Accelerator Status, Operations & PIP January 22, 2014 Sergei Nagaitsev

Fermilab Accelerator Complex BNB: MicroBooNE NuMI: MINOS+, MINERvA, NOvA Fixed Target: SeaQuest, Test Beam Facility Muon: g-2, Mu2e (future) Sergei Nagaitsev, Fermilab PAC, Jan ,

Fermilab Accelerator Division  ~410 FTE (40 scientists, 90 engineers, 120 technicians)  Operate 4 proton accelerators (24/7):  Linac, Booster, Main Injector, Recycler  Deliver beam to:  NuMI, FTBF, SeaQuest (120 GeV)  BNB, Muon Campus (8 GeV)  MTA (400 MeV)  Construct accelerator facilities for Muon Campus, g-2, and Mu2e.  Provide effort, support to projects and programs (e.g. PIP, PIP-II, LBNE, g-2, Mu2e, MAP, SRF, IARC, LCLS-2, …)  Operate test facilities (SRF, ILC, PXIE, HBESL) Sergei Nagaitsev, Fermilab PAC, Jan ,

 Apr 2012 – Sep 2013, ~18 months have been spent in shutdown and commissioning, adapting the accelerator complex after the end of the Tevatron era  details in Back-up slides  Driven by the Intensity Frontier program  High intensity proton beams for experiments to explore the Neutrino Sector to explore rare decays and rare processes in muons Sergei Nagaitsev, Fermilab PAC, Jan ,

Booster and Main Injector Projected Performance  Booster and Main Injector are supporting 3 programs:  Booster Neutrino Beam: MiniBoone and MicroBoone  NuMI: MINOS+, MINERvA, NOvA  SY120: SeaQuest, Test Beam  Guidance:  NuMI first priority  SY120 is supported at 10% of timeline (~1 event per minute)  BNB not affect NuMI until MicroBoone is operating commissioning begins in May at low repetition rate, then up to 1 Hz in August Sergei Nagaitsev, Fermilab PAC, Jan ,

Accelerator Performance for NuMI  Started delivering protons to NuMI in 2005  ~1.55e21 in 7 years: NO v A goal is 3.6e21  Most intense high energy neutrino beam in the world Sergei Nagaitsev, Fermilab PAC, Jan ,

320 kW on target  Previous operation:  H- linac at ~35 mA  Charge exchange injection into Booster turns: 4.3e12  9 pulses (at 15 Hz) into Main Injector with RF slip stacking  Ramp to 120 GeV at 204 GeV/s and extract to NuMI target  3.7e13 / 2.2 sec cycle 323 kW Sergei Nagaitsev, Fermilab PAC, Jan ,

Increasing Beam Power to 700 kW  Move slip-stacking to recycler  11 batch -> 12 batch  Increase Main Injector ramp rate (204 GeV/s -> 240 GeV/s)  330 (380) -> 700kW with only ~10% increase in per- pulse intensity  Peak intensity 10% just more frequent Main Injector Recycler Sergei Nagaitsev, Fermilab PAC, Jan ,

The Plan  Booster at 4.3e12 ppp, 7.5 Hz ✔  Begin NuMI operation with MI only ✔  2.5e Hz (1.67 s cycle)  ~290 kW peak  Commission Recycler as proton machine  Injection, extraction, instrumentation, slip stacking ✔  Full intensity in May 2014  4.9e Hz (1.73 s cycle) – limited by Booster  ~550 kW peak ~500 kW with SY120 cycles included  Begin SY120 operation at 2e11 ✔  Raise intensity to 2e12 in January  8e12 per spill in March Sergei Nagaitsev, Fermilab PAC, Jan ,

PIP - Linac Linac high-lights  Adjusting to new injector Round beam Bunched beam Twiss parameters Lower current  Upgraded diagnostics/software BPMs Toroids 10 RFQ Linac Modulator & 7835 Tube Socket Low Energy Linac Triode RF systems Sergei Nagaitsev, Fermilab PAC, Jan , 2014

Linac Beam Operations Sergei Nagaitsev, Fermilab PAC, Jan , Linac efficiency is higher with new source but we are/will be running at lower currents (RFQ design)

Booster  RF Cavity Refurbishment Continues  Operating with lower RF voltage need 17 cavities for acceleration of 4.5e12 19 cavities total, so 2 are out being refurbished  Solid State – Some small changes after initial install  Accelerator Physics (PIP/Operations)  Alignment  Beam Optics  Beam Notcher System  Cogging  Upgrades to RF Low Level 12 Booster Sergei Nagaitsev, Fermilab PAC, Jan , 2014

