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Spartan Daily, December 5, 1984, San Jose State University, School Of Journalism And Mass Communications
Spartan Daily, December 5, 1984, San Jose State University, School Of Journalism And Mass Communications
Spartan Daily (School of Journalism and Mass Communications)
Volume 83, Issue 63
Spartan Daily, December 4, 1984, San Jose State University, School Of Journalism And Mass Communications
Spartan Daily, December 4, 1984, San Jose State University, School Of Journalism And Mass Communications
Spartan Daily (School of Journalism and Mass Communications)
Volume 83, Issue 62
Computer Programs For Analyzing Certain Classes Of 3-D Electrostatic Fields With Two Planes Of Symmetry, Norm Franzen
Computer Programs For Analyzing Certain Classes Of 3-D Electrostatic Fields With Two Planes Of Symmetry, Norm Franzen
Scanning Electron Microscopy
At Tektronix, two classes of non-rotationally symmetric electrostatic lenses which lead to significant three-dimensional-field problems are currently under investigation. Extensive interactive computer programs have been developed to study these lens structures.
The first class is referred to as Klemperer lipped lenses; the accelerating quadrupole being the most important. Klemperer lenses are formed from shaped concentric cylindrical electrodes and employ two or three independent voltages. These lenses are predominantly of quadrupole type, but possess higher multipoles to correct for geometry distortion.
The second class of lenses, referred to as wafer-lenses, consists of lenses formed from spaced sequences of metal wafer electrodes …