Beam1 Gas events with stable beam shortly after midnight of 22 November. First tracks seen in Outer tracker, seed tracks (magenta color coding), first Long tracks seen = tracks from Velo to Outer tracker (Blue color coding). The tracks are Kalman fitted, residuals indicated in the picture with green (good), orange (ok), red(bad) chi2 quality. Only data from t=0 event used.

Some closer lookups


IT, only ITT3CSide on, hits show clear tracks. The blue line is a long track made with OT and Velo hits. 3d projection shows that track does not match with IT hits, as it looks like in this projection.