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Prevention of Parasitic Oscillations in Electron Beam Tubes

The  innovation  relates  to  a  device  for preventing  parasitic  oscillations  in  electron beam  tubes.  It  comprises  a  beam  tunnel subject  to  an  axial  static  magnetic  field.  The  tunnel  is  equipped  with  ceramic  and  metal rings arranged alternately in the axial direction. These rings yield a structure on the inner surface preventing the harmonic rise of spurious oscillations that could otherwise  damage  the  tube.  The  technology  is  ready  for  use  in  the  non-­‐fusion  domain and was patented by the inventors Manfred Thumm and Gerd Gantenbein.

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