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Accelerator Commissioning


Accelerator Commissioning F. Willeke Accelerator Systems Director NSLS-II Program Advisory Committee Meeting February 8-9, 2011 Overview Overview of Commissioning ... – PowerPoint PPT presentation

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Title: Accelerator Commissioning

Accelerator Commissioning
F. Willeke Accelerator Systems Director NSLS-II
Program Advisory Committee Meeting February 8-9,
  • Overview of Commissioning Activities in the last
    12 months
  • Overall Commissioning Schedule
  • Authorization Procedure (Reminder)
  • Injector Commissioning
  • LINAC Commissioning
  • Storage Ring Commissioning
  • Pentant Tests with Beam
  • Data and Document needed for commissioning

2010 Activities on Commissioning Planning
Aug 2009 Start concept of structuring the
authorization base (Steve Hoey) Nov 2009 First
version of comprehensive assumptions document
(FW) Dec 2009 Presentation of preliminary
Commissioning Plan to PAC Jan 2010 Commissioning
Task Force to develop the assumptions document
into commissioning planning document Feb
2010 Presentation of updated Commissioning
Planning at DOE Review May 2010 AS workshop with
sessions on commissioning involving between all
stake holders of AS Jun 2010 Series of planning
meetings between each subsystem group and
controls group to update requirements
on controls for testing, commissioning and
operations Sep 2010 As hoc taskforce on data and
documents needed for commissioning Oct
2010 Presentation of commissioning plan to
ASAC Dec 2010 Assigning a LINAC commissioning
coordinator (R. Fliller) and forming a LINAC
commissioning taskforce consisting of accelerator
physicists, operators, ESH group Jan
2011 Accelerator Physics submits a requirement
document on magnet data needed for
commissioning and operation
  • particular mode of accelerator operation with
    beam aiming
  • test the function of accelerator hardware and
    software with beam,
  • verify in particular the proper functioning of
    the equipment protection system,
  • verify the adequacy of radiation safety
    shielding, area radiation monitoring,
    ALARA system to minimize radiation
  • check the integrity and the consistency of the
    subsystems as built
  • develop refined settings of the hardware
    components to allow efficient injection, and
    storage of accelerator beams with good stability,
    beam intensity,
  • the advertised beam parameters, and good beam
  • condition accelerator hardware for optimum
    performance (vacuum, RF)
  • develop and document the procedures which are
    necessary to operate the accelerator routinely
    and to perform continuous improvement and

Commissioning Schedule
LINAC Commissioning
  • LINAC Milestones
  • Apr 2010 Contract Award
  • Jul 2010 Preliminary Design Review
  • Nov 2010 Final Design Review
  • Apr 2011 LINAC Frontend Delivery
  • May 2010 Start Frontend commissioning
  • (radiation device, no ARR)
  • Sep 2011 Start LINAC delivery
  • Oct 2011 Start LINAC Installation
  • Jan 2012 Start LINAC Commissioning

Authorization Basis Schedulefor Linac
  • Major Milestones
  • Feb 10 Distribute draft SAD and ASE to NSLS-II
    staff for comment
  • Feb 24 Conduct review meeting to discuss comment
  • Mar 17 Distribute revised SAD/ASE to LESHC
  • May 1 Complete LESHC Review
  • May 24 Complete Review and approval by Lab DDO
  • Jun 15 Submit to DOE BHSO
  • Jul 1 Appoint AAR team (DDO)
  • Jul 13 Obtain DOE approval for Commissioning
  • Aug11 ARR Team begins tracking of Linac
    commissioning status
  • Nov11 ARR team conducts formal review
  • Jan12 Following resolution of comments, Linac
    receives permission to begin commissioning

