Fermi National Laboratory


2007 Accelerator Update Archive

December 21, 2007 - December 31, 2007
- One store with an initial luminosity of 193.22E30 was established on 12/31/07
- TeV helium leak leads to replacing TeV dipole magnet at sector A4
- Linac repairs nitrogen leaks on vacuum valves
- MI found and replaced some bad beam pipe
- Pbar repairs problem with lithium lens

December 19, 2007 - December 21, 2007
- Three stores provided 21 hours and 37 minutes of luminosity
- Experts prepare Switchyard and MTest for next user
- Booster experts increase beam intensity
- Power glitch trips off vacuum pump and causes quench
- Operations hopes your holidays are bright and full of cheer

December 17, 2007 - December 19, 2007
- Two stores provided 45 hours and 32 minutes of luminosity
- Feeder 36 fault found
- Pbar vacuum leak found and fixed

December 14, 2007 - December 17, 2007
- Five stores provided 45 hours and 56 minutes of luminosity
- Two TeV stores reach luminosities of 210.5 and 211E30

December 12, 2007 - December 14, 2007
- Two stores provided 29 hours and 39 minutes
- Linac Momentum dump vacuum capped
- Cryo experts complete repair on C4 cold compressor
- Duty Electrician finds and replaces very old Linac breaker

December 10, 2007 - December 12, 2007
- Three stores provided 35 hours and 1 minute of luminosity
- Fixed target areas recover from power glitches
- Experts confirm Linac Momentum dump vacuum bad
- Meson MTest T976 begins taking beam

December 7, 2007 - December 10, 2007
- Three stores provided 53 hours and 55 minutes of luminosity
- Recycler conducts electron cooling drag rate measurements
- Linac adds vacuum pump and resumes sending beam
- Linac experts fix low level RF problem
- Duty Mechanic repairs F4 LCW pump
- Cryo repairs C2 wet engine
- Switchyard experts prepare MTest for next experiment, T970

December 5, 2007 - December 7, 2007
- One store provided 32 hours and 32 minutes of luminosity
- Booster replaces weak RF Power Amplifiers
- Linac replaces Klystron flow turbines
- Wire scanner (cause of Linac vacuum problems) removed

December 3, 2007 - December 5, 2007
- One store provided 9 hours and 6 minutes of luminosity
- A3 thermometry crate repaired
- MI ground fault due to cable
- Linac vacuum leak found

November 30, 2007 - December 3, 2007
- Three stores provided 31 hours and 45 minutes of luminosity
- MI conducts aperture scans and slipstacking studies
- Pbar sets stacking record with 24.30 mA for an hour
- Vacuum leak fixed in TeV sector D17
- TeV collimator skew corrected
- New Recycler damper system implemented

November 28, 2007 - November 30, 2007
- Two stores provided 16 hours and 15 minutes of luminosity
- Vacuum leak successfully repaired in F11
- Controls experts resolve clock problems
- Pbar set new stacking record with a rate of 23.87 mA per hour
- D0 and CDF making 2 - 4 hour access today (11/30/07)

November 26, 2007 - November 28, 2007
- Two stores provided 28 hours and 23 minutes of luminosity
- Pbar sets new stacking record with a rate of 23.22E10 for one hour
- C4 wet engine repaired faster than estimated

November 21, 2007 - November 26, 2007
- Six stores provided 62 hours and 59 minutes of luminosity
- NuMI repairs water skid and resumes taking beam
- CDF repairs COT
- TeV conducts maintenance during CDF access

November 19, 2007 - November 21, 2007
- Two stores provided 27 hours and 33 minutes of luminosity
- NuMI resumes taking beam
- The TeV, MI, Pbar, and Booster all get study time
- CDF may be allowed an 8-12 hours access on 11/23/07

November 16, 2007 - November 19, 2007
- Four stores provided 49 hours and 56 minutes of luminosity
- Recycler beam valve repaired
- Recycler experts revert to old damper system
- NuMI resumes taking beam
- Kicker problem halts NuMI beam

November 14, 2007 - November 16, 2007
- Two stores provided 32 hours and 30 minutes of luminosity
- TeV conditions separators
- MI repairs bus LCW leaks
- Pbar sets record with a 271mA stack
- Experiment T972 moves from Pbar to MINOS
- NuMI might resume taking beam on 11/17/07

