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Please RSVP to: <a class="moz-txt-link-abbreviated"
href="mailto:harris@jlab.org">harris@jlab.org</a> by Wednesday,
November 17th.
<br>
<br>
Feasibility and Conceptual Design of a C.W. Positron Source at CEBAF
<br>
<br>
<b class="moz-txt-star"><span class="moz-txt-tag">*</span>Serkan
Golge<span class="moz-txt-tag">*</span></b>
<br>
North Carolina Central University
<br>
<br>
<big><font color="#000000"><big>*</big></font></big>Due to a
conflict, the Seminar has been moved to:<br>
<big>Thursday, November 18, 2010
<br>
12:00-1:30pm
<br>
CC F113
</big><br>
<br>
Abstract
<br>
<br>
A feasibility study of a CW positron source for the 12 GeV upgrade
at
<br>
Jefferson Lab (JLAB) is provided. The proposed >=100 nA
Continuous
<br>
Wave (CW) positron source at JLAB has several unique and challenging
<br>
characteristics: high current incident electron beam at 126 MeV with
a
<br>
high beam power (up to a MW); CW electron beam and CW positron
production.
<br>
The optimization of the target thickness and beam energy are
completed.
<br>
Three positron injector configurations are proposed; Combined
Function
<br>
Magnet, Two-Dipole and Microtron Dipole configurations. By using 126
MeV
<br>
10 mA e- beam impinging on a 2 mm W target with a 100 micron spot
size,
<br>
we can get up to 3 uA useful e+ current at the North Linac
connection. One
<br>
of the biggest challenges is the target design, which the deposited
power
<br>
is about 60 kW. Possible solutions are presented to address the
target
<br>
issue as well.
<br>
<br>
<br>
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