FIELD: quantum electronics. SUBSTANCE: tube has cathode and anode assemblies and gaseous-discharge gap formed by part of sectionalized cement envelope accommodating cup-shaped elements provided with coupling holes, spatial locking, and thermal contact with envelope and spatial discharge limiter; introduced in addition is thermal and insulating open circuit between cup-shaped element and its dummy extension (connector). Cup-shaped elements have, in addition, reliable contact with inner surface of section ceramic insulator and reliable spatial locking. In order to dispense with external bypass channels, additional internal bypass channels are organized in long discharge tubes to inter connect anode and cathode assemblies; they have guaranteed thermal contacts with connectors and guaranteed thermal gaps with cup-shaped elements and discharge limiters. EFFECT: simplified design of discharge tube. 2 cl, 2 dwg
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