1. Magnet Safety System for NA61/Shine
Sylvain Ravat
On Behalf of EP/DT-DI

2. NA61/Shine collaboration meeting - 19/09/2016
Introduction
To protect VERTEX1&2, EP/DT-DI has been asked to replace the former quench detection system by MSS2 (Magnet Safety System 2).
MSS2 is an upgrade of the safety system which protects LHC experiments.
Based on proven National Instruments technology already used in the LHC collimators, Totem and ALFA position safety and interlock systems
Already used on several magnets:
COMPASS and M1 at Prevessin Site
LHCb Dipole
ALICE Dipole and Solenoid
Atlas Central Solenoid
Foreseen installations during EYETS 2016/2017:
Atlas Toroids
CMS Solenoid
NA61/Shine collaboration meeting - 19/09/2016

3. MSS2 System Architecture Overview (1)
HOST COMPUTER
(annunciator + MDS)
RT controller
FPGA
Ethernet (TN)
DMA
MSS2 CORE is cRIO which is autonomous
Host PC provides an interface to MSS2, but it is not directly involved in magnet security
C modules
AI, DI, DO
I/O’s
NA61/Shine collaboration meeting - 19/09/2016

4. MSS2 System Architecture Overview (2)
FPGA CORE Design :
Parallel Acquisition loops for AI’s (period=200us) and DI’s (period=200us)
Analog Processing : LO and HI alarms handling + Low pass Filter for each channel
StateChart which determine MSS2 state -> IDLE, Slow Dump, Fast Dump
DO’s generation based on logical equations implying MSS2 state, DI’s, Alarms...
T = 200us
T = 200us
Design is made to be very flexible regarding amount of I/O’s and States handling in order to provide generic safety system
NA61/Shine collaboration meeting - 19/09/2016

5. NA61/Shine collaboration meeting - 19/09/2016
MSS2 Typical Rack
VAC
receives and treats analog signals and sends results to MAC Crate
CompactRIO
IO Cards
MAC
receives digital and analog signals , cRIO FGPA will combine these signals and take actions to protect the magnets
APC
sends FPGA orders to dependent system such as magnet power supply, cryogenic plant…
MAC Crate
NA61/Shine collaboration meeting - 19/09/2016

6. MSS2 electronic cards Analog Input Card used in VAC crate
Digital Input Card used in
MAC crate
NA61/Shine collaboration meeting - 19/09/2016

7. NA61/Shine collaboration meeting - 19/09/2016
MSS2 tools
Annunciator
A tool to find the causes of an abnormal magnet stop,
Records MSS events at a rate of 5kHz,
A User Interface accessible from WINCCOA SCADA system.
Magnet Diagnostic System
A tool to monitor all analog signals read by MSS2,
Acquisition of a maximum of 80 analog signals at a rate of 5kHz,
Make a post mortem file corresponding to 30s before and 5mn after a quench event,
Archive and display analog signals at a rate of 1Hz.
NA61/Shine collaboration meeting - 19/09/2016

8. Vertex 1&2 Protection signals
MSS2 configuration by Magnet:
1 SQD, 1 Temperature TVO type and 1 Voltage for each current lead
3 joint voltage measurements
3 bridges ( combination of 2 voltages for each)
1 DCCT copy from power supply rack
2 Digital Output signal for FAST dump
Current leads
VCL
VCL
SQD
SQD
TVO
TVO
Joints
Top Coil
Bottom Coil 1 1
3/7
4/7
Bridges
3/7
4/7
MSS2 signals for VERTEX 1&2
NA61/Shine collaboration meeting - 19/09/2016

9. Hardware Installation
NA61 Ctrl Room
Cryogenic zone
Voltages
VERTEX 1
VERTEX 2
Temperatures + SQD
Quench signal to Cryo
NA61/Shine collaboration meeting - 19/09/2016

10. WINCCOA User Interfaces : Annunciator
Records events with 200 us resolution.
Online, direct analysis.
Possibility to analyze older events with offline mode.
MCS WINCCOA
Dataserver
OPCUA Client
OWS TN
MSS2 MAC Crate
Publish MSS2 events via an OPCUA server
NA61/Shine collaboration meeting - 19/09/2016

11. WINCCOA User Interfaces : MDS
Inside MSS2 cRIO controller.
Slow Acquisition at 33 Hz.
Fast Acquisition file at 5kHz.
WINCCOA
Database
WINCCOA
Dataserver
OCPUA Client
OWS TN
MSS2 MAC Crate
Publish Analog measurements via an OPCUA server.
NA61/Shine collaboration meeting - 19/09/2016

12. NA61/Shine collaboration meeting - 19/09/2016
Conclusion
MSS2 is working from the beginning of July 2016.
Transfer WINCCOA Application from local Windows PC in NA61 Control Room to a Linux Dataserver in CCC.
EPICS server to communicate with EPICS client of NA61 DCS
Test on technical network with Argonne EPICS Client on several machines.
NA61/Shine collaboration meeting - 19/09/2016