RICH: definition of the properties of a pm type.
RICH: definition of the properties of a pm type.CPMT: riCh PhotoMultiplier Type
A PM type has to have a certain name, which is stored as type. The number of channels in x and in y direction nx and ny has to be specified, as well as the dimensions xdiv and ydiv of the at the moment square area, which one channel covers. The wavelength dependent efficiency off a certain type is stored beginning in the row ieff in table CPOI and is defined using neff values. It is assumed, that the efficiency of a certain pm is good enough describe, by multiplying this shape with a certain correction factor.