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1892. Scattering of potassium by a series of reactive and nonreactive compounds in crossed molecular beams
ClassVIed abstracts 1891-1904 33 1896. Plasma dynamics. (Canada) Brief summaries are presented on current research in plasma dynamics. Studies include: ionization processes behind a strong shock wave in hydrogen; utilization of an electron beam to measure plasma properties; and the use of spectroscopy for plasma diagnostics. Anon, Annual Progress Rep, Toronto Univ, Inst Aerospace Studies, 1966, 7-18.
a plasma slab of relatively uniform density in a magnetic field. Measurements were made at 9.15 GHz of both incoherent emission and coherent fundamental wave propagation, the microwaves propagating in a direction perpendicular to the magnetic field and normal to the slab boundaries. Emission resonances were found for both ordinary and extraordinary wave propagation. Precise measurements of the magnetic field at corresponding peaks for the ordinary and extraordinary waves show that the former occur at magnetic fields about 0.3 per cent lower than the latter, independent of harmonic number, electron density and pressure. The ordinary wave resonances occur at the cyclotron harmonic within experimental error (0.1 per cent). Experimental measurements were obtained at residual pressures of 1O-g torr. S J Tetenbaum, Phys Fluids, 10 (7), Jury 1967, 1577-1583.
33
(Canada) Theoretical and experimental studies were conducted on the reflection process of gas molecules at a satellite surface in extreme altitudes Molecular beams of high intensity and high velocity were developed to simulate the molecular kinetic energies corresponding to satellite flight. Then the molecules in the beam were scattered from carefully prepared monocrystalline surfaces inside ultrahigh vacuum test chambers equipped with ancillary systems to monitor the amount of gas adsorbed on the surfaces being tested. Anon, Annual Progress Rep, Toronto Univ, Inst Aerospace Studies,
33 1891. Nonreactive scattering of K by HBr and DBr in crossed molecular
beams. (USA) The nonreactive scattering of K by HBr and DBr has been measured in crossed molecular beams as a function of relative kinetic energy and for two configurations of the beams and the detector. The effect of averaging over residual energy distributions in the two beam and detector configurations is studied. Chemical reaction affects the nonreactive scattering at large scattering angles. Probabilities of reaction, threshold energies, and total reaction cross sections are obtained from the nonreactive scattering with a simple model used nreviously. J R Airey et al, J Chem Phys, 46 (8), 15th April 1967, 3287-3295.
1966, 75-82. 33 1898. Optical regimes of thermionic emission converters with an
arbitrary number of collisions. Part 1. (USSR) A method of computation is described for the parameters of thermionic emission energy converters, in the case of absence of volume ionization for an arbitrary electron mean free path. S A Maev et al, Zh Tekh Fiz, 37 (6), June 1967,1079-1089 (in Russian).
33 1892. Scattering of potassium by a series of reactive and nonreactive
33 1899. Optimal regimes of thermionic emission converters with an
compounds in crossed molecular beams. (USA) The scattering of potassium by the nonreactive compounds C (CH&, C,H,, (CH&C=C(CH,), and the reactive comoounds CHL Ccl,, SIC],, SnC14, SF,, have been studied in experiments with crossed molecular beams. In each case the nonreactive scattering of velocityselected K was measured as a function of laboratory scattering angle at a number of initial, relative kinetic energies. Probability of reaction, threshold energies, threshold distances, and the energy dependence of the total reaction cross sections are obtained from an interpretation of the measurements. J R Airey et al, J Chem Phys, 46 (9), 1st May 1967, 3295-3305. 33 1893. Experimental investigations of ion-molecule reactions of D,+ with D, and H,. (USA) _ The reactions of D,+ + D,-+D,+ + D and D,+ + H,+CD,H+. H,D+) + (H, D) have been s¨ usine an angular ion-scat&in8 apparatus in which the kinetic-energy distributions of the various product ions have been measured for collision energies in the range 2-15 eV. A mass-analvzed and velocity-selected ion beam was directed into a collision chamber containing tareet gas at low pressure. The product ions are velocity analvzed with a 127” electrostatic velocity selector and mass-analyzed in a quadrunole field rf mass filter. The anqular distributions of the D,+ and D,H+ product ions have also been determined, at urimary beam enereies in the interval 7-11 eV. The mechanisms involved in the various reactions are discussed. L D Doversuike and R L Champion, J Chem Phys, 46 (12), 15th June 1967, 471 g-4725. 33 1894. Klystrons for the Stanford Linear Accelerator Centre. (USA) A brief review is presented on the design and performance of the pulsed S-band klystrons. Included are the mean values of measured power output and an analysis of the information available to date on tube life. J V Lebacqz et al, Rer, SLAC-PUB-208, 1966 (Stanford Univ, Linear Accelerator
Centre,
arbitrary number of collisions. Part 2. (USSR) Analyzing boundary conditions on the cathode the eauations for computing volt-ampere characteristics of thermionic emission energy converters are derived. Some practical recommendations on the operating ranges are given. Yu K Gus’kov et al, Zh Tekh Fiz, 37 (6), June 1967, 1090-I 104 (in Russian). 33 1900. AC Thermionic emission converters.
