Electron tube e.g. non-linear traveling wave tube, has spherical surfaces with portions entering ray sphere centered on cathode to coincide axis of electron linear beam with axes of passage

摘要

The tube has a cathode comprising a beam rotation center in axes (Zc, Zc') of the cathode. A microwave frequency structure and an electron cannon (120) comprise spherical surfaces with portions entering a ray sphere (138) centered on the cathode in a contact manner to form an angular adjustment roll (144) of the axis of the cathode and to coincide an axis of an electron linear beam with axes (Zs, Zs') of an circular cylindrical passage of the structure. A tongue (156) is made of nickel alloy and stainless steel and resistant against efforts of atmospheric pressure.