A 1 microampere ion beam accelerated at 200 kV to a titanium-tritium target can generate up to 10 8 neutrons per second.
2.
As a result, a key feature in next generation RFQ beam coolers will be their ability to handle beam currents in the microampere range.
3.
In a potentiometer bridge circuit, this could be reduced to a fraction of a microampere . Vacuum tube voltmeters from the 1940's on had this high or higher input impedances.
4.
In analog microampere-meter-based horn analyzers, the user identifies the frequencies manually, using the meter to detect the points of minimum and maximum current while sweeping the driving frequency.
5.
To guard against this slim theoretical possibility then, modern medical devices include a range of protective measures to limit current in cardiac-connected circuits to the assumed safe levels of below 10 ?A ( microampere ).
6.
Based on studies with dogs by Prof Leslie Geddes in the middle of last century, it is theorised that a current as low as 10 ?A ( microampere ) directly through the heart, may send a human patient directly into ventricular fibrillation.
7.
A quality general-purpose electronics DMM is generally considered adequate for measurements at signal levels greater than one millivolt or one microampere, or below about 100 megohms; these values are far from the theoretical limits of sensitivity, and are of considerable interest in some circuit design situations.
8.
These devices used an S1 photocathode or " silver-oxygen-caesium " photocathode, discovered in 1930, which had a sensitivity of around 60 �A / lm ( Microampere per Lumen ) and a quantum efficiency of around 1 % in the ultraviolet region and around 0.5 % in the infrared region.
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