[Halld] [New Logentry] Discussion of special running

[marki at jlab.org]

Logentry Text:
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At the run coordination meeting on Friday, we discussed two proposals for special runs once the beam comes back.

<h3>Zero-Field Running</h3>

<p>Lubomir presented a <a href="https://logbooks.jlab.org/entry/3392044">proposal</a> for running at zero field, taking advantage of having the solenoid ramped down. There are several goals, and two sets of running conditions, one for four hours, one for two.

<p>We agreed to go ahead with his plan. This will be done after initial beam quality checks.

<h3>Tagger Quadrupole Test</h3>

<p>Richard presented a <a href="https://halldweb.jlab.org/wiki/images/d/de/Quadrupolestudy-3-25-2016.pdf">proposal</a> for testing the effectiveness of the quadrupole upstream of the tagger magnet for focusing the electron beam on to the middle row of the microscope counters. For the proposed study the quadrupole will be set at the target current and a single row of the microscope will be turned on with the process repeated for each of the five rows. The estimate is that one hour of running per row should suffice.

<p>We agreed to defer this running until after we re-establish and sustain normal production running (para/perp/amorphous runs) for a few days at least. This will allow us to confront any problems that may have crept in during the down-time as well as discuss details of the plan.


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This is a plain text email for clients that cannot display HTML.  The full logentry can be found online at https://logbooks.jlab.org/entry/3392451
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