# Dead time calculation

From Hall A Wiki

The dead time is computed in end of run script

and in the ~a-onl/scaler/dtime scdtime.c for online dead time calculation

I put this formula in the deadtime calculation

- Dead time calculation
- Correlation between trigger ( April 6 2007 ) A. Camsonne
- T1 =S1S2
- T2 =S1 or S2 all T1 are are in T2
- T3 =S1S2
- T4 =S1C or S2C
- T5 = T1T3 all T5 are T1 and T3
- T6 = T3T2 all T6 are T3 and T2
- T7 = T1T4 all T7 are T1 and T4

- evert T7 is s T1

- Expected number of triggers = (T1-T5-T7)/ps1+(T2-2T1-T6)/ps2+(T3-T5-T6)/ps3+(T4-T7)/ps4+T5/ps5+T6/ps6+T7/ps7+T8/ps8

foreach t $scalerinfo(triglist) {

set tcorr 0

set nt($t,$h) $map(trigger-$t,$h)

if { $t == 1 } { set tcorr $t5corr+$t7corr

}

if { $t == 2 } { set tcorr $t6corr+2*$t1corr

}

if { $t == 3 } {

set tcorr [ expr $t5corr + $t6corr ] } if { $t == 4 } {

set tcorr [ expr $t7corr ]

}