Thermionic Tubes

Thermistors for the Gradual Application of Heater Voltage to Thermionic Tubes

Thermistors which are thermally-sensitive resistors separately. The separate application and removal of having large negative temperature coefficients of resistance can be power to the individual sectioijs facilitates trouble aptly used for the gradual application of heater voltage to thermionic tubes, thereby diminishing thermal transients and reducing mechanistin andmnizes thener of time thee...

Cid Thermionic Gun System*

A new high-current thermionic gun has been installed on the CID injector at SLAC and brought into operation. The gun and pulser system generate three nanosecond pulses of about six amps peak which, when bunched in the subharmonic buncher system, produce in excess of 1011 electrons in a single S-band accelerated bunch. Preliminary operation of the gun is described, and details of the avalanche c...

eterostrueture Integrated Thermionic Refrigeration

Thermionic emission in heterostructures is investigated for integrated cooling of high power electronic and optoelectronic devices. This evaporative cooling is achieved by selective emission of hot electrons over a barrier layer from the cathode to the anode. As the energy distribution of emitted electrons is almost exclusively on one side of Fermi energy, upon the current flow, strong carrier-...

Low Emittance Thermionic Electron Guns*

Multilayer Thermionic Refrigerator and Generator

A new method of refrigeration is proposed. Cooling is obtained by therm-ionic emission of electrons over periodic barriers in a multilayer geometry. These could be either Schottky barriers between metals and semiconductors or else barriers in a semiconductor superlattice. The same device is an efficient power generator. A complete theory is provided.