1346 THE BELL SYSTEM TECHNICAL JOURNAL, NOVEMBER 1956 



Tc cathode radius 



r95 radius at the beam minimum through which 95 per cent of t 



current flows 



(7 standard deviation of electron trajectory 



Tk cathode temperature 



Va accelerator voltage 



Vn helix voltage 



Vc collector voltage 



X growng wave parameter from Pierce 



CO radian frequency 



oic carrier radian frequency 



ojm modulating signal radian frequency 



ojp radian plasma frequency 



cog corrected radian plasma frequency 



c compression factor 



kp AM-to-PM conversion factor 



7 radial propagation constant 



References 



1. Cutler, C. C, Spurious Modulation of Electron Beams, Proc. I.R.E., 44, , 



pp. 61-64, Jan., 1956. 



2. Danielson, W. E., Rosenfeld, J. L., and Saloom, J. A., A Detailed Analysis of " 



Beam Formation with Electron Guns of the Pierce Type, B. S.T.J. 35, pp. 

 375-420, March, 1956. 



3. Augustine, C. F., and Slocum, A., 6KMC Phase Measurement System For 



Traveling-Wave Tubes, I.R.E. Trans. PGI-4, Oct., 1955. 



4. Tien, P. K., A Large Signal Theory of Traveling-Wave Amplifiers, B.S.T.J., 



35, pp. 349-374, March, 1956. 



5. Brangaccio, D. J., and Cutler, C. C, Factors Affecting Traveling-Wave Tube 



Power Capacity, I.R.E. Trans. PGED-3, June, 1953. 



6. Smullin, L. D., and Fried, C, Microwave Noise Measurements on Electron 



Beams, I.R.E. Trans., PGED-4, Dec, 1954. 



7. Pierce, J. R., Traveling-Wave Tubes, D. Van Nostrand, Inc., 1950. 



8. Tien, F*. K., Traveling-Wave Tube Helix Impedance, Proc. I.R.E., 41, pp. 



1617-1623, Nov., 1953. 



9. Watkins, D. A., Traveling-Wave Tube Noise Figure, Proc. I.R.E., 40, pp. 



65-70, Jan., 1952. 

 10. Pierce, J. R., Theory and Design of Electron Beams, D. Van Nostrand, Inc., 

 1949. 



