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Realisation of the interlocking between SPS, LHC and CNGS and open issues

BBeam eam IInterlock nterlock SSystemsystems

Bruno Puccio AB/COBruno Puccio AB/CO

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LHC Beam Interlock System: the function

The (main) User Systems are:

Access Safety system

Beam Loss Monitors

Beam Excursion Monitors

Beam Aperture Kicker

Beam Energy Meter

Beam Dumping system

Collimation system

CCC (Operator button)

Experiments

BIS

User ‘Permit’ Signals

Kicker System

Fast Beam Current Decay Monitors

Fast Magnet Current change Monitors

Powering Interlock system

R.F. system

Transverse Damper

Vacuum system

Warm Magnets Interlock system

dump Both-Beam

dump Beam-1 dump Beam-2

>100 connections with the different User Systems distributed over 28kms

LHC has 2 Beamssome User Systems give simultaneous permit

Others give independent permit

Beam ‘Permit’

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LHC BIS: the Main Features

Designed to be Safe, Fast, and Deterministic.

Redundancy throughout: User Systems BIS Kicker system

Simplicity for crucial process Effort on monitoring and maintainability.

Designed for the LHC and deployed in the SPS ring, the SPS Transfer Lines, and the LHC Injection regions.

Generic solution with unique Hardware.

The BIS is a distributed system composed of :

– Beam Interlock Controllers

– User Interfaces: name of individual and distant interface units installed ‘close’

to the interlocks sources.

The BIS manages Beam-1 / Beam-2 independently.

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User Interfaces & BIC as a generic solution

up to 1200 metersBeam Permit Loops

VME CRATEVME CRATE

UserPermit #1

#3

UserPermit

UserPermit #2

…up to 14 User Interfaces

Ethernet

User Interfaces (installed in User’s rack)

Test &Monitoring

Module

Pat

chin

g

Coremodule F.O.

interface

Safe Beam Param.

(via Timing)

Safe Beam Flag

SafeBeam

ParameterReceiver

+ Beam Interlock Controller

copper cable

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LHC Beam Permit Loops

10MHz Square wave generated at IR6: Signal can be cut by any Controller Signal can be monitored by any Controller

When any of the four 10MHz signals are absent at IP6, BEAM DUMP!

4 fibre-optic channels from Point 61 clockwise &

1 anticlockwise for each Beam

Beam Dump Beam-1 and Beam-2Beam Interlock Controllers (BIC)

16 BICs- Two at each Insertion Point

Up to 14 User Systems per BIC: 6 x Beam-1 / Beam-2 8 x Both-Beam

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Beam Interlock Controller (BIC)

The BIC collects the User Permit (interlock) signals and provides an output signal

corresponding to the logical AND of all inputs.

Each BIC has 14 HW inputs :7 non-maskable inputs: Always active !!

3 inputs for User System permitting Beam-1 or Beam-2

4 inputs for User System permitting Both-Beam

7 maskable inputs: Masking taken into account until “Safe Beam Flag = True” 3 inputs for User System permitting Beam-1 or Beam-2

4 inputs for User System permitting Both-Beam

There is a 15th input (aka the software input): used by the Software Interlock System

BIC has an internal history buffer : all I/O transitions are logged and time-stamped to the s.

Cost:

20k CHF for [ VME crate + redundant P.S. + CPU LynxOS ]

6k CHF for the BIC cards set.

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BIC

LHC BIC has a fixed Partition:

Maskable / NOT Maskable & Independent / Simultaneous Permit

BICBEAM1_PERMIT

BEAM2_PERMIT

USER_PERMIT SIGNALS

NO

T-M

AS

K.

