Question

Hull gave formulae for the cut-off voltage and the cut-off magnetic flux density for a magnetron. Using these Hull expressions calculate the beam voltage V_0, if the inner radius of the magnetron is 0.05m, outer radius is 0.15m and the magnetic flux density is B₀=2mWb.

                                                                                                                               (10 Marks)

b) Calculate the frequency for a cylindrical magnetron having the magnetic flux density of B₀=150µT.                                                                                                                           

Answer 1

solution a=0.05m b=0:15m Bo= rmulb from Hell's formula No. 28992 (? ) 05 1272 VO..4X 100 N X 16 X 1099X 10.15)2 8 X 9:11 X 10-31 ols No= 0.001975854 164 X 100 vos 1.56k v. (3) Frus hull's felmula We eB Mic=16410-198150x106 0 9 .11 X1031 We = 26.345 X 106 217f = 26 345 8106 f = 26.345 x106 211 f = 4.2 MHZ