Gain Matching

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To easily gain-match, you can use the TGainMatch class. A separate TGainMatch is created for each channel. You can create a TGainMatch by invoking:

TGainMatch *myGain = new TGainMatch; 

#Coarse Gains To effectively use TGainMatch, we need to make sure the gains for each channel are set roughly to the correct value. If this isn't already the case, you can use the CoarseMatch method of TGainMatch. This method works best on sources with two very strong transitions such as 60Co. To gain match a specific channel, use:

   myGain->CoarseMatch(histogram,channel_number,low_energy,high_energy);

where histogram is the TH1* to gain match, channel_number is used if you want to gain match a specific channel, low_energy is the lowest energy peak to gain match, and high_energy is the highest energy peak to gain match. low_energy and high_energy are defaulted to the 60Co values.

Once the gain-matching is complete, the energy coefficients can be written to the TChannel,

myGain->WriteToChannel();

and the TChannels can all be written to a cal file using the normal TChannel::WriteCalFile("name_of_cal.cal")

###Using CalManager You can add TGainMatch instances to a TCalManager