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Louver type sorption pump.
Classified
abstracts
1890-1904
chamber, a hygrometer, and a circulating pump forming a closed airtight system kept at a constant temperature. P T John and R S Sekhon, Indian J Technol, 4,1966, 78-80. 16 1890. The design of gas absorbers. I. Methods for predicting rates of adsorption with chemicalreactionin packedcolumns,and tests with 1.5 in Raschig rings. (Great Britain) P V Danckwets and A J Gillham, Chem Engrs (London), 1966, Z42-154.
19. Radiation
19 1891. Reflectometer for the far ultraviolet. (France) The apparatus and measurements used for the determination of optical constants in the far UV are described. This apparatus has been used for studies of crystals or films evaporated in &cuum and without exposure to air before measurement. M Prioi el al, Le Vide, 123, 1966, 244 (in(French).
II. Vacuum apparatus and auxiliaries 20. Pumping
systems
20 1892. An apparatus for the measurement of areas of a few cm* by the BET method. (France) In this bakeable apparatus of stainless steel and Pyrex, the vacuum obtained is of the order of lo-* torr, measured on a micromanometer and a Pirani gauge. The smallest area measured is 10 cma on tungsten ribbon. V Rudinger and A Cassuto, Le Vide, 123, 1966, 240 (in French). 20 1893. A metal mercury vapour unit for a maximum vacuum of 4 x lo-l2 torr. (USSR) Description of the principle of design of an ultra-high-vacuum Hg vapour unit. The results of an investigation of its characteristics are given. It is also shown that the maximum vacuum obtainable with this unit is determined by the infiltration of hydrogen due to the corrosion of thin-walled bellows in the nitrogen line from the nitrogen caps. A B Tseitlin, Pribory i Tekh, Eksper, 10, 1965, 177 (in Russian). 1894. The performance of silicon monoxide (NAFI-1008) in sing1 chamber vacuum systems. (USA) An evaporation source for deposition of silicon monoxide films is reported to possess high vacuum material capacity and high evaporation rate characteristics. The source design was evaluated in two different laboratory bell jar vacuum systems and was found to be unsatisfactory. W C Underwood, (Naval Avionics Facility, Indianapolis, Indiana), Dee Z965,15 pages. 20 1895. Molecular pumping for ultrahigh-vacu. (USA) Particle accelerators, space simulators, vacuum metaiiizers and other ultrahigh-vacuum systems can now be pumped purely by mechanical systems. The turbomolecular pump prevents oil backstreaming, and pumps all types of gases. Preferential pumping of heavy gases can decontaminate pump and system. A S Dobish, Znstrum and Control Systems, 39 (7), July 1966, 105.
21. Pumps
and pump
fluids
21
1896. Calculation of inclined-plate rotor pumps. (Gernurny) In these centrifugal pumps, a plate with an angle of y” against the centreline of the rotor shaft is rotated in a cylinder having a side opening for discharge. The calculations of p&p perform&e are given as well as the experimental results for different y with water as a pumping medium. A maximum efficiency of 50 per cent is reached withy=O. W Gheroff, Chemiker-Ztg, 90 (6), Z966, 355 (in German). 652
L.
‘1
1897. Louver type sorption pump. (USSR) A pump is described with active charcoal as the sorbent located on a louver at the temperature of liquid N,. The pumping speed was 400 iitres/sec at 1O-5 torr and ultimate pressure was 5x 1Oe8 torr. The quantity of the charcoal was 200 g and its surface was 1,OGUcm’. (USSR) A L Donde, Pribory Tekh Eksper, 11 (3), May-June 1966, 167-168 (in Russian). 21 1898. A high capacity axial inflow turbomolecular pump. (France) The working process of an axial inflow turbomolecular pump is briefly described. The performances obtained with a high capacity machine of the order of 9000 l/set for a range of pressures down to 10-O torr is given. The lowest pressure which has been reached during the tests is 1.4 x lo-l1 torr, though a pressure lower than 5 x lo-” torr has been maintained. L Rub&, Le Vide, 123,1966, 227-234 (in French). 21 1899. The Snecma turbomolecular pump. (France) Discussion of a type of vacuum pump which is gaining wide use. It is defined as “turbomolecular” because it appears as a multistage axial compressor. The operating procedure is described and a simple graphical method is shown with which the representative curve of the pressure ratio versus the inlet offtake may be obtained starting from the operating data of one disc only. Anon, Entropie, 1966, 65-70 (in French).
