Author/Authors :
Baumgarten، نويسنده , , C and Braun، نويسنده , , B and Contalbrigo، نويسنده , , M and Court، نويسنده , , G and Ciullo، نويسنده , , G and Dalpiaz، نويسنده , , P and Graw، نويسنده , , G and Haeberli، نويسنده , , W and Henoch، نويسنده , , M and Hertenberger، نويسنده , , R and Koch، نويسنده , , N and Kolster، نويسنده , , H and Lenisa، نويسنده , , P and Marukyan، نويسنده , , H and Nass، نويسنده , , A and Reggiani، نويسنده , , D and Rith، نويسنده , , K and Sima، نويسنده ,
Abstract :
A gas analyzer has been developed for the internal polarized target of the HERMES experiment at DESY in order to determine the relative amount of atomic and molecular hydrogen or deuterium in a gas sample. The precise quantitative knowledge of this ratio is crucial because the nucleons in atoms and molecules contribute differently to the average nuclear polarization of the target gas. A new calibration technique used to derive the relative sensitivity to atoms and molecules is presented. As an example, it is shown how the gas analyzer is used within the HERMES environment to divide the molecules in the gas sample into an unpolarized and a potentially polarized fraction.