November 12, 2007 - November 14, 2007
- Two stores provided 17 hours and 57 minutes of luminosity
- TeV A0 nitrogen DEWAR gets deliveries every day
- Latest Meson MTest experiment completed
- TeV conditions its separators
- Pbar sets stacking record with 260 mA and rising

November 9, 2007 - November 12, 2007
- Two stores provided 21 hours and 27 minutes of luminosity
- Cryo Coordinator diverts nitrogen delivery to fill empty A0 DEWAR
- Accesses across the complex to restart vacuum pumps and check LCW and vacuum valves
- Experts help operators turn on Pelletron

November 7, 2007 - November 9, 2007
- B0 magnet moves completed
- New MTest experiment gets beam
- TeV begins tuning accelerator
- Operations manages many LCW and vacuum valve closures

November 5, 2007 - November 7, 2007
- Linac LCW leak found on LRF3 cavity, not in penetration
- Aborted store did not quench TeV or damage CDF detector
- Switchyard vacuum leak found
- Shutdown allows maintenance work many machine studies
- The sector B0 low beta magnet moves continue

November 2, 2007 - November 5, 2007
- Four stores provided 36 hours and 2 minutes of luminosity

October 31, 2007 - November 2, 2007
- Three stores provided 25 hours and 13 minutes of luminosity
- D0's interaction point was "spot on"
- 12 hour or more shutdown next week

October 29, 2007 - October 31, 2007
- Two stores provided 24 hours and 59 minutes of luminosity
- NTF treats patients

October 25, 2007 - October 26, 2007
- FESS switched Pbar 95 LCW pumps
- Meson MTest had safety walkthrough
- Pbar reported good stacking efficiency

October 24, 2007 - October 25, 2007
- Tevatron conducting studies
- Pbar momentum cooling rephased
- Beam to Switchyard and Meson M01

October 23, 2007 - October 24, 2007
- Complex in access
- D0 completed detector repairs
- Switchyard receives permission to take beam

October 22, 2007 - October 23, 2007
- Recycler stashed
- Antiprotons successfully injected into the TeV
- D0 conducting 12-16 hour access to repair detector
- Accelerators in access for maintenance and repairs

October 19, 2007 - October 22, 2007
- Recycler stashed antiprotons
- Electron Cooling studies
- TEL1 used to scrub abort gap
- Sci/MiniBooNE taking beam
- D0 to make 12-16 hour access on 10/23/07

October 18, 2007 - October 19, 2007
- Two Pbar magnet leaks were repaired
- Pbar stacked
- TeV accelerated a proton beam to 980 GeV
- MI established an 8 and 120 GeV beam

October 17, 2007 - October 18, 2007
- TeV access to adjust lead flows
- TeV injected reverse protons
- Pbar has Debuncher momentum cooling problems
- Recycler conducts Electron Cooling and proton studies

October 16, 2007 - October 17, 2007
- Tevatron quenches
- Beam injected into the TeV
- Pbar stacks antiprotons
- Linac has RF (LRF2) problems
- D0 needs 8-10 hour access

October 15, 2007 - October 16, 2007
- Tevatron cryo system cold
- TeV receives permission to run beam
- MiniBooNE/SciBooNE ready for beam
- Pbar sends beam to Accumulator and Debuncher
- Recycler ready for antiprotons
- D0 must open detector - 8 hour job

October 12, 2007 - October 15, 2007
- Linac, Booster, Main Injector, Antiproton Source, and MiniBooNE all get beam
- Linac access to repair vacuum leak
- TeV access to check cryo and complete small job in E1
- CDF and D0 accesses to complete some work
- D0 ready for beam
- CDF muon walls still open
- Once the TeV gets cold, experts will establish beam

October 5, 2007 - October 12, 2007
- Shutdown work finishing and startup beginning
- For an excellent summary of where we are now (10/12/07) read the read the Run Coordinator's Summary in this report
- This is the last shutdown report. Regular reports will begin next week on Monday

September 28, 2007 - October 5, 2007
- LINAC is up an running.
- Booster may take beam this weekend.
- Tevatron - Found and repaired many vacuum leaks.
- NuMI - Installation of dehumidifier system continues and repair of Horn 2 will take place this weekend.

