Log entry time 12:47:40 on July 29, 2006

Entry number 175975

• harp 1ha103B was sticky. This is showned in that entry. One should note that the stickiness develloped with time (that is during the ~ 30mn the crew was attempting the scans). This behavior was already reported last Thrusday by Adams. When A. Freyberger (the expert) look at the problem Friday he did not found anything. Maybe the problem has to do with repeated use ? From the entry loged aboved you can also see that the harp 1ha103A is noisy, it doesn't prevent measurment but it is unfortunate that the harp that moves nicely is the noisy one ...
• Our Fast-Feedback is marginal. It can be turned on and every thing will look nomal for a while but eventually a "calibration failure" will occurs. This is why MCC wants so time to investigate the problem. This morning the beam looked pretty stable (the ffb seemed to be on) so we gave it a try. Well unfortunatly while trying to run the harps The beam position jumped on us... MCC said it might quite have been the ffb that failed (we asked them only later)