Author/Authors :
Court، نويسنده , , G.R. and Houlden، نويسنده , , M.A. and Bültmann، نويسنده , , S. and Crabb، نويسنده , , D.G. and Day، نويسنده , , D.B. and Prok، نويسنده , , Y.A. and Penttila، نويسنده , , S.I. and Keith، نويسنده , , C.D.، نويسنده ,
Abstract :
The factors are reviewed that can affect the systematic uncertainties in CW-NMR measurements of the polarization in solid state polarized targets. The main problem with large signals, typically obtained with protons, is non-linearity arising from failure of the constant RF drive current assumption. The non-linearity can be reduced by operation at lower than normal signal levels. With the much smaller size deuteron signals, a limiting factor may be the instability of the background signal generated by the resonant length cable, used in the standard system. A new system is demonstrated, using non-resonant length cables, which is expected to reduce these uncertainties to a low level.
