Log entry time 11:12:51 on August 03, 2006

Entry number 177120

First panel-> y_tgt vs. delta Second panel-> x vs. y of FPP front chamber tracks projected to the carbon analyzer

The three plots are for the three elastic hydrogen kinematic settings taken earlier (Kin1, Kin2, Kin3). One can clearly see the effect that Mark alludes to in his recent log entry.

Notice also that for the -2% delta setting (which actually appears at -4%), the x-y distribution at the FPP is very close to the bottom of the chambers. It might be that the large instrumental asymmetries that were seen earlier are related to this .... I think that it was mostly from this momentum setting that we saw the large instrumental asymmetries

Figure 1

Figure 2

Figure 3