Transcript Document 7891725

NuMI
MINOS
New Rock Map Work
Alec Habig
NONAP working group meeting
MINOS Collaboration Meeting, Athens
Friday, April 13, 2007
NuMI
Current Rock Map
MINOS
• Sue Kasahara in her thesis used:
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–
–
–
USGS Digital Elevation Maps
+Trig
+standard rock
gets column depth of rock as a function of (q,f) for
Soudan II
• Updated to MINOS location by Brian Rebel
• Used in charge ratio paper to get Intensity(q,f) to first
order
– Intensity then fit to Crouch curve per dW bin to extract
surface energy of CR’s in that bin
• Turns uncertainty in rock into uncertainty in Em cosq (per bin)
– Same for m+ and m- in that bin, so all is OK
5/27/2016
Alec Habig, Athens MINOS
Collaboration Meeting
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NuMI
DUSEL & Geology
MINOS
• Much geological surveying has been done for
the DUSEL/Soudan proposal
– Primarily by Dean Peterson of UMD’s
Precambrian Research Center
• See http://soudan.umn.edu/ius for some
really good stuff
• We now have very detailed surface topology,
and 3D maps of the geological features
underground
– Including density/composition
5/27/2016
Alec Habig, Athens MINOS
Collaboration Meeting
Page 3
NuMI
An Old Iron Mine
MINOS
Hematite Ores
Mine Workings
Soudan
Lab
5/27/2016
Alec Habig, Athens MINOS
Collaboration Meeting
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NuMI
MINOS
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Alec Habig, Athens MINOS
Collaboration Meeting
Page 5
NuMI
Parent Iron Formation
MINOS
Iron
formation
5/27/2016
Alec Habig, Athens MINOS
Collaboration Meeting
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NuMI
MINOS
5/27/2016
Alec Habig, Athens MINOS
Collaboration Meeting
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NuMI
Column Depths
MINOS
Iron formation
Rays from
MINOS
every 5o
(can dial in
resolution)
5/27/2016
Alec Habig, Athens MINOS
Collaboration Meeting
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NuMI
MINOS
5/27/2016
Alec Habig, Athens MINOS
Collaboration Meeting
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NuMI
Even Larger Geology
MINOS
Soudan Fault
Iron
Formation
Greenstone
“Granitoid”
Gabbro
5/27/2016
Felsic Tuff
Alec Habig, Athens MINOS
Collaboration Meeting
Page 10
NuMI
MINOS
5/27/2016
Alec Habig, Athens MINOS
Collaboration Meeting
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NuMI
Surface
MINOS
Detailed Topo
Of Soudan
3D Model
These rays cut by
regional DEM
Rays from
MINOS
every 5
degrees
5/27/2016
Alec Habig, Athens MINOS
Collaboration Meeting
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NuMI
MINOS
5/27/2016
Alec Habig, Athens MINOS
Collaboration Meeting
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NuMI
Plans
MINOS
• Dean Peterson is kindly making available his 3D
geology maps and models
– Formatted in “GOCAD”
• Steve Farrell (UMD undergrad) is working to convert
them to MINOS-centered rays
– Line segments have density, length
– Integrate up each column in total g/cm2, put in (q,f) lookup
table class for use in minossoft
• Will crosscheck with muon intensity
– Especially in the ore body, much of which has been mined,
and we don’t know the status of what’s gone, what’s been
backfilled, what’s still open air
5/27/2016
Alec Habig, Athens MINOS
Collaboration Meeting
Page 14
NuMI
Uses?
MINOS
• Does not change current muon charge paper
• Could be used to reduce systematic errors in
Em cosq
• Enough knowledge to tease out the
differential dE/dx of m+, m-?
– Dunno.
• Does it have a way high nifty factor?
– You betcha!
5/27/2016
Alec Habig, Athens MINOS
Collaboration Meeting
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