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x | ![]() |
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W |
(GeV/c) | (GeV) | (GeV![]() |
(GeV/c) | (GeV/c![]() |
||
1.45 | 4.25 | 4.858 | 0.61 | 0.116 | 0.3823 | 3.985 |
1.20 | 4.50 | 4.007 | 0.48 | 0.096 | 0.3250 | 5.315 |
0.89 | 4.81 | 2.972 | 0.33 | 0.072 | 0.2491 | 6.932 |
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Whitlow | rosetail |
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rates (Whitlow) |
(GeV/c) | (nb/GeV-sr) | (nb/GeV-sr) | (nb/GeV-sr) | (s![]() |
||
1.45 | 2.5554 | 0.5628 | 1.0429 | 0.011 | 1.054 | 0.1569 |
1.20 | 2.7521 | 0.4814 | 2.2178 | 0.034 | 2.252 | 0.2752 |
0.89 | 3.0118 | 0.3738 | 4.3297 | 0.151 | 4.481 | 0.3985 |
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t![]() |
t![]() |
N![]() |
N![]() |
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(GeV/c) | (hours) | (hours) | (f = 0.95) | |||
1.45 | 189.36 | 41.71 | 106975 | 23562 | 2.84% | |
1.20 | 120.58 | 21.09 | 119469 | 20895 | 2.84% | |
0.89 | 95.42 | 11.84 | 136890 | 16990 | 2.84% |
The error of asymmetry is
;
The radiation length for 25 cm
He target is:
before interaction:
10 mil Be + 10 mil Al + 0.012 mm Pyrex
+ 20 cm Air + 25 cm/2 He (10atm) = 0.3574%
after interaction:
25 cm/2 He (10atm) + 10 mil Al + 1.4 mm Pyrex
+ 20 cm Air + 7 mil Kapton + 4 mil Ti = 1.673%
Total cross section is estimated by the sum of Whitlow's fit and elastic tail given by rosetail.f, but only Whitlow's cross section is used for estimating the statistical error and optimize the run plan.