Prototype 0
Memo describing the comparison between DIRC prototype-0 and simulation.
The following plots compare the DIRC prototype-0 data (single Burle pmt glued
to a 120 cm quartz bar). For both there is a plot of the data plus a smooth
curve representing the simulation.
This plot shows the dependence on dip angle. It uses measured transmission
curves, Burle/Quanticon q.e. curve (but adds 0.092 estimated for the 290 nm bin
where there is no measurment) and an internal reflection coefficient of 0.9998.
This plot shows the dependence on Z at a fixed dip angle.
The following postscript files contain these plots varying several parameters.
Each file contains four plots. For both the dip angle and Z dependences there
is a plot of the actual simulation values then a plot of the data plus a smooth
curve representing the simulation.
refl_9998.ps
This is our best description of the data. It uses measured transmission
curves, Burle/Quanticon q.e. curve (but adds 0.092 estimated for the 290nm bin
where there is no measurement), internal reflection coefficient of 0.9998.
new_refl_9998.ps
The angular dependendence curve, but with the data reduced by 2.5%.
refl_9995.ps
Same as before but with internal reflection coefficient of 0.9995.
new_refl_9995.ps
The angular dependendence curve, but with the data reduced by 2.5%.
refl_1.ps
Same as before but with internal reflection coefficient of 1.0000.
half_290.ps
Same as before but with a factor of two smaller quantum efficiency in the
290nm bin (4.6%).
double_290.ps
Same as before but with a factor of two larger quantum efficiency in the
290nm bin (18.4%).
fudge.ps
Same as 1. but with absorption values increased by an overall factor of
three. This is what we think Brian used for his BBSIM work (as applied to the
prototype-0 so you should compare this with the previous plots).
Memo describing the analysis of the data of DIRC prototype I.
Resolution for the Cherenkov angle with Prototype I
