Design and performance of the SSVCO

Conference · Mon Jun 13 04:00:00 EDT 1988

OSTI ID:7030243

Poulsen, P; Morrison, J J; Chase, J B; Domning, E E; Hawke, R S; Takemori, H T; Vogtlin, G E

A magnetized and tunable virtual cathode oscillator with radial extraction of RF power (SSVCO) has been constructed. The diagnostic chamber guides the RF power to an array of orthogonal sets of dipole antennas which provide accurate power measurement over a wide range of power, polarization, frequencies, and directions of the incident power. The vacuum chamber incorporates liquid nitrogen pumping which, in combination with prepulsing the beam, substantially extends the RF pulse duration and the delivered energy. The results indicate that ions formed at the anode surface will flow into the electron beam, causing space charge neutralization, and terminating the RF pulse. Cleaning the system by prepulsing and pumping decreases the rate of ion formation and extends the RF pulse. Conditions for which the reflexing and the beam frequency are equal have been found to produce instantaneous efficiencies of RF production as high as 20%. 3 refs., 10 figs.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 7030243
• Report Number(s): UCRL-98910; CONF-8805132-10; ON: DE88012435
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420200* -- Engineering-- Facilities
Equipment
& Techniques
ANTENNAS
BEAMS
CATHODES
CONTAINERS
DESIGN
EFFICIENCY
ELECTRICAL EQUIPMENT
ELECTRODES
ELECTRON BEAMS
ELECTRONIC EQUIPMENT
EQUIPMENT
FREQUENCY DEPENDENCE
LEPTON BEAMS
MAGNETIC FIELDS
OSCILLATORS
PARTICLE BEAMS
PERFORMANCE
PRESSURE VESSELS
RF SYSTEMS
SPACE CHARGE