TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 CONT

Travelling Heater Growth... The aim of this experiment is to improve the crystal quality by investigating the following objectives under reduced gravity as well as under earth conditions : dopant and composition inhomogeneities(striations) on the macro and micro scale(axial and radial distribution), crystal perfection with respect to low defect density, the distribution of defects and the residual impurity concentration, studies of the influence of different transport phenomena in the solution/melt zone on the crystal growth mechanisms...  2, record 1, English, - travelling%20heater%20growth

Record 1,  Textual support,  French

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

The level of impurity materials as compared to semiconductor substrate materials within the structure. The net concentration establishes the characteristics conduction pattern and other characteristics of the material.  1, record 2, English, - impurity%20concentration

Record 2,  Textual support,  French

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 CONT

In 1956, Harley and Pretorius described a simple discharge detector for gas chromatography based on the electrical properties of a glow discharge, the voltage across the gaseous discharge being a function of the type of gas present. Druyvesteyn and Penning in 1940 reviewed the complex nature of the glow discharge, noting that the discharge is maintained by electrons emitted from the cathode which result from processes related to positive ion bombardment, photoelectric emission, and collisions with excited atoms. When trace quantities of a material eluted from a chromatographic column enter the detector (consisting of a small platinum disk cathode and a tungsten wire anode), a voltage change resulted which was recorded.  2, record 3, English, - glow%20discharge%20detector

Record number: 3, Textual support number: 1 OBS

Using neon lamps Pitkethly found... that these detector were current and pressure independent at 1-1. 5 mS and 3-5 mm Hg.... In 1958, Roberts and Hinkle evaluated glow discharge tubes as detectors for compounds in the concentration range of 5-500 ppm and concluded that the detector was not applicable to general-purpose use.... More recently, Wilhite described glow discharge-type devices which act electrically similar to a gas-filled voltage-regulator tube... Riley described the use of an argon purity meter, a glow-type discharge detector, for the determination of small concentrations(0-1500 ppm) of impurity gases in argon.  2, record 3, English, - glow%20discharge%20detector

Record 3,  Textual support,  French

Record 3,  Textual support,  Spanish