<html><body><div style="color: rgb(0, 0, 0); font-family: arial,helvetica,sans-serif; font-size: 12pt;"><div><br></div><div><br></div><hr id="zwchr" data-marker="__DIVIDER__"><div data-marker="__HEADERS__"><b>From: </b>"Audrey Nichols" <anichols@jlab.org><br><b>Sent: </b>Monday, April 13, 2015 9:55:50 AM<br><b>Subject: </b>Accelerator Seminar: 4/16/15 - Colwyn Gulliford<br></div><div><br></div><div data-marker="__QUOTED_TEXT__"><div style="color: rgb(0, 0, 0); font-family: tahoma,new york,times,serif; font-size: 12pt;" data-mce-style="font-family: tahoma,new york,times,serif; font-size: 12pt; color: #000000;"><div>ACCELERATOR SEMINAR<br></div><br><div>High Bunch Charge Measurements in the Cornell Photoinjector<br></div><br><div>Colwyn Gulliford<br></div><div>Cornell University<br></div><br><div>This talk focuses on recent transverse emittance and longitudinal current profile measurements of high bunch charge (100 - 2000 pC) beams produced in the DC gun-based Cornell Photoinjector. In these measurements, the cathode thermal emittance dominates the final 95% emittance measured at 9-9.5 MeV for bunch charges up to 300 pC. The agreement between optimized 3D space charge simulations and measurement will be discussed, as well as the relationship between the quality of the initial transverse laser distribution and the final measured and simulated optimal emittances for charges up to 1 nC. Finally, a brief discussion on the most recent high average current experiments will be given.</div><br><div>Thursday, April 16, 2015<br></div><div>11:00 a.m.<br></div><div>CEBAF Center, Room L102<br></div><br><br><div><span class="ZmSearchResult" id="DWT1509"><span class="ZmSearchResult" id="DWT1580">Seminar</span></span> archives are found here: <span class="Object" id="OBJ_PREFIX_DWT1510_com_zimbra_url"><span class="Object" id="OBJ_PREFIX_DWT1581_com_zimbra_url"><a href="http://wwwold.jlab.org/accel/seminars.html" target="_blank" data-mce-href="http://wwwold.jlab.org/accel/seminars.html">http://wwwold.jlab.org/accel/seminars.html</a></span></span></div><div><span class="Object"><span class="Object"><br></span></span></div><div><span class="Object"><span class="Object"><br></span></span></div><div><div>------<br><b><span style="font-size: small;" data-mce-style="font-size: small;">Audrey N. Barron</span></b><br><span style="font-size: small;" data-mce-style="font-size: small;">Administrative Assistant</span><br><span style="font-size: small;" data-mce-style="font-size: small;">Center for Advanced Studies of Accelerators</span><br><span style="font-size: small;" data-mce-style="font-size: small;">Jefferson Lab</span><br><span style="font-size: small;" data-mce-style="font-size: small;">757-269-7327</span><br><span style="font-size: small;" data-mce-style="font-size: small;"><a href='http://<a href="mailto:anichols@jlab.org">anichols@jlab.org</a>Email Me</a> ' target="_blank" data-mce-href='http://<a href="mailto:anichols@jlab.org">anichols@jlab.org</a>Email Me</a> '>anichols@jlab.org</a></span> / <span style="font-size: small;" data-mce-style="font-size: small;"><a href="http://www.jlab.org" target="_blank" data-mce-href="http://www.jlab.org">www.jlab.org</a></span> <br><br><img style="border: 0px currentColor; border-image: none;" src="cid:db1f4a64fa738f8780839ca64065f077a8beb062@zimbra" data-mce-style="border: 0px none;" data-mce-src="cid:db1f4a64fa738f8780839ca64065f077a8beb062@zimbra"><br></div></div></div><br>_______________________________________________<br>Accelerator_staff mailing list<br>Accelerator_staff@jlab.org<br>https://mailman.jlab.org/mailman/listinfo/accelerator_staff<br></div></div></body></html>