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<div class="moz-cite-prefix">Good afternoon,<br>
<br>
The tech note has been updated. In particular, Eq.s 8 and 9
demonstrate the reduction of terms by having an unpolarized beam.<br>
<br>
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charset=ISO-8859-1">
<a
href="http://nuclear.unh.edu/%7Eelong/analysis_files/2013-05-24/b1_extra_asyms.pdf">http://nuclear.unh.edu/~elong/analysis_files/2013-05-24/b1_extra_asyms.pdf</a><br>
<br>
Do we have an estimate of the size and uncertainties on each of
the asymmetries that we're going to have to deal with if the beam
is polarized? I can include those in the note as well.<br>
<br>
Take care,<br>
Ellie<br>
<pre class="moz-signature" cols="72">Elena Long, Ph.D.
Post Doctoral Research Associate
University of New Hampshire
<a class="moz-txt-link-abbreviated" href="mailto:elena.long@unh.edu">elena.long@unh.edu</a>
<a class="moz-txt-link-abbreviated" href="mailto:ellie@jlab.org">ellie@jlab.org</a>
<a class="moz-txt-link-freetext" href="http://nuclear.unh.edu/~elong">http://nuclear.unh.edu/~elong</a>
(603) 862-1962</pre>
On 05/24/2013 03:20 PM, Elena Long wrote:<br>
</div>
<blockquote cite="mid:519FBD72.7040800@jlab.org" type="cite">
<pre wrap="">Good afternoon,
With Pb=0, we'd be left with just the 1/2*Pzz*Azz and Pz*A_V^d terms,
correct? I'll update the end of the tech note to include the Pb=0 terms.
By the way, if anyone needs access to the *.tex it's available in the
same folder as the tech note, just delete the "pdf" in the URL and
replace it with "tex"
Take care,
Ellie
Elena Long, Ph.D.
Post Doctoral Research Associate
University of New Hampshire
<a class="moz-txt-link-abbreviated" href="mailto:elena.long@unh.edu">elena.long@unh.edu</a>
<a class="moz-txt-link-abbreviated" href="mailto:ellie@jlab.org">ellie@jlab.org</a>
<a class="moz-txt-link-freetext" href="http://nuclear.unh.edu/~elong">http://nuclear.unh.edu/~elong</a>
(603) 862-1962
On Fri 24 May 2013 03:07:34 PM EDT, O. A. Rondon wrote:
</pre>
<blockquote type="cite">
<pre wrap="">Hi Karl,
Thank you for forwarding the info. That is what I asked about the laser
light. I think we should ask for it.
One thing I would suggest we could do at the presentation is to show a
slide with all the asymmetries that Ellie has collected, and then follow
it with the same slide, but with P_b = 0, to show the enormous
simplification. It could be compelling, especially since we only want <
200 nA.
Cheers,
Oscar
Karl Slifer wrote:
</pre>
<blockquote type="cite">
<pre wrap="">---------- Forwarded message ----------
From: *Jay Benesch*
Date: Friday, May 24, 2013
Subject: PR12-13-011
To: Karl Slifer <a class="moz-txt-link-rfc2396E" href="mailto:karl.slifer@unh.edu"><karl.slifer@unh.edu></a>
Cc: <a class="moz-txt-link-abbreviated" href="mailto:marcy@jlab.org">marcy@jlab.org</a>, <a class="moz-txt-link-abbreviated" href="mailto:hansknec@jlab.org">hansknec@jlab.org</a>
Karl,
I was wrong. I just spoke with Marcy. Linearly polarized red light on the
existing cathode would give you unpolarized electrons. All one would have
to do is remove the unit that turns linear to circular polarization.
Unfortunately, this is done on all three laser beams with the same unit so
all halls would have to agree. I couldn't reach John Hansknecht to learn
whether there's enough room to rebuild the laser table to allow the hall C
beam to bypass the unit while getting to the cathode at the right time. I
doubt it, but John does extraordinary things.
The gun group is also working with another cathode with high QE in green
light and no polarization but there is some valid reluctance to put it in
the CEBAF production injector due to "volatility" (my word - the stuff can
move within the chamber if too much light gets to it). It needs to stay in
vacuum so it can't be installed in the old gun.
Jay
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