Current Limitations

Listed here are the current limitations of the geometry.

• Some of the numbers used in the geometry pre-date the final design of certain elements of the detector. All the data has to be reviewed.

• The way the chimney intrudes into the vessel is not accurately modelled; it is represented by allowing the chimney cylinder to end slightly inside the vessel.

• There are no missing PMTs and the ropes do not extend through the panel zones.

• Each PMT is depicted is encased in an hexagonal prism; this represents the interface between the detector and PMT geometries. This prism currently is constructed of ABS, apart from the concentrator. So particles traveling outwards see a correct surface, but from other directions may see a fictitious surface.

• The phototube geometry does not support the 'NEAR' operation.

• There are minor approximations and simplifications made in describing the positions and orientations of the PMTs. This is discussed further in ???

• The panel zones completely encase the panels themselves. This means that, in some cases, there are a few cms of panel zone media (H2O) behind panels before the inner darkness is reached.

• The inner darkness contains a uniform medium, there is not attempt to model the PMT cabling, or even the fact that there is a radial (R) or Z medium dependence (less cables at large R and low Z).

• There are no PSUP supports.