J T Volk Fermilab April 2008 Ground Motion Studies at Fermi National Accelerator Laboratory James T...
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Transcript of J T Volk Fermilab April 2008 Ground Motion Studies at Fermi National Accelerator Laboratory James T...
J T Volk Fermilab April 2008
Ground Motion Studiesat Fermi National Accelerator
Laboratory
James T VolkApplications Physicist II
Vladimir Shiltsev, Shavkat Singatulin
J T Volk Fermilab April 2008
Fermilab
• 40 miles due west of Chicago Illinois
• World’s highest energy particle accelerator
• Site is 6800 acres, 10 sections, 2752 hectares
• The Tevatron 1 km radius tunnel 30 feet below surface
• Protons and anti protons collide at center of mass energy of 1.9 Tev
• Beam size is 0.1 mm
• Cultural noise is an issue
J T Volk Fermilab April 2008
Fermilab
• World’s highest energy particle accelerator
• Site is 6800 acres 10 sections 2752 hectares
• The Tevatron 1 km radius tunnel 30 feet below surface
• Protons and anti protons collide at center of mass energy of 1.9 Tev
• Beam size is 0.025 mm
• Cultural noise is an issue
Tevatron 1 km radius
J T Volk Fermilab April 2008
Fermilab
• World’s highest energy particle accelerator
• Site is 6800 acres 10 sections
• The Tevatron 1 km radius tunnel 30 feet below surface
• Protons and anti protons collide at center of mass energy of 1.9 Tev
• Beam size is 0.025 mm in diameter
• Cultural noise is an issue
EJ&E rail road
J T Volk Fermilab April 2008
Future projects at Fermilab
Project X is an 8 GeV Linear Accelerator To replace old LINAC And booster
Muon Collider is a High intensity muon andNeutrino facility
J T Volk Fermilab April 2008
International Linear Collider
Two linear accelerators each 15 miles long colliding electrons and anti electrons.Beam size nanometers (10-9 meters). Cultural and natural sources of noise willcause problems such as beam dispersion and lower luminosity (particles /cm2 sec).Two tunnels are proposed one for the accelerator and the other for power supplies.The US proposed site is at Fermilab in Illinois.
J T Volk Fermilab April 2008
Ground motion at Fermilab
All these accelerators andDetectors are sensitive toCultural noise traffic, HVAC,water, and, vacuum pumps.
Natural noise tides, earth quakesmotion due to ground water
J T Volk Fermilab April 2008
Simple HLS system
h1
h2
J T Volk Fermilab April 2008
Simple HLS system
h1
h2
J T Volk Fermilab April 2008
Plumbing
• There are two types of systems• Fully filled or two pipe systems
– Two pipes one for water one for air– The water pipe can change in elevation i.e. snake around
obstacles– Temperature variations can effect data
• Half filled or one pipe system– One pipe must be level– Problems with air bubbles and water blocks– Less dependence on temperature and pressure variation
J T Volk Fermilab April 2008
Hydro static water Level SystemsHLSBUDKER sensor
Accuracy 1 micrometerCost $1200 per channelUltra sonic sensor better than 1 micrometer$3500 per channel
Capacitive sensor
Water pool
On stand with water and Air line connections
J T Volk Fermilab April 2008
Fermilab HLS sensors
Balluff proximity sensor
Air line
Water line
Accuracy 6 micrometersCost $120 - $140 per channel
J T Volk Fermilab April 2008
HLS systems at Fermilab
• Fermilab system installed on all quads in Tevatron 204 sensors covers 6 kilometers
• 4 BUDKER sensors in MINOS hall 100 meters below grade on top of Galena Platteville dolomite. We have added 3 more sensors at 90 degrees with respect to original line.
• 5 sensors in LaFarge mine in North Aurora Illinois 120 meters below ground in Galena Platteville dolomite (down at present time moving to new drift)
• 11 Fermilab sensor in NMS hall• 7 sensors on the low beta quads at both B0 and D0 collision halls• 40 sensors on Tevatron quads in B sector (no longer operational) • 40 sensors in MI-8 beam line (no longer operational)
J T Volk Fermilab April 2008
MINOS System
Long base line Neutrino experimentAt Fermilab with Neutrinos are also Detected at Soudan Mine in Minnesota
100 meters below Grade on top of Galena PlattevilleDolomite
4 sensors 30 meters Apart along western wall
J T Volk Fermilab April 2008
Layout of MINOS water level
MINOS detector
30 meters30 meters30 meters
Not to scale
direction
Sensor
Water line
Depth of floor 100 meters below grade406 feet above sea level Maquoketa shale
Location of Horizontal andVertical seismometer New
sensors
J T Volk Fermilab April 2008
MINOS Tidal DataDifference in two sensors 90 meters apart
Pressure Kpsa
difference
J T Volk Fermilab April 2008
January 2006 MINOS Difference in two sensors 90 meters apart
temperature
J T Volk Fermilab April 2008
January 2006 MINOS Difference in two sensors 90 meters apart
J T Volk Fermilab April 2008
Sump Pump test
J T Volk Fermilab April 2008
Difference in two sensors 90 meters apart MINOS hall
27 months of data
J T Volk Fermilab April 2008
Subsidence and Tremors
J T Volk Fermilab April 2008
LaFarge Mine North Aurora
There is a dolomitemine 7 km from the MINOS hall.It is in the GalenaPlatteville layer125 meters below the surface.It is room and pillarConstructionThere are 5 HLSsensors in an abandoneddrift in the mine.
J T Volk Fermilab April 2008
Difference in two sensors 60 meter apart
J T Volk Fermilab April 2008
Difference in two sensors150 meters apart 18 months of data
J T Volk Fermilab April 2008
Summary
• There are several HLS system taking data at Fermilab
• The data are available at http://dbweb1.fnal.gov:8100/ilc/ILCGroundApp.py/index
• There are natural sources of motion tides for example
• There are cultural sources such as sump pumps• Plans for new systems in the works