[Rgc] RGC weekly meetings back on Tuesdays (this time focused on FTon extension)

[Sebastian Kuhn]

Hi Silvia,

You probably meant to say “two LESS months” as you are the one proposing a change from the agreed-upon run plan.

Just to be entirely clear: Originally, the FTout (“ELMO”) configuration with full luminosity and raster was scheduled to run for 180 calendar days. Right now, we have anyway only 170 days left since we postponed the changeover by 2 weeks already. “2 less months” relative to what the original, agreed-upon run plan (and official schedule) showed would correspond to 120 days for FTOut, which means 50 additional days lost. In that case, the absolute latest to switch over to FTOut would be the 2nd week of October if we want to preserve at least those 120 days. IF you also insist on spending a week NOW on fixing the deuteron NMR (without synergy with the configuration change), this would give FTOn at most 5-6 more weeks. Switching over at the end of October (even if we begin the switch October 24) would reduce the FTOut part to 3 1/2 months or roughly 100 out of originally 180 days. If you ask everyone to prepare a case for why we should NOT overturn an agreed-upon run plan in the middle of the run, at least be clear what you are requesting.

- Sebastian

On Aug 21, 2022, at 5:45 AM, silvia at jlab.org<mailto:silvia at jlab.org> wrote:

it would be great if the DIS and SIDIS representatives can
provide motivations of how two more months of FTon will affect their
results and physics conclusions.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/rgc/attachments/20220821/0f6eda96/attachment.html>