September 21, 2007 - September 28, 2007
- LINAC - NTF starts up tonight
- Tevatron - Found and repaired many vacuum leaks
- NuMI - Installation of dehumidifier system continues
- LINAC and Booster are scheduled to begin turn on next week

September 14, 2007 - September 21, 2007
- Recycler - Two vacuum leaks were found and fixed
- Tevatron - The magnet unrolls were completed
- Safety - The Linac enclosure interlock work was completed
- NuMI - The HV101-1 magnet was repaired
- CDF - East end plug closed
- Controls - There will be *NO CONTROL SYSTEM* from 7 AM Saturday (9/22) to Sunday evening (9/23)

September 7, 2007 - September 14, 2007
- MuCool - Electrical work and alignment behind schedule
- Main Injector - Has general startup plan
- TeV - Vacuum issues
- Recycler - Found the cause of vacuum bursts
- CDF - Will close end plug next week
- Alignment - Completed a 100+ rolls in the Tevatron

August 31, 2007 - September 7, 2007
- Linac: I- Dome power trouble
- Booster: Cable pulls done
- Recycler: New DCCT section installed and under vacuum
- NuMI: Drain cleaning complete n all underground areas
- MuCool: Shielding under hatch complete

August 24, 2007 - August 31, 2007
- Booster: cable pulls complete
- MI: collimator work 45% complete
- TeV: A1 warmed up to look for leaks
- NuMI: target pile chiller maintenance complete
- FESS: 18 of 19 poles installed

August 17, 2007 - August 24, 2007
- Shutdown summary

August 10, 2007 - August 17, 2007
- Shutdown summary

August 6, 2007 - August 10, 2007
- Shutdown work begins – Week one of ten weeks
- A large crane will be taking up 20 parking spots next week while it assists in the MTA beamline installation just off of Linac

August 3, 2007 - August 6, 2007
- Two stores provided 29 hours and 13 minutes of luminosity
- Linac had quadrupole problems
- Kautz Road Substation has planned shutdowns
- TeV quenched during pre-shutdown studies
- 10 week shutdown begins

August 1, 2007 - August 3, 2007
- Two stores provided 44 hours and 49 minutes of luminosity
- CDF fixes SVX high voltage problem
- MI has power supply trouble (HT828)
- MiniBooNE horn trips

July 30, 2007 - August 1, 2007
- Two stores provided 43 hours and 14 minutes of luminosity
- Shutdown intensity reduction begins
- CDF has beam monitor power supply problem
- DRF1 has ramp card trouble

July 27, 2007 - July 30, 2007
- Three stores provided 59 hours and 4 minutes of luminosity
- LRF3 power amplifier tube replaced
- Recycler reestablishes their new damper system
- Part of CDF detector trips off
- Recycler stash lost during control card change
- I- Source has cooling problem

July 25, 2007 - July 27, 2007
- Two stores provided 28.75 hours of luminosity.
- Tevatron Quench

July 23, 2007 - July 25, 2007
- Two stores provided 23 hours and 15 minutes of luminosity
- P1 transfer line trips
- TeV quench
- 20mA of stash lost
- BRF13 LCW leak

July 20, 2007 - July 23, 2007
- Two stores provided 47 hours and 36 minutes of luminosity
- E4 wet engine replaced
- Operators switched to the H- Source
- 23E10 of antiprotons lost from Recycler
- Store 5567 aborted

July 18, 2007 - July 20, 2007
- Two stores provided 34 hours and 17 minutes of luminosity
- Power glitch due to thunderstorm trips off devices
- LRF3 problems after power glitch
- Energy mismatch between MI and Recycler found 6

July 16, 2007 - July 18, 2007
- Three stores provided 28 hours and 40 minutes of luminosity
- Store 5554 quenched
- NuMI horn has LCW leak - NuMI off until after shutdown
- Booster RF problem
- A1, P1, and F0 vacuum burst
- Summer shutdown begins August 6

