1. CRU Weekly Meeting Discussion on Trigger
CRU INDIA TEAM
6th May 2015

2. Frame Length = 100 ms (TPC drift Time)
Trigger System
Triggered Detectors
Continuous Readout Detectors
Header
Payload
Time
Physics Trigger
Frame Length = 100 ms (TPC drift Time)
Header
Payload
Time
Heartbeat Trigger
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3. Trigger and Timing Distribution Schema
CRU INDIA TEAM

4. Data Format LTU-CRU 188 bits / each BC CRU INDIA TEAM Event Type
Event ID
(ORBIT 32 bit)
(BCId 12 bit)
Input Mask
(48 bit)
Message/Spare
(64 bit)
Detector Mask
(24 bit)
188 bits / each BC
CRU INDIA TEAM

5. Data Format CRU-FE Detectors with FPGA Detectors without FPGA 80 bits
Event Type
(8 bit)
Event ID
(ORBIT 32 bit)
(BCId 12 bit)
Message/Spare
(28 bits)
80 bits
Detectors without FPGA
Event Type
(8 bit)
Event ID
(ORBIT 32 bit)
40 bits
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6. Trigger Signals / IDs Heartbeat Signal Bunch crossing Counter
Orbit Counter
Trigger Counter
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7. Trigger Distribution Channel
LTU-CRU: PON/TFC
CTP-Detector and Detector-CRU: GBT
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8. Few Questions Is Trailer required, for any error correction mechanism?
Did we missed out in any signals/IDs?
Header
Payload
Trailer
CRU INDIA TEAM