SPARK GAP SWITCHES FOR RADAR 



567 



CORONA ESTABLISHED 

 ON POINT 



V=8000 _ V=500 



E = 32,000V/CM E = 10,000 V/CM 



V=2000 

 E = 8000 V/CM 



600 X 10"^ 100 X 10'^ 



SECONDS AFTER PREVIOUS SPARK 



Fig. .S- — Above, perspective drawing of rotar\- s»ip showing arrangement o£ corona 

 points. Below, diagram showing voltage (l), and mean voltage gradient (E) at various 

 times in the spark-over region. 



base as the ll.xed electrodes. The moving electrodes pass between the fixed 

 electrodes and their associated corona points. This arrangement is clarified 

 in the diagram which is a section through a plane normal to the electrode 



