Accession Number : AD0431861


Title :   MEASUREMENT OF FIELDS IN THE PLASMA SHEATH BY AN ELECTRON BEAM PROBING TECHNIQUE,


Corporate Author : STANFORD UNIV CALIF MICROWAVE LAB


Personal Author(s) : Harp,R ; Kino,G S


Report Date : Jan 1964


Pagination or Media Count : 23


Abstract : An experiment to measure both rf and dc fields in the sheath is described. The fields are determined by finding the deflection of an electron beam passed parallel to the sheath plasma interface. The sheath is which these experiments were done was formed in a low density plasma on a metal plate inserted into the plasma. Both the dc field variation and the rf field variation through the sheath when an rf potential was applied to the plate were measured. The dc field variation is in good agreement with a theory by Self. The measured rf field variations are in good agreement with a theory given by Pavkovich in an accompanying paper. No selfoscillations of any kind were measured in the sheath. This is thought to be due to a good Maxwellian distribution of electron velocities obtained by careful design of the discharge electrodes. (Author)


Descriptors :   *PLASMA SHEATHS , *ELECTRON BEAMS , METAL PLATES , ELECTROMAGNETIC PROBES , DEFLECTION , MEASUREMENT , ELECTRIC FIELDS , RADIOFREQUENCY , DIRECT CURRENT , ELECTRODES , RECORDING SYSTEMS , MAGNETIC FIELDS , DEFLECTION COILS


Distribution Statement : APPROVED FOR PUBLIC RELEASE