Long-Baseline Neutrino Experiment

James StraitLBNE Project Director

Public Information MeetingMay 23, 2013

LBNE-doc-7321

What are neutrinos?

LBNE Public Information Meeting -- May 23, 20132

• Neutrinos are particles with no electric charge and almost no mass.

• They are among the most abundant particles in the universe.

• They are produced in great quantities by the sun and other stars, in the earth, by cosmic ray interactions in the atmosphere. Trillions of neutrinos pass through your body each second.

• Neutrinos hardly ever interact – a typical neutrino could travel through more than 100 million miles of lead unscathed.

• There are three (known) types of neutrinos: electron neutrinos, muon neutrinos and tau neutrinos. Once produced, they can change (“oscillate”) from one type to another and then back again.

Why are neutrinos important?

Neutrinos play an important role in natural processes that are crucial to why we exist.• The reactions in the core of the sun.• The explosions of supernova stars in which the heavy elements

are created and expelled into space to form planets and provide the building blocks for life.

• Small differences between neutrinos and their anti-particle counterparts could help explain why more matter than anti-matter was produced in the Big Bang.

• Understanding if neutrinos behave differently from anti-neutrinos is one of the main goals of LBNE.

Because neutrinos hardly interact, they can tell us what happens in places we cannot “see” otherwise:• In the core of the sun• In the center of a supernova at the moment it explodes.

LBNE Public Information Meeting -- May 23, 20133

Why do we need a new neutrino experiment?

• Since we built MINOS a decade ago, we have learned many things about the properties of neutrinos.

• To learn more, we need to let the neutrinos and anti-neutrinos travel farther through the earth to understand how they oscillate.

• New detector technologies enable more precise measurements

LBNE Public Information Meeting -- May 23, 20134

4550

LBNE Neutrino Beamline and Near Detector

LBNE Public Information Meeting -- May 23, 20135

13 ft.

680 ft.

not to scale

LBNE Neutrino Beamline

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FCAB -- May 26, 20117

Beamline hill as it would appear from Kirk Road near Prairie Path bridge

Current design is 18 feet lower than shown

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Near Detector Building as it would appear from Kirk Road near Giese Road

Additional partners are being sought to help build the Near Detector

LBNE Public Information Meeting -- May 23, 20139

Far Detector at Sanford Underground Research Facility in the Black Hills of South Dakota

Massive Liquid Argon Time Projection Chamber

Detector

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Underground Detector LocationAdditional partners are being sought to place the detector underground

not to scale

45

50

ft

Sanford Underground Research Facility

(SURF) 4550 foot depth

J.Strait, IOP 2013, 10 April 201311

Surface R&D facility MAJORANA Electroforming Lab

0.6 mi

Majorana Demonstrator

LUX

Davis Campus Experiments

LBNE

Base of the Yates Shaft

LBNE Collaboration

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377 collaborators, 63 institutions, 5 countries

Fermilab, March 2013

AlabamaArgonneBostonBrookhavenCambridgeCataniaColumbiaChicagoColorado Colorado StateColumbiaDakota StateDavisDrexelDukeDuluthFermilabHawaiiIndian UniversitiesIndiana Iowa StateIrvineKansas StateKavli/IPMU-TokyoLawrence Berkeley NLLivermore NLLondon UCLLos Alamos NLLouisiana StateMarylandMichigan StateMinnesota

MIT NGA

New MexicoNorthwestern

Notre DameOxford

PennsylvaniaPittsburghPrinceton

RensselaerRochester

Sanford LabSheffield

SLACSouth CarolinaSouth Dakota

South Dakota StateSDSMT

Southern MethodistSussex

SyracuseTennessee

Texas, ArlingtonTexas, Austin

TuftsUCLA

Virginia TechWashington

William and MaryWisconsin

Yale

LBNE Public Information Meeting -- May 23, 201313

MINERvA

MiniBooNE

455 miles

MINOS (far)

at 2340 ft level

5 kton

MINOS (near)

operating

since 2005

Currently Operating Neutrino Experiments at Fermilab

MINERvA

MiniBooNE

455 miles

MINOS (far)

at 2340 ft level

5 kton

MINOS (near)

operating

since 2005

350 kW (>400 kW)

Evolution of Fermilab Neutrino Program:The NOvA Experiment

NOvA (far)

Surface

14 kton

under construction

online 2013

MicroBooNE

under construction

(LAr TPC)

NOvA

(near)

500 miles

MINERvA

MiniBooNE

455 miles

MINOS (far)

at 2340 ft level

5 kton

MINOS (near)

operating

since 2005

350 kW (>400 kW)

To Advance Understanding of Neutrinos a New Facility is Needed: LBNE

NOvA (far)

Surface

14 kton

under construction

online 2013

700 kW

MicroBooNE

under construction

(LAr TPC)

NOvA

(near)

500 miles800 miles

New beamlineNear detector

LBNE Far detectorat 4850 ft level>10 kton 34 kton LAr TPC