EPICS Environment atJ-PARC Neutrino Facility
K. Nakayoshi, K. Sakashita, T. Nakadairafor J-PARC Neutrino Facility
2017/05/16

Spring 2017 EPICS collaboration meeting @KURRI

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J-PARC

Japan Proton Accelerator Research Complex

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T2K (Tokai to Kamioka) Experiment
A long-baseline neutrino oscillation experiment at J-PARC

295 KmSK@Kamioka

J-PARC@Tokai• T2K has been taking physics data from Jan. 2010.
• In July 2013, muon ν to electron ν transformation has been established.
• Now T2K is searching for CP symmetry violation in neutrino
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Spring 2017 EPICS collaboration meeting @KURRI

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Neutrino Facility at J-PARC
NearNeutrino
Detectors

Muon
Monitors

Beam
Dump

ND280

Decay
Volume

Beam
Dump
µn
295km
To Kamioka

TargetHorns
TargetStationp

280m110m
280m- Stable operation at 470kW is achieved- 2.2x1014ppp@30GeV, 2.48s rep.

Extraction
Point- Future upgrade toward 1.3MW is planned

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Spring 2017 EPICS collaboration meeting @KURRI

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Neutrino Facility at J-PARC

beam-loss, profile

Normal-Conducting
Magnets- 420kW (2x1014ppp@30GeV, 2.48s rep.)- about 1MJ/pulse

750kW, ~1Hz
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Contents• Introduction of beamline control at NU– Requirements for the beamline control– Features of beamline control at NU• Applications examples of EPICS at NU– Magnet PS control and interlock system– Archivers, GUI panels• Development of the beamline expert system• Summary
NU: Neutrino Facility

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Spring 2017 EPICS collaboration meeting @KURRI

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INTRODUCTION OF BEAMLINECONTROL AT NEUTRINO FACILITY
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Spring 2017 EPICS collaboration meeting@KURRI

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Requirements for the Beamline
Operation at NU• One mistaken shot can potentially do serious damage tothe beamline equipment.
• Information sharing about beam status between theaccelerators and Neutrino facility is essential for safety
operationWe utilize EPICS for beamline control/monitoring

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Spring 2017 EPICS collaboration meeting @KURRI

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Features of Beamline Control at NU
Interlock of NC
Magnets

A variety of devices are controlled/monitored
by EPICS framework
Normal-Conducting
Magnets

APPLICATION EXAMPLES OF
EPICS AT NEUTRINO FACILITY
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Spring 2017 EPICS collaboration meeting@KURRI

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EPICS IOC Environment at NU
We adopted micro servers “Saba-taro” for EPICS IOC in place ofcommodity PCs. It had been initially R&D’d and used successfully at MR.

OSScientific Linux 6.8, x86_64

EPICS version

3.14.12# of IOCs

22

Total # of CHs~13000IOC platform

Micro server (Celeron J1900,Mem:8GB)

Old IOCs

A micro server IOC
2 IOCs

6 IOCs7 IOCs

1 IOC

6 IOCsIOCs at Target Station

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Spring 2017 EPICS collaboration meeting @KURRI

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Slow Control Framework at NU• Slow control/monitor is based on PLC + EPICS– Yokogawa FA-M3 PLC + netDev (device/driversupport )– Common scheme with J-PARC MR• Application examples at NU– Magnet Power supply control system– Interlock system for NC magnet PSs

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Spring 2017 EPICS collaboration meeting @KURRI

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Magnet Power Supply Control
Various type of magnet power supplies arecontrolled by PLC/EPICS

21 NC Power supplies

2 HORN Power supplies

A SC Power supply# of Magnets# of PSs (PLCs)# of IOCs

HORN

32 (2)

1SC

28

1 (1)

1SC collector

66 (1)

1NC

2121 (21)2Magnets and its power supplies controlled by PLC/EPICS
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Spring 2017 EPICS collaboration meeting @KURRI

A NC Power supply and PLC
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Interlock System for NC Magnet
Power Supplies
An interlock system for current change of NC PSs by panel meters (comparator)
The panel meters are controlled by PLC+EPICS
NC PS (x 21)
HI/LO Status

DCCT Output

MPS

RS485

DPMs

PLC

Network

Curr.
Thr.Setting
Setting
HI/LO/Thr.

GUI
EPICS IOC

PLC and digital panel-meters
for Interlock of NC magnet PS

We have developed the interlock system in 2012. From 2012 to 2013,
we caught 3 failures by this system. In 2014 we replaced all the PSs for
NC magnets. After the replacement, we caught no failures so far.
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Spring 2017 EPICS collaboration meeting @KURRI

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Channel Archiver• We use Channel Archiver and Archive Viewer• Archived data size is increasing year by year
• Watching and examining next-generation archiver– Any suggestion? Archiver Appliance?

OSEPICS ver.

Scientific Linux 6.4, x86_64
3.14.11# of Servers

2 (DELL PE T620, T630)# of engines

27

GByte

Archived data size for each year

4000
3670

3000
2633

2000

1981
1605

1000
0
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3869

150374607

2009 2010 2011 2012 2013 2014 2015 2016

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GUI, Panels• Online monitoring display for beamline shift– we use root, EDM and CaPython for GUI– Any suggestion? CSS?

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Spring 2017 EPICS collaboration meeting @KURRI

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DEVELOPMENT OF THE BEAMLINE
EXPERT SYSTEM
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Spring 2017 EPICS collaboration meeting@KURRI

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Development of the beamline
expert system
EPICS Records
Beamline
Interlocks
Beamline
devicesRadiation
monitors

CA

Interlock patternsof past MPSs
Inferenceenginefault recovery
methodKnowledge-BaseBeamline Shifter•The system acquires EPICS records of beamline status every 1 sec.
– usual case: Watches the beamline status to detect a signs of anomalies in equipment– Interlock case: Shows details of interlock and recovery method for beamline shifter

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Spring 2017 EPICS collaboration meeting @KURRI

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Development of the beamline
expert system (Contd.)• Current status– We investigated the past interlock pattern andimportant interlock pattern was picked up.
– We developed a CA client for the data input part.
– Now we are evaluating a inference part using thepast interlock pattern.

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Spring 2017 EPICS collaboration meeting @KURRI

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Summary• EPICS environment at J-PARC neutrino facility wasintroduced. EPICS framework is essential for highintensity beam operation at neutrino facility.
• In neutrino facility a typical configuration for thecontrol system is combination of PLC and EPICS.
As actual examples, the magnet PS control andinterlock systems were introduced.
• We are developing a beamline expert system forthe safety and stable beam operation.
We are grateful for EPICS community,
especially MR control group of J-PARC
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Spring 2017 EPICS collaboration meeting @KURRI

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Backup Slides

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Spring 2017 EPICS collaboration meeting @KURRI

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