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EVIO Data Format

Table of Contents
minLevel2

Overview

EVIO (Event IO) is the raw data format used by the DAQ event builder.  The structure of an EVIO file is a tree of banks, each of which has a header and a data payload. 

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Parent banktagtag hexNameNotes
event type 17170x11PrestartOnly bank in pre-start event
event type 18180x12GoOnly bank in go event
event type 311290x81EpicsEpics mother bank
|-576180xe112Epics headerEpics header bank
|-576200xe114Epics stringEpics string bank - contains the epics data in one long string of value-key pairs.
 576210xe115ScalersScaler banks
  0xe101  
Physics event>128bit 7 setPhysics 
|-491520xc000Event ID 
|-37,39,46,580x25,0x27,0x2e,0x3a 

 

Crate NameContentsTagTag Hex
hps11SSP, ECal Bottom Disc/TDCs/Scalers, RF FADC460x2e
hps12ECal Top & RF Disc/TDCs/Scalers580x3a

hps1

ECal Top FADC37

0x25

hps2ECal Bottom FADC, Faraday Cup Disc/Scalers390x27

Prestart Bank

IndexPrestart bank0x11 (17)
0start timeunix timestamp
1run number 
2file number 

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