| 摘要 |
FIELD: electricity. ^ SUBSTANCE: cathode-heating unit comprises a cylindrical core, in the end of which there is a pellet of an emitting substance, a heater, a circular anisotropic pyrolytic graphite holder, a heater insulator, a support flange, a current lead insulator. At the same time the core holder is made in the form of a sleeve, where the heater insulator is inserted, and the pellet of the emitting substance rests on the core holder via a graphite bushing, and the circular pyrolytic anisotropic holder is extended to the end surface of the core holder. ^ EFFECT: increased service life of the cathode-heating unit with reduction of consumed capacity, simplified design. ^ 3 cl, 4 dwg |
