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A device for the stabilization of pressures in the region of 1 torr
Classified Abstracts 109--120
Classified A b s t r a c t s Abstracting Editor's Note. The label immediately following the title o f each item denotes country o f origin o f publication, and that at the end o f each abstract indicates country o f origin o f work (where known).
General Vacuum Science and Engineering 10.
One of these has already been briefly discussed by Gaede twentyfive years ago. In principle, it is possible to construct a thermopump. The second application concerns throttling the p u m p o u t p u t by inserting freezing-out pockets on the intake side. This throttling c a n n o t be avoided in practice by making use of the K n u d s e n molecular pressure to compensate the pressure drop caused by the flow resistance. (Germany) H. Ebert and K. R. Albrand, Vacuum, 13 (12), Dec. 1963, 563568.
Vacuum Science and Technology 10
109. Survey of Vacuum Technology. (U.S.A.) W. G, Matheson, Electron Ind., 22 (10), Oct. 1963, 44-48. 11.
Production of Low Pressure ll :47
Vacuum tube outgassing unit.
See Abstr. No. 212. 14:47 Iulcakage and outgassing of transistors encapsulated by cold welding and by electric welding. See Abstr. No. 211.
11 110. Obtaining high and ultra high vacuum. (U.S.A.) L. D. Hall, Electron Ind., 22 (10), Oct. 1963, 102-106. 11:21
16.
111. High vacuum getter ion pump. (Great Britain) Anon., Engineer, 216 [5609), July 26, 1963, 162. 12.
16 : 33 Stabilization of semi-conductor characteristics by vacuum treatment. See Abstr. No. 173.
Measurement of Low Pressure 16 117. Hydrocarbon and adsorption studies at low pressures on the sodium and acid forms of synthetic mordenite. (U.S.A.) P. E. Eberly, jr., J. Physical Chem., 67, N o v e m b e r 1963, 24042411.
12 : 29 : 39 112. Development and use of Vacuum Devices. K. Herr, Die Technik, 18 (5) 1963, 360-363.
(Germany)
12:22 113. Influence of diffusion on the measurement of low pressure with the McLeod vacuum gauge. (Great Britain) In a fundamental paper on the diffusion of gases in mercury vapour, Gaede concludes, amongst other things, that pressure measurements carried out with the McLeod gauge are too low if a cold trap has been inserted between the gauge and the recipient. In the following, Gaede's line of thought, as far as it concerns the above phenomenon, is reproduced and some experimental results of very recent date confirming his theory are given.
16 : 33 118. A method to determine the surface concentration of antimony and arsenic diffusing from the vapour phase into germanium in high vacuum. Relation between concentration and diffusion coefficient.
(France) The method employed is an extension of the indicator strip method of Fuller and Dunlop. The thickness of the strips was of the order of 500~ the penetration being estimated by changes in resistivity as explained in the work of Vales and Glang. Theory indicated that the diffusion coefficient depends on the concentration, especially for steep impurity gradients. In the case of antimony, calculated and experimental value are in good agreement. Reasons for discrepancies in the case of arsenic are given.
(Germany) Ch. Meinke and G. Reich, Vacuum, 13 (12), Dec. 1963, 579--581. 12 : 22 114. Pressure measurements below 10 -z° torr with BayardAlpert and magnetron gauges. (U.S.A.) F. L. Torney and F. Feakes, Rev. Sci. Instrum., 34 (9), Sept. 1963, 1041-1043.
(Germany)
116.
w. J. s.
A. Niedermayer, Le Vide, 18 (10Ci), July/Aug. 1963, 374-385. 16 : 41 119. The diffusion of arsenic into germanium in vacua. (France) After describing a form of laboratory apparatus, the author discusses the necessary modification to turn it into a production model capable of dealing with batches of 5000-8000 transistor units per charge. (France) w.J.s. L. Peccoud, Le Vide, 18 (106), July/Aug. 1963, 386-389.
12:22 115. A device for the stabilization of pressures in the region of 1 ton'. (Great Britain). W. A. G a m b l i n g and T. H. Wilmshurst, J. Sci. Instrum., 40 (10), Oct. 1963, 473-476. 14.
G a s e s and S o l i d s
16 : 41 120. Application of the Snoek damping method to the determination of gas desorption from metals. (Great Britain) As an example for an investigation on the desorption of gases from metals into a high vacuum, wires made of highest purity iron, containing small amounts (up to 0.7 per cent. by weight) of
Kinetic Theory of Gases
14 The applicability of gas flows in the molecular range.
(Great Britain) Two possible app ~,ications of thermomolecular flow are discussed. 77
Classified A b s t r a c t s Abstracting Editor's Note. The label immediately following the title o f each item denotes country o f origin o f publication, and that at the end o f each abstract indicates country o f origin o f work (where known).
