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Thanks for a nice recap and refinement on getting to the ‘absolute energy flexibility’
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<div>Cheers,<br>
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<p class="MsoNormal" style="margin: 0cm 0cm 0.0001pt;"><span style="background-color: rgba(255, 255, 255, 0);">Alex<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin: 0cm 0cm 0.0001pt;"><span style="background-color: rgba(255, 255, 255, 0);">___________________________________<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin: 0cm 0cm 0.0001pt;"><span style="background-color: rgba(255, 255, 255, 0);">S. Alex Bogacz,<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin: 0cm 0cm 0.0001pt;"><span style="background-color: rgba(255, 255, 255, 0);">Accelerator Physics Group Leader<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin: 0cm 0cm 0.0001pt;"><span style="background-color: rgba(255, 255, 255, 0);">Center for Advanced Studies of Accelerators<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin: 0cm 0cm 0.0001pt;"><span style="background-color: rgba(255, 255, 255, 0);">Jefferson Lab<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin: 0cm 0cm 0.0001pt;"><font color="#000000"><span style="caret-color: rgb(0, 0, 0); background-color: rgba(255, 255, 255, 0);"><a href="x-apple-data-detectors://8" dir="ltr" x-apple-data-detectors="true" x-apple-data-detectors-type="address" x-apple-data-detectors-result="8" style="text-decoration-color: rgba(127, 127, 127, 0.380392);">12000
Jefferson Avenue,</a><o:p></o:p></span></font></p>
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<p class="MsoNormal" style="margin: 0cm 0cm 0.0001pt;"><font color="#000000"><span style="caret-color: rgb(0, 0, 0); background-color: rgba(255, 255, 255, 0);"><a href="x-apple-data-detectors://8" dir="ltr" x-apple-data-detectors="true" x-apple-data-detectors-type="address" x-apple-data-detectors-result="8" style="text-decoration-color: rgba(127, 127, 127, 0.380392);">Newport
News, VA 23606</a><o:p></o:p></span></font></p>
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<span style="background-color: rgba(255, 255, 255, 0);">___________________________________</span>
<div>Sent from my iPhone</div>
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<blockquote type="cite">On Mar 15, 2024, at 1:44 PM, Brooks, Stephen via FFA_CEBAF_Collab <ffa_cebaf_collab@jlab.org> wrote:<br>
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<blockquote type="cite">
<div dir="ltr"><span>The design accepts 9-21GeV, so if the beam enters at 9GeV after 5 full turns, then after another 5 full turns it would be at 18GeV minus any synchrotron radiation loss, so 17.5GeV or something like that. You wouldn't run into the FFA
upper limit when operating the linacs at only 900MeV, you'd just get less energy overall.</span><br>
<span></span><br>
<span>To get 22GeV after 10 full turns you'd need about 1150MeV per linac. The range between these two settings covers the full "energy adjustability" range ~2.2GeV between the final two turns, meaning you can get a continuous range of energies by combining
selecting which turn to extract with varying the linac energy.</span><br>
<span></span><br>
<span> -Stephen</span><br>
<span></span><br>
<span>________________________________________</span><br>
<span>From: FFA_CEBAF_Collab <ffa_cebaf_collab-bounces@jlab.org> on behalf of Roger Ruber via FFA_CEBAF_Collab <ffa_cebaf_collab@jlab.org></span><br>
<span>Sent: 15 March 2024 13:28</span><br>
<span>To: ffa_cebaf_collab@jlab.org</span><br>
<span>Subject: Re: [FFA_CEBAF_Collab] FFA@CEBAF WG mtg. this Friday, March 15</span><br>
<span></span><br>
<span>Hi,</span><br>
<span></span><br>
<span>Apologies I couldn't join today and missed this interesting discussion.</span><br>
<span></span><br>
<span>I see from the conclusions that the sextupole magnets would help to</span><br>
<span>lower the energy acceptance to 9 GeV. That would be 0.9 GeV/linac</span><br>
<span>and give and overhead of >200 MeV or 2 C100 cryomodules/linac.</span><br>
<span>That would be really a good solution.</span><br>
<span></span><br>
