- Email: [email protected]
263. Vaporization study of the titanium-tellurium system
C l a s s i f i e d a b s t r a c t s 258-266 collector, very high speed scanning for the study of rapid pressure changes, and application of counting techniques to the analysis of residual gases. A Richardt and L Urbaniak, Le Vide, 123, May-June 1966, 191-197
(in French). 47 258. Analysis of residual gases on different vacuum systems by mass spectrometry. (France) A brief description of the Thomson T H - N 205 mass spectrometer is given, and some experiments in ultrahigh vacuum using a mercury diffusion pump, and an ionic pump discussed. The results are compared to those obtained with a classic vacuum device. G Bernard et al, Le Vide, 123, May-June, 1966, 207-211 (in French). 47 259. Analysis of residual gases above a diffusion pump in an ultrahigh vacuum system. (France) With the use of a quadrupole mass spectrometer, the composition of the residual gases has been examined. The pumping stations were equipped with oil diffusion pumps, and it was of special interest to see whether these pumps could influence the quality of the vacuum. To eliminate the effect of tubulation between system and measuring device, the quadrupole mass spectrometer was equipped with a nude ion source. Experimental results are given and discussed. W K Huber, Le Vide, 123, May-June 1966, 202-206 (in French). 47 260. Effect of baking and trapping on the mass spectral analysis of residual gases. (France) The work described in this paper was done using an AEI MS10 mass spectrometer. It is bakeable, fitted with rhenium filament source, and has a sensitivity on nitrogen of 5 × 10-12 torr. Vacuum equipment included a diffusion pump, and cold traps at --20, --80, and -- 196°C. Measurement of the spectra of residual gases was made without baking at 100°C, baking at 200°C, baking at 300°C. These effects were measured on atomic masses 2, 14, 15, 16, 18, 29, 41, 43, 44. D K Leaden and E Harden, Le VMe, 123, May-June 1966, 198-201
diffusion coefficient was derived. Using this equation a permeation constant of 5.1 × 10-9 (cc STP) mm/sec/cm2/cm Hg was calculated. E F Cuddihy and J Moaeanin, Rep NASA-CRy59727, JPL-TR-32-
840, Dec 1965, Jet Propulsion Lab, Calif Inst of Tech, Pasadena. 47 263. Vaporization study of the titanium-tellurium system. (USA) Vaporisation of Ti tellurides was studied by using the Knudsen effusion technique in conjunction with a mass spectrometer and with a vacuum balance. Vapour pressure measurements as a function of temperature and composition permitted the calculation of thermodynamic properties for the condensed phases. A Suzuki and P G Wahlbeek, J Phys Chem, 70, 1966, 1914-1923. 47 264. Vapour pressure and heat of sublimation of rhenium. (USA) The vapour pressure of rhenium was measured between 2350 and 3050°K by the Langmiur method, using a vacuum microbalance. E R Plante and R Szwarc, J Res Natl Bur Std, 70A, 1966, 175-179. 47 265. Contuminants----outgassing and sublimation in vaeuo. (USA) This paper described some of the mechanisms involved and outlines cleaning procedures which have been successfully used to reduce contamination effects. S Giles, lnst Environmental Sciences, Annual Tech Meeting, San Diego,
California, April 1966.
49. Miscellaneous materials and techniques 49
266. Apparatus for determining creep behaviour under conditions of ultra high vacuum. (USA) A system for determining the creep behaviour of refractory metals at temperatures up to 1900°C and at environmental test pressures of less than 10-8 torr are described. Results are presented which show that contamination of a tantalum alloy test specimen is inhibited when tested at 1370°C and 10-8 torr. R W Buckman and J S Hetherington, Rev Sci lnstrum, 37 (8), 1966,
(in French).
999-1003.
47 261. Simple procedure for measurement of Hg vapour pressure of amalgams. (USA) A simple, relatively accurate method for determining the mercury pressure of amalgams at elevated temperatures is described. The transmission of 2537 A radiation through an evacuated quartz optical cell containing the amalgam is compared with that of a similar cell containing only Hg, using a spectroradiometer. The Hg vapour of the amalgam is found by determining the temperature at which the Hg cell shows the same transmission as the amalgam, and reference to a table of Hg vapour pressure versus temperature. J M Margolis, Rev Sci lnstrum, 37, July 1966, 895~96. 47 262. Outgassing rates in polymeric foams. (USA) Diffusion rates for carbon dioxide were determined on closed-cell polyurethane foams of varying densities by monitoring for two to three weeks the loss of weight from specimens suspended in a vacuum of 10-7 torr. The experimental data were used to calculate diffusion coefficients for these materials, which were found to be of the order of l0 -6 to 10-5 cm2/sec between 22 and 81°C. The equation of the
56. Electrical engineering, electronic circuits, electrical devices 56 : 22 Errors of transistor parts of spectrometer amplifiers. See abstract number 76. 56 : 30 Thin films in electronics and eleetroteehnics. See abstract number 168.
58. Nucleonics 58 : 16 Structure and adsorption properties of zeolites investigated by means of nuclear gamma-resonance (a method based on M6ssbauer effect). See abstract number 13. 58 : 30 Preparation of Ra 226 backing. See abstract number 168.