General Vacuum Science and Engineering 10.
One of these has already been briefly discussed by Gaede twentyfive years ago. In principle, it is possible to construct a thermopump. The second application concerns throttling the p u m p o u t p u t by inserting freezing-out pockets on the intake side. This throttling c a n n o t be avoided in practice by making use of the K n u d s e n molecular pressure to compensate the pressure drop caused by the flow resistance. (Germany) H. Ebert and K. R. Albrand, Vacuum, 13 (12), Dec. 1963, 563568.
Vacuum Science and Technology 10
109. Survey of Vacuum Technology. (U.S.A.) W. G, Matheson, Electron Ind., 22 (10), Oct. 1963, 44-48. 11.
Production of Low Pressure ll :47
Vacuum tube outgassing unit.
See Abstr. No. 212. 14:47 Iulcakage and outgassing of transistors encapsulated by cold welding and by electric welding. See Abstr. No. 211.
11 110. Obtaining high and ultra high vacuum. (U.S.A.) L. D. Hall, Electron Ind., 22 (10), Oct. 1963, 102-106. 11:21
16.
111. High vacuum getter ion pump. (Great Britain) Anon., Engineer, 216 [5609), July 26, 1963, 162. 12.
16 : 33 Stabilization of semi-conductor characteristics by vacuum treatment. See Abstr. No. 173.
Measurement of Low Pressure 16 117. Hydrocarbon and adsorption studies at low pressures on the sodium and acid forms of synthetic mordenite. (U.S.A.) P. E. Eberly, jr., J. Physical Chem., 67, N o v e m b e r 1963, 24042411.
12 : 29 : 39 112. Development and use of Vacuum Devices. K. Herr, Die Technik, 18 (5) 1963, 360-363.
(Germany)
12:22 113. Influence of diffusion on the measurement of low pressure with the McLeod vacuum gauge. (Great Britain) In a fundamental paper on the diffusion of gases in mercury vapour, Gaede concludes, amongst other things, that pressure measurements carried out with the McLeod gauge are too low if a cold trap has been inserted between the gauge and the recipient. In the following, Gaede's line of thought, as far as it concerns the above phenomenon, is reproduced and some experimental results of very recent date confirming his theory are given.
16 : 33 118. A method to determine the surface concentration of antimony and arsenic diffusing from the vapour phase into germanium in high vacuum. Relation between concentration and diffusion coefficient.
(France) The method employed is an extension of the indicator strip method of Fuller and Dunlop. The thickness of the strips was of the order of 500~ the penetration being estimated by changes in resistivity as explained in the work of Vales and Glang. Theory indicated that the diffusion coefficient depends on the concentration, especially for steep impurity gradients. In the case of antimony, calculated and experimental value are in good agreement. Reasons for discrepancies in the case of arsenic are given.
(Germany) Ch. Meinke and G. Reich, Vacuum, 13 (12), Dec. 1963, 579--581. 12 : 22 114. Pressure measurements below 10 -z° torr with BayardAlpert and magnetron gauges. (U.S.A.) F. L. Torney and F. Feakes, Rev. Sci. Instrum., 34 (9), Sept. 1963, 1041-1043.
(Germany)
116.
w. J. s.
A. Niedermayer, Le Vide, 18 (10Ci), July/Aug. 1963, 374-385. 16 : 41 119. The diffusion of arsenic into germanium in vacua. (France) After describing a form of laboratory apparatus, the author discusses the necessary modification to turn it into a production model capable of dealing with batches of 5000-8000 transistor units per charge. (France) w.J.s. L. Peccoud, Le Vide, 18 (106), July/Aug. 1963, 386-389.
12:22 115. A device for the stabilization of pressures in the region of 1 ton'. (Great Britain). W. A. G a m b l i n g and T. H. Wilmshurst, J. Sci. Instrum., 40 (10), Oct. 1963, 473-476. 14.
G a s e s and S o l i d s
16 : 41 120. Application of the Snoek damping method to the determination of gas desorption from metals. (Great Britain) As an example for an investigation on the desorption of gases from metals into a high vacuum, wires made of highest purity iron, containing small amounts (up to 0.7 per cent. by weight) of
Kinetic Theory of Gases
14 The applicability of gas flows in the molecular range.
(Great Britain) Two possible app ~,ications of thermomolecular flow are discussed. 77