October 2010 ntuple structure
- For each run, there are 2 ntuples: pedestal_runXXXX.root (containing pedestal data) and datafile_runXXXX.root (containting physics data)

- the latest ntuples can be found on pcdream.cern.ch in the folder:
/mnt/wd/working_bak/ntuple/

- some example macro to read Oscilloscope and DRS data can be found here

- Channel mapping has changed during the test beam PLEASE REFER TO THE LOGBOOK FOR CHANNEL MAPPING a scan of the logbook is available here

- Depending on the run setup, the ADCs cabling may change. A scheme of the readout is here.

Note for the analysers

There has been a big improvement with respect to the old ntuples: now channels are stored in the arrays in the correct order so that (for instance) CHARGEADCN0[6] always contains the the charge of the 6th channel of ADC0 and you do not need to check CHADCN0[6].
The variable CHADCN0[] is still there so you old macro will keep working, but you can write your new macro without using it.
 Tree: DREAM
type (*)
name
Meaning
Comment
i
 Nrunnumber run number
i TimeEvs Time of event in Seconds
i TimeEvu  Time of event in MicroSecond 
(elapsed time = TimeEvs + TimeEvu)
i Nevtda Number of data event
i
 CHSCA[16]
 Channels in Scaler
CHSCA[i]=0  Spill Count
CHSCA[i]=1  Physics Trigger Count
CHSCA[i]=2  Pedestal Trigger Count
CHSCA[i]=3  Event Count
CHSCA[i]=4  Cleared Event Count
i
 COUNTSCA[16]
 Count in Scaler Channels
B
 DATAOSC[2128] value of the sampled point (the number of points per channel is stored in PTSOSC)  the size of this array has changed since 2009 to account for two additional osc channels
B
 DATAOSC_CH[4][532] value of the sampled point DATAOSC_CH[ch][sample] new array divided per channel
i CHFOSC[4] Channel Flag
 (1 = channel enabled   0=  disabled) 
I POSOSC[4] Position for Oscilloscope Channels
(millidiv)
F
 PED_MEAN_OSC[4]
 Pedestal Mean Value of the sampled points
 Filled field only for physics runs
F
 PED_RMS_OSC[4]
 RMS Mean Value of the sampled points
 Filled field only for physics runs
i SCALEOSC[4] Scale of the Oscilloscope Channels
(mV/div)
i TDOSC[4] Time Diff for Oscilloscope Channels   (currently empty)
i PTSOSC Oscilloscope points
(usually 282 or 532) 
i SROSC Sampling rate of the Oscilloscope (Hz)
F
 DATADRS[2][9][1024]
 value of sample point DATADRS[group][channel][sample] DRS data is corrected using the CAEN provided routins and corrections
F
 INTDRS[2][9]
 integral of the DRS signal INTDRS[group][channel]
F
 PED_MEAN_DRS[2][9]
 Pedestal Mean Value of the sampled points
F
 PED_RMS_DRS[2][9]
 RMS Mean Value of the sampled points
i CHADCN0[32] Channels in ADCN0   (32 Chs: 0 ..31)
i CHARGEADCN0[32] Charge in ADCN0 Channels
(ADC counts)
b
 OVERADCN0[32] Overflow bit in ADCN0
b
 UNDERADCN0[32] Underflow bit in ADCN0
F
 PED_MEAN_ADCN0[32]
 Pedestal Mean Value in ADCN0 Channels
(ADC counts)
 PED_MEAN_ADCN0[0] Ped Mean Value for Ch0
....
PED_MEAN_ADCN0[31] Ped Mean Value for Ch31
Filled Field only for physics runs
F
 PED_RMS_ADCN0[32]
 Pedestal RMS Value in ADCN0 Channels

