Agenda

                         Detector Simulation Meeting
                         Jun 10, 1999 at 4:00pm
                          B0 pump room

                                Agenda

1. news and announcements
2. status of new geometry - Chris Green (cancelled)
3. what did we learn about CDF magnetic field - Darin Acosta
4. update on the MC generators (Pasha)
5. using the shared libraries (Pasha)
6. other issues (if any)


T.V. link available:

Minutes as remembered by Pasha - please let me know about any corrections to be made.

1. news and announcements

new public release of CDF Run II software is expected next week
ROOT version 2.22/04 is out, it is installed on CDFSGA.

2. What did we learn about the magnetic field (Darin)

Darin has been looking at the magnetic field as returned by the the magnetic field routine GeometryBase/gufld.F (direct anchestor of Run I geom/bfield.F). He has been running ROOT script test_bfield.C (which should not be considered as an example of well-written C++ code) interactively from within CDF2SIM. For example the following sequence of commands

          cdf2sim.exe
          root
          .x test_bfield.C(10.)

plots z- and radial components of the magnetic field as a function of z-coordinate at R=10 cm

slide 1: dependence of the magnetic field on Z-coordinate for radii 0, 24.9,25.1,149.0,149.1 cm
slide 2: dependence of the magnetic field on Z-coordinate for radii 150.,207., 208.,345., 346. cm
slide 3: regions in R-Z where the CDF magnetic field has been mapped (back in 1985...)

3. update on the MC generators

GeneratorModule: modified to call QQ
BGEN: works with QQ
HERWIG: fixes by Jeremy Lys commited into repository. When the notes are being written (Jun 15) HERWIG linked into CDF2SIM, so everybody who uses CDF2SIM can run HERWIG. No examples yet. Plan to hear from Jeremy at the next detector simulation meeting.

4. using the shared libraries

need shared libs to do profiling on IRIX

use of the shared libs speeds up linking on Linux to the great extent

managed to link CERNLIB into shared libs on both Linux and IRIX

first observable results - size of CDF2SIM executable on disk

41 MBytes in development
23 MBytes - version linked against the shared libs

size of e1 executable on disk

17 MBytes in development
0.4 MBytes - version linked against the shared libs

note that not all the libraries used have been built as shared - minutes submitted by Pasha