Booster Flux Proton/event (Scale – E12) Green -> Booster Study Pulses Yellow -> Beam to MI/NOvA Cyan -> Beam to MiniBoon Red -> Beam to MI/NOvA Yellow ->Proton/Hour Purple -> Booster RF Sum Sergei Nagaitsev, Fermilab PAC, Jan ,

PIP- Proton Improvement Plan enable Linac/Booster operation to - deliver 2.2E17 protons per hour (at 15 Hz) in 2016 while maintaining - Linac/Booster availability > 85%, and - residual activation at acceptable levels and also ensuring a useful operating life of the proton source through Injector/Linac Booster Sergei Nagaitsev, Fermilab PAC, Jan ,  Modulator upgrade FNAL AD – IGBT Design SLAC – MARX Generator  Laser Notcher  Solid State Amp Upgrade for LL Driver Rack  Klystron upgrade for 7835 triode Contract Awarded  LCW upgrades  Beam Physics  Notch Absorber System  Short Kickers  Pulse Power System  Booster Cavity Refurbishment  New Tuners  Spare Cavity (20)  Harmonic Cavity (Perpendicular Bias)  Beam Physics  Beta Beating  Coupling  Cogging – magnetic Highlights since last PAC

Sergei Nagaitsev, Fermilab PAC, Jan , Proton Improvement Plan Projection NOvA Shutdown g-2 Mu2e 8 GeV 120 GeV

Linac PIP - Modulator and Laser Notcher Modulator Design: tested 3 cell LGBT – building up a nine cell unit Sergei Nagaitsev, Fermilab PAC, Jan , Laser Notcher: Figure showing the placement of the 750KeV laser notcher attached to the end of the RFQ flange Simulation of the laser light reflection Optics testing Three cell test successfully – proceeding to 9 cell buildup/tests

Booster PIP – Notcher & Absorber Sergei Nagaitsev, Fermilab PAC, Jan , The new absorber system is working well. Building of new PS and short kickers underway. The above plot shows current notch simulation with 3 long kickers. Shorter kickers will have faster rise times, cleaner notch and reduced kick on circulating beam. Testing of first two short kickers underway. New pulser NOvA style Booster Short Kickers – drop in replacements Absorber

Sergei Nagaitsev, Fermilab PAC, Jan , The two plots show the difference between two rad surveys after running similar flux for a week. The new system has greatly reduced residual activation in several areas of Booster. The new absorber system directs the beam to an absorber – old system was not designed for high flux and the kicked beam ‘notch’ into collimators was uncontrolled PIP – Booster Notcher & Absorber Continued Rad Survey Data Dec 2013 New Absorber Collimators

Booster PIP - Refurbishment of 40 year old cavities (facelift ) Sergei Nagaitsev, Fermilab PAC, Jan , Milling Machine The repair of the flange interface is a critical step in the rebuild process. This connection has been shown to be one of the limiting factors in reaching 15 Hz operation. Recent addition of a milling machine has helped. Cavity Removal Cool-down Remove Tuners Rebuild - Cones & Tuners Rebuild Stems/Flanges Re-Assemble Testing Weeks Scorched Ferrite Ring Chipped/Cracked LCW Leak 010

Sergei Nagaitsev, Fermilab PAC, Jan , Presently we are at a 9-10 week per cavity rate: The refurbishment rate has been consistent with allotted labor. Booster PIP - Cavity Refurbishment Timeline PAC Present

Booster PIP - New Cavities and Harmonic Cavity  Harmonic cavity work is underway to help with beam capture, transition and possibly extraction.  Based upon work at TRIUMP and LANL  Simulations look promising  University interest – Illinois Institute of Technology Sergei Nagaitsev, Fermilab PAC, Jan , Specifications for Design of New Accelerating Cavities for the Fermilab Booster underway with testing of current cavities to confirm modeling. 55 KV,15Hz Thermal Profile (F) Split Image of Booster Cavity Magnetic loss density (100 kV)

Booster Neutrino Beamline Sergei Nagaitsev, Fermilab PAC, Jan ,  Re-started beamline October 22.  On-target running Nov 1 – 8, 5.4E18 protons.  Off target running since then, 4.9E19 protons.  (protons delivered from Booster.)

