- #1
sondreL
- 23
- 0
Hi again , i did some reading about this topic on google and there were only a few articles about it , so I would like to ask you for some advice.I ask this from a previous thread i asked about electrons in vacuum. Could electron field emission technology be used as a high voltage switch were semiconductor device limits are far exceeded ?
as far as I undersand it now the pluses are that vacuum is a good insulator and the control voltage to turn on the field emission is not the full voltage applied between the cathode (tip) and anode (plate) of the field emission device , but only the amount of voltage shortly before the threshold of the field emission and slightly abive it as to reach the level at which a electron current path forms and then again lower the voltage below the threshold to stop the electron emission. Any info on the subject is much appreciatted.
as far as I undersand it now the pluses are that vacuum is a good insulator and the control voltage to turn on the field emission is not the full voltage applied between the cathode (tip) and anode (plate) of the field emission device , but only the amount of voltage shortly before the threshold of the field emission and slightly abive it as to reach the level at which a electron current path forms and then again lower the voltage below the threshold to stop the electron emission. Any info on the subject is much appreciatted.