1 MPS Commissioning Report from the MPSC subgroup Jan Uythoven For the Members of the MPSC subgroup

Jan Uythoven, AB /BT LHCCWG, 25 th September Membership Jan Uythoven (chairman), Alick Macpherson (secretary), Ralph Assmann, Roger Bailey, Bernd Dehning, Brennan Goddard, Eva Barbara Holzer, Verena Kain, Mike Lamont, Blanca Perea Solano, Laurette Ponce, Bruno Puccio, Stefano Redaelli, Rudiger Schmidt, Benjamin Todd, Jorg Wenninger, Markus Zerlauth. (Other) EICs: Reyes Alemany Fernandez, Magali Gruwe, Walter Venturini-Delsolaro.

Jan Uythoven, AB /BT LHCCWG, 25 th September Outline General description, plans Based on presentation to the MAC on 15 th June Present status Based on presentation in MPSCWG on 12 th September by Alick Macpherson Detailed info at:

Jan Uythoven, AB /BT LHCCWG, 25 th September Mac Talk

Jan Uythoven, AB /BT LHCCWG, 25 th September 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 LHCCWG, 25 th September The LHC Machine Protection System & Interfaces Beam Interlock System Beam Dumping System Injection Interlock Powering Interlocks sc magnets Powering Interlocks nc magnets QPS (several 1000) Power Converters ~1500 AUG UPS Power Converters Magnets Magnet Current Monitor Cryo OK RF System Movable Detectors LHC Experiments Beam Loss Monitors BCM Experimental Magnets Collimation System Collimator Positions Environmental parameters Transverse Feedback Beam Aperture Kickers Beam Lifetime FBCM Screens / Mirrors BTV Access System DoorsEIS Vacuum System Vacuum valves Access Safety Blocks RF Stoppers Beam loss monitors BLM Special BLMs Monitors aperture limits (some 100) Monitors in arcs (several 1000) Timing System (Post Mortem Trigger) Operator Buttons CCC Safe LHC Parameter Software Interlocks LHC Devices Sequencer LHC Devices LHC Devices Safe Beam Parameter Distribution Safe Beam Flag

Jan Uythoven, AB /BT LHCCWG, 25 th September 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 LHCCWG, 25 th September 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 LHCCWG, 25 th September PFN voltage - BIC permit - BETS window - Beam Timing of kicker, BIC permit and BETS: Extr. 1Extr. 2 SPS extraction BIS information 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 LHCCWG, 25 th September SPS extraction BIS information 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 Bar graph summarising the status of the interlock system

Jan Uythoven, AB /BT LHCCWG, 25 th September Fast Magnet Current Change Monitor: MBG 4101M – Interlock Triggers at change of I nominal FMCM =10E-4 M. Zerlauth, Adapted DESY design 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

Jan Uythoven, AB /BT LHCCWG, 25 th September LHC Hardware Commissioning D2.L8 presently under test Presently being commissioned: Quench Protection System & PIC system Obtain experience with: Tools for Post Mortem and Logging Sequencer Quench detected ms Current ramp Current starts to change ms Quench heaters efficient ms Quench loop reading PIC ms Quench event at ms Signal to BIC

Jan Uythoven, AB /BT LHCCWG, 25 th September 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 LHCCWG, 25 th September % Tested before First Beam Beam Interlock System Beam Dumping System Injection Interlock Powering Interlocks sc magnets Powering Interlocks nc magnets QPS (several 1000) Power Converters ~1500 AUG UPS Power Converters Magnets Magnet Current Monitor Cryo OK RF System Movable Detectors LHC Experiments Beam Loss Monitors BCM Experimental Magnets Collimation System Collimator Positions Environmental parameters Transverse Feedback Beam Aperture Kickers Beam Lifetime FBCM Screens / Mirrors BTV Access System DoorsEIS Vacuum System Vacuum valves Access Safety Blocks RF Stoppers Beam loss monitors BLM Special BLMs Monitors aperture limits (some 100) Monitors in arcs (several 1000) Timing System (Post Mortem Trigger) Operator Buttons CCC Safe LHC Parameter Software Interlocks LHC Devices Sequencer LHC Devices LHC Devices Safe Beam Parameter Distribution Safe Beam Flag

Jan Uythoven, AB /BT LHCCWG, 25 th September MPS Commissioning Working Group Sub working group of the LHC Commissioning Working Group Six Nine meetings since November Members: Two people per main system Engineers in charge + a few others Webpage: 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 That is going to be tight…....but was defined with circulating beam in mind for November 2007…

Jan Uythoven, AB /BT LHCCWG, 25 th September 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 LHCCWG, 25 th September Format of the Procedures

Jan Uythoven, AB /BT LHCCWG, 25 th September 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 LHCCWG, 25 th September The Hardware Commissioning Manufacturing & Test Folder Organization of the stored information within arborescence SECTORHC REGION EQUIPMENT & EQUIPMENT GROUPS B. Perea Solano

Jan Uythoven, AB /BT LHCCWG, 25 th September Report documents, journals, EDMS, etc. Validation of the tests performed to the equipment External Properties (LDB) + Property Values (test variables) + Parameters (historical tracking)

Jan Uythoven, AB /BT LHCCWG, 25 th September 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 LHCCWG, 25 th September 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 See Update on Later Slide

Jan Uythoven, AB /BT LHCCWG, 25 th September 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 SystemCollimation System Etc. MPS Commissioning LHCCWG & LTC

Jan Uythoven, AB /BT LHCCWG, 25 th September 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 LHCCWG, 25 th September 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

26 MPSC Procedures: Status System1 st Draft Edit StatusEDMS Ready MTF Ready Access?--No BISYesUpdatedYes*No BLMNot yet--No CollimatorsNot yet--No FMCMYesMinor editsNo Injection SystemNo-- LBDSYesEdits neededNo PICYesMinor editsNo Vacuum systemYesEdits neededNo WICYesMinor editsNo Some slides from the presentation by Alick Macpherson in the MPS Comm. Wg. Of 12 th September 2007 To be started: MKA & AC dipole, movable objects of experiments, Safe Beam Flags,…

27 Timetable for Completion of Procedures 1. All out-standing procedures submitted to Jan by 1st October*. 2. Procedures returned to groups after review/cross check by Jan/Alick Expect ~ 1 week per procedure for review and feedback and 2 weeks for corrections. Target: Review 1 procedure per week. Review process started with BIS procedure 3. From 1st October, start EDMS checking procedures Target: 1 per week. Start with BIS procedure 4. As EDMS approval finishes, transfer to MTF. Allow 1 week for transfer to MTF 5. Look to have all procedures in MTF by mid December * Collimator procedure linked to presentation at MPSCWG on 3 rd 10 th Oct

28 Procedures: More Observations Most procedures have had a first revision  Still awaiting some procedures Question: is data/state logging considered part of MPS commissioning? MPSC Commissioning should (where possible) be modular  Use hardware commissioning to set entry conditions for front end systems.  HWC Procedures + results (MTF) to be confirmed by MPSC procedure  Test the interface with the BIS => complementary to BIS Commissioning  Set exit conditions that allow the system to proceed to validations during cold machine cold checkout or validation with beam. MPSC validation must insure that there is no possibility of machine protection risks due to operator controls  => procedures to confirm that operators can’t change critical settings? Dependency on info from BIS and other systems must be made clear  Beam Info flag should not be used for any critical action! Answer ~ no Nice discussion point…

Jan Uythoven, AB /BT LHCCWG, 25 th September 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