Mutual synchronization of a chain of resistance-coupled self-excited oscillators

the interaction we have considered here might occur. With the appropriate choice of parameters of the beam and the plasma, the gas pressure may vary from 10 -2 torr up to i0 atm [8]. In view of this, we assume that the pressure in our case is p = 0.I torr, and the gas temperature T is =0.03 eV. Then No ~ 7 x 1012 cm -3 ~ = 1.5 x i0 ~I Hz, j~21 1 D and (~m/~) 2 ~ 10 -6 [7] It follows from condition (i) that the density of singly charged ions and electrons in the plasma must be of order neo ~ 7 x 1012 cm -3. From this it follows that the inequality Q >> 1 is satisfied if (nbo/neo) 10 -4 .