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Upgraded iFlex Faraday counting system

Mon, 05/09/2016

                     

 A new upgrade to our Faraday electrometer (white box above), which has 1010, 1011, and 1012 ohm resistors and can be operated in resistive or charge modes, significantly increases the dynamic range of the detectors on SHRIMP-RG. iFlex allows the Faraday cup-electron multiplier combination to be used on much lower signals than a conventional high gain electrometer, thereby overcoming the ‘megaHertz gap’ between signals too high for an electron multiplier (> 100 kHz) and too low for a conventional electrometer (< 1 MHz). Although SHRIMP-RG is still a single collector instrument, small signals can still be measured on the electron multiplier, whereas larger signals can be measured on the Faraday cup. New software upgrades allows the acquisition table to switch dynamically between detectors.