Elong-13-04-24
From HallCWiki
Rates Update
→ For the plot below, I assume the following:
Target Material ND3 Target Length 3 cm fdil 6/20 pf 0.8 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
- → The rates note has been updated to fix the sign problems that Oscar and Dustin noted
No Prescales, Max rate = 1kHz
The max SHMS DAQ rate is 1kHz. The estimates above were done to show what we can do without prescales.
<x> dAzz with SHMS dAzz with HMS 0.1 0.0415 0.0448 0.3 0.0419 0.0415 0.5 0.0428 0.0433 0.75 0.042 0.041 1.0 0.0405 0.030
With Prescales, Max rate = 500kHz
The max rate that the SHMS can handle is 500kHz. The estimates above were done to show what we can do with prescales.
<x> dAzz with SHMS dAzz with HMS 0.1 0.00189 0.002 0.3 0.0044 0.00345 0.5 0.0174 0.0132 0.75 0.00121 0.0011 1.0 0.00146 0.00107
--E. Long 19:38, 25 April 2013 (UTC)
