Continuously Tunable 250 GHz Gyrotron with a Double Disk Window for DNP-NMR Spectroscopy
From The DNP-NMR Blog:
Continuously Tunable 250 GHz Gyrotron with a Double Disk Window for DNP-NMR Spectroscopy Jawla, S., et al., Continuously Tunable 250 GHz Gyrotron with a Double Disk Window for DNP-NMR Spectroscopy. J Infrared Milli Terahz Waves, 2013. 34(1): p. 42-52. http://dx.doi.org/10.1007/s10762-012-9947-1 In this paper, we describe the design and experimental results from the rebuild of a 250 GHz gyrotron used for Dynamic Nuclear Polarization enhanced Nuclear Magnetic Resonance spectroscopy on a 380 MHz spectrometer. Tuning bandwidth of approximately 2 GHz is easily achieved at a fixed magnetic field of 9.24 T and a beam current of 95 mA producing an average output power of >10 W over the entire tuning band. This tube incorporates a double disk output sapphire window in order to maximize the transmission at 250.58 GHz. DNP Signal enhancement of >125 is achieved on a 13C-Urea sample using this gyrotron. Go to The DNP-NMR Blog for more info. |
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