MI Status  We are providing about 290 KW (250 KW with SY120) to the NuMI target with no slip stacking utilizing a faster ramp (1.67 sec).  By not using slip stacking we are able to keep our tunnel loss free during Recycler commissioning.  We are providing slow extracted beam to SY120. We are working on improving the slow spill beam quality for Seaquest.  Reduce the 360 Hz beam structure  Improve the 53 MHz duty factor by blowing up the beam longitudinally. Sergei Nagaitsev, Fermilab PAC, Jan ,

Recycler Status  Have slipped stacked 2 Booster batches and transferred to MI.  Verified that we have the momentum aperture for slip stacking.  Commissioned High Level and low level RF.  Injected a total of 1E13 protons captured in 53 MHz and cleanly transferred in MI.  We have seen evidence of beam scrubbing.  Recycler vacuum recovered.  Next we plan to increase the beam intensity in the Recycler and slip stack 12 Booster batches. Sergei Nagaitsev, Fermilab PAC, Jan ,

Recycler performance Sergei Nagaitsev, Fermilab PAC, Jan , High Intensity proton beam in RecyclerRecycler slip stacking

Integrating RR into Operations  We can integrate RR into Operations as soon as we can reliably slip stack 2E13 p in the Recycler and run MI at 1.33sec.  The following steps are needed before we reach the point above:  Reconfigure and commission the MI BLMs to look at both RR and MI losses.  Commission the Recycler longitudinal and transverse dampers.  Finish the RR alignment and optimize the Injection and Extraction Lambertson flanges.  Verify that we can inject (vacuum) and slip stack 2E13 in the Recycler.  Commission the MI collimators Sergei Nagaitsev, Fermilab PAC, Jan ,

Performance Goals for FY14/15  To BNB target (in support of MicroBoone)  FY14: 1.2e19  FY15: 8.4e19  To NuMI target  FY14: 3.2e20  FY15: 3.6e20  To Switchyard (most to SeaQuest)  FY14: 4.5e17  FY15: 1.0e18  Details of calculations in talk by Paul Derwent Sergei Nagaitsev, Fermilab PAC, Jan ,

Operational Statistics – FY14 NuMI POT Integrated – 7.67x10 19 NuMI POT Hours – 1695 hours BNB Test POT Integrated x10 19 BNB Test POT Hours – 1439 hours SY120 Hours – 1196 hours Sergei Nagaitsev, Fermilab PAC, Jan ,

Operational Statistics - NuMI Sergei Nagaitsev, Fermilab PAC, Jan ,

Beam to SeaQuest Experiment Sergei Nagaitsev, Fermilab PAC, Jan , Delivering beam to SeaQuest’s Target since Nov 8 th Continuing to work on Duty Factor for experiment currently ~30%, requesting > 60%

Beam to Fermilab’s Test Beam Facility Sergei Nagaitsev, Fermilab PAC, Jan , FY13-14 scheduled to deliver beam to 20 experiments ranging in intensities and modes.

Meson Center Test Beam  Capable of delivering 5 – 85 GeV/c secondaries of either sign.  Using the same secondary configuration as the MIPP experiment – proven design.  Initial user will be LArIAT (liquid argon detector test).  May be ready to commission in late March.  Shielding Assessment Approved Sergei Nagaitsev, Fermilab PAC, Jan ,

NuMI, NOvA,BNB Horn & Target Spares NuMI Horns – average lifetime so far 3 ½ years  Horn 1 – running PH1-04 (new 700 kw beam horn started Sept. 2013)  PH1-03 (400 kw beam) horn ready spare  PH1-05 (700 kw beam) horn on test stand, estimate complete April/May 2014  PH1-06 have parts to start welding, estimate complete late FY15  Horn 2 – running PH2-02 (installed Dec. 2008)  PH2-03 horn ready spare  PH2-04 in progress, inner conductor welded, estimate complete late FY15 NuMI/NOvA Target – average lifetime previously 1 year, plan for 2/year at 700 kW  Target MET-01 new Sept  MET-03 ready spare  MET-02 nearing completion, estimate March/April 2014(3 Be fins, 47 graphite fins)  Beginning construction of MET-04 & MET-05  Old style 400 kw targets NT-07 and NT-08 available as emergency spares BNB Horn &Target  Present Horn and Target have 1/3 Billion pulses and some water line issues  One Complete Horn and Target spare  Plan on finishing another Horn and Target in FY15 Sergei Nagaitsev, Fermilab PAC, Jan ,

