Gina Rameika Future Long Baseline Study Intro to the Meeting September 16-17,2006 Fermilab

Gina Rameika Welcome Logistics (a.k.a coffee and Sunday Lunch) Review of our charge Starting Point Organization of the study Status of “deliverables” Brief description of the final report –Much more tomorrow Review of the Agenda Questions??

Gina Rameika Logistics Coffee and bagels tomorrow morning - here ~9 am Pizza order for Sunday Lunch –$6, sign up on sheet before Sunday 10 am Send talks to

Gina Rameika Review of Our Charge Drafted by Hugh Montgomery (FNAL) and Sally Dawson (BNL) April 2006 “U.S. Long Baseline Neutrino Experiment Study” Timescale : –results from the study by October 2006 –mid-term report in July

Gina Rameika Compare the neutrino oscillation physics potential of : –A broad band neutrino beam from ~1 MW FNAL accelerator, aimed at a DUSEL based detector to –An Off-axis neutrino beam from FNAL (1-2 MW) aimed at a Liquid Argon detector, either at DUSEL or as a second detector for the NOvA experiment

Gina Rameika To be considered : i)Ability to establish a finite  13, determine the mass hierarchy, search for CP-violation; limiting systematics ii)Precision of measurements and hence ability to discriminate between neutrino mass models iii)Experiment design concepts : optimum energies, geometries, technologies, cost guesstimates

Gina Rameika Meanwhile… new charge to NuSAG … We would now like your group to address the APS Study’s recommendation for a next-generation neutrino beam and detector configurations. Assuming a megawatt class proton accelerator as a neutrino source, please answer the following questions for accelerator-detector configurations including those needed for a multi-phase off-axis program and a very-long-baseline broad-band program. This assessment will be used as one of the key elements to guide the direction and timeline of such a possible next generation neutrino beam facility.

Gina Rameika Questions for NuSAG Scientific potential : What are the important physics questions that can be addressed at the envisioned neutrino beam facility? Associated detector options : What are the associated detector options which might be needed to fully realize the envisioned physics potentials? What are the rough cost ranges for these detector options? Optimal timeline: What would be the optimal construction and operation timeline for each accelerator-detector configuration, taking the international context into account? Other scientific considerations: What other scientific considerations, such as results from other neutrino experiments, will be important in order to optimally determine the design parameters? What would be additional important physics questions that can be addressed in the same detector?

Gina Rameika The DOE and NSF would like a preliminary draft of your report by June 2006, with a final version by August 2006.

Gina Rameika Starting Point Phase 0 : Current Program –operations –NuMI to MINOS L = 735 km on-axis LE beam 12e20 POT total Phase I : Program under construction – –NuMI to NOvA L = 810 km, 12 km off-axis ME Beam -> 2 GeV neutrinos ~6e20 protons/year

Gina Rameika Phase II : The subject of our study –Protons Beam energy and intensity –Neutrinos Energy spectrum –Wide band –Narrow band/off-axis –Detectors Water cerenkov Liquid Argon

Gina Rameika

Questions from NuSAG Very detailed Distributed to study group members by Milind I will post the list later today

Gina Rameika Organization of the Study Accelerator Neutrino Beams –Wide Band : DUSEL –Off-Axis: NuMI Detectors –Water cerenkov –Liquid Argon

Gina Rameika Status of “deliverables” a.k.a. written material Preliminary design, cost, and schedule of a 300 kT water Cherenkov detector array is discussed in "Proposal for an Experimental Program in Neutrino Physics and Proton Decay in the Homestake Laboratory," Collaboration: BNL, Brown University, UC/Berkeley, LBNL, University of Pennsylvania, Princeton University, UCLA, University of Wisconsin, University of Kansas, University of Colorado. July 12, BNL IR. a modified copy without some figures is at hep-ex/ Design, simulation, and event yields from a new intense wide band neutrino beam from FNAL is discussed in "Simulation of a Wide-band Low-Energy Neutrino Beam for Very Long Baseline Neutrino Oscillation Experiments," M. Bishai, J. Heim, C. Lewis, A. D. Marino, B. Viren, F. Yumiceva, July 20, 2006 PDF. Calculation of the beam spectra and event rates for various off-axis locations on the NuMI beamline is calculated in "Event Rates for Off Axis NuMI Experiments," B. Viren, June 8, BNL IR or hep-ex/ This document is still in revision. It describes the technical requirements and feasibility for a solid target with a ~1MW capability. "Target System for a Long Baseline Neutrino Beam," N. Simos, H. Kirk, J. Gallardo, S. Kahn, N. Mokhov. June 26, DOC. A plan for increasing the proton intensity at FNAL in described in "Fermilab Proton Projections for Long-Baseline Neutrino Beams," Robert Zwaska for the SNuMI planning group, July 17, local pdf. and FNAL-Beams-DOC-2393

Gina Rameika A simulation of water Cherenkov detector with a wide band neutrino beam and the first attempt to suppress showering events background to acceptable levels is described in "Background Rejection Study in a water Cherenkov detector," C. Yanagisawa, C. K. Jung, P.T. Le, B. Viren, July 18, pdf. For the wide band beam and water Cherenkov detector option we have calculated the physics sensitivity taking into account all correlations and degeneracies as well as estimates for systematic uncertainties. This work is reported in "Precision physics with a wide band super neutrino beam," V. Barger, M. Dierckxsens, M. Diwan, P. Huber, C. Lewis, D. Marfatia, B. Viren, Jul 17, 2006 hep-ph/ for a local copy BNL JA pdf. Resolution and Background Rejection in a Liquid Argon TPC. "Monte Carlo study of a liquid Ar time projection chamber for long baseline neutrino experiments." A. Curioni, August 10, pdf. Cosmic ray rates on a surface liquid argon TPC, David Gerstle and Stephen Pordes, August 21, 2006, pdf. Deep Underground Cryostat for a LArTPC, Carl Bromberg, September 12, 2006, pdf.

Gina Rameika The Report Basic Idea : it’s a guide to the write-ups Short summaries “just the facts” conclusions

Gina Rameika Today’s Agenda Morning –Updates/reviews of work presented at earlier meetings Afternoon –Newer work

Gina Rameika Tomorrow Morning –Discussion of the report preparation Afternoon –Continue presentation of newer work –More informal –Q&A –Discussion

Gina Rameika Questions?

Gina Rameika Example of some nice work done by Christine Lewis - available from the Study web page We can look at more Of these tomorrow