# Presentation: 227599

## NuMI Commissioning

- Overview
- CD-4 Goals
- Planning
- Pre-commissioning activities
- Commissioning
- Summary

## Overview

- 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

## Overview

- 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

## CD-4 Goals

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

## CD-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

## Planning

- 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)

## Planning

- 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

## Pre-Commissioning Activities

- Description of pre-commissioning activities
- Main Injector Preparations
- NuMI Checkout
- Administrative Approvals
- Operations Preparations

## Main 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

## Main 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 operation*
*Not necessary to meet CD-4*

## High 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

## Multi-Batch Pbar Extraction

- NuMI batches

- pbar batch

- Beam on the pbar target

- No dampers

- No cogging

## Booster 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

- Time (ns)

- Revolution

## Pre-Commissioning Activities

- Description of pre-commissioning activities
- Main Injector Preparations
- NuMI Checkout
- Administrative Approvals
- Operations Preparations

## NuMI 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 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

## Pre-Commissioning Activities

- Description of pre-commissioning activities
- Main Injector Preparations
- NuMI Checkout
- Administrative Approvals
- Operations Preparations

## Administrative 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

## Pre-Commissioning Activities

- Description of pre-commissioning activities
- Main Injector Preparations
- NuMI Checkout
- Administrative Approvals
- Operations Preparations

## Operations 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

## Commissioning

- 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”

## Commissioning

- 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*

## Commissioning

- 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*

## Commissioning

- 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 3,5*

*CD-4 Met*

## Summary

- 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