Machine Protection System Commissioning plans Jan Uythoven Many thanks to the Members of the MPS Commissioning Working group, The MP Working Group and the LHC Commissioning Working Group. Special thanks to R. Schmidt and J. Wenninger

Outline Introduction The Commissioning of the MPS has started! Plans for further Commissioning and follow-up Conclusions Jan Uythoven, AB /BT MAC, 15th June 2007

Introduction Core elements of the LHC Machine Protection System Beam Interlock System Beam Dumping System Beam Loss Monitoring System Collimation System Quench Protection System & Powering Interlocks Injection System Together with other elements they will need to guarantee the ‘safety’ of the LHC = equipment protection Detect any equipment state or beam state that is potentially dangerous Dump the beam before damage to equipment can occur This safety of the system needs to be guaranteed (SIL 3) by Good system design Redundancy between subsystems Redundancy within critical subsystems Reliable system components Careful follow-up during production and installation Thorough commissioning of the system Individual System Tests System commissioning with and without beam Jan Uythoven, AB /BT MAC, 15th June 2007

The LHC Machine Protection System & Interfaces Devices Movable Detectors Beam Loss Monitors BCM Experimental Magnets Collimator Positions Environmental parameters Safe Beam Parameter Distribution LHC Devices LHC Devices SpecialBLMs Safe LHC Parameter Software Interlocks Sequencer Operator Buttons CCC LHC Experiments Transverse Feedback Beam Aperture Kickers Collimation System Beam Dumping System Beam Interlock System Safe Beam Flag Injection Interlock Powering Interlocks sc magnets Powering Interlocks nc magnets Magnet Current Monitor RF System Beam loss monitors BLM Beam LifetimeFBCM Access System Vacuum System Screens / Mirrors BTV Timing System (Post Mortem Trigger) Magnets Power Converters Monitors aperture limits (some 100) Monitors in arcs (several 1000) QPS (several 1000) Power Converters ~1500 AUG UPS Cryo OK Doors EIS Vacuum valves Access Safety Blocks RF Stoppers Jan Uythoven, AB /BT MAC, 15th June 2007

Commissioning has Started! LHC Hardware Commissioning Individual System Tests of LHC on the way Experience of MPS equipment with the powering of the first LHC sector SPS operation 2006 and 2007 Fast Magnet Current Change Monitoring in 2006 and later in 2007 Beam Interlock Systems following same design as LHC BIS being used for CNGS and TT40/TT60 (towards LHC!) extraction interlocking SPS ring interlock in 2007 LHC-like beam permit loop with clients connected to the dump through one of the 6 BICs connected to the loop Safe Beam Flag for CNGS operation Proof of the hardware and the design choices that have been made Experience concerning commissioning and operations of systems similar to those that will be used in the LHC Jan Uythoven, AB /BT MAC, 15th June 2007

SPS Extraction towards to LHC Using SPS Extraction BIS Inputs 8 to 14 are always maskable Inputs 1 to 7 are always un-maskable Mask status Safe Beam Flag status Software Interlock System Input J.Wenninger Jan Uythoven, AB /BT MAC, 15th June 2007

SPS extraction BIS information - PFN voltage - BIC permit - BETS window - Beam Timing of kicker, BIC permit and BETS: Extr. 1 Extr. 2 Signals as seen on an oscilloscope for testing the interlock system Beam Energy Tracking System considers dipole DCCT and HV of extraction kicker: Same hardware as for the LHC Beam Dumping System (but reverse logic) Jan Uythoven, AB /BT MAC, 15th June 2007

SPS extraction BIS information Bar graph summarising the status of the interlock system Time offset wrt start of cycle Depth in seconds wrt Time offset Extraction permit switching to TRUE for extraction (3 ms wide) Check this box to hold selected time range values Check this box to freeze display Jan Uythoven, AB /BT MAC, 15th June 2007

Fast Magnet Current Change Monitor: MBG 4101M – Interlock Triggers at 10-4 change of I nominal FMCM triggers @ 3984.4 =10E-4 3 FMCMs were operational last year and tested following well defined procedures. Modified CERN types (better adapted for pulsed magnets and additional controls interface) will be installed later this year M. Zerlauth, Adapted DESY design Jan Uythoven, AB /BT MAC, 15th June 2007

LHC Hardware Commissioning D2.L8 presently under test Quench event at 17018 ms Presently being commissioned: Quench Protection System & PIC system Obtain experience with: Tools for Post Mortem and Logging Sequencer Current ramp Current starts to change 17.027 ms Quench heaters efficient 17.026 ms Quench loop reading PIC 17021 ms Signal to BIC Quench detected 17018 ms Jan Uythoven, AB /BT MAC, 15th June 2007

Plans for (further) Commissioning and follow-up Thorough commissioning of the Machine Protection System: Individual System Tests Part of the LHC Hardware Commissioning LHC Cold Check-Out period (machine closed, ready for beam) System commissioning with beam Different phases depending on beam intensity and beam energy Special attention to the links between the different systems Most hours of MPS testing before first beam, Some systems completely tested before beam  Jan Uythoven, AB /BT MAC, 15th June 2007