Commissioning Stages
LINAC Frontend (gun pre-buncher) early
delivery, commissioning and early tests by
NSLS-II staff in RF Lab, Special bunch-modes
LINAC commissioning by the vendor
(responsible) LtBTL (LINAC building part )
commissioned by NSLS-II-Staff , primary
secondary beam dump Booster LBTL commissioning
by NSLS-II staff in parallel to booster
integrated testing Booster commissioning by
vendor (vendors responsibility), participation
of NSLS-II staff BSTL (part in booster tunnel)
performed by NSLS-II staff with project
responsibility Storage Ring Commissioning Phase
1 (without ID) BSTL commissioning and injection
set up the storage ring beam optics adequacy
of correction systems adequacy of safety and
ALARA systems efficient injection adequacy of
beam instrumentation orbital stability RF set
up and stability RF conditioning cryogenic
stability beam stability vacuum integrity and
conditioning high intensity operations Storage
Ring Commissioning Phase 2 Integrate Insertion
Assumptions on Conditions
  • accelerator tunnel air conditioned tunnel
    temperature, humidity within specified range.
  • final survey and alignment shortly before start
    commissioning (ground settling)
  • heavy duty construction activities completed
  • global utilities available electrical,
    de-ionized water, chilled water, and liquid N2
  • (CF deliverables)
  • installation of girders and magnets completed
    1/2 year start of commissioning.
  • cable conduits and openings in the tunnel walls
    will be properly closed and shielded

SR Subsystem Status at Commissioning
  • integrated testing complete
  • Injectors and transfer lines commissioned
  • personal safety system and interfaces
    thoroughly tested
  • equipment protection system is fully
    implemented and tested via the control system.
  • magnets systems installed well before
  • precision alignment shortly before
  • insertion devices will not be installed
  • power supply systems are complete, technical
    interlocks have been properly tested
  • vacuum system has a vacuum of at least 10-7
  • two sc RF cavities installed driven by a single
    310kW transmitter station.
  • full suite of beam diagnostics is installed and
  • water cooling systems have been installed
  • timing system implemented
  • control system is fully implemented
  • relational database is fully functional
  • all application programs deemed necessary for
    commissioning available
  • injection systems have been installed and
  • fast orbit feedback has been implemented
  • transverse feedback damper system installed and

Radiation Safety during Commissioning
  • radiation protection systems installed and fully
    tested, no provisory solutions allowed, no
    exception possible.
  • initial beam intensity very small compared to
    nominal (0.1).
  • area monitors readings low intensity will be
    extrapolated to the next step in beam intensity.
  • extrapolation is reviewed and analyzed at each
    level of intensity before the next step in
    intensity is made.
  • initial high intensity studies assume losses e
    much larger than under optimized normal
    conditions? may need special (temporary
    controlled radiation areas)
  • beam containment system needs to be tested with
    beam, location of beam losses identified, beam is
    lost dominantly in the extra shielded confirmed
  • clear and unambiguous procedures operating
    staff needs to be trained to follow these
    procedures before operations with continuous
    injection of high charge (top-off, high intensity
    operation) can proceed.

