUNCHING
BEAM OPTICS
ELECTRON GUNS
LINEAR ACCELERATORS
MAGNETIC FIELDS
RF SYSTEMS
SPACE CHARGE
ACCELERATORS
AMPLIFIERS
BEAM DYNAMICS
ELECTRON TUBES
ELECTRONIC EQUIPMENT
EQUIPMENT
MICROWAVE EQUIPMENT
MICROWAVE TUBES
430303* - Particle Accelerators- Experimental Facilities & Equipment