100 % Tested before First Beam LHC Devices Movable Detectors Beam Loss Monitors BCM Experimental Magnets Collimator Positions Environmental parameters Safe Beam Parameter Distribution LHC Devices LHC Devices SpecialBLMs Safe LHC Parameter Software Interlocks Sequencer Operator Buttons CCC LHC Experiments Transverse Feedback Beam Aperture Kickers Collimation System Beam Dumping System Beam Interlock System Safe Beam Flag Injection Interlock Powering Interlocks sc magnets Powering Interlocks nc magnets Magnet Current Monitor RF System Beam loss monitors BLM Beam LifetimeFBCM Access System Vacuum System Screens / Mirrors BTV Timing System (Post Mortem Trigger) Magnets Power Converters Monitors aperture limits (some 100) Monitors in arcs (several 1000) QPS (several 1000) Power Converters ~1500 AUG UPS Cryo OK Doors EIS Vacuum valves Access Safety Blocks RF Stoppers Jan Uythoven, AB /BT MAC, 15th June 2007

MPS Commissioning Working Group Sub working group of the LHC Commissioning Working Group Six meetings since November 2006, 20 Members: Two people per main system Engineers in charge + a few others Webpage: http://lhccwg.web.cern.ch/lhccwg/MPS/mps.htm Mandate of Sub-Working Group on the Commissioning of the Machine Protection System   " Produce the detailed (=step by step) description of the commissioning of the LHC Machine Protection System and record the test results. " The aim is to have a first version available by June / July 2007.  ...but was defined with circulating beam in mind for November 2007… That is going to be tight…. Jan Uythoven, AB /BT MAC, 15th June 2007

Detailed Procedure for Each System Follow standard format for tests to be performed at the different phases Identical to LHC HC strategy To be published and approved by MPS comm. wg members Specific tests are listed and tabulated Jan Uythoven, AB /BT MAC, 15th June 2007

Format of the Procedures Jan Uythoven, AB /BT MAC, 15th June 2007

Manufacturing and Test Folder (MTF) Each Described Test is to be found back in the MTF system The Status of the Test (passed, not passed, pending) and possible test reports are kept in this system Identical system to what is being used for the LHC Hardware Commissioning Many of the MPS tests will be done during the LHC Hardware Commissioning Need to have compatible systems: MPS commissioning procedures can refer to LHC HC procedures Jan Uythoven, AB /BT MAC, 15th June 2007

The Hardware Commissioning Manufacturing & Test Folder B. Perea Solano SECTOR HC REGION EQUIPMENT & EQUIPMENT GROUPS Organization of the stored information within arborescence Jan Uythoven, AB /BT MAC, 15th June 2007

Validation of the tests performed to the equipment External Properties (LDB) + Property Values (test variables) + Parameters (historical tracking) Report documents, journals, EDMS, etc. Jan Uythoven, AB /BT MAC, 15th June 2007

Within MTF specific reports (=views) can be created to show the progress of the commissioning as an example by region for all the systems Jan Uythoven, AB /BT MAC, 15th June 2007

Status of Written Procedures Some of the procedures exist and are well advanced, (almost) ready for distribution within edms PIC, FMCM, Vacuum System Advanced (already presented) BIS system, BLM system Next presentations Injection System, WIC System Outstanding main systems (but already worked upon) Beam Dumping System, Collimation System Other systems – need to be assigned to people to write procedures: Experiments, RF & Feedback, Aperture Kickers & AC dipole, Safe Beam Flag etc. After comments and approval to be described in MTF Results of tests to be entered in MTF Custom reports to be created to follow progress Jan Uythoven, AB /BT MAC, 15th June 2007

Different Procedures & Work in other Groups LHC Hardware Commissioning WG: Procedures per System – create for MPS if it does not exist LHC Commissioning Working Group ‘Procedures’ are given per phase of LHC Commissioning First Injection (pilot), energy ramp, increasing the intensity etc. MPS commissioning Procedures are per System, over all phases Etc. Cold Check-out Hardware Commissioning Injection Ramp Increasing Intensity Beam Dumping System RF System Injection System Collimation System MPS Commissioning LHCCWG & LTC Jan Uythoven, AB /BT MAC, 15th June 2007

Besides Procedures MPS Commissioning Working Group is a forum to discuss different items related to the MPS commissioning and operation Establishes a team of experts who can be called in during LHC operation when required Training for Engineers In Charge Jan Uythoven, AB /BT MAC, 15th June 2007

Topics concerning the MPS under discussion in the different working groups BLM operation Which thresholds to set? Proposed 30 % of quench level, for the arcs, this concerns operational efficiency and not machine protection When and How to change BLM settings? Are remote changes via ‘Management of Critical Settings’ more risky than a local change? Procedure for disabling single BLMs when required Protection settings (collimators) during the different phases of LHC commissioning Relation with limits on beam parameters (beta beta, orbit etc.) during the different commissioning phases Interlocking Strategy of the Aperture kicker and Ac Dipole Based on keys and LHC Safe Beam Flag Jan Uythoven, AB /BT MAC, 15th June 2007

Conclusions The Commissioning of the LHC Machine Protection System has already started LHC Hardware Commissioning SPS extraction and ring Beam Interlock System, FMCM Proof of the hardware design choices that have been made Experience concerning commissioning and operations of systems similar to those that will be used in the LHC To guarantee a ‘Safe’ LHC operation, the commissioning procedures of the different MPS components Are being described in detail following a fixed format, distributed and agreed upon Will be followed up in the Manufacturing and Test Folder A lot of work still to be done On paper (procedures, MTF, reports) In reality, following the paper work The fruits of the work should be: Limited confusion during LHC commissioning, with and without beam Never see the destructive potential of the LHC being confirmed Jan Uythoven, AB /BT MAC, 15th June 2007