March 23,1998

Simulation Meeting

Report on SvtDMGeant

status

Paola Grosso

INFN - Torino

Introduction:

Key word: ------> DMGeant

which means "DetectorModel to Geant interface".

The DetectorModel to Geant interface defines the detector geometry for GEANT, by extracting the material and the geometry information from the DetectorModel based description of the detector.
The GEANT geometry is then produced via EucIntfce package.
For GEANT3 this means the production of a call list file which has then to be read in by BBSIM.

SVT implementation of the DetectorModel to GEANT interface:

Packages ( available via CVS):

AbsDMGeant provides the abstract interface that should be eventually used by all the subdetectors.

Svt DMGeant contains the SVT specific class.

- implements the SVT specific functions for translating the material description;

- implements the SVT specific definition of tracking media;

- implements the SVT specific functions for translating the SVT geometry.

Geometry translation:

this translation required some small changes into SvtGeom ( the SVT package which defines the

geometry used in reconstruction using DetectorModel).

At present there's a first version which translate wafers, ribs, support bars

and rings volumes ( all the volumes in the Svt detector as described in SvtGeom) and position

them in the global reference frame.

The corresponding call list file svt_call_list.dat is produced with all the needed information.

Next (immediate) steps:

- check the consistency of what done until now, comparing with the dbio generated geometry.

........ then:

- add the volumes not yet described in SvtGeom and the corresponding space information;

- complete the material, mixture and tracking media description;

- validate the complete SVT description obtained via SvtDMGeant versus the one obtained via gnssvd.

For further information contact me at: grosso@to.infn.it