Sergei Nagaitsev, Fermilab PAC, Jan , NOvA target NuMI target (top) must fit inside horn 1 Geometry constrains design. NO v A target (right) upstream of horn 1 (neutrino energy from off-axis angle) Physics requirements allowed for changes in the design mechanically more robust

New Target Facilities of the Next Decade  g-2 (previously P-bar Source Target Station) :  Commissioning in  High-Z rotating target (inconel 718 alloy)  Lithium lens at ~12 Hz (average)  Pulsed Magnet (Momentum selection)  Mu2e  Commissioning in  High-Z, radiatively cooled target (tungsten)  Mounted in large SC solenoid  Only 8 kW beam power, but radiation protection issues are a challenge due to solenoid  LBNE  Commissioning in  1.2 MW beam power  Low-Z target (graphite/beryllium?)  Difficult target, horn, beam window, radiation protection, remote handling challenges. Sergei Nagaitsev, Fermilab PAC, Jan , p-bar lithium lens Mu2e target concept

High Power Targetry (HPT) R&D Program  RaDIATE Collaboration (radiation damage studies)  Radiation Damage In Accelerator Target Environments FNAL, STFC, BNL, Oxford, PNNL currently on MOU  Graphite studies (benefits NuMI-NOvA, LBNE) Samples irradiated and under analysis at BLIP  Beryllium studies (benefits NuMI-NOvA, LBNE, ISIS) RaDIATE post-doc beginning 3 year study at Oxford  Tungsten studies (benefits Mu2e, ISIS, ESS, others) RAL leading effort with Oxford  Titanium alloy studies under consideration  Thermal Shock Studies  Experiment on Beryllium proposed using HiRadMat beam (CERN)  (3) Beryllium fins in NuMI-NOvA Medium Energy Target (MET-02)  Other Efforts to build up HPT infrastructure  Expanding simulation expertise (MARS, ANSYS, LS-DYNA)  Autopsy of spent target components  Remote Handling and Radioactive Component Storage  5 th HPT Fermilab in May, 2014 Sergei Nagaitsev, Fermilab PAC, Jan , irradiated graphite at BLIP (BNL)

Radioactive Component Storage  Recommendations  Upgrade existing Target Service Building to allow efficient & safe storage of small to medium sized components (0.42 M$)  Expand C-0 Remote Handling Facility (C0-RHF) to add storage capacity for large sized components (2.1 M$) Sergei Nagaitsev, Fermilab PAC, Jan ,  Problem identified High intensity operations generate spent radioactive components beyond the current capacity to store/dispose  Task Force formed  Chaired by Stuart Henderson  Created modeling tool to predict impacts of various scenarios  Above actions provide capacity needed for next decade of operations  Consider purpose-built facility (26.9 M$) as component lifetimes and future operational plans are better understood

Shutdown Work – Fall 2014  Present plan is to keep shutdown to 6 weeks with 2 week Accelerator complex restart.  Work list in Back-up slides  Shutdown timing driven by Commonwealth Edison mandatory distribution system work. (345KV lines off site and some on site work.)  2 weeks for Kautz Rd. Substation work  2 weeks for Master Substation work + 1 week for Fermi work.  Master Substation Bypass project completion will happen at A0 during this outage period.  Annual switchgear and feeder maintenance.  Will attempt to do as much as possible before shutdown Sergei Nagaitsev, Fermilab PAC, Jan ,

Muon Campus Program  Provides infrastructure and improvements needed to support both Mu2e and g-2 using former Antiproton-Source infrastructure  Made up of 4 Accelerator Improvement Projects (AIPs) and 3 General Plant Projects (GPPs)  Recycler RF AIP provides rebunching of proton beam for both expts Cooling tests for new 2.5MHz RF cavities based on former MI coalescing cavities  Beam Transport AIP provides extraction from Recycler to Muon Campus beamlines and beamline improvements for 8-GeV beam Install Recycler extraction insert in FY14 shutdown  Delivery Ring AIP provides infrastructure improvements, new injection and abort components to former antiproton Debuncher ring Removing collider equipment to make way for new infrastructure, rerouting controls  Cryo AIP provides cryogenics for Mu2e solenoids and g-2 storage ring Lots of progress, ~25% complete, will be ready to cool g-2 storage ring in FY15  MC-1 Building GPP provides building to house experiment, cryo refrigerators, beamline power supplies – cryo beneficial occupancy, full B.O. this spring  Beamline Enclosure GPP provides tunnel enclosure for new beamlines  MC Infrastructure GPP provides cooling for cryo compressors and extension of MI-52 building needed for new Recycler extraction Sergei Nagaitsev, Fermilab PAC, Jan , Cryo heat exchangers at MC-1 bldg