Storage Ring Commissioning Modules
COMMSIONING PART I Establish Initial Beam
Operation, 5 moduls Check out Beam
Instrumentation 4 moduls Check out Safety
Functions 3modules Fine tuning of Beam Optics
7modules Functionality Tests 1moduls Fine Tuning
of Orbit and Emittance 3modules Synchrotron
Radiation Measurements 4mod. High Intensity
Studies 10 modules COMMSIONING PART II Safety
Related Measurements 2 modules ID Integration
8 x 7 modules Preparation of User Operation 3
70 commissioning modules Each needs 4 shifts on
average 300 shifts 100 days Operational
efficiency is assumed 50 ? Need 200 days of
Storage Ring Commissioning Part I
Establish Initial Beam Operation Obtain stored
beam Adjust and verify RF parameters first Orbit
Correction first iteration of correcting
chromaticity and coupling first iteration of
obtaining acceptable injection efficiency Check
out Beam Instrumentation establish beam monitor
calibration with local bumps checking intensity
monitors checking out loss monitors checking out
emittance monitors Check out Safety
Functions Checkout top-off safety
functions Check-out machine protection
system Check out BCS and ALARA functionality Fine
tuning of Beam Optics Beam Optics Checks and
correction (Response matrix, phase advance,
coupling measurements) Beam based
alignment measurement of chromatic distortions
and correction nonlinear dynamics related
measurements and corrections (D.A., amplitude
dependent tune shift, width of resonances,
higher order chromaticity) measure 1st and 2nd
order momentum compaction factor measure damping
Functionality Tests Fast orbit feed-back
test Fine Tuning of Orbit and Emittance Orbit
correction to micron level dispersion free
steering and orbit correction vertical emittance
tuning Synchrotron Radiation Measurements
Measurement of power deposition s and power
load check of temperature monitor system check of
vacuum interlock check of assumptions on absorber
and mask temperatures, monitoring and
cooling High Intensity Studies Set up of high
efficient injection Set-up of RF feedback and
fine tuning of feedback parameters and
LLRF Single Bunch Intensity Limit
measurements bunch lengthening by 3rd harmonic
cavity beam lifetime vs bunch length and bunch
intensity study BCS and ALARA studies with high
intensity Vacuum conditioning beam RF
conditioning with beam transverse damper
test Study of high multi-bunch intensity
Commissioning Staffing
  • commissioning will be organized in 3 8hr shifts
    per day and seven days per week.
  • commissioning labor budgeted within the project
  • commissioning requires operation of already
    commissioned subsystem
  • (injectors, cryogenics, utilities)
  • commissioning requires the involvement of all
    accelerator physicists (budgeted) ,
  • subsystem experts (budgeted) and operators
  • workload of off-hour shifts will be shared
    between all high level staff
  • engineers and technicians on call during
  • control room manned with 1 accelerator physicist
    33 weeks. _at_ 16000 hr (budgeted)
  • involvement of engineers less regular, will
    depend on the commissioning program
  • initially, one machine operator present every
  • will gradually develop into a mode with 2
    operators and no accelerator physicists
  • present NSLS controls group will develop to take
    over NSLS-II operations starting
  • in 2012 with operating the LINAC

Commissioning Information and Documentation
  • semi-formal meetings of 15 min at shift change (
    coming and going shift crews)
  • seamless transition from one shift to the next,
    communicate and discuss fine-tuning of program.
  • ?3 shifts per day and thus there will be three
    such meetings.
  • weekly commissioning meeting will summarize the
    commissioning results.
  • opportunity to optimize the commissioning program
    and direction.
  • weekly commissioning meetings will be documented
    including all material presented.
  • commissioning carried out in modules (ca 200)
    each requires written plan
  • the purpose,
  • the goal,
  • supporting documents,
  • results of calculations necessary to carry out
    the module
  • estimate on the needed machine time
  • labor resources required.
  • results of each module will be documented
  • raw data will be stored in an organized and
    accessible way
  • evaluation, resulting set-points, procedures,
    parameters will be documented
  • commissioning report will be published at the
    end of commissioning

Example for Searchable Data Base for Magnet
  • Needed for Trend Analysis-Magnet Acceptance
  • Lattice Modeling
  • Operation
  • Data to be stored in IRMIS Data Base and accessed
    by high level controls applications
  • Conditioning cycle (Imin, Imax, number of
    cycles), hysteresis information for each magnet
  • Data on individual magnets
  • Transverse Integrated nominal field component
    vs. Operating Current,
  • Longitudinal Field Profile nominal field
    component vs. Operating Current
  • Dipole Field Maps, 11 vertical planes, 5
    horizontal planes, 25 transverse planes
  • Effective Length vs Operating Current
  • Integrated Higher-order multipoles vs Operating
  • Correctors x / y / skew quad calibration
    constants as function of excitation
  • Integrated field as function of mode of operation
  • Dipole correction circuit calibration and
    hysteresis at full field
  • Survey data magnet displacement and roll as
    installed on girder
  • Girder survey data as installed
  • Survey data of magnets in ring (plans is to
    derive values from wire meas. girder survey)

Applications needed for Commissioning
  • Utility Control
  • tunnel temperature and humidity monitor
  • mechanical utilities status and control
  • electrical utilities status and controls
  • equipment enclosure monitor
  • water cooling system display
  • controls network monitor
  • Accelerator physics applications
  • static orbit corrections, first turn steering,
  • chromatic correction,
  • response matrix measurements,
  • phase advance measurements,
  • beam base alignment measurement,
  • bpm test programs,
  • beam optics measurement,
  • beam based alignment of sextupoles,
  • analysis on nonlinearities
  • dispersion measurement and correction,
  • closed Orbit bump page

