<div class="gmail_quote"><div><br></div><blockquote class="gmail_quote">
If the beam were coming in at an angle like in Oscar's plots, you'd<br>
also think we'd see something in the cross-hair plots. Here's an<br>
attempt to show what I mean:<br>
<a href="http://twist.phys.virginia.edu/%7Ejdm2z/sane/cross-hair.png">http://twist.phys.virginia.edu/~jdm2z/sane/cross-hair.png</a><br>
<br>
I haven't taken a close look at this, but here are a couple slow<br>
raster plots from the 72700's super-imposed upon a picture of the<br>
cross-hairs. Neither of these show the cross-hairs shifted.<br>
<a href="http://www.jlab.org/%7Esanetarget/sane%20pictures/target388.html">http://www.jlab.org/~sanetarget/sane%20pictures/target388.html</a><br>
<a href="http://www.jlab.org/%7Esanetarget/sane%20pictures/target389.html">http://www.jlab.org/~sanetarget/sane%20pictures/target389.html</a><br></blockquote><div><br>Here is the crosshairs for run 72613, which is in my tech-note. I have put two lines of equal length on the graph. They highlight the apparent asymmetric cup/crosshair geometry. <br>
<br>It appears from the image that the crosshairs were not in the middle, but they were, as the photo shows.<br>Also, the radiation damage to the bottom of the cup is consistent with this cross hair image showing the beam hitting something at the bottom. <br>
This could be due to the magnetic field being reversed. <br><br>Cheers,<br>Whit<br><br><br></div></div>