MC-1 building new beamline to storage ring Delivery Ring (former Antiproton Debuncher) g-2 Accelerator Design  Reusing former Antiproton-Source target station  Upgrading lithium-lens and momentum-selection magnet power supplies to pulse at g-2 repetition rate  Adapting instrumentation to measure low-intensity secondary beam characteristics  Beam tests in progress  Re-designing secondary beamlines to capture as many 3.1-GeV muons from pion decay as possible  Designing new beamline to transport muons to g-2 storage ring Sergei Nagaitsev, Fermilab PAC, Jan ,

Proton Improvement Plan-II Goals Strategy Sergei Nagaitsev, Fermilab PAC, Jan , Proton Improvement Plan-II supports longer term physics research goals by providing increased beam power to LBNE while providing a platform for the future  Design Criteria  Deliver 1.2 MW of proton beam power from the Main Injector to the LBNE target at 120 GeV, with power approaching 1 MW at energies down to 60 GeV, at the start of LBNE operations  Continue support for the current 8 GeV program, including Mu2e, Muon g-2, and the suite of short-baseline neutrino experiments  Provide a platform for eventual extension of beam power to LBNE to >2 MW  Provide a platform for extension of capability to high duty factor/higher beam power operations  Increase Booster/Recycler/Main Injector per pulse intensity by ~50%.  Requires increasing the Booster injection energy  Select 800 MeV as preferred Booster injection energy  30% reduction in space-charge tune shift w/ 50% increase in beam intensity  Provides margin for lower beam loss at higher intensities  Modest modifications to Booster/Recycler/Main Injector  To accommodate higher intensities and higher Booster injection energy  Cost effective solution: 800 MeV superconducting pulsed linac, extendible to support >2 MW operations to LBNE and upgradable to continuous wave (CW) operations  Builds on significant existing infrastructure  Capitalizes on major investment in superconducting rf technologies  Eliminates significant operational risks inherent in existing linac  Siting consistent with eventual replacement of the Booster as the source of protons for injection into Main Injector

Proton Improvement Plan-II Site Layout (provisional) Sergei Nagaitsev, Fermilab PAC, Jan ,

Future Extension Sergei Nagaitsev, Fermilab PAC, Jan ,

Summary  Fermilab came out of major shutdown in position to re- establish the most intense high energy neutrino beam:  Rapidly up to good performance from MI: >250 kW now, >500 kW within the next year (by integrating Reycler)  Upgrades to the Linac, Booster, Recycler, Main Injector, NuMI target hall  Booster neutrino program MicroBooNE  Running beam in support of  High intensity for SeaQuest, TBF, MTA  FY14 long shut down planning started  Focusing on PIP, Muon Campus AIPs, g-2, Mu2e, LBNE and PIP-II (in the future)  Defined performance metrics for support of the experiments, programs, and projects Sergei Nagaitsev, Fermilab PAC, Jan ,

Back-up slides Sergei Nagaitsev, Fermilab PAC, Jan ,

Startup and Operation  Shutdown for ANU installation began Monday, April 30, 2012  November 2012 RFQ startup and commissioning  January 2013 Booster startup and commissioning  Flood at Lab occurred April 17 th & 18 th of 2013  Surge arrestor at Kautz Road SubStation (KRS) fails. Inspection revealed another bad arrestor Sergei Nagaitsev, Fermilab PAC, Jan ,

Startup and Operation - Continued  First Main Injector beam injected & circulated to dump on July 30, 2013  Recycler Lambertson overheated during testing on July 31 st, 2013  First beam to NuMI target on August 5 th, 2013  MI vacuum problem allowed startup but not high intensity running. Shut down to repair it on August 6 th, 2013  MI vacuum problem resolved August 28 th, 2013 Sergei Nagaitsev, Fermilab PAC, Jan ,