July 13, 2007 - July 16, 2007
- Four stores provided 59 hours and 18 minutes of luminosity
- MTest held off due to HP3US transformer failure
- LRF3 tripped off on vacuum inhibit

July 11, 2007 - July 13, 2007
- One store provided 54 minutes of luminosity
- Feeder 89-1 tripped off due to power supply

July 9, 2007 - July 11, 2007
- Two stores provided 43 hours and 9 minutes of luminosity
- Booster vacuum gauge causes GMPS trips
- MIRF11 trips cause NuMI trips
- MT5Q2 holds off MTest
- ARF4 problems

July 6, 2007 - July 9, 2007
- Four stores provided 65 hours and 8 minutes of luminosity
- MI abort kickers still tripping
- Power glitch knocks off Linac, Booster, and MI RF - stash, stack, and store survive
- Stack lost
- TEL2 trips off
- Meson M02-5 interlock problems

July 4, 2007 - July 6, 2007
- Two stores provided 22 hours and 10 minutes of luminosity
- MI suffering from kicker trips
- Recycler looses small portion of stash
- Recycler has emittance problems
- TeV quench during study
- H- Source output dropping

July 2, 2007 - July 4, 2007
- Three stores provided 42 hours and 36 minutes of luminosity
- Switchyard has QXR trouble
- Pbar lithium lens trip
- Recycler has electron Cooling problem

June 29, 2007 - July 2, 2007
- Four stores provided 58 hours and 23 minutes of luminosity
- TeV D1 and F4 wet engine problems
- Lithium lens trips off

June 27, 2007 - June 29, 2007
- Two stores provided 25.5 hours of luminosity.
- Lightning strike delays shot setup.
- MTest once again taking beam.

June 25, 2007 - June 27, 2007
- One store provided 19 hours of luminosity.
- Tevatron Quench.
- Tev water leak in PBar Pre-Vault enclosure.

June 22, 2007 - June 25, 2007
- Three stores provided 53 hours and 30 minutes of luminosity
- Tevatron Quench
- AP2 vacuum leak

June 20, 2007 - June 22, 2007
- Two stores provided 38 hours and 55 minutes of luminosity
- MTest area ready and waiting for it next user
- Booster High Level RF monitor trip
- NuMI horn trip due to flake of paint

June 18, 2007 - June 20, 2007
- Four stores provided 23 hours and 30 minutes of luminosity
- Store 5501 quenched
- Humidity causes MI abort

June 15, 2007 - June 18, 2007
- Three stores provided 56 hours and 45 minutes of luminosity.
- MI and Debuncher kicker problems.
- High temperature problems on MI water systems.
- 144e10 lost in the stash.

June 13, 2007 - June 15, 2007
- Two stores provided 23 hours and 4 minutes of luminosity
- MI kicker problems continue
- MI RF LCW leak discovered
- Store 5492 quenched
- Pbar had trouble stacking
- A2 cryo system delayed TeV ramp

June 11, 2007 - June 13, 2007
- Three stores provided 26 hours and 37 minutes of luminosity
- Store 5485 lost due to A0 breaker trip
- MI suffers from kicker trips

June 8, 2007 - June 11, 2007
- Four stores provided 60 hours and 53 minutes of luminosity
- Recycler stash lost
- MI kicker problems

June 6, 2007 - June 8, 2007
- Two store provided 29 hours and 37 minutes of luminosity
- BRF18 problem lowered Booster intensity for about 10 hours
- KRF3 had phase problems

June 4, 2007 - June 6, 2007
- Two stores provided 39 hours and 5 minutes of luminosity
- Pbar experts conduct equalizer studies
- MIPS loop trips causes loss of antiprotons from stash
- TeV quench during shot setup
- TeV A4 air compressor motor fails

June 1, 2007 - June 4, 2007
- Three stores provided 69 hours and 21 minutes of luminosity
- Switchyard ODH alarms due to high humidity
- Linac has trouble with KRF2
- Booster RF problems

May 30, 2007 - June 1, 2007
- Three stores provided 43 hours and 10 minutes of luminosity
- Booster GMPS trips off
- MI VCBs open
- TEL2 has problem

May 28, 2007 - May 30, 2007
- Two store provided 39 hours and 47 minutes of luminosity
- MI-10L PS VCB disabled - MI-20L PS VCB brought online
- More MI and MiniBooNE beam conflicts

