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

Realisation of the interlocking between SPS, LHC and CNGS and open issues. B eam I nterlock S ystems Bruno Puccio AB/CO. LHC B eam I nterlock S ystem: the function. Beam ‘Permit’. BIS. Kicker System. dump Both-Beam. LHC has 2 Beams some User Systems give simultaneous permit

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

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  1. Realisation of the interlocking between SPS, LHC and CNGS and open issues Beam Interlock Systems Bruno Puccio AB/CO

  2. LHC Beam Interlock System: the function Beam ‘Permit’ BIS Kicker System dump Both-Beam LHC has 2 Beams some User Systems give simultaneous permit Others give independent permit dump Beam-1 dump Beam-2 >100 connections with the different User Systems distributed over 28kms

  3. 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-2independently.

  4. User Interfaces & BIC as a generic solution User Permit User Permit User Permit #2 up to 1200 meters VME CRATE Ethernet …up to 14 User Interfaces + User Interfaces (installed in User’s rack) Beam Interlock Controller #1 Safe Beam Parameter Receiver Safe Beam Param. (via Timing) Test & Monitoring Module coppercable Patching #3 Safe Beam Flag Core module Beam Permit Loops F.O. interface

  5. LHC Beam Permit Loops Beam Dump Beam-1andBeam-2 Beam Interlock Controllers (BIC) 16 BICs -Two at each Insertion Point Up to14 User Systems per BIC: 6 x Beam-1 /Beam-2 8 x Both-Beam 4 fibre-optic channels from Point 6 1 clockwise & 1 anticlockwise for each Beam • 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!

  6. Beam Interlock Controller (BIC) • The BIC collects theUser 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 orBeam-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 orBeam-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 ms. • Cost: •  20k CHF for [ VME crate + redundant P.S. + CPU LynxOS ] •  6k CHF for the BIC cards set.

  7. LHC BIC has a fixed Partition:Maskable /NOT Maskable & Independent /Simultaneous Permit User Interfaces USER SYSTEM #1 NOT MASKABLE & Independent Permit USER_PERMIT SIGNALS USER SYSTEM #2 USER SYSTEM #3 USER SYSTEM #4 NOT MASKABLE & Simultaneous Permit USER SYSTEM #5 NOT-MASK. INPUTS USER SYSTEM #6 BEAM2_PERMIT USER SYSTEM #7 BIC BEAM1_PERMIT BIC USER SYSTEM #8 MASKABLE & Independent Permit MASKABLE INPUTS USER SYSTEM #9 USER SYSTEM #10 USER SYSTEM #11 MASKABLE & Simultaneous Permit USER SYSTEM #12 Mask Settings Safe Beam Flags USER SYSTEM #13 USER SYSTEM #14

  8. Beam Interlock Controller Installation List

  9. LHC User Systems Listing NOT Maskable Maskable Work in Progress

  10. User Interface: pictures & connection drawing • An unique Hardware solution is provided for a connection with the BIS: the User Interface Front view PCB Front view • Two versions: • User Permit for Beam-1and User Permit for Beam-2 • User Permit for Both Beams Rear view • This Hw unit is installed in the User’s rack. Rear side drawing

  11. The User Interface: main features • ■Cost: •  2k CHF for the User Interface unit • + Connection cable expenditure  10 CHF/meter( LHC average case = 2.5k CHF for 250 meters) ■allows direct connection with many different types of hardware platform (PLC, VME, etc…) ■takes the two USER_PERMIT signalsand transmits them to the nearest BIC in a safe and reliable manner ■using differential signals (RS422 standard) on copper cable up to 1.2km ■19” rack mounted board. Height of 2U (~9cm). ■fully redundant Power Supplies User System Rack BIS Rack User System User Interface ‘A’ Permit ‘A’ Beam Interlock Controller ‘B’ Permit ‘B’

  12. To be connected to the BIS: responsibilities & duties Border User System/BIS The User Interfaces (and the BIC) have been designed to be SIL3 User System User Interface ‘A’ Permit ‘A’ Beam Interlock Controller ‘B’ Permit ‘B’ Hw within the panel can be tested and monitored at distance from the BIC ■ 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 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

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