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13. On the stability of a magnetically compressed plasma surface
18
Classified Abstracts
current to a sudden discharge density passes a critical value.
may occur
when
18 : 32 : 33 10. Viscosity coefficient of a plasma in a magnetic field. Japan. The convergence of Chapman-Enskog’s approximation
to the viscosity coefficient of a plasma is examined by calculations up to the 4th approximation. The viscosity coefficient in the second approximation has sufficient accuracy for practical purposes, its error being at most 5 per cent. (Author) J. Phys. Sot.
Japan,
17 (2), Feb. 1962, 390-392.
18 : 32 : 33 11. Microwave M. Moriyama
19.
the vapour (Author)
W. J. Wijker, Appl. Sci. Res. (B), 9 (l), 1961.
S. Kaneko,
10-28
generation of the second harmonic in a plasma. and M. Sumi, J. Phys. Sot. Japan, 17 (2), Feb.
16. Evaluation of a specially the vacuum ultraviolet.
coated concave
diffraction
P. G. Wilkinson and D. W. Angel, J. Opt. Sot. Amer., Oct. 1962, 1120.
19 grating in 52 (lo),
19 17. Regenerative circulatory multiple-beam interferometry for the study of light-propagation effects. A. H. Rosenthal, J. Opt. Sot. Amer., 52 (lo), Oct. 1962, 1143. 19 18. Methods of altering the characteristics of a multilayer stack. P. W. Baumeister, J. Opt. Sot. Amer., 52 (lo), Oct. 1962, 1149. 19
1962, 397. 18 : 31 : 33 12. Breakdown condition in an azimuthal discharge. T. Uchida, M. Ohnishi and M. Sato, J. Phys. Sot. Japan, 17 (2) Feb. 1962, 399-400. 18 : 32 : 33 13. On the stability of a magnetically compressed plasma surface. M. Sato, J. Phys. Sot. Japan, 17 (2), Feb. 1962, 406-407. 18 : 33 14. High efficiency low-pressure ion source. United St&es. A magnetically confined, oscillating electron bombardment source has been designed which delivers high currents of noble gas ions in the 1 to 10 keV energy range. The energy spread of the beam was 2 + 1 eV using an anode potential of 45 V. Pressure in the source chamber was measured during source operation so that accurate gas efficiency measurements could be made. The optimum gas efficiency obtained for argon at 5 kV extraction potential and an operating pressure of 4 x lo-’ torr was 59 per cent. Mass analysis of source output showed that when the source was operated with research grade argon (99.999 per cent pure) impurity ions in the beam consisted of only 0.5 per cent Nz+, 0.75 per cent O,+, 0.75 per cent H,O+ Filament life is extremely long, well and 0.70 per cent Art+. over 750 hr. Analysis of ion production rate and plasma density ,shows that a large contribution to electron emission is made by the secondary electrons produced at the tungsten filament due to positive ion bombardment. The secondary electron emission current was found to be as much as 30 per cent of the true thermionic emission current and is not negligible as (Authors) previous investigators have assumed. C. E. Carlston and G. D. Magnuson, Sept. 1962, 905-911.
Rev. Sci. Instrum.,
33 (9),
19. Electron-optical image of a pulsed atomic beam. K. A. McCarthy, J. Opt. Sot. Amer., 52 (lo), Oct. 1962, 1187. 19 20. Fast high-sensitivity silicon photodlodes. R. L. Williams, J. Opt. Sot. Amer., 52 (1 l), Nov. 1962, 1237. 19 21. Infrared reflectance of evaporated aluminum films. H. E. Bennett, J. M. Bennett and E. J. Ashley, J. Opt. Amer., 52 (ll), Nov. 1962, 1245.
tivity in a magnetic shock tube is treated when the driving magnetic field is very strong and varies with time, being induced by the current discharge from capacitors. Two cases are treated ; one is the one-dimensional flow with a planar current sheet perpendicular to the flow, and the other is the cylindrically expanding flow with a cylindrical current sheet. The problem is analogous to the hypersonic flow past a slender body, and similarity solutions exist if the driving magnetic field varies proportionally to tk-1 (t is the time). Numerical results for several values of k are presented. For a general case when the magnetic field varies as an arbitrary function of time, an approximate method of calculation by using the concept of local (Author) similarity is also presented. J. Phys. Sot.
