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<p>horizontal axis is distance along the machine in meters</p>
<p>vertical axis is +/-5 sigma beam envelope in m for beam scattered
(single event) at each of 15 slices along the target; the various
curves (alternately red and blue) show effect of finite target
length. <br>
</p>
<p>dashed lines are vacuum chamber walls - horizontal (blue),
vertical (yellow/orange).</p>
<p>To calibrate, we have at time seen losses in places with 5 cm
bore and 1 mm sigma, so the fill factor is (very) large...</p>
<p><br>
</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 5/18/2016 2:54 PM, Glenn Randall
wrote:<br>
</div>
<blockquote
cite="mid:CAA1esmUiPDadk0+xdjy6nyjQCmXfBqf9vQV4yEcCc3d3rWD3VQ@mail.gmail.com"
type="cite">
<div dir="ltr">What are the units on this? And where exactly is 0
on the x-axis?</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Wed, May 18, 2016 at 9:22 AM, David
Douglas <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:douglas@jlab.org" target="_blank">douglas@jlab.org</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000"> here are plots of the
horizontal (top) and vertical (bottom) 5 sigma envelopes
with scattering. Dotted lines are horizontal (blue) and
vertical (yellow) aperture. <br>
<br>
I heated the beam up enough to give about 250 ppm loss in
the Moller dump, and worked the recovery match to try to
fit through the back end of the machine. <br>
<br>
Anyone remember how far the HOM probes stick into the
F-100 aperture? I recall it as either 47 or 43 mm diameter
aperture<br>
<br>
This is going to be interesting...<br>
<br>
DD<br>
<br>
<img src="cid:part2.CD0D8910.1437770C@jlab.org" alt=""><br>
<img src="cid:part3.D52E6C8F.3BACC3ED@jlab.org" alt=""><br>
<br>
<br>
<br>
<div>On 5/17/2016 2:36 PM, Stephen Benson wrote:<br>
</div>
<blockquote type="cite">
<pre>I have attached a release version of the spreadsheet that lists the elements in the 4F line during the DarkLight run. The philosophy of this experiment is to use existing equipment wherever possible. We will be using skew quads and supports from the 3F line and the last few girders of the UV line (8F region). Column C is the position along the beam line. The number of significant figures indicate how well we care about the position. Those with 5 sig. figs. need to be aligned to the typical 250 um accuracy.
Column D is the new nomenclature for the setup. The color indicates the system (red is magnets, blue is vacuum, and green is I&C). Column G is the old location of the element. The color code is
green - No modifications,
gold - moved but not modified, and
red - modified or new.
Pay attention to the comments in column H. They provide more detail. Let me know if you have questions or notice any errors.
Steve Benson
</pre>
<br>
<fieldset></fieldset>
<br>
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</pre>
</blockquote>
<br>
</div>
<br>
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rel="noreferrer" target="_blank">http://mailman.mit.edu/mailman/listinfo/darklight</a><br>
<br>
</blockquote>
</div>
<br>
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</blockquote>
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