22. Gauges 22 1900. Refractometric vacuum meter. (USSR) An indicator of gas pressures based on a new principle and operating at 0.1 to 760 torr is described. It is based on recording the magnitude of the refractive index of the decompressed gas. Measurements of small variationsin the indices are accomplished with the aid of two Si ohotoceils. The distribution of the light between these ohotocelis depends on refraction of light rays on
abstracts
1890-1904
chamber, a hygrometer, and a circulating pump forming a closed airtight system kept at a constant temperature. P T John and R S Sekhon, Indian J Technol, 4,1966, 78-80. 16 1890. The design of gas absorbers. I. Methods for predicting rates of adsorption with chemicalreactionin packedcolumns,and tests with 1.5 in Raschig rings. (Great Britain) P V Danckwets and A J Gillham, Chem Engrs (London), 1966, Z42-154.
19. Radiation
19 1891. Reflectometer for the far ultraviolet. (France) The apparatus and measurements used for the determination of optical constants in the far UV are described. This apparatus has been used for studies of crystals or films evaporated in &cuum and without exposure to air before measurement. M Prioi el al, Le Vide, 123, 1966, 244 (in(French).
II. Vacuum apparatus and auxiliaries 20. Pumping
systems
20 1892. An apparatus for the measurement of areas of a few cm* by the BET method. (France) In this bakeable apparatus of stainless steel and Pyrex, the vacuum obtained is of the order of lo-* torr, measured on a micromanometer and a Pirani gauge. The smallest area measured is 10 cma on tungsten ribbon. V Rudinger and A Cassuto, Le Vide, 123, 1966, 240 (in French). 20 1893. A metal mercury vapour unit for a maximum vacuum of 4 x lo-l2 torr. (USSR) Description of the principle of design of an ultra-high-vacuum Hg vapour unit. The results of an investigation of its characteristics are given. It is also shown that the maximum vacuum obtainable with this unit is determined by the infiltration of hydrogen due to the corrosion of thin-walled bellows in the nitrogen line from the nitrogen caps. A B Tseitlin, Pribory i Tekh, Eksper, 10, 1965, 177 (in Russian). 1894. The performance of silicon monoxide (NAFI-1008) in sing1 chamber vacuum systems. (USA) An evaporation source for deposition of silicon monoxide films is reported to possess high vacuum material capacity and high evaporation rate characteristics. The source design was evaluated in two different laboratory bell jar vacuum systems and was found to be unsatisfactory. W C Underwood, (Naval Avionics Facility, Indianapolis, Indiana), Dee Z965,15 pages. 20 1895. Molecular pumping for ultrahigh-vacu. (USA) Particle accelerators, space simulators, vacuum metaiiizers and other ultrahigh-vacuum systems can now be pumped purely by mechanical systems. The turbomolecular pump prevents oil backstreaming, and pumps all types of gases. Preferential pumping of heavy gases can decontaminate pump and system. A S Dobish, Znstrum and Control Systems, 39 (7), July 1966, 105.
21. Pumps
and pump
fluids
21
1896. Calculation of inclined-plate rotor pumps. (Gernurny) In these centrifugal pumps, a plate with an angle of y” against the centreline of the rotor shaft is rotated in a cylinder having a side opening for discharge. The calculations of p&p perform&e are given as well as the experimental results for different y with water as a pumping medium. A maximum efficiency of 50 per cent is reached withy=O. W Gheroff, Chemiker-Ztg, 90 (6), Z966, 355 (in German). 652
L.
‘1
1897. Louver type sorption pump. (USSR) A pump is described with active charcoal as the sorbent located on a louver at the temperature of liquid N,. The pumping speed was 400 iitres/sec at 1O-5 torr and ultimate pressure was 5x 1Oe8 torr. The quantity of the charcoal was 200 g and its surface was 1,OGUcm’. (USSR) A L Donde, Pribory Tekh Eksper, 11 (3), May-June 1966, 167-168 (in Russian). 21 1898. A high capacity axial inflow turbomolecular pump. (France) The working process of an axial inflow turbomolecular pump is briefly described. The performances obtained with a high capacity machine of the order of 9000 l/set for a range of pressures down to 10-O torr is given. The lowest pressure which has been reached during the tests is 1.4 x lo-l1 torr, though a pressure lower than 5 x lo-” torr has been maintained. L Rub&, Le Vide, 123,1966, 227-234 (in French). 21 1899. The Snecma turbomolecular pump. (France) Discussion of a type of vacuum pump which is gaining wide use. It is defined as “turbomolecular” because it appears as a multistage axial compressor. The operating procedure is described and a simple graphical method is shown with which the representative curve of the pressure ratio versus the inlet offtake may be obtained starting from the operating data of one disc only. Anon, Entropie, 1966, 65-70 (in French).
22. Gauges 22 1900. Refractometric vacuum meter. (USSR) An indicator of gas pressures based on a new principle and operating at 0.1 to 760 torr is described. It is based on recording the magnitude of the refractive index of the decompressed gas. Measurements of small variationsin the indices are accomplished with the aid of two Si ohotoceils. The distribution of the light between these ohotocelis depends on refraction of light rays on