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Ground Motion Studies at Fermi National Accelerator Laboratory...
Transcript of Ground Motion Studies at Fermi National Accelerator Laboratory...
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Ground Motion Studies
at Fermi National Accelerator
Laboratory
James T Volk
Applications Physicist II
Vladimir Shiltsev
Fermilab
Shavkat Singatulin Fermilab and Budker Institute
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Future Plans at Fermilab
J T Volk Fermilab Aug 2012
Project X an 8 GeV
Superconducting
LINAC
Muon
Cooling test
facility
Muon Collider
Intense ν beams to
NUMI 890 km
north and DUSEL
1480 km west
International
Linear Collider
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Ways to Monitor Ground Motion
J T Volk Fermilab Aug 2012
Sercel Seismometer
Water levels BUDKER seismometer
Geophone
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Hydro static water Levels Systems
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h1
h2
Water seeks it’s own level
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Hydro static water Levels Systems
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h1
h2
Water seeks it’s own level
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Hydro static water Level Systems
HLS
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BUDKER sensor
Capacitive pickup
Accuracy 1 micrometer
Cost $1200 per channel
Capacitive sensor Water pool
On stand with water and
Air line connections
Water line
Air line
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MINOS-2 HLS
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10 m
Electronics
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Difference in two sensors 70
meters apart
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3/31/2012 4/3/2012 4/6/2012 4/9/2012
-5
0
5
10
15
L0-L
7 (m
icro
ns)
date
L0-L7
12.4 hrs
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January 2006 MINOS
Difference in two sensors 90 meters apart
J T Volk Fermilab Aug 2012
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January 2006 MINOS
Difference in two sensors 90 meters apart
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Sump Pump Test
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Earth quake April 18 at 04:27 hrs CDT 380
km (236 miles) south south east of
Fermilab
J T Volk Fermilab Aug 2012
Magnitude 5.2
Start 04:27 hrs
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North South and East West sensors
difference MINOS hall
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Mic
ro m
eter
s
Date
Time of Earth quake
04:27 April 18
08:33 April 19
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LaFarge Mine North Aurora
J T Volk Fermilab Aug 2012
There is a dolomite mine 7 km from the MINOS hall. It is in the Galena Platteville layer 125 meters below the surface. It is room and pillar Construction There are 5 HLS sensors in an abandoned drift in the mine.
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The LaFarge Mine North Aurora Ill
J T Volk Fermilab Aug 2012
Entrance to mine 390 meter decline
In the Galena Platteville dolomite 120 meters below grade
If the ILC were built at Fermilab this would be the preferred depth and strata
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Budker Sensors in South 5 drift
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Station 3 Station 4
Water line Air line Data cable Note built up concrete pillar this is to make up for difference in floor elevation
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Difference in two sensors 60 meter apart
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New setup in S5 drift 7 months of data
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Nov 2008
Conveyor problem at mine
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DUSEL
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Deep Underground Science
and Engineering Lab
Lowest drifts 8000 ft (2400
meters) flooded to 4850 ft
(1470 meters)
In January 2009 there will be 12
Tevatron style HLS installed at
2000 ft
In the summer 12 HLS at the
4100 ft (1242 m) to monitor tilt
during dewatering process
In the Homestake
Gold mine in Lead SD
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HLS layout at 2000 and 4850 foot level
J T Volk Fermilab Aug 2012
4 independent stations
200 ft between HLS
2 independent stations
7 meters between sensors
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HLS at DUSEL
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Tom Trancynger filling system with
water
Jason Van Beek terminating data cable
Larry Stetler of SDSM&T and Jim Volk
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Floor tilt 4850 ft level Homestake mine
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Russian Seismometer
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J T Volk Fermilab Aug 2012
Vertical motion at grade Fermilab
log scale
0.1 1 10
0.0000
0.0005
0.0010
0.0015
0.0020
0.0025
Frequency (Hz)
Am
pli
tud
e V
olt
s
MP8 Vertical FFT
CHL
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J T Volk Fermilab Aug 2012
Horizontal motion at grade Fermilab
log scale
0.1 1 10
0.000
0.001
0.002
0.003
0.004
0.005
0.006
0.007
Frequency (Hz)
Am
plit
ude
Vol
ts
Horizontal FFT
MP8 Floor
CHL
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Central Helium Liquifier
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Large
compressors
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Summary
• There are several HLS system taking data at Fermilab in the Homestake mine.
• They are accurate and reliable can run for several years.
• They are useful for determining ground motion and tilt.
• The data are available at; http://dbweb1.fnal.gov:8100/ilc/ILCGroundApp.py/index
• There are natural sources of motion: tides, rain fall, earth quakes both large and small.
• There are cultural sources such as sump pumps.
• Plans for new systems in the works.
J T Volk Fermilab Aug 2012
http://dbweb1.fnal.gov:8100/ilc/ILCGroundApp.py/index