Data structure (mbsrun/nrfexp/prod11)

The data are written using the MBS data acquisition framework provided by GSI.

Data are distinguished by the trigger number:

Trigger number Action
2 Listmode readout for HPGe events with majority>1, detectors 1,2,3
HPGe 4 is left out for annihilation events
4 Scaler and OPC data from accelerator control (every 5 seconds)
8 Histogram and scaler data (every 600 s)
14 Start data acquisition trigger
15 Stop data acquisition trigger 
Data structure event 2
Data word (16 bit) Item
0-19 Event header
20-23 time stamp (sec, µsec)
24-27 BaF1-BaF4 time
28-31 HPGe1-HPGe4 energy
32-35 BaF1-BaF4 energy
Data structure event 4
Data word (16 bit) Item
0-19 Event header
20-23 time stamp (sec, µsec)
24-25 no. of OPC data following (111)
26-237 OPC data (value, time stamp low, time stamp high)
238-270 Scaler data (HPGe1-4, ACS1-4, BaF1-Baf4, CLBI, CLAI)
Data structure event 8
Data word (16 bit) Item
0-19 Event header
20-23 time stamp (sec, µsec)
24-131094 Histogram data HPGe1-4 (8x65535)
131095-196631 Histogram data Sili1-4 (8x8192)
Data structure event 14
Data word (16 bit) Item
0-19 Event header
20-23 time stamp (sec, µsec)
Data structure event 15
Data word (16 bit) Item
0-19 Event header
20-23 time stamp (sec, µsec)
24-131094 Histogram data HPGe1-4 (8x65535)
131095-196631 Histogram data Sili1-4 (8x8192)
196632-196663 Scaler data (HPGe1-4, ACS1-4, BaF1-Baf4, CLBI, CLAI)