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• W2082546906 abstract "Cold cathode ionisation gauges in which the discharge is maintained in an axial magnetic field provide a convenient and rapid means of measuring pressure in the range 10−2 to 10−7mm. Hg. These instruments are simple to make and operate and it is virtually impossible to damage them. With such a gauge, measurement of pressure is effected by a robust pivot-meter which measures a current of ions formed by electron bombardment. Primary electrons are released by cold emission from a pair of cathodes and many secondary electrons are generated by the ions themselves. The magnetic field causes the electrons to move in tight spirals to and fro between the two cathode plates. In this way the number of ions per electron, between initial emission and eventual escape from the discharge to the anode, is much increased. A review is given of the construction, characteristics and performance of various types of cold cathode gauge. The influence is reported of size and shape of the electrodes, of applied voltage, of magnetic field and of the nature of the gas. Reference is made to the performance at relatively high pressures (10−2 to 10−3mm. Hg.). Attention is drawn to the generation of radio frequencies by cold cathode gauges. Le manometre a ionisation a cathode froide, dans lequel la décharge est maintenue dans un champ magnétique axial, est un moyen pratique et rapide de mesurer des pressions entre 10−2 et 10−7mm. Hg. Ces instruments sont simples à construire et on peut presque jamais les endommager. Avec une telle jauge la lecture se fait sur un instrument à pivot, robuste, qui mesure le courant ionique formé par bombardement électronique. Des électrons primaires sont libérés par émission froide au depart d'une paire de cathodes, et de nombreux électrons secondaires sont générés par les ions eux-mêmes. Le champ magnétique oblige les electrons à se mouvoir en une spirale serrée de et vers les plaques cathodiques. De cette façon le nombre d'ions par électron, entre l'émission initiale et l'échappement final vers l'anode, est fortement augmenté. L'on passe en revue la construction, les characteristiques et performances de differents types de jauges à cathode froide. Les auteurs rendent compte de l'influence de la forme et des dimensions de életrodes, de la tension appliquée du champ magnétique et de la nature du gaz. Ils se réfèrent à la performance sous pressions relativement élevées (10−2 à 10−3mm. Hg.). Ils attirent l'attention sur la génération de frequences radio par des jauges à cathode froide." @default.
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• W2082546906 date "1953-01-01" @default.
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• W2082546906 title "Cold cathode ionisation gauges for the measurement of low pressures" @default.
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• W2082546906 doi "https://doi.org/10.1016/0042-207x(53)93785-3" @default.
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