Startup and Operation - Continued  Smooth running to NuMI target on September 4 th, 2013  First beam in Recycler on September 13 th, 2013  First beam to Fermilab Test Beamline Facility (FTBF) on September 15 th, 2013 Sergei Nagaitsev, Fermilab PAC, Jan ,

Startup and Operation - Continued  Accelerator Readiness Review (ARR) to allow 700kW Beam operation from October 01 st through October 3 rd, 2013  Fermilab Site Office (FSO) reviewed and approved Accelerator Safety Envelope (ASE) for 700kW operation on November 20 th, 2013  First beam to BNB for Engineering Run on October 22 nd, 2013  November 5 th, 2013 an “alphasorb” wipe was removed from beam line at 308 location in Recycler Sergei Nagaitsev, Fermilab PAC, Jan ,

Startup and Operation - Continued  First beam to SeaQuest on November 8 th, 2013  Slip stacking in Recycler, transfer, and recapture in Main Injector on December 12 th, 2013 (2 batch)  First beam to Muon Campus for studies on January 15 th, 2013 Sergei Nagaitsev, Fermilab PAC, Jan ,

The H- injector Sergei Nagaitsev, Fermilab PAC, Jan ,

Effort to reduce high extractor spark rates: Improved materials (molybdenum inner anode cover plates, tungsten extractor cone tips, titanium outer anode cover plate) New magnets and Yoke Better understanding of Cs flow rates Monitoring of source body and Cs tube temperatures Operations: We have swapped sources 3 times with practice could be <20min Tried several combinations of tuning parameters Source A LEBT vacuum problems Keeping gas pressure constant is a problem Piezo valve is effected by ambient temperature. Inserted trim magnet DS of RFQ. RFQ Injector Line Ongoing projects: Gas valve replacement 2 stage extraction DTI extractor pulsers Fiber optic links to HV rack Spectrometer looking at Cs to H ratio Cs handling (change boiler to accept Cs without ampule) Better heaters (right now the heaters are too interactive) Current regulated arc modulator Optical spectrometer installed for Cs monitoring in the plasma. Will be operational soon. Sergei Nagaitsev, Fermilab PAC, Jan ,

Increased arc current to `20A Onset of sparking caused by gas pressure Able to recover Source B running well for 40 days with very little sparking < 2 sparks a day. Higher arc current, cathode and body temps Lower gas pressure Operations since last May Shows that we have used both sources Lots of extractor sparking initially Note: HRM resets represent extractor sparks Yellow = Source BGreen = Source A Beam currents RFQ Injector Line Sergei Nagaitsev, Fermilab PAC, Jan ,

BEAM TO MTA HALL (more tuning necessary) Sergei Nagaitsev, Fermilab PAC, Jan ,

Shutdown FY14: Recycler Work  Recycler  Install P1 line – approximately 6 weeks but very tight  Install 53Mhz RF cavity (#3)  Install 9 new trim quads for phase trombone  Increase machine aperture: flanges at MI-30 Lambertson, MI-30 2” -> elliptical pipe, MI-20 microwave detectors.  Install Recycler MI-30 Ion Profile Monitor  Install larger pipe at MI-30 to increase aperture. Sergei Nagaitsev, Fermilab PAC, Jan ,

Main Injector Work cont.  Install MI-30 Main Injector Ion Profile Monitor  Install new DC Current Transformer at MI-62  Install MI-30 automatic vacuum valves to protect the Main Injector Lamberson.  Note: MI-30 is one of the traditionally hot areas so all work must be covered by a very through ALARA radiation plan (As Low As Reasonably Achievable) Sergei Nagaitsev, Fermilab PAC, Jan ,

Current Recycler RF cavity installation Sergei Nagaitsev, Fermilab PAC, Jan ,

Maintenance work  Linac  Work list being developed  Booster  Install 24 turbo pumps and associated cabling.  Replace 5 vacuum valves  Repair vacuum leak in 802 area, IP3-1, and IP4-IP5 area.  Clean and dust tunnels prior to restart.  Additional work includes normal vacuum, water, electrical and controls maintenance. Sergei Nagaitsev, Fermilab PAC, Jan ,

Important Safety Task  An electrical shock incident caused the Accelerator Division to inspect all area’s under our control for cables that may fall against the magnet buss. The clean up of these cables is an on-going task but will be a major component of the shutdown work. Cables will be removed or properly restrained in all tunnel areas to preclude future incidents. Sergei Nagaitsev, Fermilab PAC, Jan ,