Jupun, 17 (9) Sept. 1962, 1488-1496.
Sot.
19 22. Total reflectances of opaque diffusers. W. R. Blevin and W. J. Brown, J. Opt. Nov. 1962, 1250.
Sot.
Amer.,
52 (ll),
19 23. Temperature of high frequency corona and torch discharges in their transition region. R. Dzhumakuliev and A. M. Devyatov, Optics & Spectrosc., 13 (I), July 1962, 11. 19 24. On the temperature
and thermal equilibrium
in the arc burning
in insert gases.
R. R. Shvangiradze,
K. A. Oganezov
Optics
13 (I), July 1962, 14.
& Spectrosc.,
and B. Ya. Chikhladze,
19 25. Effect of the medium on the properties of the electron spectra of complex molecules during gradual transition from vapor to solution. B. S. Neporent, N. G. Bakhshiev, V. A. Lavrow and S. M. Korotkov, Optics & Spectrosc., 13 (l), July 1962, 18.
18 : 32 : 33 15. Theory of the magnetic shock tube with varying driving magnetic field. Japan. The inviscid flow of an ionized gas with infinite conduc-
M. Yasuhara,
Radiation
19 26. Measurement
of the quantum yields of sensitized phosphorescence as a method of investigating the quenching processes at the triplet level of organic molecules. V. L. Ermolaev, Optics & Spectrosc., 13 (l), July 1962,49.
19 27. Luminescence kinetics of chromium phosphors II. Gallium oxide Part 2 : Relaxation spectra and reabsorption. N. A. Tolstoi and Liu Shun-Fu, Optics & Spectrosc., 13 (l), July 1962, 61. 19 28. Relaxation luminescence spectra of uranium activated alkali and alkali earth metal fluorides. N. A. Tolstoi and Lui Shun-Fu, Optics & Spectrosc., 13 (I), July 1962, 61.
Classified Abstracts
current to a sudden discharge density passes a critical value.
may occur
when
18 : 32 : 33 10. Viscosity coefficient of a plasma in a magnetic field. Japan. The convergence of Chapman-Enskog’s approximation
to the viscosity coefficient of a plasma is examined by calculations up to the 4th approximation. The viscosity coefficient in the second approximation has sufficient accuracy for practical purposes, its error being at most 5 per cent. (Author) J. Phys. Sot.
Japan,
17 (2), Feb. 1962, 390-392.
18 : 32 : 33 11. Microwave M. Moriyama
19.
the vapour (Author)
W. J. Wijker, Appl. Sci. Res. (B), 9 (l), 1961.
S. Kaneko,
10-28
generation of the second harmonic in a plasma. and M. Sumi, J. Phys. Sot. Japan, 17 (2), Feb.
