Elong-13-04-24

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Rates Update

→ For the plot below, I assume the following:

Target Material ND3
Target Length 3 cm
Pzz 20%
E0 11 GeV
xBjorken 0.1, 0.3, 0.5, 0.75, 1.0
Q2 Variable
θq Calculated
θe' Calculated
E' Calculated
W Calculated
→ Total rates have been included, and are shown plotted with the D2 rates
→ Error bars shown are statistical only
→ I found a slight bug from previous calculations: I was assuming the time output was in hours, but it was in fact in days
→ This has now been corrected, but all previous time calculations are under-estimated by a factor of 24
→ F1 and F2 are now calculated using the Bosted fits, which lets us extend into a higher x range
→ It is valid for 0<W<3.2 GeV and 0.2<Q2<5 GeV2


No Prescales, Max rate = 1kHz

1kHz Max Rate
The max SHMS DAQ rate is 1kHz. The estimates above were done to show what we can do without prescales.

--E. Long 15:49, 18 April 2013 (UTC)