Difference between revisions of "Elong-14-03-21"
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| − | For each piece (with the possible exception of the SHMS mid x point), the Li | + | For each piece (with the possible exception of the SHMS mid x point), the Li dominates slightly over the HeD, which would cause the LiD rates to come out slightly higher than the HeD rates. I don't think that's would cause nearly a factor of two difference, though. Something else seems amiss. |
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Revision as of 08:39, 24 March 2014
LiD
I added LiD into my b1 rates calculations, since from the workshop it sounded like it might be a viable alternative for achieving higher polarization than ND3. Below are the results of ND3, LiD, and LiD-as-He2D (since lithium could be thought of as a tightly bound 4He & deuteron) in the calculations. Each calculation assumes identical target geometry (beads & packing fraction), Pzz, and detector acceptance with the only difference being the material itself.
ND3 
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LiD 
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He2D 
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Although I expected the physics rate to double between LiD and He2D (since we doubled the number of accepted deuterons), the difference in the total rate seems weird.
Cross Section Checks
To look into the matter, I started looking at the cross sections and the luminosity*cross sections to see how different Li was from HeD
By Spectrometer
Since it's a little difficult to tell exactly where Li and HeD we overlapping for which spectrometer, I broke it down into each:
| SHMS low x | SHMS mid x | SHMS high x | HMS |
|---|---|---|---|
 |
 |
 |
|
For each piece (with the possible exception of the SHMS mid x point), the Li dominates slightly over the HeD, which would cause the LiD rates to come out slightly higher than the HeD rates. I don't think that's would cause nearly a factor of two difference, though. Something else seems amiss.
