numi commissioning

NuMI

DOE ReviewMay 25, 2004

CommissioningNuMI Commissioning

• Overview

• CD-4 Goals

• Planning

• Pre-commissioning activities

• Commissioning

• Summary

NuMI


CommissioningOverview

• Commissioning = bringing the NuMI facility into a state of operation« NuMI project activities

« Off-project activities such as Main Injector preparations

• This definition is slightly modified for the Technical Components« Commissioning = bringing the facility into operation using beam

« Checkout = commissioning sub-systems prior to beam

• The MINOS detectors can be commissioned almost fully using cosmic rays

NuMI


CommissioningOverview

• The NuMI project has retained the responsibility for conducting and documenting all checkout and commissioning activities

• Coordinators will schedule these activities to maximize efficiency and minimize impact to accelerator operations« NuMI Commissioning Coordinator – Bruce Baller

« MINOS Near Detector Commissioning Coordinator – Peter Shanahan

• Commissioning workshop held in April to define checkout and commissioning steps« Attended by ~35 participants from NuMI, MINOS, Operations,

ES&H, AD management

NuMI


CommissioningCD-4 Goals

The NuMI Project Management Plan describes the Technical Commissioning Goals required to meet CD-4

GoalParameter Measurement Commissioning Goal

1Proton intensity in target hall Toroid (or equivalent) beam

intensity at entrance to the Target Hall

Greater than 1E12 120 GeV protons/spill

2Beam alignment Transverse distributions of the

proton beam and secondary beamsProton direction established to within 1 mr of the known direction to the Far Detector in the Soudan mine.

3Neutrino beam energy Near detector event energy Low energy, 2-4 GeV

4Cosmic ray muons detected in the MINOS near detector

Near detector data read out through DAQ system

Majority of 153 near detector planes sensitive to muons

5Near detector neutrino flux Charged current event rate in 1.5

ton fiducial regionObserver neutrinos in the near detector produced by the NuMI beam

6

Cosmic ray muons and atmospheric neutrinos detected in each of the two MINOS far detector super-modules

Far detector data read out through DAQ system

Majority of the 484 planes of the far detector sensitive to muons and atmospheric neutrinos

NuMI


CommissioningCD-4 Goals

• We plan to follow the Main Injector model for documentation & acceptance of goal achievement - Greg Bock memos to Steve Webster with supporting documentation« Goal 1: ACNET parameter page showing proton intensity in NuMI

beamline

« Goal 2: ACNET parameter page showing beam position in pre-target & display showing beam position in the hadron monitor

« Goal 3,5: Detector measurements of pulse height and event length consistent with neutrino energies of 2 – 4 GeV

« Goal 4,6: MINOS displays of cosmic ray events in the near and far detectors

NuMI


CommissioningPlanning

• NuMI checkout & commissioning activities are tracked using MS Project« Each task is assigned to a responsible person, approx start &

approx duration, notes, device status

• Pre-commissioning activities« Main Injector Preparations (~65 tasks)« NuMI checkout (~200 tasks)« Administrative Approvals (~15 tasks)« Operations Preparations (~20 tasks)

• Commissioning« NuMI commissioning (~60 tasks)« Main Injector High Intensity (2 tasks – need experience)« Turnover to Operations (2 tasks)

NuMI


CommissioningPlanning

• The commissioning plan includes several flavors of tasks« Canonical off-project tasks that can be readily estimated, e.g.

Design/build Main Injector Batch-by-Batch integrator

« Main Injector studies that are difficult to estimate (e.g. high intensity beam studies) but have a well defined result

« NuMI systems checkout tasks costed in the Master Schedule

« Administrative tasks, e.g. AD & DOE approve MI safety envelope

« Checkout steps, e.g Put profile monitors into the beam

• The primary purpose of the plan is to ensure that all required tasks are identified and completed in the proper sequence

NuMI


CommissioningPre-Commissioning Activities

• Description of pre-commissioning activities« Main Injector Preparations

« NuMI Checkout

« Administrative Approvals

« Operations Preparations

NuMI


CommissioningMain Injector Preparations

• After commissioning, NuMI will operate in a mixed-mode with antiproton stacking at 120 GeV

• A 1.877 sec MI cycle will accommodate 6 batches of 3.3x1013 protons/cycle« The Antiproton Source requires 1 batch of 0.8x1013 protons to be

achieved by slip-stacking

« NuMI will receive 5 batches for a total intensity of 2.5x1013 protons

« Antiproton beam requirements are tighter than NuMI

• Commissioning will be done on a special NuMI-only cycle

NuMI


CommissioningMain Injector Preparations

• High intensity studies (Damper system)

• Synchronizing Booster/MI injection (Booster Cogging)

• MI/NuMI event timing

• Multi-batch intensity measurement

• MI beam quality inputs to the NuMI Beam Permit System (BPS)

• Orbit and extraction issues

Planned for normal operationNot necessary to meet CD-4

NuMI


CommissioningHigh Intensity Studies

• The bunch-by-bunch digital damper system (Run II) is needed for high intensity

• Instrumentation, RF cavities and kicker exist

• Longitudinal dampers operational now

• Transverse damper board in debugging

• Start multi-batch mode studies after board is fully tested (late June)

