<div dir="ltr">I ran some events with W70/Cu30 and took a quick look, seems quite favorable. Looks like 10% to 15% lower background rates than lead. Too hot off the presses for presentation today of course.</div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, May 13, 2015 at 5:18 PM, Zhiwen Zhao <span dir="ltr"><<a href="mailto:zwzhao@jlab.org" target="_blank">zwzhao@jlab.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Rakitha and I had a short discussion with Roger.<br>
He recommended Copper Tungsten Alloy (W70/Cu30) used by Qweak collimator, which is eat-resistant,<br>
ablation-resistant, highly thermally and electrically conductive, and easy to machine<br>
he had some concerns about neutrons and might be able to join our meeting tomorrow<br>
<span class="HOEnZb"><font color="#888888"><br>
Zhiwen<br>
</font></span><div class="HOEnZb"><div class="h5"><br>
<br>
On 5/12/2015 1:06 PM, Zhiwen Zhao wrote:<br>
> hi, All<br>
><br>
> I see some interesting slides for qweak collimator<br>
> <a href="http://qweak.jlab.org/DocDB/0009/000932/002/Qweak_Slides%20Infrastructure%20Talk%20Mar%2009.pdf" target="_blank">http://qweak.jlab.org/DocDB/0009/000932/002/Qweak_Slides%20Infrastructure%20Talk%20Mar%2009.pdf</a><br>
> <a href="http://qweak.jlab.org/DocDB/0010/001025/001/As-Built%20Dimensions%20of%20the%20Defining%20Collimator.pdf" target="_blank">http://qweak.jlab.org/DocDB/0010/001025/001/As-Built%20Dimensions%20of%20the%20Defining%20Collimator.pdf</a><br>
> We can learn something from their experience.<br>
><br>
> Zhiwen<br>
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