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Mon, 13 Dec 2004 

Soon Jun wrote:

 This is just a short summary of action items for
 the L00 parametric CDM development that
 discussed at the informal meeting last Friday:

 1)  a base line test using the current geometric medel:
       Steve will run ntuple jobs to assess qualities of
       the current L00 (geometric) CDM
 2)  make a short guideline describing steps for what to do.
       Steve will send us a summary of what he learned and
       Sebastian will add details for a final guideline
 3)  will look for possibilities of additional manpower for
      coding and tuning jobs.

 We will have short meetings (irregularly) to check the status
 and the next step.  The next meeting will be at 4:00pm this
 Thursday (Dec. 16) at the Duke office.  Thanks, ---Soon

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Fri, 10 Dec 2004 from Sebastian Carron Monterro (carron@fnal.gov)

Steven and Soon,

     This is the email I sent about 3 months ago, with a 
basic plan on how to implement the code for L00, but 
then we did not do anything for I have been extremely 
busy trying to finish my analysis and graduate.

     The basic path to follow is the same, it is established
that I do not have a lot of time to take care of this.
However people in my group could be interested in doing
some of this, so we should discuss a bit of strategy.

Sebastian

On Tue, 14 Sep 2004 carron@phy.duke.edu wrote:
 
>      At the moment what happens is that when L00 is concerned
> the geometric model is called, we want to test first how 
> good or bad of a job this is doing. I am producing ntuples
> now to test it and both Steven and me will run our macros
> and take a look at some basic variables; the same as 
> always: cluster size, charge distribution, geant-Si Cluster
> cenmtroid residuals and so on.
> 
>      Since the Geometric Model is atributing hits just 
> from the path of the particles and does not take into 
> account charge sharing, delta rays or noise, I expect the
> following: the cluster width distribution should show 
> mostly 1 or 2 strip clusters with the data being 
> broader than this, the Cluster charge distribution (the 
> Landau shape) in each strip I expect to be narrower in
> MC than in the data since the tail of such distribution
> is dominated by delta rays, also withoout noise being 
> added we should see a shift in the peak of the Charge 
> distribution. Regarding geant-Si cluster centroid 
> residuals, I expect them to be centered at 0 since the 
> magnetic field plays no effect here.
> 
>     Then the plan is as follow:
> 
>     1)We determine weather the Geometric model is doing
> a good job regarding the geometry of L00, in my past 
> experience the geometry was what most of the time 
> was wrong..
>     2) I will copy the way the Geometric Model handles
> the geometry into the Parametric model code, and fill 
> our Parametric model common block (Parametric model 
> charge sharing, delta rays, etc functions are in 
> Fortran).
>     3) from this I expect the same functions that 
> were applied in other layers to work for Layer 00, 
> with the caveat that we will need a new 
> parametrizations from M. Gold with the new pitches
> for L00, and that we have to imput the right parameters
> into the methods, and of course we have to make some
> small changes to account for the fact that the L00 has 
> only one side (Michael, is there any reason why the
> higher occupancy of L00 would make the methods we 
> use for the other layers not work??? any aproximation 
> that would be wrong???, can you get the parametrizations 
> in the same way that got them for the other layers??-
> remember that we had sepparate parametrization by angle
> bins and this might be even more important in LOO)
>      4) Then we test this new code and I expect that we 
> can tune it in the same way we tuned other layers. From
> discussions with S. Levy he informed me that there are a 
> few special features of this layer, for example there 
> are some cables that are working as antenas and add 
> to the charge distibutions. Our view is that if from 
> our tuning we can tacitly account for these effects
> it does not really matter (for example there could
> be some centroid shifting that results from this that 
> we deal with just with the tunning and not by simulating
> the effect by itself), and if it is not possible to 
> account for these special effects in the tunning we would
> have to add them to the simulation but this is down
> the road.
> 
> 
>    So for now I will be producing some samples and
> testing with S. Levy how things look.
> 
> Sevbastian
> 
> Quoting gold@phys.unm.edu:
> 
> > I would be more than happy to help in any way I can.
> > I can attend a meeting by phone, within constraints
> > of my schedule (mon 1-5, wed 2-5 are bad).  Also,
> > please include me in your future email distributions.
> > 
> > -Michael Gold
> >