[SBS_sim] Important Bug Fix on background sampling

[Vahe Mamyan]

Hi Evaristo,

It looks like efficiency is higher with this mistake fixed. See attached
file.

Vahe

On Fri, May 20, 2011 at 6:08 AM, Evaristo Cisbani <
evaristo.cisbani at iss.infn.it> wrote:

> Dear All,
>
> Bogdan found a bug in the digitization: the background signal is not
> sampled correctly.
>
> The error is in the transformation of time coordinate, I used for
> sampling, that is:
>
>  tT is the trigger time (that I assume 0)
>  t0 is the first sampling (e.g. -100 ns)
>  tH is the hit time (from -400 ns to 100 ns for background, around 0 for
> signal)
>
> The sampling time I used was: t=t0+tH, while the correct one is: t=t0-tH
> This affects the background but not the signal (being tH ~ 0).
>
> Unfortunately this may have impact on the results.
>
> I fixed the bug and ran digitization again for g20 and g21. The new data
> are posted in the usual directory (wrong data removed).
>
> http://www.iss.infn.it/cisbani/atmp/gemc/production/
>
> I apologize for the mistake!
>
> Evaristo
>
>
> --
>  Evaristo Cisbani                      office : +39 06 4990 2847
>  Istituto Superiore di Sanita`         lab    : +39 06 4990 2347
>  Department of Technology and Health   fax    : +39 06 4990 2137
>  and Istituto Nazionale di Fisica Nucleare Roma - gruppo Sanita`
>  via Regina Elena 299 - 00161 Rome     web    : www.iss.infn.it/cisbani
>  Italy
> ------------------------------------------------------------------------
>
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