Operation Software overall status page status,
alarm and warning monitor permit system monitor
and control data logger and data
display electronic logbook Operations
Software accelerator store/restore Injection
Control power supply control RF control fast
orbit feedback control fast transverse damper
control front-end monitoring and control machine
protection displ contr magnet temp. interlock
dspl contr scraper and collimators system
turn-on, system shutdown
Major Subsystem Control Power supply page RF
monitor and control Vacuum display and control
Cryogenics system display and control pulsed
magnet monitor and control injection element
display and control Insertion device
control Front-end control and status Beam
Diagnostics Beam Orbit page with Beam current
history and lifetime bunch intensity display and
history beam emittance display Timing system
display and control Synchronization system displ
contr Tune display and control Temperature
monitoring display Safety Systems personal
protection system status equipment protection
display and control beam containment display and
control top-off status monitor
Work on LINAC Booster Applications started
Accelerator Control Room during Commissioning
  • accelerator control room is the location where
  • operators operate the accelerator
  • operators coordinate with technical staff about
    technical difficulties and interventions
  • accelerator experiment are carried out
  • a logbook on accelerator operations is kept and
  • information in case of an emergency is to be
    obtained and such information will be delivered
  • an access point is established which manned 24hr
    a day 7 days a week
  • day-to-day coordination between accelerator and
    experimental floor are exchanged,
  • shift-change briefing meetings are held,
  • first hand information on the status of the
    accelerator is available
  • the responsibility for operating the accelerator
    safely within the safety regulations resides
  • routine safety measures are coordinated (LOTO)
  • preparation of the accelerator for operations is
    coordinated after an interruption
  • computer provide an optimized selection of
    delays for quick overview of accelerator status
  • an emergency stop button and other special
    installation (LAN, site-wide audio) are installed
  • functionality very different between
    commissioning and operation
  • at commissioning assumed that the control room
    is close to the accelerator hardware
  • control room LAN is accessible from the
    accelerator tunnel and from the mezzanine.

Commissioning Budget
Commissioning labor adequately budgeted Has
not been updated since CD2 ? Need to pull forward
commissioning resources to start storage ring
commissioning in FY13
Planning for Early Operations During Commissioning
  • Complete systems needed for Booster
    Commissioning LINAC, LtBTL, Injector
    Mech/Electr. Utilities
  • Complete systems needed for Storage Ring
    Commiss. LINAC, Booster (incl. all subsystems),
    Transfer-lines, M/E Utilities, Cryo-System, Lq.
    N2 system,

Labor needs to perform operations maintenance
of completed systems
Schedule Mitigation Plans
  • Superconducting RF is a schedule item with high
    technical, thus schedule risk
  • Alternative plan/fall back position for
    commissioning being developed
  • install 2nd booster cavity (PETRA 7-cell)
  • install sc cavities in the 2 months shutdown
    planned for installation of insertion devices.
  • ? this also would have the advantage to
    avoid contamination of superconducting cavity by
    poor early vacuum conditions.
  • Status detailed plans under development
  • Alternative Commissioning Schedule
  • Installation and Integrated testing is now
    performed in parallel, pentant by pentant
  • This offers the possibility to inject beam into
    pentant 1,2,3,4,5 (no circulation)
  • Beam operation at night or on week ends
  • Check out BPM system
  • Magnet system, power supply systems, calibration,
  • Check beam optics
  • Check orbit correction
  • This could be a major time saver in case there
    are unexpected or hidden problems which could be
    solved in parallel to installation and integrated
  • Status This was just proposed and the
    implications are being explored and discussed.

  • Detailed plans for commissioning have been
    developed in FY10/FY11
  • Assumptions for various commissioning phases
    have been well defined.
  • Commissioning activities are well understood.
  • Requirements such as staffing, documentations,
    data base, applications, and control room are
    well developed and planned accordingly.
  • A near term commissioning schedule has been
    updated and the overall commissioning schedule
    will be kept current as progresses made.
  • Commissioning budget in the current baseline will
    be updated
  • Schedule risks for commissioning period are well
    understood and mitigation plans are actively
  • Accelerator Systems will be ready for