16. Evaluation of a specially the vacuum ultraviolet.
coated concave
diffraction
P. G. Wilkinson and D. W. Angel, J. Opt. Sot. Amer., Oct. 1962, 1120.
19 grating in 52 (lo),
19 17. Regenerative circulatory multiple-beam interferometry for the study of light-propagation effects. A. H. Rosenthal, J. Opt. Sot. Amer., 52 (lo), Oct. 1962, 1143. 19 18. Methods of altering the characteristics of a multilayer stack. P. W. Baumeister, J. Opt. Sot. Amer., 52 (lo), Oct. 1962, 1149. 19
1962, 397. 18 : 31 : 33 12. Breakdown condition in an azimuthal discharge. T. Uchida, M. Ohnishi and M. Sato, J. Phys. Sot. Japan, 17 (2) Feb. 1962, 399-400. 18 : 32 : 33 13. On the stability of a magnetically compressed plasma surface. M. Sato, J. Phys. Sot. Japan, 17 (2), Feb. 1962, 406-407. 18 : 33 14. High efficiency low-pressure ion source. United St&es. A magnetically confined, oscillating electron bombardment source has been designed which delivers high currents of noble gas ions in the 1 to 10 keV energy range. The energy spread of the beam was 2 + 1 eV using an anode potential of 45 V. Pressure in the source chamber was measured during source operation so that accurate gas efficiency measurements could be made. The optimum gas efficiency obtained for argon at 5 kV extraction potential and an operating pressure of 4 x lo-’ torr was 59 per cent. Mass analysis of source output showed that when the source was operated with research grade argon (99.999 per cent pure) impurity ions in the beam consisted of only 0.5 per cent Nz+, 0.75 per cent O,+, 0.75 per cent H,O+ Filament life is extremely long, well and 0.70 per cent Art+. over 750 hr. Analysis of ion production rate and plasma density ,shows that a large contribution to electron emission is made by the secondary electrons produced at the tungsten filament due to positive ion bombardment. The secondary electron emission current was found to be as much as 30 per cent of the true thermionic emission current and is not negligible as (Authors) previous investigators have assumed. C. E. Carlston and G. D. Magnuson, Sept. 1962, 905-911.
Rev. Sci. Instrum.,
33 (9),
19. Electron-optical image of a pulsed atomic beam. K. A. McCarthy, J. Opt. Sot. Amer., 52 (lo), Oct. 1962, 1187. 19 20. Fast high-sensitivity silicon photodlodes. R. L. Williams, J. Opt. Sot. Amer., 52 (1 l), Nov. 1962, 1237. 19 21. Infrared reflectance of evaporated aluminum films. H. E. Bennett, J. M. Bennett and E. J. Ashley, J. Opt. Amer., 52 (ll), Nov. 1962, 1245.
tivity in a magnetic shock tube is treated when the driving magnetic field is very strong and varies with time, being induced by the current discharge from capacitors. Two cases are treated ; one is the one-dimensional flow with a planar current sheet perpendicular to the flow, and the other is the cylindrically expanding flow with a cylindrical current sheet. The problem is analogous to the hypersonic flow past a slender body, and similarity solutions exist if the driving magnetic field varies proportionally to tk-1 (t is the time). Numerical results for several values of k are presented. For a general case when the magnetic field varies as an arbitrary function of time, an approximate method of calculation by using the concept of local (Author) similarity is also presented. J. Phys. Sot.
Jupun, 17 (9) Sept. 1962, 1488-1496.
Sot.
19 22. Total reflectances of opaque diffusers. W. R. Blevin and W. J. Brown, J. Opt. Nov. 1962, 1250.
Sot.
Amer.,
52 (ll),
19 23. Temperature of high frequency corona and torch discharges in their transition region. R. Dzhumakuliev and A. M. Devyatov, Optics & Spectrosc., 13 (I), July 1962, 11. 19 24. On the temperature
and thermal equilibrium
in the arc burning
in insert gases.
R. R. Shvangiradze,
K. A. Oganezov
Optics
13 (I), July 1962, 14.
& Spectrosc.,
and B. Ya. Chikhladze,
19 25. Effect of the medium on the properties of the electron spectra of complex molecules during gradual transition from vapor to solution. B. S. Neporent, N. G. Bakhshiev, V. A. Lavrow and S. M. Korotkov, Optics & Spectrosc., 13 (l), July 1962, 18.
18 : 32 : 33 15. Theory of the magnetic shock tube with varying driving magnetic field. Japan. The inviscid flow of an ionized gas with infinite conduc-
M. Yasuhara,
Radiation
19 26. Measurement
of the quantum yields of sensitized phosphorescence as a method of investigating the quenching processes at the triplet level of organic molecules. V. L. Ermolaev, Optics & Spectrosc., 13 (l), July 1962,49.
19 27. Luminescence kinetics of chromium phosphors II. Gallium oxide Part 2 : Relaxation spectra and reabsorption. N. A. Tolstoi and Liu Shun-Fu, Optics & Spectrosc., 13 (l), July 1962, 61. 19 28. Relaxation luminescence spectra of uranium activated alkali and alkali earth metal fluorides. N. A. Tolstoi and Lui Shun-Fu, Optics & Spectrosc., 13 (I), July 1962, 61.