Meritve za optimizacijo merilne glave tipa invertni magnetron
Pregelj, Andrej ...
Razvijamo merilnik na hladno katodo magnetronskega tipa. Senzor sestavljata centralna elektroda - anoda in vakuumsko-tesno ohišje, med katerima je pritisnjena visoka napetost cca 3 kV. Zunaj celice ...je nameščen toroidni magnet, ki je namagneten tako, da njegove silnice potekajo v celici soosno. Ob prisotnosti električnega in magnetnega polja se v celici pojavi električni tok tudi pri zelo nizkih tlakih. Ta tok je v večjem delu merilnega območja (od10[na]-4 mbar navzdol) sorazmeren s tlakom. Pri majhnih tlakih je tako zelo majhen, da ga je že težavno meriti. Zato so testiranja usmerjena v raziskave, kako povečati tok, ki ga daje določena glava. Pri testiranjih smo ugotovili zanimive odvisnosti med tem tokom in oblikovanjem magnetnega polja. V prispevku predstavljamo razvoj senzorja in omenjene poskuse za povečanje ionskega toka.
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