Articles you may be interested inPlasma nitriding process by direct current glow discharge at low temperature increasing the thermal diffusivity of AISI 304 stainless steel J. Appl. Phys. 113, 063507 (2013); 10.1063/1.4790631 High-density and low electron temperature direct current reflex plasma source Rev. Sci. Instrum. 75, 382 (2004); 10.1063/1.1637459 A formal presentation and comparative study of lowfrequency noise reduction techniques for direct current superconducting quantum interference devices Rev. Sci. Instrum. 67, 796 (1996); 10.1063/1.1146812Structure and properties of titanium nitride thin films deposited at low temperatures using direct current magnetron sputtering This paper presents an improved version of the low temperature direct current comparator described originally by Harvey. The comparator described herein exhibits a resolution of 1.5 nA' turn and provides ratios which have uncertainties of less than 4 parts in 1010. An alternate approach to the shielding of the windings is discussed and a preliminary comparator based on this concept is shown to have equally good performance. The. latter comparator is probably better suited to the attainment of large current ratios.
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