S. MenaryISS @ UC Irvine August 20061 U.S. LArTPC Detector Activities Scott Menary The International...
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Transcript of S. MenaryISS @ UC Irvine August 20061 U.S. LArTPC Detector Activities Scott Menary The International...
U.S. LArTPC Detector Activities
Scott Menary
The International Scoping Study Meeting of
Neutrino Factory and Super-beam Facility
August 21-23, 2006 @ UC Irvine
S. Menary ISS @ UC Irvine August 2006 2
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.
S. Menary ISS @ UC Irvine August 2006 3
Proposed NuMI LArTPC R&D Path
or maybe 50
kton
Fermilab, Michigan State, Princeton, Tufts, UCLA, Yale, York (Canada)
from our*
submission toNuSAG(Fermilab FN-0776-E)
S. Menary ISS @ UC Irvine August 2006 4
Sensitivity of LArTPC on Surface at MINOS LocationMINOS plus 1, 2, 3, 6, and 12 kt LArTPC
S. Menary ISS @ UC Irvine August 2006 5
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 almostneed to know delta_CP beforehand- Wideband beam is better
S. Menary ISS @ UC Irvine August 2006 6
Can We Observe both the First and Second Maxima with the NuMI Off-axis Beam?
Oscillation Probability Overlayed on Nu SpectraFrom 8 to 26 mradOff-axis of NuMI Medium Energy Beam
Here the answer is clearly NO.
S. Menary ISS @ UC Irvine August 2006 8
Finally, What about at 990 km From Fermilab
(Furthest Canadian Site)?
Here, 20 mrad is the minimum off-axisangle allowed (since central axis of thebeam is some 16 km above the surfaceat this point).
S. Menary ISS @ UC Irvine August 2006 9
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.