(Czechoslovakia) The theoretical nossibilities of direct generation of an alternating current in thermionic emission energy converters are discussed. Z Zan, Elektrotech Obzor, 56 (7), July 1967, 366371 (in Czech). 33
1901. Improved contact-less Hall detector for measurement of charged particle beam intensity. (USSR) Two InSb Hall detectors and a ferrite circular concentrator with a very small pap are used for measuring the charged particle beam intensity in the range of 0.1 to 1.000 mA. V I Posodin et al, Pribory Tekh Eksper, 12 (3), May-June 1967, 113-l 14 (in Russian). 33 1902. Device for investigation of electron beams on their periphery.
(USSR) The investigated electron beam is fed through an orifice made in a disc and the number of e&tons falling on the disc (the orifice diameter is less than that of the beam) is measured. Changing the orifice diameter the electron beam parameters in the peripheral areas are measured. N S Zinchenko and I V Lopatin, Pribory Tekh Eksper, 12 (3), MayJune 1967, 32-35 (in Russian/. 33 1903. Optimal magnification of the electrostatic focusing system for
California). 33
1895. Temperature measurements on electron and ion beams.
(USA) The retarding potential method produced temperature measurement accuracies comparable to or better than those possible with the best pyrometers or thermocouples. A graphical method for accurate temperature determination from a recorded energy spectrum is described. As examales, the electron spectrum from a vidicon gun with oxide coated cathode and the ion spectrum from the plasma of a I plane parallel caesium diode are shown. H Hell and B Scott, Reo AFCRL-66-769; AD-643532, 1966 (Hughes Res Labs, Malibu, 626
California).
: 34
1897. Molecular beams and surface interactions.
l
different methods of electron beam deflection. (USSR) The magnification for which the highest resolution of the electron optical system is obtained is calculated from the deflection system defocusing action in the case of deflection by homogeneous electrostatic or magnetic field. A E Gershberg and Z I Kuz’minova, Zh Tekh Fiz, 37 (6), June 1967, 1035-1044 (in Russian). 33 1904. Potential stationary distributions in electron-ion beams emitted
by a cylinder or a sphere. (USSR) The uotential stationarv distribution is calculated for an electron-ion beams emitted by a cilinder or a sphere normally to the emitter, with an arbitrary ion and electron velocity distribution. V M Smimov, Radiotekh Elektron, 12 (5), May 1967, 889-894 ‘a (in Russian).
a plasma slab of relatively uniform density in a magnetic field. Measurements were made at 9.15 GHz of both incoherent emission and coherent fundamental wave propagation, the microwaves propagating in a direction perpendicular to the magnetic field and normal to the slab boundaries. Emission resonances were found for both ordinary and extraordinary wave propagation. Precise measurements of the magnetic field at corresponding peaks for the ordinary and extraordinary waves show that the former occur at magnetic fields about 0.3 per cent lower than the latter, independent of harmonic number, electron density and pressure. The ordinary wave resonances occur at the cyclotron harmonic within experimental error (0.1 per cent). Experimental measurements were obtained at residual pressures of 1O-g torr. S J Tetenbaum, Phys Fluids, 10 (7), Jury 1967, 1577-1583.
33
(Canada) Theoretical and experimental studies were conducted on the reflection process of gas molecules at a satellite surface in extreme altitudes Molecular beams of high intensity and high velocity were developed to simulate the molecular kinetic energies corresponding to satellite flight. Then the molecules in the beam were scattered from carefully prepared monocrystalline surfaces inside ultrahigh vacuum test chambers equipped with ancillary systems to monitor the amount of gas adsorbed on the surfaces being tested. Anon, Annual Progress Rep, Toronto Univ, Inst Aerospace Studies,
33 1891. Nonreactive scattering of K by HBr and DBr in crossed molecular
beams. (USA) The nonreactive scattering of K by HBr and DBr has been measured in crossed molecular beams as a function of relative kinetic energy and for two configurations of the beams and the detector. The effect of averaging over residual energy distributions in the two beam and detector configurations is studied. Chemical reaction affects the nonreactive scattering at large scattering angles. Probabilities of reaction, threshold energies, and total reaction cross sections are obtained from the nonreactive scattering with a simple model used nreviously. J R Airey et al, J Chem Phys, 46 (8), 15th April 1967, 3287-3295.
1966, 75-82. 33 1898. Optical regimes of thermionic emission converters with an
arbitrary number of collisions. Part 1. (USSR) A method of computation is described for the parameters of thermionic emission energy converters, in the case of absence of volume ionization for an arbitrary electron mean free path. S A Maev et al, Zh Tekh Fiz, 37 (6), June 1967,1079-1089 (in Russian).
