<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Hari,<div class=""><br class=""></div><div class="">I wanted to make clear what the LERF can and cannot do in the short term. With only a single cryomodule the maximum energy would be about 45 MeV. At this energy we could accelerate up to about 1 mA, assuming that the 8 kW klystrons are still available. We won’t have a high energy spectrometer however so I am not sure we can measure the energy higher than about 20 MeV. The current available is limited by the klystron power so we might be able to go to 2 mA at 20 MeV. We cannot reach 100 MeV in the current configuration. We could get close if we swapped out the C50 for a C100 but I don’t see use getting permission to do that in the near term. </div><div class=""><br class=""></div><div class="">I also want to clear up what we are promising to do in our statement of work. Are we still going to do a high current, low energy run to test thermal characteristics? We can do this in the straight ahead line (the 2F05 region). Also, can we assume that we will not do any exposures in the LERF injector? It will be to disruptive to LCLS II operations if we do and we would have to build a beam line, which would be rather expensive. Using the 2F line would be much cheaper.</div><div class=""><br class=""></div><div class="">If we run both the high energy and low energy runs in the LERF we will need more than two shifts. Also, we have to have time to do hot check-out and beam line setup and this is in addition to the shifts on the machine. Since we only have to do the injector and one module the preparation would be a couple of weeks to get the gun back up and conditioned, a week to check out the magnets, diagnostics, and vacuum systems and get the RF on, and a week to burn in the RF systems before running. Once all this is done, the labor needed to run the machine is pretty small, especially if CEBAF is running. </div><div class=""><br class=""></div><div class="">As far as personnel goes, it is not clear what we do for George K.’s part. We had 11 person weeks for him so I don’t know who we would charge to. Also I thought that we were funding a student at North Dakota. Are we still funding a student at New Mexico. Can he or she be based at Jefferson Lab?</div><div class=""><br class=""></div><div class="">Steve Benson<br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On May 28, 2018, at 9:31 PM, Hari Areti <<a href="mailto:areti@jlab.org" class="">areti@jlab.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class=""><div style="font-family: arial, helvetica, sans-serif; font-size: 12pt;" class=""><div class="">Please ignore the previous :"Dear Marc" Attachment. I have added an item which I missed previously. Thanks.<br class=""></div><div class="">-H<br data-mce-bogus="1" class=""></div><hr id="zwchr" data-marker="__DIVIDER__" class=""><div data-marker="__HEADERS__" class=""><b class="">From: </b>"Hari Areti" <<a href="mailto:areti@jlab.org" class="">areti@jlab.org</a>><br class=""><b class="">To: </b>"isotope-prod" <<a href="mailto:isotope-prod@jlab.org" class="">isotope-prod@jlab.org</a>><br class=""><b class="">Cc: </b>"Steve Benson" <<a href="mailto:felman@jlab.org" class="">felman@jlab.org</a>>, "Mike Spata" <<a href="mailto:spata@jlab.org" class="">spata@jlab.org</a>>, "Todd" <<a href="mailto:satogata@jlab.org" class="">satogata@jlab.org</a>><br class=""><b class="">Sent: </b>Monday, May 28, 2018 8:55:33 PM<br class=""><b class="">Subject: </b>Letter to Marc Garland - moving all experiemts to LERF<br class=""></div><div class=""><br class=""></div><div data-marker="__QUOTED_TEXT__" class=""><div style="font-family: arial, helvetica, sans-serif; font-size: 12pt;" class=""><div class=""><span style="font-family: arial, helvetica, sans-serif;" class="">Dear Collaborators,</span><br class=""></div><br class=""><div class=""><span style="font-family: arial, helvetica, sans-serif;" class="">Here is a draft letter to be sent to Marc Garland enumerating the changes in our proposal.Send your feedback. We should plan to send it to Marc by week's end.</span><br class=""></div><div class=""><span style="font-family: arial, helvetica, sans-serif;" class="">I also would like to add personnel changes as follows:</span><br class=""></div><br class=""><div class=""><div style="margin: 0px;" class=""><span style="font-family: arial, helvetica, sans-serif;" class="">The following set shows minor changes of personnel that do not impact the execution of the proposal</span></div><div style="margin: 0px;" class=""><span style="font-family: arial, helvetica, sans-serif;" class=""><br class=""></span></div><div style="margin: 0px;" class=""><span style="font-family: arial, helvetica, sans-serif;" class="">Dr. Andrew Hutton stepped down as Associate Director of Accelerators and is a full time scientist at the lab.