1 mps commissioning report from the mpsc subgroup jan uythoven for the members of the mpsc subgroup
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Jan Uythoven, AB /BT LHCCWG, 25th September 2007 2
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, 25th September 2007 3
Outline General description, plans
Based on presentation to the MAC on 15th June Present status
Based on presentation in MPSCWG on 12th September by Alick Macpherson
Detailed info at:
http://lhccwg.web.cern.ch/lhccwg/MPS/mps.htm
Jan Uythoven, AB /BT LHCCWG, 25th September 2007 5
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, 25th September 2007 6
The LHC Machine Protection System & Interfaces
Beam Interlock SystemBeam
Dumping System
Injection InterlockPowering
Interlockssc magnets
PoweringInterlocks
nc magnets
QPS(several 1000)
Power Converters
~1500
AUG
UPS
Power Converters
Magnets
Magnet Current Monitor
CryoOK
RFSystem
Movable Detectors
LHCExperiments
Beam LossMonitors
BCM
Experimental Magnets
CollimationSystem
CollimatorPositions
Environmentalparameters
Transverse Feedback
Beam ApertureKickers
BeamLifetimeFBCM
Screens / Mirrors
BTV
Access System
Doors EIS
VacuumSystem
Vacuumvalves
AccessSafetyBlocks
RF Stoppers
Beam loss monitors
BLM
SpecialBLMs
Monitorsaperture
limits(some 100)
Monitors in arcs
(several 1000)
Timing System (Post Mortem
Trigger)
Operator Buttons
CCC
SafeLHC
Parameter
SoftwareInterlocks
LHCDevices
Sequencer
LHCDevices
LHCDevices
Safe Beam Parameter
Distribution
SafeBeamFlag
Jan Uythoven, AB /BT LHCCWG, 25th September 2007 7
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, 25th September 2007 8
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, 25th September 2007 9
- PFN voltage
- BIC permit
- BETS window
- Beam
Timing of kicker, BIC permit and BETS:
Extr. 1 Extr. 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, 25th September 2007 10
SPS extraction BIS information
Time offset wrt start of cycleDepth 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, 25th September 2007 11
Fast Magnet Current Change Monitor: MBG 4101M – Interlock Triggers at 10-4 change of I nominal
FMCM triggers @ 3984.4=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, 25th September 2007 12
LHC Hardware CommissioningD2.L8 presently under test
Presently being commissioned:
Quench Protection System & PIC system
Obtain experience with: Tools for Post Mortem
and Logging Sequencer
Quench detected17018 ms
Current ramp Current
starts to change17.027 ms
Quench heaters efficient17.026 ms
Quench loop reading PIC17021 ms
Quench event at17018 ms
Signal to BIC
Jan Uythoven, AB /BT LHCCWG, 25th September 2007 13
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, 25th September 2007 14
100 % Tested before First Beam
Beam Interlock SystemBeam
Dumping System
Injection InterlockPowering
Interlockssc magnets
PoweringInterlocks
nc magnets
QPS(several 1000)
Power Converters
~1500
AUG
UPS
Power Converters
Magnets
Magnet Current Monitor
CryoOK
RFSystem
Movable Detectors
LHCExperiments
Beam LossMonitors
BCM
Experimental Magnets
CollimationSystem
CollimatorPositions
Environmentalparameters
Transverse Feedback
Beam ApertureKickers
BeamLifetimeFBCM
Screens / Mirrors
BTV
Access System
Doors EIS
VacuumSystem
Vacuumvalves
AccessSafetyBlocks
RF Stoppers
Beam loss monitors
BLM
SpecialBLMs
Monitorsaperture
limits(some 100)
Monitors in arcs
(several 1000)
Timing System (Post Mortem
Trigger)
Operator Buttons
CCC
SafeLHC
Parameter
SoftwareInterlocks
LHCDevices
Sequencer
LHCDevices
LHCDevices
Safe Beam Parameter
Distribution
SafeBeamFlag
Jan Uythoven, AB /BT LHCCWG, 25th September 2007 15
MPS Commissioning Working Group Sub working group of the LHC Commissioning Working Group Six Nine 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.
That is going
to be tight….
...but was defined with circulating beam
in mind for November 2007…
Jan Uythoven, AB /BT LHCCWG, 25th September 2007 16
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, 25th September 2007 18
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, 25th September 2007 19
The Hardware Commissioning Manufacturing & Test Folder
Org
aniz
ati
on o
f th
e s
tore
d info
rmati
on w
ithin
arb
ore
scen
ce
SECTOR
HC REGION EQUIPMENT & EQUIPMENT GROUPS
B. Perea Solano
Jan Uythoven, AB /BT LHCCWG, 25th September 2007 20
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, 25th September 2007 21
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, 25th September 2007 22
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, 25th September 2007 23
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
Bea
m D
um
ping System
RF
System
Injection System
Collim
ation System
Etc.
MPS Commissioning
LHCCWG & LTC
Jan Uythoven, AB /BT LHCCWG, 25th September 2007 24
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, 25th September 2007 25
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: StatusSystem 1st Draft Edit Status EDMS Ready MTF Ready
Access ? - - No
BIS Yes Updated Yes* No
BLM Not yet - - No
Collimators Not yet - - No
FMCM Yes Minor edits No No
Injection System No - - No
LBDS Yes Edits needed No No
PIC Yes Minor edits No No
Vacuum system Yes Edits needed No No
WIC Yes Minor edits No No
Some slides from the presentation by Alick Macpherson in the MPS Comm. Wg. Of 12th 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 3rd 10th 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, 25th September 2007 29
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