Henning Krueger
							7/28/97

Usage of the photon package in offline
======================================

adcgam_bk.inc -- the interesting include file
-------------

integer*4:
	nadcgam          : number of gammas defined

real*4:
	energy_adcgam(ladcgam,madcgam) : energy of gamma
	x_adcgam     (ladcgam,madcgam) : global x-coord 
	y_adcgam     (ladcgam,madcgam) : global y-coord 
	z_adcgam     (ladcgam,madcgam) : global z-coord 
	xc_adcgam    (ladcgam,madcgam) : centre of gravity x-coord 
	yc_adcgam    (ladcgam,madcgam) : centre of gravity y-coord 
	chi2_adcgam  (ladcgam,madcgam) : chi2 of shower distribution

integer*4:
 	npht_adcgam  (ladcgam,madcgam) : photon detector number
     	type_adcgam  (ladcgam,madcgam) : type(hit place) of the gamma
					= 1 : hole
					= 2 : boundary 
					= 3 : boundary
					= 4 : boundary/edge
					= 5 : ?
					= 6 : boundary
     	dime_adcgam  (ladcgam,madcgam) : number of counters in the gamma
     	id_adcgam    (ladcgam,madcgam) : identification number from trkmatch
					= 1 : gamma
					= 2 : electron
					= 4 : neutral hadron
					= 6 : MIP, maybe muon
					= 8 : Hadron
    	status_adcgam(ladcgam,madcgam) : status  number 
					= 0 : not valid
					= 4 : O.K.
     	clus_adcgam  (ladcgam,madcgam) : link to cluster table (not used)
     	ltrk_adcgam  (ladcgam,madcgam) : link to track number 
    	ltseg_adcgam (ladcgam,madcgam) : link to segment number 



Switches
--------
        pht        : turn on M1/M2/M3 photon processing
        m1_pht     : turn on all M1/M2/M3 photon processing and M1 "full"
        m2_pht     : turn on all M1/M2/M3 photon processing and M2 "full"
        m3_pht     : turn on all M1/M2/M3 photon processing and M3 "full"
        full       : turn on a complex (GAMS) photon cluster algorithm (V.K.)
        clust      : turn on a simple cluster algorithm (V.V.)
        peak       : turn on a simple peak finding cluster algorithm (V.V.)
        gamma      : print gammas (presently dummy?) 
        hist       : turn on histograms
        clb        : use calibration run
        led        : use LED calibration
        las        : use laser calibration

Cuts
----
	min_count  : minimum ADC count
	min_energy : minimum energy in gamma
	max_chi2   : maximum allowed chi2 of gamma


Example cmd file
----------------

set on  unpack    adc
set on  photon    full m1_pht m2_pht m3_pht led
set cut photon    min_count  5.
set cut photon    min_energy 2.