EST Progress

External Silicon Tracker (EST)
Progress and usefull information
Access - Documentation - Results

- Get access to and running the code
The code is currently available in my home directory at RCF under the directory /afs/rhic/star/users/lmartin/public/star/est/StRoot/St_est_Maker and splitted in several files (the files describing the objects are located in the Infrastructure subdirectory):

St_est_Maker.h : header file for the generic methods and objects
St_est_Maker.cxx : code file for the generic methods and objects
St_est_Init.cxx : code file for the initializing methods
St_est_Projection.cxx : code file for the track projection methods
St_est_Tracking.cxx : code file for the tracking methods
St_est_TrackSelection.cxx : code file for the track selection methods
St_est_RefitBranch.cxx : code file for the fitting methods
St_est_Eval.cxx : code file for the evaluation methods
St_est_Wafer.hh : header file for the wafer object
St_est_Hit.hh : header file for the hit object
St_est_Hit.cc : code file for the hit methods
St_est_Branch.hh : header file for the branch object
St_est_Branch.cc : code file for the branch methods
St_est_Track.hh : header file for the track object
St_est_Track.cc : code file for the track methods
St_est_TPCTrack.hh : header file for the TPC track object
St_est_Const.hh : header file for constante definitions

The code is using the EGR fitting routines and some of the StarClassLibrary objects (mostly the StHelix object). The code compiles under Linux and Solaris using the SL00e release of the STAR libraries. It does not mean that it does not work for more recent releases but simply that we did not try to run EST with them.

Once compiled, the main macro to run the code is mysc.C which :

update on open the evaluation log file (see below) and the root file.
load the need libraries
open the event input file
call the St_est_Maker

The evaluation results as well as the running parameters (mParams and mSegment) are output to a file named out.log which is a link to a file to which a version number is appended. This number is updated like any shared library when a piece of code is recompiled. It can be convenient for comparing results obtained in different conditions and especially when playing with the parameters and optimizing them.

Currently for the input file the macro reads a file containing one event in xdf format. The structure of the file is the following :

DataSet	DataSets	Tables	Table Types
main	tpc_hits	tphit	tcl_tphit
	tpc_tracks	tptrack	tpt_track
		mctrk	tte_mctrk
		evaltrk	tte_eval
	svt_hits	scs_spt	scs_spt
	svgpar	config	svg_config
		geom	svg_geom
		shape	svg_shape
	geant	g2t_vertex	g2t_vertex

The svg_shape table is not used anymore. It was previously loaded in order to determine the active area of each wafer. The g2t_vertex table is used to refit the TPC track with the main vertex information. At some point, the geant information should be replaced by something like the main vertex location estimated from EVR. This structure is not mandatory as far as the information is available to fill the objects. The code can be easily modified in order to read the tables from other inputs such as the database for the SVT/SSD geometry.

- Code Documentation

The code is not well documented. Some of the classes and methods are commented.
A preliminary version of a user manual is available here : in ps or pdf
This document is subject to frequent changes. Any comments on improving it are welcome.

- Results

Commented on screen output of EST
Marcelo's page on EST results for year-1
Some results of EST for year-2a geometry
- Impact of the main vertex on the track projection
- Primary versus secondary track Performances
New results of EST for the year 2001
- Maria's page on the evaluation using the Association Maker.
- My page on the Est results using maria's technique and the new fz files.
- My page on the Est results using Est own evaluator and the new fz files.

Lilian MARTIN

Last modified: Fri Apr 6 10:09:21 CEST 2001