<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Eric,<div><br></div><div>My edits are attached.</div><div><br></div><div>Paul<br><div><div>On Mar 24, 2011, at 3:34 52, Eric Voutier wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">
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<div class="moz-text-html" lang="x-western"><p class="MsoNormal" style="margin-bottom: 0.0001pt; text-align:
justify; line-height: normal;"><span style="font-size: 12pt;
font-family: "Times New Roman";" lang="EN-US">Dear
all,<br>
</span></p><p class="MsoNormal" style="margin-bottom: 0.0001pt; text-align:
justify; line-height: normal;"><span style="font-size: 12pt;
font-family: "Times New Roman";" lang="EN-US">Here
is an abstract that Jonathan prepared and wishes to submit at
the HEP2011 conference that<br>
will be hold in Grenoble in july. Jonathan's status at that
period is not yet settled but it would<br>
happen right after his defense. <br>
Please send me comments and questions by wednesday next week.</span></p><p class="MsoNormal" style="margin-bottom: 0.0001pt; text-align:
justify; line-height: normal;"><span style="font-size: 12pt;
font-family: "Times New Roman";" lang="EN-US"><br>
Thanks, Eric<br>
<br>
</span></p><p class="MsoNormal" style="margin-bottom: 0.0001pt; text-align:
justify; line-height: normal;"><span style="font-size: 12pt;
font-family: "Times New Roman";" lang="EN-US">--------------
Proposed abstract -----------<br>
</span></p><p class="MsoNormal" style="margin-bottom: 0.0001pt; text-align:
justify; line-height: normal;"><span style="font-size: 12pt;
font-family: "Times New Roman";" lang="EN-US">The
Polarized Electrons for Polarized Positrons (PEPPo)
experiment, planned at Jefferson Lab to <br>
demonstrate the transfer of polarization from a low energy
(<10 MeV) electron beam to positrons <br>
via Bremsstrahlung and pair creation in a single target, is
discussed. </span></p><p class="MsoNormal" style="margin-bottom: 0.0001pt; text-align:
justify; line-height: normal;"><span style="font-size: 12pt;
font-family: "Times New Roman";" lang="EN-US">Positron
production in particle accelerators widely relies on the
creation of electron-positron <br>
pairs, however, if the incident high energy particle (photon
or lepton) is polarized then the resultant <br>
products will carry some portion of the polarization. Indeed,
this approach has been successfully <br>
tested using polarized photons created with a multi-GeV
electron accelerator to generate positrons <br>
with polarization >80%. Alternatively, an incident
polarized electron beam should offer the same <br>
potential.<span style=""> </span>Although pair creation
yield suffers at low energy, recent advances of spin polarized
<br>
electron sources at Jefferson Lab to sustain milliampere
polarized electron beams suggests that a <br>
polarized positron source based upon a low energy <10 MeV
polarized electron beam may <br>
be attractive in some applications.<span style=""> </span>Further,
a successful demonstration of this technique <br>
would provide useful information to potentially cast a similar
positron source using an even <br>
higher electron beam energy (100-500 MeV).<span style=""> </span></span></p><p class="MsoNormal" style="margin-bottom: 0.0001pt; text-align:
justify; line-height: normal;"><span style="font-size: 12pt;
font-family: "Times New Roman";" lang="EN-US">An
overview of the physics case, design simulation and a
description of the PEPPo experiment <br>
will be presented.</span></p>
</div>
</div>
<span><voutier.vcf></span>_______________________________________________<br>PEPPo mailing list<br><a href="mailto:PEPPo@jlab.org">PEPPo@jlab.org</a><br>https://mailman.jlab.org/mailman/listinfo/peppo<br></blockquote></div><br><div>
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"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><pre cols="72" class="moz-signature"><font class="Apple-style-span" face="Helvetica"><span class="Apple-style-span" style="white-space: normal; "><font class="Apple-style-span" face="monospace"><span class="Apple-style-span" style="white-space: pre; "><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 10px/normal Monaco; ">-- </div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 10px/normal Monaco; ">-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 10px/normal Monaco; "> Paul Gueye</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 10px/normal Monaco; ">* Hampton University</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 10px/normal Monaco; "> Physics Department</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 10px/normal Monaco; "> Hampton, VA 23668</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 10px/normal Monaco; "> W: (757) 727-5542</div><div style="margin-top: 0px; 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