o ak r idge n ational l aboratory u. s. d epartment of e nergy 1 sns 2 meeting opening remarks,...

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OAK RIDGE NATIONAL LABORATORYU. S. DEPARTMENT OF ENERGY

SNS2 Meeting

Opening Remarks, Purpose

Glenn R. Young

Physics Division, ORNL

August 28, 2003

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Why Are We Here?

SNS makes large flux of neutrinos

These are in an interesting energy range for nuclear physics and astrophysics

Experimenters are obstreperous people who believe you should never take a theorist's word for it on cross sections

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Making the Science Case Does this impact our understanding of

nuclear structure neutrino cross sections supernovae explosions nucleosynthesis

Can you define science goals and a measurement program?

Which cross sections are most interesting? Which provide the biggest "sensitivity" for our

understanding of physics?

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Does It Pass the Ha Ha Test ?

Given the input parameters- neutrino flux- "1 year" of SNS running- reasonable volume of detector- expected cross sections- active fraction of volume

Do you get an interesting number of events?

How many cases can you handle in 10 years?

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Does It Pass Practical Factors Checks ?

Can it find a permanent home at the SNS? Can you change the "target" in a reasonable length of

time?

- how long to run one target?

- how long physically to change target material? Can you allow for both segmented and homogenous

detectors? Can you load 2 targets simultaneously? i.e., run 2

detectors? Can you stay under a few $M?

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Can You Define a Detector Suite?

What are the scales of the detectors? Passive vs. active volume Shape Technology ”Channel counts"

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Can You Handle Shielding?

Background rates and composition Signatures of background events? Shield concept? Mass? Floor loading? Resultant errors on physics measurements?

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What are the Interfaces with the SNS?

Space Services People Run cycle Evolution of beam energy, intensity Monitoring of power, neutrino flux and fluence

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How Long Do Things Take?

How long to design to build to commission to do one target to change targets

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Can a Collaboration Be Formed?

Who How many people? Tasks? Universities? Students? What are their projects? Leadership? R&D needed? or proof-of-concept

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What is it Going to Cost?

Initial cost - capitalization Running cost - people, consumables,

upgrades Target change cost - an area for deferral to

the future;-)

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How Do We Sell It?

Mentioned in LRP but not as a major item Linkage to CPU report of M. Turner

DNP will have session on ‘how to respond’ at Tucson Linkage to ongoing RIA, SciDAC, NASA efforts People needed Student opportunities Cost “Advertising”

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What is the Timeline from Today to Proposal to Construction?

Need ‘formal’ SNS approval (may have it) Need White Paper on physics Need Proposal Need "friendly" DOE, NSF, DNP, LRP (next

LRP in 2007 ;-( ) “For information only” presentation to

DOE and NSF by early 2004 At least 2 years from proposal to funding

o ak r idge n ational l aboratory u. s. d epartment of e nergy 1 sns 2 meeting opening remarks,...

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