Abstract
We describe the calculation and measurement of an electron multiplier concentrator (EMC) that plays the role of a field emission cathode capable of ensuring a significantly greater current density as compared to that provided by the existing electron emitters. Cathodes for powerful devices working in a range more than 100GHz should have the sufficient area (more than 0.1mm2) to provide necessary value of the current. The theory estimate predicts that such EMC can amplify current density and current more than in 100 times. The computer simulations of EMC operation have also been done by means of the ion optics simulation program SIMION 8. In preliminary experiments, the primary electron current density was increased by a factor of 25–30. The possibility of creating integrated circuits based on the proposed device is discussed.
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