<br class=""></span></div><div style="margin: 0px;" class=""><span style="font-family: arial, helvetica, sans-serif;" class="">Prof. Douglas Wells moved from SDSMT to New Mexico Institute of Mining and Technology and continues to participate in the collaboration<br class=""></span></div><div style="margin: 0px;" class=""><span style="font-family: arial, helvetica, sans-serif;" class="">Dr. George Kharashvili left the lab<br class=""></span></div><div style="margin: 0px;" class=""><span style="font-family: arial, helvetica, sans-serif;" class=""><br class=""></span></div><div style="margin: 0px;" class=""><span style="font-family: arial, helvetica, sans-serif;" class="">The work that George has been doing should be picked up by some one<br class=""></span></div><div style="margin: 0px;" class=""><span style="font-family: arial, helvetica, sans-serif;" class=""><br class=""></span></div><div style="margin: 0px;" class=""><span style="font-family: arial, helvetica, sans-serif;" class="">Other things to note.-<br class=""></span></div><div style="margin: 0px;" class=""><span style="font-family: arial, helvetica, sans-serif;" class=""><br class=""></span></div><div style="margin: 0px;" class=""><span style="font-family: arial, helvetica, sans-serif;" class="">Doug:<br class=""></span></div><div style="margin: 0px;" class=""><span style="font-family: arial, helvetica, sans-serif;" class="">We said that you had identified a student when you ere at SDSMT. Do you want to address that?<br class=""></span></div><div style="margin: 0px;" class=""><span style="font-family: arial, helvetica, sans-serif;" class=""><br class=""></span></div><div style="margin: 0px;" class=""><span style="font-family: arial, helvetica, sans-serif;" class="">Kevin Jordan and Steve Benson:<br class=""></span></div><div style="margin: 0px;" class=""><span style="font-family: arial, helvetica, sans-serif;" class=""><br class=""></span></div><div style="margin: 0px;" class=""><span style="font-family: arial, helvetica, sans-serif;" class="">I did not want to change the energies we planned to use at CEBAF injector. I am assuming that we can use LERF to reproduce the energies.<br class=""></span></div><div style="margin: 0px;" class=""><span style="font-family: arial, helvetica, sans-serif;" class="">In the figure in the letter you will see that I identified a place for higher energy LERF beam. Please verify and modify as suitable.<br class=""></span></div><div style="margin: 0px;" class=""><span style="font-family: arial, helvetica, sans-serif;" class=""><br class=""></span></div><div style="margin: 0px;" class=""><span style="font-family: arial, helvetica, sans-serif;" class="">Steve Benson:<br class=""></span></div><div style="margin: 0px;" class=""><span style="font-family: arial, helvetica, sans-serif;" class=""><br class=""></span></div><div style="margin: 0px;" class=""><span style="font-family: arial, helvetica, sans-serif;" class="">We will have to edit the budget numbers on page 1 of the proposal with the LERF hot checkout costs. Please work with Kelly Hanifan to get a revised FWP.<br class=""></span></div><div style="margin: 0px;" class=""><span style="font-family: arial, helvetica, sans-serif;" class=""><br class=""></span></div><div style="margin: 0px;" class=""><span style="font-family: arial, helvetica, sans-serif;" class="">Thanks.<br class=""></span></div><div style="margin: 0px;" class=""><span style="font-family: arial, helvetica, sans-serif;" class=""><br class=""></span></div><div style="margin: 0px;" class=""><span style="font-family: 'Times New Roman','serif';" class="">-H<br class=""></span></div><div style="margin: 0px;" class=""><span style="font-family: 'Times New Roman','serif';" class=""><br class=""></span></div><div style="margin: 0px;" class=""><span style="font-family: 'Times New Roman','serif';" class=""><br class=""></span></div><div style="margin: 0px;" class=""><span style="font-family: 'Times New Roman','serif';" class=""><br class=""></span></div></div></div><br class=""></div></div></div><span id="cid:F3DA69F5-553F-40BC-BC15-4E376B8B9834@jlab.org"><Letter to Marc Garland.docx></span></div></blockquote></div><br class=""></div></body></html>