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5.4.1
Taggers
By t a g g e r s, we denote detectors that detect the presence of
any kind of detectable stable particle, charged or neutral, and
also has some proportionality between signal and incoming energy.
Hence, they should be described analogously to modular calorimeters
(with a bad energy resolution), sensitive to minimum ionising particles.
If the taggers are sensitive to electrons and photons, and sees
muons and charged hadrons as minimum ionising particles, the detector
type should be set to 'electro-magnetic', if it also detects neutral
hadrons it should be set to 'combined'.
Internally, SGV treats taggers as calorimeters, and the data from them
will be in the shower-part at the particle information common-block.
In the analysis code, the taggers can be used by looking for the
existence of a signal in them. The shower start-point will be at
the center of the hit module, and can easily be modified to a module
number. If shower clustering was done, one is assured that there will
only be one cluster per tagger module, even if several tracks went
through the same one. Care should be taken that the measured momentum
etc. of particles only detected by a tagger is not used for total energy
calculation, and the like.
Next: 5.4.2 Scintilators
Up: 5.4 Other types of
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Mikael Berggren
2003-03-27