[BLAST_ANAWARE] reconstruction

From: Tancredi Botto (tancredi@mitlns.mit.edu)
Date: Fri Jun 20 2003 - 18:36:02 EDT


Hello, there are good news from the v3 libBlast candidate good enough that
we should crunch data only this way. Already at this stage (when final
geometry, eloss, final wire.cal are not implemented) data reconstructed
from v3 shows a considerable improvement in resolution. On a few recent
ABS runs - and before kinematical corrections - chris and chi could prove
that the new code provides

d_p 27 MeV (from 65 MeV)
d_theta 0.77 deg (from 1.1)
d_z 1.4 cm (from 2.5)
coplanarity 1.0 deg

as benchmarked from wc_res.C. A few points you ought to know for your
analysis,

- The analysis is still done by hand, the command is the following
        
        cd ~/pro2003/analysis/CRUNCH/v3
        lrn_v3 ###

- The compiled code is in cvs_v3/BlastLib2. It compiles with "make lrn_v3"

_ libBlast-v3 is not backward compatible with a number of our runs
  At this stage is not even tagged, this is the famous 2.96 version...

_ By definition libBlast-v3 only stays in cvs_v3 and is not in the LD path

- While chi and chris have put some effort is done to provide bugfixes
  (when possible) to libBlast.2.20 this is not a priority. However since
  really only the crunch job requires v3, libBlast.2.20 is the default
  library in ~/lib. In this way we don't have to update all our macros, at
  least until v3 is more stable.

_ Keep working off cvs_v2 for changes, they'll be merged at a later stage

-- 
________________________________________________________________________________
Tancredi Botto,  		phone: +1-617-253-9204  mobile: +1-978-490-4124
research scientist		MIT/Bates, 21 Manning Av    Middleton MA, 01949
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