CW second harmonic results at 460 GHz of a gyrotron oscillator - for sensitivity enhanced NMR

We report 460 and 233 GHz CW results of a gyrotron operating at the second electron cyclotron harmonic and fundamental, respectively. A record CW power level of over 8 W has been obtained at 460 GHz in the TE/sub 0,6/ mode with 12.4 kV and 135 mA. The gyrotron has operated under computer control for...

Full description

Saved in:
Bibliographic Details
Main Authors: Hornstein, M.K., Bajaj, V.S., Kreischer, K.E., Griffin, R.G., Temkin, R.J.
Format: Conference Proceeding
Language:English
Subjects:
Electrons
Frequency
Gyrotrons
Laboratories
Magnetic field measurement
Magnetic fields
Nuclear and plasma sciences
Nuclear magnetic resonance
Oscillators
Superconducting magnets
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We report 460 and 233 GHz CW results of a gyrotron operating at the second electron cyclotron harmonic and fundamental, respectively. A record CW power level of over 8 W has been obtained at 460 GHz in the TE/sub 0,6/ mode with 12.4 kV and 135 mA. The gyrotron has operated under computer control for over an hour with stable power output of better than 1%. Fundamental CW studies at 233 GHz in the TE/sub 2,3/ mode reveal that oscillations start with less than 7 W of beam power below 3.5 kV. The gyrotron will extend sensitivity-enhanced NMR through dynamic nuclear polarization to the highest field ever used, 16.5 T (700 MHz /sup 1/H).
ISSN:2162-2027
DOI:10.1109/ICIMW.2005.1572600