90 likes | 168 Views
Scott Menary. U.S. LArTPC Detector Activities. The International Scoping Study Meeting of Neutrino Factory and Super-beam Facility. August 21-23, 2006 @ UC Irvine. Conclusions (from RAL Meeting).
E N D
Scott Menary U.S. LArTPC Detector Activities The International Scoping Study Meeting of Neutrino Factory and Super-beam Facility August 21-23, 2006 @ UC Irvine ISS @ UC Irvine August 2006
Conclusions (from RAL Meeting) • The infrastructure needed to build prototype Liquid Argon TPC’s and to examine issues associated with constructing large (10’s of ktons) LArTPC’s now exists at some non-trivial level in the U.S. • There has been progress made in design of interior of the tank, in particular the wire planes. • There is movement toward forming an international collaboration. • We had a joint meeting at Yale University July 11-12 with some ICARUS people to explore areas of collaboration. ISS @ UC Irvine August 2006
Proposed NuMI LArTPC R&D Path Fermilab, Michigan State, Princeton, Tufts, UCLA, Yale, York (Canada) from our* submission to NuSAG (Fermilab FN-0776-E) or maybe 50 kton ISS @ UC Irvine August 2006
Sensitivity of LArTPC on Surface at MINOS LocationMINOS plus1,2,3,6,and12kt LArTPC ISS @ UC Irvine August 2006
P(nu_mu->nu_e) at 810 km Set sin^2(2theta_13) = 0.04 and Cycle delta_CP from 0 to 360 deg If using a narrowband beam you almost need to know delta_CP beforehand - Wideband beam is better ISS @ UC Irvine August 2006
Can We Observe both the First and Second Maxima with the NuMI Off-axis Beam? Oscillation Probability Overlayed on Nu Spectra From 8 to 26 mrad Off-axis of NuMI Medium Energy Beam Here the answer is clearly NO. ISS @ UC Irvine August 2006
Same Conclusion for the Low Energy Off-axis Beam ISS @ UC Irvine August 2006
Finally, What about at 990 km From Fermilab (Furthest Canadian Site)? Here, 20 mrad is the minimum off-axis angle allowed (since central axis of the beam is some 16 km above the surface at this point). ISS @ UC Irvine August 2006
Conclusions • To observe both the first and second maximum in the same detector requires a wideband beam and, of course, a detector like the LArTPC that can differentiate between photons and electrons. • Even precision studies a the first maximum need a beam broad enough to account for the variation due to delta_CP. ISS @ UC Irvine August 2006