 RMS_MEAN_ADCN0[0] Ped RMS Value for Ch0
....
RMS_MEAN_ADCN0[31] Ped RMS Value for Ch31
Filled Field only for physics runs
i CHADCN1[32] Channels in ADCN1 (V792AC module 1)
(32 Chs: 0 ..31) - 
i CHARGEADCN1[32] Charge in ADCN1 Channels
(ADC counts)
b
 OVERADCN1[32] Over bit in ADCN1
b
 UNDERADCN1[32] Under bit in ADCN1
F
 PED_MEAN_ADCN1[32]
 Pedestal MEAN Value in ADCN1 Channels
(ADC counts)
 PED_MEAN_ADCN1[0] Ped Mean Value for Ch0
....
PED_MEAN_ADCN1[31] Ped Mean Value for Ch31
Filled Field only for physics runs
F
 PED_RMS_ADCN1[32]
 Pedestal RMS Value in ADCN1 Channels
(ADC counts)
 PED_RMS_ADCN1[0] Ped RMS Value for Ch0
....
PED_RMS_ADCN1[31] Ped RMS Value for Ch31
Filled Field only for physics runs
i
 CHADCN2[32] Channels in ADCN2 (V792AC module 1)
(32 Chs: 0 ..31) -
i
 CHARGEADCN2[32] Charge in ADCN2
Channels
(ADC counts)
b
 OVERADCN2[32] Over bit in ADCN2
b
 UNDERADCN2[32] Under bit in ADCN2
F
 PED_MEAN_ADCN2[32] Pedestal MEAN Value in
ADCN2 Channels
(ADC counts)
F
 PED_RMS_ADCN2[32] Pedestal RMS Value in
ADCN2 Channels
(ADC counts)
i CHADCN3[32] Channels in ADCN3 (V792AC module 3)
(32 Chs: 0 ..31) - 
i CHARGEADCN3[32] Charge in ADCN3 Channels
(ADC counts)
b
 OVERADCN3[32] Over bit in ADCN3
b
 UNDERADCN3[32] Under bit in ADCN3
F
 PED_MEAN_ADCN3[32]
 Pedestal MEAN Value in ADCN3 Channels
(ADC counts)
 PED_MEAN_ADCN3[0] Ped Mean Value for Ch0
....
PED_MEAN_ADCN3[31] Ped Mean Value for Ch31
Filled Field only for physics runs
F
 PED_RMS_ADCN3[32]
 Pedestal RMS Value in ADCN3 Channels
(ADC counts)
 PED_RMS_ADCN3[0] Ped RMS Value for Ch0
....
PED_RMS_ADCN3[31] Ped RMS Value for Ch31
Filled Field only for physics runs
i CHTDC[64] TDC Channel corresponding to the count
(16 Channels : 0...15)  		CHTDC[i]=0  UpStream DWC time Left
CHTDC[i]=1  UpStream DWC time Rigth
CHTDC[i]=2  UpStream DWC time Up
CHTDC[i]=3  UpStream DWC time Down 
i COUNTTDC[64] Counts in TDC Channels  
i VALIDTDC[64] 0=good count 1=corrupt count
i EDGETDC[64] Edge in TDC (0=falling 1=rising)
i
 N_X
 Number of X Coordinates in
UpStream DWC
 Max value for N_X is 1
F
 X[16]
 X Coordinates in UpStream DWC (arbitrary units)
i
 N_Y
 Number of Y Coordinates in
UpStream DWC
Max value for N_Y is 1
F
 Y[16]
 Y Coordinates in UpStream DWC (arbitrary units)
i
 N_X_OPT
 Number of X Coordinates in
 DWC
 not present in 2010
F
 X_OPT[16] X Coordinates in  DWC (mm) not present in 2010
i N_Y_OPT Number of Y Coordinates in
 DWC		 not present in 2010
F Y_OPT[16] Y Coordinates in  DWC (mm) not present in 2010
NOTES:

(*)  Types:
  I    :   a 32  bit signed integer (Int_t)
  i     :  a 32  bit unsigned integer (UInt_t)
  F   :  a 32  bit  floating point (Float_t)
  B   :  a  8   bit signed integer (Char_t)
  s    :  a 16 bit unsigned integer (UShort_t)
  S    : a 16 bit signed integer  (Short_t)
  b   : a 8 bit unsigned integer (UChar_t)

Michele Cascella