<span>How does it affect the upper energy acceptance?</span><br>
<span></span><br>
<span>Best regards,</span><br>
<span>Roger.</span><br>
<span></span><br>
<span>-----Original Message-----</span><br>
<span>From: FFA_CEBAF_Collab <ffa_cebaf_collab-bounces@jlab.org> On Behalf Of Ryan Bodenstein via FFA_CEBAF_Collab</span><br>
<span>Sent: Friday, 15 March, 2024 12:03</span><br>
<span>To: Alex Bogacz via FFA_CEBAF_Collab <ffa_cebaf_collab@jlab.org></span><br>
<span>Cc: Tim Michalski <michalsk@jlab.org>; Nick Sereno <nsereno@jlab.org>; Salim Ogur <salim.ogur@cern.ch>; Planche Thomas <tplanche@triumf.ca></span><br>
<span>Subject: Re: [FFA_CEBAF_Collab] FFA@CEBAF WG mtg. this Friday, March 15</span><br>
<span></span><br>
<span>Dear Colleagues,</span><br>
<span></span><br>
<span>Thanks for the updates this week. Attached (and uploaded), you'll find our minutes.</span><br>
<span></span><br>
<span>Everyone have a great weekend!</span><br>
<span></span><br>
<span>Cheers!</span><br>
<span>Ryan</span><br>
<span></span><br>
<span></span><br>
<span>Dr. Ryan Bodenstein (he/him)</span><br>
<span></span><br>
<span>Staff Scientist II – Center for Advanced Study of Accelerators (CASA)</span><br>
<span></span><br>
<span></span><br>
<span></span><br>
<span>12000 Jefferson Avenue</span><br>
<span></span><br>
<span>Newport News, VA 23606</span><br>
<span></span><br>
<span>United States of America</span><br>
<span></span><br>
<span>________________________________</span><br>
<span></span><br>
<span>From: FFA_CEBAF_Collab <ffa_cebaf_collab-bounces@jlab.org> on behalf of Alex Bogacz via FFA_CEBAF_Collab <ffa_cebaf_collab@jlab.org></span><br>
<span>Sent: Monday, March 11, 2024 11:01 PM</span><br>
<span>To: Alex Bogacz via FFA_CEBAF_Collab <ffa_cebaf_collab@jlab.org></span><br>
<span>Cc: Tim Michalski <michalsk@jlab.org>; Planche Thomas <tplanche@triumf.ca>; Salim Ogur <salim.ogur@cern.ch></span><br>
<span>Subject: [FFA_CEBAF_Collab] FFA@CEBAF WG mtg. this Friday, March 15</span><br>
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<span></span><br>
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<span>Dear Colleagues,</span><br>
<span></span><br>
<span></span><br>
<span></span><br>
<span></span><br>
<span>We will continue our design efforts this Friday, March 15, at 11:00 am.</span><br>
<span></span><br>
<span>* Permanent magnets with a sextupole, energy acceptance - Stephen, Dejan</span><br>
<span>* AOB - ALL</span><br>
<span></span><br>
<span>Please, follow a ZOOM invitation below.</span><br>
<span></span><br>
<span></span><br>
<span></span><br>
<span></span><br>
<span>Cheers,</span><br>
<span></span><br>
<span></span><br>
<span></span><br>
<span></span><br>
<span>Alex</span><br>
<span></span><br>
<span>___________________________________</span><br>
<span></span><br>
<span>S. Alex Bogacz,</span><br>
<span></span><br>
<span>Accelerator Physics Group Leader</span><br>
<span></span><br>
<span>Center for Advanced Studies of Accelerators</span><br>
<span></span><br>
<span>Jefferson Lab</span><br>
<span></span><br>
<span>12000 Jefferson Avenue,</span><br>
<span></span><br>
<span></span><br>
<span></span><br>
<span></span><br>
<span></span><br>
<span>ZOOM connection:</span><br>
<span></span><br>
<span>The link is here: https://urldefense.com/v3/__https://jlab-org.zoomgov.com/j/1614898082?pwd=TnUzMS81M2sxbDZIbERJU01tYkJCQT09__;!!P4SdNyxKAPE!AcpwSnCPikr_D_8MO9mIn7cqIkDms6zOg-wZGJNp7atIoh_j1JwnxPv3anxqkYBPeNObKuhjCm8diyImAupOz30FeT0$</span><br>
<span></span><br>
<span>In case of problems, the zoom room is below:</span><br>
<span></span><br>
<span>Meeting ID: 161 489 8082</span><br>
<span></span><br>
<span>Passcode: 123456</span><br>
<span></span><br>
<span>________________________</span><br>
<span></span><br>
<span></span><br>
<span>_______________________________________________</span><br>
<span>FFA_CEBAF_Collab mailing list</span><br>
<span>FFA_CEBAF_Collab@jlab.org</span><br>
<span>https://mailman.jlab.org/mailman/listinfo/ffa_cebaf_collab</span><br>
<span></span><br>
<span>_______________________________________________</span><br>
<span>FFA_CEBAF_Collab mailing list</span><br>
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