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- W2330628171 abstract "Sensors that measure magnetic resonance relaxation times are increasingly finding applications in areas such as food and drink authenticity and waste water treatment process control. Modern permanent magnets are used to provide the static magnetic field in many commercial instruments and advances in electronics, such as field programmable gate arrays, have provided lower cost console electronics for generating the series of RF pulses and detecting the resultant magnetic resonance signals. One area that still remains prohibitively expensive for many sensor applications of pulsed magnetic resonance is the requirement for a high frequency power amplifier. With many permanent magnet sensors providing a magnetic field in the 0.25T to 0.5T range, a power amplifier that operates in the 10MHz to 20MHz rage is required. This frequency range falls at the low end of the amateur “ham” radio frequency spectra designated for private recreation and non-commercial exchange of messages. In this work we demonstrate that low cost commercial amateur radio amplifiers can be simply modified, to operate as pulsed magnetic resonance power amplifiers. We demonstrate two amplifier systems, one medium power that can be constructed for less than Euro 100 and a second higher power system which produces comparable results to commercial pulse amplifiers that are an order of magnitude more expensive. Data is presented using both the commercial NMR MOUSE and a permanent magnet system used for monitoring the clog state of constructed wetlands.  " @default.
- W2330628171 created "2016-06-24" @default.
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- W2330628171 date "2015-11-10" @default.
- W2330628171 modified "2023-09-27" @default.
- W2330628171 title "Cost effective power amplifiers for pulsed NMR sensors" @default.
- W2330628171 doi "https://doi.org/10.3390/ecsa-2-c005" @default.
- W2330628171 hasPublicationYear "2015" @default.
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