May 25, 2007 - May 29, 2007
- Three stores provided 43 hours and 32 minutes of luminosity
- MiniBooNE turned off during antiproton injection to TeV due to MI aborts
- Network storms cause ACNET problems
- H- Source driver power supply replaced
- Recycler stash lost twice
- MI trip causes partial loss of stash

May 23, 2007 - May 25, 2007
- Two stores provided 45 hours and 35 minutes of luminosity
- Lithium Lens develops leak
- LRF3 driver fails

May 21, 2007 - May 23, 2007
- Three stores provided 34 hours and 13 minutes of luminosity
- Preaccelerator switches to H- Source
- TeV aborted - no beam
- Antiproton target position moved
- TeV quenched with only protons

May 18, 2007 - May 21, 2007
- Four stores provided 28 hours and 50 minutes of luminosity.
- I- Source sparking
- Pbar's Lithium Lens transformer fails
- Store 5437 aborted
- MiniBooNE pump fails
- TeV quenches during study
- Store 5444 aborted
- Linac quadrupole power supply problems
- TeV C2 power supply problems
- I- Source water resistor problems

May 16, 2007 - May 18, 2007
- One store provided 11 hours and 45 minutes of luminosity
- LRF3 power amplifier changed
- Recycler lost half of its stash due to a power supply
- Pbar uses new helix to stash antiprotons
- Booster beam valve closes

May 14, 2007 - May 16, 2007
- Two stores provided 27 hours of luminosity
- Pelletron problems
- MTest (T963) completes their test run at Fermi
- I- Source power supply trips off
- CDF access to fix silicon cooling

May 11, 2007 - May 14, 2007
- Three stores provided 55 hours and 10 minutes of luminosity
- TeV conducts destructive end-of-store study
- Two transfers lost during stash
- ORBUMP power supply fails

May 9, 2007 - May 11, 2007
- One store provided 15 hours and 12 minutes of luminosity
- Pbar conducts reverse proton studies
- Required Safety system testing was completed
- 140 maintenance jobs and several studies were successfully coordinated around the safety system tests

May 7, 2007 - May 9, 2007
- Two stores provided 42 hours and 37 minutes of luminosity
- Cryo repairs B0 wet engine
- Recycler power supply springs leak
- Recycler reverts to old damper system
- Safety system testing begins on Thursday, 5/10/07
- Check the Run Coordinator's log for a schedule of events

May 4, 2007 - May 7, 2007
- Four stores provided 64 hours and 18 minutes of luminosity
- E0 cold compressor problems
- Recycler power supply springs leak
- LRF3 fails

May 2, 2007 - May 4, 2007
- Two stores provided 31 hours and 13 minutes of luminosity
- New MTest experiment begins (T963)
- Linac has LRF4 and KRF3 problems
- Recycler reverts to old damper board

April 30, 2007 - May 2, 2007
- One store provided 24 hours and 54 minutes of luminosity
- TeV quench due to separator spark - no beam
- TeV QPM problem
- Lithium lens power supply voltage re-taped

April 27, 2007 - April 30, 2007
- Four stores provided 50 hours and 49 minutes of luminosity
- Store 5379 quenched
- Many Lithium Lens power supply trips due to over temperature
- Pbar Debuncher cooling problem - tunnel access needed
- Booster damper trip
- Store 5384 aborted due to lightning glitch

April 25, 2007 - April 27, 2007
- Three stores provided 35 hours and 13 minutes of luminosity
- Pbar's Lithium Lens power supply over heats
- Stuck LCW valve on KRF3 halts beam
- Store 5376 aborted

April 23, 2007 - April 25, 2007
- Three stores provided 39 hours and 55 minutes of luminosity
- Pbar transport magnet has hose leak
- Sinkhole found near AP0 service building
- Linac has KRF4 problems
- TeV separator (A49) trouble
- MTest T967 completes run
- MIRF9 trip causes NuMI trip

April 20, 2007 - April 23, 2007
- Three stores provided 57 hours and 18 minutes of luminosity
- LRF2 required more work
- Store 5366 quenched due to separator spark
- MECAR problems causes MI trouble

