[DIRC] DRCPROP

[Jochen Schwiening]

And just to reiterate what we said during the EVO session: the latest 
setup, which simulates our 2011 prototype at CERN, is found in 
prototype.cc.
For the DIRC at EIC simulation I recommend that we forget about Marcol and 
use solid fused silica expansion volumes (EV) in drcprop.

A useful first drcprop study could be to look at the number of photons, 
photon thetaC distributions, timing, and hit patterns for pions, kaons, 
and protons with momenta from threshold to 4-6 GeV/c with different 
incident angles to demonstrate what resolution we may need.
For the EV I would assume some reasonably large detector plane with 
either a small depth (i.e. 10cm) and a mid-size depth (30cm). The bar 
could stay at 17mm thickness and 35mm width for now with few meter 
length and particles passing through the bar at roughly realistic angles 
and positions for an EIC central detector.
You will see that the current lens implementation is not so good for 
particle angles perpendicular to the bar, that's why Carsten is 
investigating the anti-reflective coatings. But it's still useful to 
become familiar with DIRC patterns in hit position and timing space for 
different particles, momenta, and angles.

Cheers,
	Joe

On 1/31/2012 5:03 PM, Carsten Schwarz wrote:
> Hi Heghine,
>
> sorry I missed the meeting. I'm not sure if you know this old mail from
> October, I repeate it below. best regards
>
> Carsten
> -----------------------------------------------------------------------
> Hi Pawel,
>
> to install the drcprop routines, do a
>
> svn co https://subversion.gsi.de/fairroot/pandaroot/trunk/drc/drcprop
>
> go to drcprop/examples and do a
>
> make
>
> the test_xxx files in the examples directory are the file with wich we
> are working.
>
> The prototype executable is something more special.
>
>> From the classes in drcprop:
> What is not working (construction site) is PndDrcOptBurle.cxx
> What is not tested yet is PndDrcOptReflGeffcken.cxx (that is coating,
> I'm working on)
>
> if you have doxygen installed (http://doxygen.nl/)
> do in drcprop a
>
> doxygen
>
> and you find at doc/html/index.html
> some description of the classes.
>
> Good point to start with is
>
> test_simple_bar2.cc (most simple example)
> test_simple_bar.cc  (more complicated)
> (look to Readme)
>
> After running test_simple_bar2
>
> do a
>
> root Geo.C
>
> you will see the geometry simulated and photons in color
>
> how to access the ccordinates of the photons is found in test_simple_bar.cc
>
>
> some more general documentation you find in a attached talk.
>
> Best regards
> Carsten
>
>
>
>
>
>
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