Design and performance of the SSVCO

Conference · Mon Jun 13 00:00:00 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
• Resource Relation: Conference: 4. national high power microwave conference, Monterey, CA, USA, 9 May 1988; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

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