PART I — THE GROAVING NOISE PHENOMENON 853 



3. C. Fried, Noise in Electron Beams, Tech. Rep. 294, Research Laboratory of 



Electronics, M.I.T., May 2, 1955. 

 4 J. R. Pierce and L. R. Walker, Growing Waves Due to Transverse Velocities, 



B.S.T.J., 35, p. 109, Jan., 1956. 



5. G. G. Macfarlane and H. G. Hay, Wave Propagation in a Slipping Stream of 



Electrons: Small Amplitude Theory, Proc. Royal Soc. (B) 63, p. 409, 1950. 



6. C. K. Birdsall, Rippled Wall and Rippled Stream Amplifiers, Proc. I.R.E., 



42, p. 1628, Nov., 1954. 



7. R. W. Peter, S. Bloom, and J. A. Ruetz, Space-Charge-Wave Amplification 



along an Electron Beam by Periodic Change of the Beam Impedance, RCA 

 Rev., 15, p. 113, March, 1954. 



8. T. G. Mihran, Scalloped Beam Amplification, Trans. I.R.E., ED-3, No. 1, p. 



32, Jan., 1956. 



9. R. H. Dicke, The Measurement of Thermal Radiation at Microwave Frequen- 



cies, Rev. Sci. Instr. 17, p. 268, July, 1946. 



10. W. W. Rigrod and J. A. Lewis, Wave Propagation Along a Magnetically- 



Focused Cylindrical Electron Beam, B.S.T.J., 33, p. 399, March, 1954. 



11. G. M. Branch and T. G. Mihran, Plasma Frequency Reduction Factors in 



Electron Beams, LR.E. Trans., ED-2, No. 2, 3, April, 1955. 



12. Informal communication from H. L. McDowell. 



13. Informal communication from J. R. Pierce. 



14. Informal communication from H. Hetfner. 



15. S. Bloom, Space-Charge Waves in a Drifting, Scalloped Beam, unpublished 



RCA Research Laboratories report. 



16. O. E. H. Rydbeck and B. Agdur, Propagation of Space-Charge Waves in 



Guides and Tubes with Periodic Structure, L'Onde Electrique, 34, p. 499, 

 June, 1954. 



17. P. V. Bliokh and Y. B. Feinberg, Space-Charge Waves in Electron Beams 



with Variable Velocity, Zhurnal Tekhn. Fiziki, 26, p. 530, March, 1956. 



18. C. C. Cutler, The Nature of Power Saturation in Traveling Wave Tubes, 



B.S.T.J., 35, p. 841, July, 1956. 



19. S. Lundquist, Subharmonic Oscillations in a Nonlinear System with Positive 



Damping, Quarterly of Appl. Math., 13, No. 3, p. 305, Oct., 1955. 