• Demonstrate high intensity multi-batch capability before the August shutdown

NuMI


Commissioning

NuMI batches

pbar batch Beam on the pbar target

Multi-Batch Pbar Extraction

No dampers

No cogging

NuMI


CommissioningBooster Cogging

• Booster notch needs to be sync’d to the kicker and timed to MI batches

• Booster cogging turned on

• No losses with < 3 Booster turns

• ~20% loss with 4 turns

N4 N5 Pbar N1 N2

Time (ns)

Revolution

NuMI




« NuMI Checkout



NuMI


CommissioningNuMI Checkout

• Sub-system checkout tasks are included in the master schedule at a summary level to capture costs, resources« The purpose of the Commissioning Plan is to ensure that every

sub-system is fully checked out before commissioning begins

• Checkout is a multi-step process that culminates in the documentation of readiness by the L3 manager in the NuMI Beamline electronic logbook

• The Commissioning Plan identifies a final checkout step (~200) that requires documented completion« Notes field defines the required checkout action for each sub-

system (e.g. magnets: Polarity check and power testing completed)

NuMI


CommissioningNuMI Devices

• Primary beam: 49 magnets, 24 BPM’s, 10 Profile Monitors, 2 calibration targets, 50 loss monitors, 4 total loss monitors, 2 toroids, 3 beam vacuum systems

• Magnetic shielding check on HV101 string

• Target hall: 6 thermocouples, Budal monitor, target helium flow, target/horn drive/position, RAW system status (for each module), chase cooling system flow/pressure

• Decay pipe: vacuum status/pressure, RAW system status

• Absorber: 8 thermocouples, RAW system status, leak rate study

• Hadron/Muon Monitors: HV/LV status

• Beam Permit System: 9 input summary checks

• Safety System: 2 administrative checks

NuMI




« NuMI Checkout



NuMI


CommissioningAdministrative Approvals

• Main Injector« The MI Shielding Assessment has been revised to allow operation

at 3.3x1013 protons/cycle* In review now

« MI Safety Envelope will be reviewed and approved concurrent with NuMI Safety Envelope

• NuMI« The NuMI Shielding Assessment and Safety Envelope will be

discussed in Nancy Grossman’s talk

« Commissioning plan includes Accelerator Readiness Review, final walkthrough by ES&H committee, Running Conditions development and approval

NuMI




« NuMI Checkout



NuMI


CommissioningOperations Preparations

• Controls needs« Add NuMI devices to the ACNET database« Develop parameter pages« Set up BPS and alarms & limits pages, sequencers« Define device list for data-logging« Set up data logger« Set up Beam Loss Budget Monitor and Beam Budget Monitor

• Administration & Training« Develop Search & Secure procedures & training« Develop emergency response procedures & training« Define access requirements, threshold criteria for NuMI operation« Develop and conduct operator training« Define list of qualified experts

NuMI


CommissioningCommissioning

• Commissioning team composed of experts from NuMI, External Beams Dept & CERN

• Use the existing NuMI Beamline electronic logbook for documentation

• Commissioning is divided into 11 phases

• The first 8 will be conducted on a special NuMI “study cycle” with a cycle time of ~ 2 minutes« Allows time for evaluation between shots

• The Beam Permit System (BPS) is administratively controlled by the Coordinator by the use of a “golden file”

NuMI



• MI & NuMI setup (~4 days)« Establish stable 1 batch MI beam (3x1011 ppp) on NuMI cycle« Start NuMI ramps, ensure devices are reading back, data logging,

BPS active, AutoTune working, NuMI kicker is OFF

• First Beam to NuMI (~3 days)« Enable kickers« Tune beam to hadron absorber (AutoTune semi-automatic)« Check function of loss monitors with profile monitors in/out« Calibrate BPM’s

• Aperture scans (~4 days)« Scan Lambertson & 2 NuMI magnet apertures« Declare BPS golden file« Start tuning with correctors

Meet CD-4 Goal 2

NuMI



• Horn Alignment (~2 days)« Scan horn 1 and horn 2 using neck and cross-hair alignment

system

« BPM and hadron monitor response checked concurrently

• Target/Baffle Alignment (~2 days)« Target/baffle are scanned while in Low Energy (LE), Medium

Energy (ME) and High Energy (HE) positions

« Hadron monitor response checked concurrently

• Raise Intensity & Check Calibration (~1 day)« Increase intensity to 1x1012 protons/cycle

« Check instrumentation calibration Meet CD-4 Goal 1

NuMI



• First Neutrinos (~2 days)« Start horn pulsing & log neutrinos in the near detector« Beam-on and beam-off radiation surveys

• Multi-batch tuning (~7 days)« Increase number of batches« Check ramp, instrumentation timing & losses

• Reduce cycle time - Mixed-mode (~1 day)« Start NuMI/pbar mixed mode at 2 sec cycle time

• Main Injector – High Intensity (~30 days)« Check ramp, instrumentation timing & losses

• Turnover to Operations« Document tunes & operator training

Meet CD-4 Goal 3,5CD-4 Met

NuMI


CommissioningSummary

• The April commissioning workshop was valuable« Recommendations on philosophy, tips

« NuMI, Operations and AD management agree on all points

• The commissioning plan codifies all major and many minor tasks« Plan will be updated regularly, posted on the web and tracked in

weekly commissioning meetings

• We expect to achieve CD-4 after several weeks of commissioning

numi commissioning

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