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Current Status of The Control System for J-PARC Accelerator Complex

Hiroshi YOSHIKAWA

J-PARC Center at KEK/JAEA

October 16, 2007 ICALEPCS2007 at Knoxville

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Nuclear Transmutation

J-PARC Facility

J-PARC = Japan Proton Accelerator Research Complex

Joint Project between KEK and JAEA

3 GeV Synchrotron(25 Hz, 1MW)

Hadron Beam FacilityMaterials and Life Science

Experimental Facility

Neutrino to Kamiokande

50 GeV Synchrotron(0.75 MW)

500 m

Linac(330m)

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Location of J-PARC at Tokai

TOKYO

KEK

JAERI

NARITA

KAMIOKA

Tsukuba

Tokai1 hour

295 km JAEA

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Goals at J-PARC

Need to have high-powerproton beams

MW-class proton accelerator (current frontier is about 0.1 MW)

R&D toward Transmutation at 0.6 GeVNuclear & Particle Physics at 50 GeVMaterials & Life Sciences at 3 GeV

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Phase 1 and Phase 2

– Phase 1 + Phase 2 = 1,890 Oku Yen (= $1.89 billions if $1 = 100 Yen).

– Phase 1 = 1,527 Oku Yen (= $1.5 billions) for 〜 8 years.– JAEA: 860 Oku Yen (56%), KEK: 667 Oku Yen (44%).

JAEA Portion

KEK Portion

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J-PARC Control System

Protect from Radiation– Intelligent Beam Control

• Keep stability of electro-magnetic field• Keep minimum beam loss• Predict beam behavior

• System identification and definition of response function

• By link of operation and simulation• By link of operation and database

Integrated Operation Environment– Effective use of software technology

In the process of developing

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Function of Safety

Radiation Measurement System– Legal management of the area boundary

Personnel Protection System (PPS)– Make and keep the boundary condition of closed

space which is allowed existence of the beam– Stop the beam when the condition breaks

Machine Protection System (MPS)– Protect machine from high power beam

bombardment– Stop the beam when something is wrong

Computer Control System– Automatic correction, FB, FF– Suggest the optimum parameters

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PPS

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MPS

MPS hardware configuration. When the threshold is exceeded, the loss MPS hardware configuration. When the threshold is exceeded, the loss monitor module with only the analog circuit is fired.monitor module with only the analog circuit is fired.

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MPS

Fast beam stop Fast beam stop procedure using Machine Protection System (MPS)procedure using Machine Protection System (MPS)

1: The beam loss is detected by the loss monitor.1: The beam loss is detected by the loss monitor. 2: Loss signal transmission to the RFQ part using MPS.2: Loss signal transmission to the RFQ part using MPS. 3: RFQ3: RFQ 　　 powerpower 　　 off and Ion source injection timing removing.off and Ion source injection timing removing. 4: Insertion of the Beam stopper4: Insertion of the Beam stopper 5: Because MPS don't want to cool the RFQ, power is turned on again quickly.5: Because MPS don't want to cool the RFQ, power is turned on again quickly.

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NETWORK

Basic Composition Star Connection around CCR

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NETWORK

Standard protocol for redundancy can not make the performance that no connection loss when the pass way is switched.

We selected the protocol of the vender dependence.

For ease of physical fiber topology, we use the combination of ESRP and EAPS.

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NETWORK

ESRP test by single fault ESRP test by double fault

No matter appears when the power of switch is down, or when fiber is disconnected.

When the route revives, the connection doesn't become interrupted.

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NETWORK

EAPS test by single fault EAPS test by double fault

Time of route change < 1.2sec(including route reviving. Any TCP connection is not closed at this route change.)

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NETWORK

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TIMING SYSTEM

Receiving module

E/O-O/E Converter

Fanout

SEND IOC

RECEIVE IOC

RECEIVE IOC

RECEIVE IOC

RECEIVE IOC

Ether net

Reflective memory net

output

Clock, Trigger, TypeCode

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TIMING SYSTEM

Ch1 Ch2 ch3 ch4 vh5 ch6 ch7 h8

T1

T2

T3

T4

T5

T6T6

T7

T8

T9

T9

T10

・・・

・・・

Ch1 Ch2 ch3 ch4 vh5 ch6 ch7 h8

T1

T2

T3

T4

T5

T6T6

T7

T8

T9

T9

T10

・・・

・・・

LUT of a receiving moduleCh1 Ch2 ch3 ch4 vh5 ch6 ch7 h8

T1

T2

T3

T4

T5

T6T6

T7

T8

T9

T9

T10

・・・

・・・

T3

T3

T3

T5

T3

T3

T3

T3

T5

T3

T3

T3

T3

T3

T5

T3

T3

T3

Type train of sending module

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TIMING SYSTEM

Single Shot is generated for the initial commissioning– Effective to reduce activation

Type code means operation mode and beam course

Individual delay trimming can be done without stopping the beam– Two way of changing delay time.

Delay time changing of selected channels can be done simultaneously

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Data Acquisition

On the EPICS, fundamental data can be acquired.

High power beam handling required the traceable data of each shot, selected shot, event occurred shot.

Trade off of data size (resolution, repetition) with transport– Separate storing data and gathering data

Concept of Selecting Data– We need the data at the event.

• (around the event, before and after)

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Before & after data is transmitted to PC.

Pulse is Deformed

Record

Ring bufferRing buffer

Pulse shapeCheck

Abnormal wave-form recorder

LAN

・ 10MS/s or 200MS/s (2 types), 12bit(±10V), insulated each CH. ・ Ring buffer size: 192MB

wave-form (50pps)Surveillance functionSurveillance function

Data Acquisition

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Data Acquisition

WER WER

Event Data Collection Server

Monitoring Data Server

WER・・・WER

System Configuration

Trigger Counter

BPM4

BPM6

BPM9

CT

threshold

*WER: Wave Endless Recorder

Event (trigger number)

Event Data request

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GUI

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GUI

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GUI

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SUMMARY

Infrastructure of the J-PARC control system was completed.– Covered area will be extended to MR, MLF next year.

Fundamental function of PPS, MPS, TS and Data Acquisition are successfully established for the 1st stage of commissioning.

High Level Application is developed on the Integrated Operation Environment– IOE is written in java, and it’s API can merge several

simulation and other IOE tools