1 mps commissioning report from the mpsc subgroup jan uythoven for the members of the mpsc subgroup

1

MPS CommissioningReport from the MPSC subgroup

Jan Uythoven

For the Members of the MPSC subgroup

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.


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


Mac Talk


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


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


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


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


- 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)


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


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


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


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


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


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…


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


Format of the Procedures


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


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


Report documents, journals, EDMS, etc.

Validation of the tests performed to the equipment

External Properties (LDB) + Property Values (test variables) + Parameters (historical tracking)


Within MTF specific reports (=views) can be created to show the progress of the commissioning as an example by region

for all the systems


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


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


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


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

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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,…

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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

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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…


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

1 mps commissioning report from the mpsc subgroup jan uythoven for the members of the mpsc subgroup

Documents

beam slide

beam state

lhc bis

beam interlock systems

good system design redundancy

beam permit loop

ab bt lhccwg

dump th