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Hi,</div>
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After looking at the beam schedule again , I realized that I was mistake about the 4 weeks.</div>
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The LAD running should end on June 18<sup>th</sup> . The 20 weeks running would end on Aug 18th.</div>
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So it is actually 8 calendar weeks for R-sidis in this run period and then 33 calendar days </div>
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in FY26. Sorry for any confusion.</div>
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Cheers,</div>
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Mark </div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Rsidis-mgmt <rsidis-mgmt-bounces@jlab.org> on behalf of Rolf Ent <ent@jlab.org><br>
<b>Sent:</b> Thursday, March 27, 2025 10:04 AM<br>
<b>To:</b> Dave Gaskell <gaskelld@jlab.org>; rsidis-mgmt@jlab.org <rsidis-mgmt@jlab.org><br>
<b>Subject:</b> Re: [Rsidis-mgmt] FY25 running</font>
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Hi Dave, all,</div>
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So split as four weeks this year and the rest next year. Four weeks is about 14 PAC days but let's be somewhat conservative and say 10 PAC days.</div>
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My pragmatic preference would still be to treat the two run periods as separate experiments, so is there any scan (including R_SIDIS and nuc_R_SIDIS) we can likely complete in 10 PAC days? If so, we may strongly argues for completion this FY25, i.e., have three
energies. Yes, I know this may add overhead, but I do think it is an approach we should consider (if possible at all). My view, but others may have much better ideas,</div>
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best regards, Rolf</div>
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<div dir="ltr" id="x_divRplyFwdMsg"><span style="font-family:Calibri,sans-serif; font-size:11pt; color:rgb(0,0,0)"><b>From:</b> Dave Gaskell <gaskelld@jlab.org><br>
<b>Sent:</b> Thursday, March 27, 2025 9:56 AM<br>
<b>To:</b> Rolf Ent <ent@jlab.org>; rsidis-mgmt@jlab.org <rsidis-mgmt@jlab.org><br>
<b>Subject:</b> Re: FY25 running</span>
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<div>Hi Rolf, all -<br>
<br>
Mark just came by office and we discussed the impact of the reduced running.<br>
<br>
For now, Mark's plan to finish LAD as scheduled, use what time is left in FY25 to run as much of R-SIDIS as we can, and then continue R-SIDIS in the next run period. Looking at the calendar, it appears we would get about 4 weeks this year and the rest next
year.<br>
<br>
So it looks like our mission is to figure out the optimized plan for breaking the running into 2 run periods. During the time period we're looking at next year, Hall A is off and Hall B is at 1 or 2 pass (and Hall D at 5 pass as usual), so that looks totally
compatible with R-SIDIS running at 3,4, and 5 pass. The gradient is scheduled to be slightly different (2.2 GeV per pass), so we would need to tweak kinematics a little I guess.<br>
<br>
Regards,<br>
Dave<br>
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<div>On 3/27/25 9:13 AM, Rolf Ent wrote:</div>
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Hi all,</div>
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not unexpected that we get all kind of turmoil from the year-long continuing resolution situation coupled with uncertainty for FY26. Do the five weeks solely come from R_SIDIS, i.e., what does it mean for how many calendar days or PAC-equivalent days we can
assume? And the issue may also be the alignment of energies, presumably for most of our time Hall A is at the highest energy and we have some choice.</div>
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Overall, we should just get some complete scans for R_SIDIS, as whatever we get is new and the world is in eager anticipation. Plus the recent theory calculations start hinting that R_SIDIS may be higher than the naive R_DIS assumption, so we will gather interesting
results either way. So that is my view, we should be pragmatic and make sure we prioritize to always get some R scans out. Same with R_SIDIS in nuclei. Something is better than nothing.</div>
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I am sure we can stare at the various kinematics tables to figure something out. But we do need to know the rough idea of days and flexibility in energies?</div>
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Best regards, Rolf</div>
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<div id="x_x_divRplyFwdMsg" dir="ltr"><span style="font-family:Calibri,sans-serif; font-size:11pt; color:rgb(0,0,0)"><b>From:</b> Rsidis-mgmt
<a href="mailto:rsidis-mgmt-bounces@jlab.org" id="OWA8d910d39-bf26-f348-541c-5dbcc3c2018c" class="x_x_moz-txt-link-rfc2396E x_OWAAutoLink">
<rsidis-mgmt-bounces@jlab.org></a> on behalf of Dave Gaskell <a href="mailto:gaskelld@jlab.org" id="OWA94cefad1-41b5-d887-f6a3-a7132dc849f4" class="x_x_moz-txt-link-rfc2396E x_OWAAutoLink">
<gaskelld@jlab.org></a><br>
<b>Sent:</b> Thursday, March 27, 2025 8:55 AM<br>
<b>To:</b> <a href="mailto:rsidis-mgmt@jlab.org" id="OWA4ea959b2-9740-c290-97da-bb935340a1d7" class="x_x_moz-txt-link-abbreviated x_OWAAutoLink">rsidis-mgmt@jlab.org</a>
<a href="mailto:rsidis-mgmt@jlab.org" id="OWA34f67584-8b7a-f3e8-41a9-7c7789607b18" class="x_x_moz-txt-link-rfc2396E x_OWAAutoLink">
<rsidis-mgmt@jlab.org></a><br>
<b>Subject:</b> [Rsidis-mgmt] FY25 running</span>
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<div style="font-size:11pt">Hi all -<br>
<br>
Douglas Higinbotham announced at the 7:45 meeting this morning that<br>
budget guidance to the lab has arrived, and that the lab will need to<br>
reduce the running for FY25 from 25 to 20 weeks. No word on how this<br>
will be divided amongst experiments, but we should look into options for<br>
reducing needed beam time for R-SIDIS.<br>
<br>
Regards,<br>
Dave<br>
<br>
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<a href="https://mailman.jlab.org/mailman/listinfo/rsidis-mgmt" id="OWAfd14cced-f0db-0977-2cea-f4c388bd575b" class="x_x_OWAAutoLink x_x_moz-txt-link-freetext" data-auth="NotApplicable">https://mailman.jlab.org/mailman/listinfo/rsidis-mgmt</a></div>
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