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User name M Friend
Log entry time 23:30:33 on September17,2009
Entry number 290218
keyword=Compton Beam PositionThe Compton beam position was determinedby a vertical and horizontal scan. The first picture shows that the horizontal beam position hasn't changed from GSO table position 73.5, where we found the beam during the last scan. The second picture shows that the vertical beam position also hasn't changed very much and is now at GSO table position 38.0 (where before we found a position of 38.5). The veritical beam position is still a problem, since we currently have the collimator centered at GSO table position 43.75. We probably need to change the y position of the Compton beam, since we are still off by 5.75mm.
FIGURE 1
FIGURE 2