33 1892. Scattering of potassium by a series of reactive and nonreactive
33 1899. Optimal regimes of thermionic emission converters with an
compounds in crossed molecular beams. (USA) The scattering of potassium by the nonreactive compounds C (CH&, C,H,, (CH&C=C(CH,), and the reactive comoounds CHL Ccl,, SIC],, SnC14, SF,, have been studied in experiments with crossed molecular beams. In each case the nonreactive scattering of velocityselected K was measured as a function of laboratory scattering angle at a number of initial, relative kinetic energies. Probability of reaction, threshold energies, threshold distances, and the energy dependence of the total reaction cross sections are obtained from an interpretation of the measurements. J R Airey et al, J Chem Phys, 46 (9), 1st May 1967, 3295-3305. 33 1893. Experimental investigations of ion-molecule reactions of D,+ with D, and H,. (USA) _ The reactions of D,+ + D,-+D,+ + D and D,+ + H,+CD,H+. H,D+) + (H, D) have been s¨ usine an angular ion-scat&in8 apparatus in which the kinetic-energy distributions of the various product ions have been measured for collision energies in the range 2-15 eV. A mass-analvzed and velocity-selected ion beam was directed into a collision chamber containing tareet gas at low pressure. The product ions are velocity analvzed with a 127” electrostatic velocity selector and mass-analyzed in a quadrunole field rf mass filter. The anqular distributions of the D,+ and D,H+ product ions have also been determined, at urimary beam enereies in the interval 7-11 eV. The mechanisms involved in the various reactions are discussed. L D Doversuike and R L Champion, J Chem Phys, 46 (12), 15th June 1967, 471 g-4725. 33 1894. Klystrons for the Stanford Linear Accelerator Centre. (USA) A brief review is presented on the design and performance of the pulsed S-band klystrons. Included are the mean values of measured power output and an analysis of the information available to date on tube life. J V Lebacqz et al, Rer, SLAC-PUB-208, 1966 (Stanford Univ, Linear Accelerator
Centre,
arbitrary number of collisions. Part 2. (USSR) Analyzing boundary conditions on the cathode the eauations for computing volt-ampere characteristics of thermionic emission energy converters are derived. Some practical recommendations on the operating ranges are given. Yu K Gus’kov et al, Zh Tekh Fiz, 37 (6), June 1967, 1090-I 104 (in Russian). 33 1900. AC Thermionic emission converters.
(Czechoslovakia) The theoretical nossibilities of direct generation of an alternating current in thermionic emission energy converters are discussed. Z Zan, Elektrotech Obzor, 56 (7), July 1967, 366371 (in Czech). 33
1901. Improved contact-less Hall detector for measurement of charged particle beam intensity. (USSR) Two InSb Hall detectors and a ferrite circular concentrator with a very small pap are used for measuring the charged particle beam intensity in the range of 0.1 to 1.000 mA. V I Posodin et al, Pribory Tekh Eksper, 12 (3), May-June 1967, 113-l 14 (in Russian). 33 1902. Device for investigation of electron beams on their periphery.
(USSR) The investigated electron beam is fed through an orifice made in a disc and the number of e&tons falling on the disc (the orifice diameter is less than that of the beam) is measured. Changing the orifice diameter the electron beam parameters in the peripheral areas are measured. N S Zinchenko and I V Lopatin, Pribory Tekh Eksper, 12 (3), MayJune 1967, 32-35 (in Russian/. 33 1903. Optimal magnification of the electrostatic focusing system for
California). 33
1895. Temperature measurements on electron and ion beams.
(USA) The retarding potential method produced temperature measurement accuracies comparable to or better than those possible with the best pyrometers or thermocouples. A graphical method for accurate temperature determination from a recorded energy spectrum is described. As examales, the electron spectrum from a vidicon gun with oxide coated cathode and the ion spectrum from the plasma of a I plane parallel caesium diode are shown. H Hell and B Scott, Reo AFCRL-66-769; AD-643532, 1966 (Hughes Res Labs, Malibu, 626
California).
: 34
1897. Molecular beams and surface interactions.
l
different methods of electron beam deflection. (USSR) The magnification for which the highest resolution of the electron optical system is obtained is calculated from the deflection system defocusing action in the case of deflection by homogeneous electrostatic or magnetic field. A E Gershberg and Z I Kuz’minova, Zh Tekh Fiz, 37 (6), June 1967, 1035-1044 (in Russian). 33 1904. Potential stationary distributions in electron-ion beams emitted
by a cylinder or a sphere. (USSR) The uotential stationarv distribution is calculated for an electron-ion beams emitted by a cilinder or a sphere normally to the emitter, with an arbitrary ion and electron velocity distribution. V M Smimov, Radiotekh Elektron, 12 (5), May 1967, 889-894 ‘a (in Russian).