April 18, 2007 - April 20, 2007
- Two stores provided 34 hours and 2 minutes of luminosity
- New MTest experiment begins: T967
- Lithium lens power supply trips
- LRF2 requires more work
- TeV store 5358 quenches
- ARF4 fails - ARF3 takes its place

April 16, 2007 - April 18, 2007
- Two stores provided 33 hours and 20 minutes of luminosity
- Linac repairs KRF4
- Stash lost due to power glitch
- Fire alarms clear out MCR

April 13, 2007 - April 16, 2007
- Four stores provided 55 hours and 9 minutes of luminosity
- MiniBooNE auto tune problems
- I- Source extractor power supply fails
- TRF7 trips
- Recycler has damper problems

April 11, 2007 - April 13, 2007
- Two stores provided 36 hours and 47 minutes of luminosity
- LRF2 has station and water pump problems
- MI-20L power supply fails
- TeV detects earthquake in Mexico

April 9, 2007 - April 11, 2007
- TeV A2 wet engine required repair
- MiniBooNE pulsed its horn
- Linac suffers many LRF2 trips
- MiniBooNE resumes taking beam
- Accumulator kicker problems
- MTest (T964) completes its run
- ComEd power glitch aborts store 5345

April 6, 2007 - April 9, 2007
- Four stores provided 40 hours and 47 minutes of luminosity
- Operations begins running MiniBooNE power supplies
- Store 5339 aborted

April 4, 2007 - April 6, 2007
- One store provided 26 hours and 32 minutes of luminosity
- MTest T964 resumes taking beam
- Stash lost

April 2, 2007 - April 4, 2007
- One store provided 18 hours and 28 minutes of luminosity
- MTest T950 experiment completes its run
- Preaccelerator switched to the I- Source
- Recycler had emittance problems
- 13-hour shutdown for CDF on 4/3/07
- TeV store quenches during squeeze

March 30, 2007 - April 2, 2007
- Two stores provided 33 hours and 18 minutes of luminosity
- TeV suffers two quenches, store 5315 lost
- Booster and Pbar have kicker problems
- H- Source trips continue
- TeV sector B3 bus work cabinet faulted
- 12 hour shutdown for CDF on 4/3/07

March 28, 2007 - March 30, 2007
- Two stores provided 32 hours and 34 minutes of luminosity
- MS2 looses power for 30 minutes
- Power loss in TeV sector A50 due to ground water last 9.5 hours
- H- Source vacuum gauge problems
- TeV F4 quench ends store 5306

March 26, 2007 - March 28, 2007
- Two stores provided 44 hours and 18 minutes of luminosity
- TEL1 power supply LCW leak
- NuMI held off 3 hours due to power supply and broken air conditioning
- Pbar target rotation problems
- MTest experiments end their run

March 23, 2007 - March 26, 2007
- Four stores provided 59 hours and 17 minutes of luminosity
- Recycler suffered from transverse cooling problems
- Preaccelerator 750 KeV area buncher trips
- MTest began running 8 GeV beam
- Store 5297 quenched
- Recycler conducts electron cooling alignment
- MI and Booster suffer many trips due to high temperature in Booster LLRF room

March 21, 2007 - March 23, 2007
- Two stores provided 36 hours and 55 minutes of luminosity
- Pbar continues with stack tail equalizer studies
- TeV quench
- New MTest experiments (T950 & T964) begin taking beam

March 19, 2007 - March 21, 2007
- Two stores provided 41 hours and 6 minutes of luminosity
- Booster RF station 18 sparking - bypassed
- Pbar AP3 LCW leak - repaired
- Store 5292 low luminosity
- Pelletron LCW leak - repaired

March 16, 2007 - March 19, 2007
- Three stores provided 60 hours and 16 minutes of luminosity
- NuMI finds their LCW leak in MI-65
- LRF4 down for six hours
- H- Source sparking
- TeV tune trouble
- Pbar target motor fails
- Pbar begins 8-hour equalizer study

March 14, 2007 - March 16, 2007
- Three stores provided 38 hours of luminosity
- Water leak on ECool Chiller
- access for Booster RF problems

