They are used e . g . in electron microscopes, microwave tubes, electron lithography, electron beam welding, X-Ray tubes, and free electron lasers.
12.
Devices and techniques in which hexaboride cathodes are used include electron microscopes, microwave tubes, electron lithography, electron beam welding, X-ray tubes, and free electron lasers.
13.
The development of centimeter radar during World War 2 and the first high power microwave tubes, the klystron ( 1938 ) and cavity magnetron ( 1940 ), resulted in the first widespread use of waveguide.
14.
In the 1950s Sturrock researched nuclear physics at the Atomic Energy Research Establishment; plasma physics at St . Johns'College, Cambridge; microwave tubes at Stanford University; accelerator physics at the European Organization for Nuclear Research ( CERN ).
15.
The 6AV6 anode-grid capacitance is 2 picofarads ( pF ), the 7768 has a value of 1.7 pF . The close electrode spacing used in microwave tubes " increases " capacitances, but this increase is offset by their overall reduced dimensions compared to lower-frequency tubes.
16.
On leave from the University, he acted as head of the Microwave Tube Research Section of the Hughes Aircraft Company ( 1951 52 ), engaged in research in quantum electronics at the Bell Laboratories, Inc ., Murray Hill, New Jersey ( 1963 64 ) and held Visiting Professorship at the University of California, Santa Cruz and Stanford University.
