Update on TSF efficiency simulation
I have looked at the unfolded TSF hits for
each of the four sub layers
and calculated the hit efficiency for each of the sub layers
The results are presented in the following plot
Comparing run 16802 and MC bbgeneric (Had selection)
The Fash ADC count cut used was about 130 for all hits.
The TSF-hit eficiency vs. theta looks as follows
We see that we can extract the right TSF efficiency dependence on
theta by getting the hit efficiency for each sub layer about right
The discrapancy between data and MC could appear b/c
of few reason
- I use hadronic events selection, therefore there might be tacks crossing
each other which might lead to too many ghits.
I should first, copy the ghit list in some way and use the earlier ghit
and Second average there charge.
- There need to be backgound overlay although for now it should
not be a big trouple as will be seen in the following
- Another suggestion is more sattled
The question is how sure we are that the MC simulation is doing exactly
the same as the hardware any small difference or bias toward
the third pivot layer makes the segments depends strongly on the LUT
Some background study
In order to address the second possibility it is interesting to
study how the backgound affect the TSF/DCH-hit occupancy,different
segments wieght and so on.
In the following I have looked at the
Run-18084 (Cosmic run) and Run-18562(Cosmic with beam)
The results is as expected the good news is the TSF-hit occupancy
comparison
Another interesting comparison is the
the ratio of each particular weight by the total number of the good segments
close to a track in each event
I plot the ratio vs the SL in order to find out the
effect of backgroud
The same study was done using Run -18084-17077
The results is as expected the good news is the TSF-hit occupancy
comparison
Another interesting comparison is the
the ratio of each particular weight by the total number of the good segments
close to a track in each event
I plot the ratio vs the SL in order to find out the
effect of backgroud
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