March 12, 2007 - March 14, 2007
- Three stores provided 26 hours and 25 minutes of luminosity
- Feeder repairs held off TeV on Monday
- LRF3 and 4 cause Linac problems
- H- Source Sparking
- Booster access Wednesday afternoon to repair RF

March 9, 2007 - March 12, 2007
- Three stores provided 53 hours and 23 minutes of luminosity
- Pbar tuning program needed reseting
- Pelletron suffers from communications problem
- TeV quenched just before store was to be established
- TeV and Pbar conduct four hours of maintenance on Monday

March 7, 2007 - March 9, 2007
- Two stores provided 44 hours and 44 minutes of luminosity
- Pbar conducting reverse protons studies
- NuMI conducting 11 batch slipstacking studies
- Feeder work on Monday will hold off beam in TeV

March 5, 2007 - March 7, 2007
- Two stores provided 35 hours and 53 minutes of luminosity
- NuMI conducts 11 batch slipstacking studies
- Pbar target rotation repaired
- Pbar PreVault LCW leak found and repaired
- TeV suffers proton coalescing problem

March 2, 2007 - March 5, 2007
- Three stores provided 47 hours and 55 minutes of luminosity
- Meson experts conduct calibration foil tests
- TeV ground fault resolved
- LRF4 & 5 repaired
- Store 5259 aborted
- Pbar target stops rotating

February 28, 2007 - March 2, 2007
- One store provided 15 hours and 52 minutes of luminosity
- Two stores, just moments away from being established, were lost due to tune problems

February 26, 2007 - February 28, 2007
- Two stores provided 39 hours and 47 minutes of luminosity
- Recycler cooling delays shot
- NuMI horn problems

February 23, 2007 - February 26, 2007
- Three stores provided 61 hours and 3 minutes of luminosity
- LRF5 repaired
- MI thermocouple problems
- MTest experimenters complete their tests
- NuMI has kicker temperature trouble
- Store 5245 sets record with a luminosity of 292.26E30

February 21, 2007 - February 23, 2007
- Three stores provided 34 hours and 10 minutes of luminosity
- ComEd power glitch causes quench and the loss of store 5238
- Feeder 32 fault causes CHL nitrogen plant to trip
- MTest (T953) begins taking beam

February 19, 2007 - February 21, 2007
- Two stores provided 35 hours and 56 minutes of luminosity
- Electron Cooling problems delay shot
- Accumulator kicker causes the loss of three transfers

February 16, 2007 - February 19, 2007
- Two stores provided 49 hours and 21 minutes of luminosity
- LRF3 water skid trouble
- Store 5231 lost due to quench at B0
- TeV BPM VME problems
- Store 5234 sets New Record Luminosity of 285.03E30

February 14, 2007 - February 16, 2007
- Two stores provided 36 hours and 19 minutes of luminosity
- H- Source suffered from sparking and intensity problems
- ACNET trouble due to bug in BPM program
- TeV powers supplies trip due to LCW leak
- Store 5229 quenched due to LCW leak

February 12, 2007 - February 14, 2007
- MI trips linked to H- problems
- NuMI trips linked to H- problem and auto-tune bug
- LRF3 water skid power supply failed
- Store 5226 set Record Luminosity with 284.3E30
- Store 5226 lost due to quench

February 9, 2007 - February 12, 2007
- Two stores provided 45 hours and 23 minutes of luminosity
- NuMI suffered from bad beam position problems
- MI sets intensity record of 3.5E10 protons at 120 GeV
- Recycler has trouble with Electron Cooling
- D0 needs access to investigate Sunday trips

February 7, 2007 - February 9, 2007
- Three store provided 35 hours and 59 minutes luminosity
- Booster troubled by BRF6 trips
- Store 5218 aborted - no quench
- Recycler has electron cooling problem
- Linac KRF6 looses phase lock

February 5, 2007 - February 7, 2007
- Two stores provided 29 hours and 51 minutes of luminosity
- Feeder 36 trip due to oil leak
- Pbar and Recycler have kicker problems
- Booster RF failures requires tunnel access
- MCR suffers from controls problems

