Program Initialization

During the initialization phase of MUFFIN some lookup tables are zeroed and all steering cards are processed. It is possible to create a template of the steering cards file with the current settings, as well as a L^ATEX [38] file which contains the steering cards in the default setting and which can be included in a document.

Most of the remaining initialization work is performed when the first event is read because MUFFIN needs to know the event date to select geometry and calibration data valid for that data taking period:

• read all geometry information
• calculate the calorimeter cell geometry
• read the neighborship relation lookup table
• calculate parameters for fast ray tracing through the calorimeter

Normally all this initialization is only performed a single time, but if MUFFIN is used on data stemming from periods with different geometry setup, MUFFIN can be instructed to redo the initialization for every run.

MUFFIN can perform additional tasks:

• calculate the neighborship relation lookup table.
• create CAR files with the neighborship relation lookup table.
• create a VRML file [39] with the neighborship relation lookup table for every cell type (so not for every cell, but for every neighborship type one file).
• check various geometric algorithms inside the CONDENSOR code.
• check for overlapping cell volumes (which would be a serious mistake in the geometry).
• create a template steering cards file with the current settings.