<html><body><div style="color: rgb(0, 0, 0); font-family: arial,helvetica,sans-serif; font-size: 12pt;"><div><font face="Tahoma">Reminder:</font><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;"><br><div><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>RHIC Performance with Stochastic Cooling for Ions and Electron Lenses for Protons<br></div><br><div>Wolfram Fischer<br></div><div>Brookhaven National Laboratory<br></div><br><div><p style="margin: 0px; text-align: justify; vertical-align: baseline; unicode-bidi: embed; direction: ltr;" data-mce-style="margin: 0px; text-align: justify; direction: ltr; unicode-bidi: embed; vertical-align: baseline;"><span style="font-size: 12pt;" data-mce-style="font-size: 12pt;"><span style="color: black; font-family: Arial;" data-mce-style="font-family: Arial; color: black;">The Relativistic Heavy Ion Collider (RHIC) has two main operating modes with heavy ions and polarized protons respectively. In addition to a continuous increase in the bunch intensity in all modes, two major new systems were completed recently mitigating the main luminosity limit and leading to significant performance improvements. For heavy ion operation stochastic cooling mitigates the effects of </span><span style="color: black; font-family: Arial;" data-mce-style="font-family: Arial; color: black;">intrabeam</span><span style="color: black; font-family: Arial;" data-mce-style="font-family: Arial; color: black;"> scattering, and for polarized proton operation electron lenses mitigate the beam-beam effect. We present the performance increases with these upgrades for heavy ions and polarized protons, as well as an overview of all operating modes past and planned. The largest performance upgrade under way is a bunched beam electron cooler to increase the luminosity of </span><span style="color: black; font-family: Arial;" data-mce-style="font-family: Arial; color: black;">Au+Au</span><span style="color: black; font-family: Arial;" data-mce-style="font-family: Arial; color: black;"> operation at the lowest energies, with Au beam stored below the nominal injection energy.</span></span></p></div><br><div>Friday, February 19, 2016<br></div><div>11:00 a.m.<br></div><div>ARC, Room 231/233<br></div><br><div>Seminar archives are found here: <a href="https://www.jlab.org/accel/seminars/2016.html" target="_blank" data-mce-href="https://www.jlab.org/accel/seminars/2016.html">https://www.jlab.org/accel/seminars/2016.html</a><br></div><br><div id="c527d5bf-234f-450e-be05-77753629e03f"><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:950eee9703aab6b66e1cf6b52fbf65e1b17186c9@zimbra" data-mce-style="border: 0px none;" data-mce-src="cid:950eee9703aab6b66e1cf6b52fbf65e1b17186c9@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><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>