February 2, 2007 - February 5, 2007
- One store provided 13 hours and 8 minutes of luminosity
- Recycler had stochastic cooling problems
- TeV sextupoles commissioned and operating
- MI controls developed serial link driver problems
- Store 5208 aborted
- TeV and Recycler have kicker troubles

January 31, 2007 - February 2, 2007
- One store provided 3 hours and 26 minutes of luminosity
- Store 5201 aborted due to RF trip
- TeV sector A1 suffers vacuum problems
- TeV sectors A1, 2, & 3 cryo systems warmed up
- H- Source intensity drops slightly

January 29, 2007 - January 31, 2007
- Two stores provided 41 hours and 48 minutes of luminosity
- MI/Recycler and NuMI off for HV101 replacement
- Store 5199 lost due to quench
- Store 5201's luminosity of 278.08E30 set New Record

January 26, 2007 - January 29, 2007
- Three stores provided 67 hours and 40 minutes of luminosity
- Beam commissioning to the Meson MTest area
- NuMI magnet HV101 developed LCW leak
- Linac Klystron Debuncher LCW pump failed
- MIRF10 trips
- NuMI LCW leak found in MI-60
- MI, Pbar, SY, and NuMI off on Tuesday through Friday to replace HV101

January 24, 2007 - January 26, 2007
- Two stores provided 23 hours and 18 minutes of luminosity
- D-Zero needed a 10 hours access to make detector repairs
- All the accelerators except MI and Recycler, used this time for maintenance
- Pbar replaced a magnet and its antiproton target

January 22, 2007 - January 24, 2007
- Two stores provided 26 hours and 32 minutes of luminosity
- H- Source water resistor replaced
- Slow spill to Meson
- Feeder 36 faults cause three power glitches

January 19, 2007 - January 22, 2007
- Four stores provided 57 hours and 52 minutes of luminosity
- MI has RF, vacuum, and beam position problems
- Recycler emittance trouble
- Linac had LRF2 trouble
- Sparking limits the H- Source output
- TeV B17 separator fails

January 17, 2007 - January 19, 2007
- Three stores provided 39 hours and 6 minutes of luminosity
- NuMI LCW system leak not in NuMI tunnels
- TeV ramp lost due to lead flow - no quench
- Store 5189 set record with an initial luminosity of 277.57E30

January 15, 2007 - January 17, 2007
- Three stores provide 34 hours and 37 minutes of luminosity
- Store 5177 quenched
- Store 5179 aborted
- NuMI trips due to ground faults and beam position problems

January 12, 2007 - January 15, 2007
- Four stores provided 65 hours and 10 minutes of luminosity
- Store 5175 set record with a luminosity of 258.23E30
- Beam sent to M01
- NuMI horn and beam permit problems
- Earthquake S-SW of Kuril Islands
- Pelletron vacuum and Electron cooling troubles

January 10, 2007 - January 12, 2007
- Two stores provided 41 hours and 20 minutes of luminosity
- MI SA power supply current monitor failing
- TeV develops LCW leak
- Meson to take beam to MO1 this weekend

January 8, 2007 - January 10, 2007
- Three stores provided 26 hours and 30 minutes of luminosity
- Store 5166 set a record with a luminosity of 151.79E30
- Store 5166 aborted due to power supply trip
- Pbar shutter problems hinder stashing

January 5, 2007 - January 8, 2007
-Three stores provided 63 hours and 53 minutes of luminosity
- Pbar needed access to repair equipment
- MI-60 power supply leak needs day to repair

January 3, 2007 - January 5, 2007
- Three stores provided 42 hours and 7 minutes of luminosity
- MiniBooNE still off for absorber work

December 21, 2006 - January 3, 2007
- 13 stores provided luminosity to the experiments
- Store 5155 set a luminosity record with 248.2E30
- 3 quenches occurred with 2 ending stores
- NuMI turned off for absorber work

[an error occurred while processing this directive]

More Information
For Tevatron luminosity charts and the current status of Fermilab's accelerators and detectors (live!), please go to Fermilab Now

Comments and Suggestions
What do you think about the Accelerator Updates? Please send comments and suggestions to: accelupdates@fnal.gov.


Return to Current Accelerator Update



last modified 12/28/2011    email Fermilab
Security, Privacy, LegalFermi National Accelerator Laboratory