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MAGNETIC SYSTEMS OF
TRAVELING WAVE TUBES


Nd-Fe-B magnets of type MAEP30HSs are applied in production of magnetic systems for traveling wave tubes (TWT).

Our Company has developed two following types of such magnetic systems: periodical magnetic focusing systems (see Figure) and combined magnetic systems with alternating regions of periodical and regular components of the magnetic field.
Figure. Design of a periodical focusing system for a traveling wave tube

Figure. Design of a periodical focusing system for a traveling wave tube
Since the general approach to development of such magnetic systems based on Nd-Fe-B magnets has virtually no differences compared to the development of systems based on Sm-Co magnets, we shall not discuss it in detail here.

However, special attention should be paid to the temperature operating conditions of the magnetic systems based on Nd-Fe-B magnets.

In certain cases temperature compensator elements should be included into the design of magnetic systems to ensure the thermal stability of the device. This increases the production cost of such periodical focusing magnetic systems.
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