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Re: TPC dE/dx [message #11560 is a reply to message #11557] Tue, 08 March 2011 17:03 Go to previous messageGo to previous message
Felix Boehmer is currently offline  Felix Boehmer
Messages: 149
Registered: May 2007
Location: Munich
first-grade participant

From: *natpool.mwn.de
Hi Stefano,

very cool that you look into this!

Just some comments:
The cluster amplitude is defined after the FrontEnd and given in ADC channels! It is calculated from the analogue signal amplitude (on the pad) using some parameters: ADC_amp = Sig_amp /(adcmax/adcmaxcount) (See PndTpcFrontend).

You have to be very careful when defining the dx - a lot of effects are at work here (clustering!). The best approach is to use the actual track fit, as it is done in the task that I sent you a while ago


Cheers

Felix


 
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