INP

UT

SM

AS

KA

BL

E

INP

UT

S

MaskSettings

Safe Beam Flags

USER SYSTEM #1

USER SYSTEM #2

USER SYSTEM #3

USER SYSTEM #4

USER SYSTEM #5

USER SYSTEM #6

USER SYSTEM #7

USER SYSTEM #8

USER SYSTEM #9

USER SYSTEM #10

USER SYSTEM #11

USER SYSTEM #12

USER SYSTEM #13

USER SYSTEM #14

MASKABLE&

Independent Permit

MASKABLE&

Simultaneous Permit

NOT MASKABLE

& Independent Permit

NOT MASKABLE

& Simultaneous

Permit

User Interfaces

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Beam Interlock Controller Installation List

BIC Name Location Rack

CIBC.L1 US15 CYCIB01

CIBC.R1 US15 CYCIB02

CIBC.L2 UA23 CYCIB01

CIBC.R2 UA27 CYCIB01

CIBC.U3 UJ33 CYCIB01

CIBC.S3 SR3 YYACS01=SR3

CIBC.L4 UA43 CYCIB01

CIBC.R4 UA47 CYCIB01

CIBC.L5 USC55 CYCIB01

CIBC.R5 UJ56 CYCIB01

CIBC.L6 US63 CYCIB01

CIBC.R6 US67 CYCIB01

CIBC.U7 TZ76 CYCIB01

CIBC.S7 SR7 YYACS01=SR7

CIBC.L8 UA83 CYCIB01

CIBC.R8 UA87 CYCIB01

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LHC User Systems Listing

User System

BIC

L1

BIC

R1

BIC

L2

BIC

R2

BIC

U3

BIC

S3

BIC

L4

BIC

R4

BIC

L5

BIC

R5

BIC

L6

BIC

R6

BIC

U7

BIC

S7

BIC

L8

BIC

R8

Tot.

BLM (critical) 1 1 1 1 1 1 1 1 8

PIC (Essential) 1 1 1 1 1+1 1 1 1 1 1 1 1+1 1 1 16

WIC 1 1 1 1 1 1 1 7

Vacuum 1 1 1 1 1 1 1 1 1 1 1 1 12

LBDS 2 2 4

Experiments 1 1 1 1 1 1 1 1 8

Access 1 1

others… 1 1 2

BLM (less crit.) 1 1 1 1 1 1 1 1 8

PIC (Auxiliary) 1 1 1 1 1+1 1 1 1 1 1 1 1+1 1 1 16

Collimation 1? 1? 1? 1? 2? 1? 1? 1? 1? 2? 1? 1? 14

FMCM 1 1 1 1 1 5

R.F. 1 1 2

others… 1 1 2 1 1 6

Mas

kabl

eN

OT

Mas

kabl

e

Work in Progress

Work in Progress

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User Interface: pictures & connection drawing

An unique Hardware solution is provided for a connection with the BIS:

the User InterfaceFront view

Rear view

PCB

Front view

Two versions: User Permit for Beam-1 and User Permit for Beam-2

User Permit for Both Beams

This Hw unit is installed in the User’s rack.

Rear side drawing

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BIS Rack

User System

Permit ‘A’

Permit ‘B’

‘A’

‘B’

User System Rack

User InterfaceBeam Interlock

Controller

■ 19” rack mounted board. Height of 2U (~9cm).

■ fully redundant Power Supplies

■ using differential signals (RS422 standard) on copper cable up to 1.2km

The User Interface: main features

■ allows direct connection with many different types of hardware platform (PLC, VME, etc…)

■ takes the two USER_PERMIT signals and transmits them to the nearest BIC in a safe and reliable manner

■ Cost: 2k CHF for the User Interface unit + Connection cable expenditure 10 CHF/meter ( LHC average case = 2.5k CHF for 250 meters)

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‘B’

User System

Permit ‘A’

Permit ‘B’

‘A’ User InterfaceBeam Interlock

Controller

To be connected to the BIS: responsibilities & duties

The User Interfaces (and the BIC) have been designed to be SIL3

Hw within the panel can be tested and monitored at distance from the BIC

During Cold Checkout, it must be able to change (on request) the User_Permits from TRUE to FALSE

■ Documentation available on EDMS id 636589: “Technical Note for the USER INTERFACE to the BEAM INTERLOCK SYSTEM”

https://edms.cern.ch/file/636589/1.1/CIBU-User-Manual-1v1.doc

■ Caution must be taken in order to guarantee Beam Permits and to avoid False Beam Dumps

■ The User System must respect the connection rules & commissioning procedures: As for example: The 2 User_Permits should be HW wise separated

Border User System/BIS