64. Book reviews, symposia programmes and reports 64:18 7th International Conference on Ionized Gases. See abstract number 39.
69
(in French). 47 258. Analysis of residual gases on different vacuum systems by mass spectrometry. (France) A brief description of the Thomson T H - N 205 mass spectrometer is given, and some experiments in ultrahigh vacuum using a mercury diffusion pump, and an ionic pump discussed. The results are compared to those obtained with a classic vacuum device. G Bernard et al, Le Vide, 123, May-June, 1966, 207-211 (in French). 47 259. Analysis of residual gases above a diffusion pump in an ultrahigh vacuum system. (France) With the use of a quadrupole mass spectrometer, the composition of the residual gases has been examined. The pumping stations were equipped with oil diffusion pumps, and it was of special interest to see whether these pumps could influence the quality of the vacuum. To eliminate the effect of tubulation between system and measuring device, the quadrupole mass spectrometer was equipped with a nude ion source. Experimental results are given and discussed. W K Huber, Le Vide, 123, May-June 1966, 202-206 (in French). 47 260. Effect of baking and trapping on the mass spectral analysis of residual gases. (France) The work described in this paper was done using an AEI MS10 mass spectrometer. It is bakeable, fitted with rhenium filament source, and has a sensitivity on nitrogen of 5 × 10-12 torr. Vacuum equipment included a diffusion pump, and cold traps at --20, --80, and -- 196°C. Measurement of the spectra of residual gases was made without baking at 100°C, baking at 200°C, baking at 300°C. These effects were measured on atomic masses 2, 14, 15, 16, 18, 29, 41, 43, 44. D K Leaden and E Harden, Le VMe, 123, May-June 1966, 198-201
diffusion coefficient was derived. Using this equation a permeation constant of 5.1 × 10-9 (cc STP) mm/sec/cm2/cm Hg was calculated. E F Cuddihy and J Moaeanin, Rep NASA-CRy59727, JPL-TR-32-
840, Dec 1965, Jet Propulsion Lab, Calif Inst of Tech, Pasadena. 47 263. Vaporization study of the titanium-tellurium system. (USA) Vaporisation of Ti tellurides was studied by using the Knudsen effusion technique in conjunction with a mass spectrometer and with a vacuum balance. Vapour pressure measurements as a function of temperature and composition permitted the calculation of thermodynamic properties for the condensed phases. A Suzuki and P G Wahlbeek, J Phys Chem, 70, 1966, 1914-1923. 47 264. Vapour pressure and heat of sublimation of rhenium. (USA) The vapour pressure of rhenium was measured between 2350 and 3050°K by the Langmiur method, using a vacuum microbalance. E R Plante and R Szwarc, J Res Natl Bur Std, 70A, 1966, 175-179. 47 265. Contuminants----outgassing and sublimation in vaeuo. (USA) This paper described some of the mechanisms involved and outlines cleaning procedures which have been successfully used to reduce contamination effects. S Giles, lnst Environmental Sciences, Annual Tech Meeting, San Diego,
California, April 1966.
49. Miscellaneous materials and techniques 49
266. Apparatus for determining creep behaviour under conditions of ultra high vacuum. (USA) A system for determining the creep behaviour of refractory metals at temperatures up to 1900°C and at environmental test pressures of less than 10-8 torr are described. Results are presented which show that contamination of a tantalum alloy test specimen is inhibited when tested at 1370°C and 10-8 torr. R W Buckman and J S Hetherington, Rev Sci lnstrum, 37 (8), 1966,
(in French).
999-1003.
47 261. Simple procedure for measurement of Hg vapour pressure of amalgams. (USA) A simple, relatively accurate method for determining the mercury pressure of amalgams at elevated temperatures is described. The transmission of 2537 A radiation through an evacuated quartz optical cell containing the amalgam is compared with that of a similar cell containing only Hg, using a spectroradiometer. The Hg vapour of the amalgam is found by determining the temperature at which the Hg cell shows the same transmission as the amalgam, and reference to a table of Hg vapour pressure versus temperature. J M Margolis, Rev Sci lnstrum, 37, July 1966, 895~96. 47 262. Outgassing rates in polymeric foams. (USA) Diffusion rates for carbon dioxide were determined on closed-cell polyurethane foams of varying densities by monitoring for two to three weeks the loss of weight from specimens suspended in a vacuum of 10-7 torr. The experimental data were used to calculate diffusion coefficients for these materials, which were found to be of the order of l0 -6 to 10-5 cm2/sec between 22 and 81°C. The equation of the
56. Electrical engineering, electronic circuits, electrical devices 56 : 22 Errors of transistor parts of spectrometer amplifiers. See abstract number 76. 56 : 30 Thin films in electronics and eleetroteehnics. See abstract number 168.
58. Nucleonics 58 : 16 Structure and adsorption properties of zeolites investigated by means of nuclear gamma-resonance (a method based on M6ssbauer effect). See abstract number 13. 58 : 30 Preparation of Ra 226 backing. See abstract number 168.
64. Book reviews, symposia programmes and reports 64:18 7th International Conference on Ionized Gases. See abstract number 39.
69