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The Electronics and Instrument Development Laboratory The laboratory has been a part of the EPR Center since its formation. It provides the capability for maintaining the existing equipment and for design and construction of new instruments. In order to fulfill its mission, it is has been equipped with small machining tools (including a lathe and a milling machine) and a wide range of electronic instrumentation. These tools are used for developing specialized spectrometer subsystems and for design, development and testing of resonators. Electronic test equipment available at the Center includes: Agilent 8753 ET Network Analyzer 300 kHz - 3 GHz HP-8560E Spectrum Analyzer Tektronix TDS 680B Digital Real-Time Oscilloscope HP-8657B Synthesized Signal Generator IFR 2041 10 kHz - 2.7 GHz Low Noise Signal Generator 2 Agilent 33220A 20 MHz Function/Arbitrary Waveform Generators Tektronix TDS2024 Four-Channel 200 MHz 2 Gspl/s Digital Storage Oscilloscope BK Precision 2650 3.3 GHz Spectrum Analyzer GMW DMT 151 Digital Teslameter with MPT 231 High Sensitivity Hall probe These are standard and necessary tools for a laboratory to ensure the functioning of the EPR Center. A particularly useful piece of equipment is the very low noise (-140 dBc at 10 kHz) IFR 2041 signal generator. It plays a very important role in prototyping spectrometers functioning at frequencies different from the that were used at the Center to date. The BK precision spectrum analyzer is portable, which showed its usefulness due to the recent extension of the Center to two sites (in addition to the Laboratory at the Dartmouth Medical School we now operate spectrometers at the Rubin Building at the Dartmouth-Hitchcock Medical Center). The digital teslameter is necessary for developing gradient coil systems that are important for new directions of research embarked on at the Center. Capabilities of the four-channel Tektronix oscilloscope have been useful in rapid development of new spectrometers through direct digitization of the output signals and the software control provided by the manufacturer. This laboratory is also the site of the developing multi-quantum (MQ) spectrometer that operates at 600 - 900 MHz and four additional L-Band spectrometers for instrumental development and specialized use. These include a spectrometer for the development of a transportable in vivo dosimeter based on a “flat magnet”, an experimental spectrometer for developmental projects, and the prototype of the new generation of L-Band spectrometers, using a transportable 12” diameter cylindrical magnet from Resonance Research. EPR Center for the Study of Viable Systems
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