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1) radiation load on east side of machine<br>
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We discussed ways to address this. One consideration is whether or not we have longitudinal tails on the beam.
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A couple of days ago, it was found to be the case on C and A beam. the 1A sync light monitor was used in tune mode and we adjusted</div>
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gang phase of NL. This monitor is now dead. <br>
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The plan would be to fix it (replace camera and maybe shield it better) friday during</div>
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the time that we are reverting the spin to the longitudinal configuration for Hall A.</div>
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After it is fixed, we can characterize the beam longitudinal profile at the exit of injector. That should allow us to determine the amount of
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phase offset one should put in 0L04 to get the bunch upright. We have the tools to do these measurements.
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We can correlate the bunch orientation with the amount of activity in the BLMS on the east side.</div>
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So the sequence would be :</div>
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have Joe Grames take 30 minutes to check the system for being able to do the test on ion trapping</div>
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then do the spin adjustment for the hall a running conditions</div>
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in //, take an access to fix the 1A sync light</div>
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when beam is back, do the bunch characterization on 1A</div>
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send beam to Hall A at 150 on their carbon target, check BLM activity</div>
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adjust 0L04 to make the bunch upright (using the data from the measurement) <br>
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correlate with the BLM activity.<br>
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Please everybody who is involved, send me an ATLIS # . All of these should have an ATLIS.</div>
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2) orbit lock and ffb behavior after restoring from a trip.</div>
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Options after coming back from a trip:</div>
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1) ramp up immediatly, trust the position monitoring software and ion chambers to trip if we had a big offset</div>
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2) ramp up to 5 muamps instead of two to see if injector orbit lock behaves better</div>
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3) only enable injector orbit lock after we are ramped up</div>
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4) develop software to look at orbit changes and compare the before to after the trip. if its within a window (to be determined) , reenable ramping to CW.</div>
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The first three options could be done easily. The last one requires a bit of software development.</div>
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I am not sure we came to consensus on what to do on this option.<br>
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Yves<br>
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