Author/Authors :
Kondo، نويسنده , , K. and Ball، نويسنده , , J. and Baum، نويسنده , , G. and Berglund، نويسنده , , P. and Doshita، نويسنده , , N. and Gautheron، نويسنده , , F. and Goertz، نويسنده , , St. and Hasegawa، نويسنده , , Van T. and Horikawa، نويسنده , , N. and Ishimoto، نويسنده , , S. and Iwata، نويسنده , , T. and Kisselev، نويسنده , , Y. and Koivuniemi، نويسنده , , J. and M. LeGoff، نويسنده , , J. and Magnon، نويسنده , , William A. and Matsuda، نويسنده , , T. an، نويسنده ,
Abstract :
Continuous wave nuclear magnetic resonance (NMR) is used to determine the target polarization in the COMPASS experiment. The system is made of the so-called Liverpool Q-meters, Yale-cards, and VME modules for data taking and system controlling. In 2001 the NMR coils were embedded in the target material, while in 2002 and 2003 the coils were mounted on the outer surface of the target cells to increase the packing factor of the material. Though the error of the measurement became larger with the outer coils than with the inner coils, we have performed stable measurements throughout the COMPASS run time for 3 years. The maximum polarization was +57% and −53% as the average in the target cells.
Keywords :
NMR , Polarized target , COMPASS , NA58 , Polarization measurement
