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458. Electroluminescence. (Its characteristics and applications)
Classified Abstracts 458--459
236
biasing voltage to a probe system so that electron temperatures up to 2 × 105°K and ion densities up to 5 × 10 TM cm -3 can be measured. The system consists of a low impedance voltage sweep generator, a transformer-coupled measuring circuit, and a logarithmic amplifier. The apparatus can be used to sample a portion or the whole of the electron density distribution by using double probes of equal or greatly unequal areas. The probe plots are displayed directly on an oscilloscope. (Authors) H. W. Jones and P. A. H. Saunders, J. Sci. Instrum., 37 (12). Dec. 1960, 457-459.
19.
Radiation 19 : 33
458. Electroluminescence.
(Its characteristics and applications.)
General review article. D. H. Smith, Electronic Engng, 33 (396), Feb. 1961, 68-72 and 33 (397), March 1961, 164-170.
19 : 33
459. Photomultiplier soft X-ray spectrometer. Great Britain. A soft X-ray spectrometer designed specifically to use a beryllium-copper photomultiplier as detector is described. The detector swings on a radial arm so as to move on the Rowland Circle (radius 50 cm), inside a sector-shaped vacuum tank. This tank has a base-plate of 2-in. mild steel and walls of 1-in. mild steel, and is connected by a liquid air trap and a flap-seal valve to a 4-in. oil diffusion pump. The 1-in. thick aluminium-alloy lid of the chamber is sealed by a rubber gasket fitted in a groove running round the upper edge of the wall. The X-rays enter at a slit in the side wall, which can be sealed when required by means of a valve consisting of a brass block faced with rubber. The method of use of the instrument is described, and the emission band spectra of aluminium, magnesium, sodium, and lithium are given as examples of results obtained with it. M.U.A. L. Jacob, R. Noble and H. Yee, J. Sci. Instrum., 37 (12), Dec. 1960, 460-463.
236
biasing voltage to a probe system so that electron temperatures up to 2 × 105°K and ion densities up to 5 × 10 TM cm -3 can be measured. The system consists of a low impedance voltage sweep generator, a transformer-coupled measuring circuit, and a logarithmic amplifier. The apparatus can be used to sample a portion or the whole of the electron density distribution by using double probes of equal or greatly unequal areas. The probe plots are displayed directly on an oscilloscope. (Authors) H. W. Jones and P. A. H. Saunders, J. Sci. Instrum., 37 (12). Dec. 1960, 457-459.
19.
Radiation 19 : 33
458. Electroluminescence.
(Its characteristics and applications.)
General review article. D. H. Smith, Electronic Engng, 33 (396), Feb. 1961, 68-72 and 33 (397), March 1961, 164-170.
19 : 33
459. Photomultiplier soft X-ray spectrometer. Great Britain. A soft X-ray spectrometer designed specifically to use a beryllium-copper photomultiplier as detector is described. The detector swings on a radial arm so as to move on the Rowland Circle (radius 50 cm), inside a sector-shaped vacuum tank. This tank has a base-plate of 2-in. mild steel and walls of 1-in. mild steel, and is connected by a liquid air trap and a flap-seal valve to a 4-in. oil diffusion pump. The 1-in. thick aluminium-alloy lid of the chamber is sealed by a rubber gasket fitted in a groove running round the upper edge of the wall. The X-rays enter at a slit in the side wall, which can be sealed when required by means of a valve consisting of a brass block faced with rubber. The method of use of the instrument is described, and the emission band spectra of aluminium, magnesium, sodium, and lithium are given as examples of results obtained with it. M.U.A. L. Jacob, R. Noble and H. Yee, J. Sci. Instrum., 37 (12), Dec. 1960, 460-463.