From: Steve Biller (Steven.Biller@physics.ox.ac.uk)
Date: Thu May 19 2005 - 04:30:30 CDT
A couple comments:
1) I'm not sure how "innovative" a two-region design actually
is (in fact, I AM sure.... it's not). We may have come up
with a nice way of using it, but that's another matter.
"Innovative use of" might be better, but we should re-think
the wording a bit.
2) Under "Deep near detector" on page 2, I thought we agreed
to expunge the words "weak mixing angle" from our discussions
of elastic scattering. We could just say measurement of
the ES cross section at these energies, or exploration
of neutrino couplings... Peter had a pretty clear suggestion
for this which we should adopt throughout.
3) Another advantage of the large detectors, which we haven't
really mentioned, is that the volume is large enough that
we ought to be able to really see the fall-off in radioactive
backgrounds (and even penetrating neutrons) as you move further
into the volume from the acrylic wall. We certainly found
this to be a big advantage for SNO and I'm sure this ability
will lend itself to a variety of important cross-checks.
4) Another thing we discussed a while back but aren't really
pushing here is the ability to re-deploy all detectors to
the far site in the event theta13 turns out to be very small.
This is a straight-forward path to a Reactor II scenario
for us which is impossible for double-Chooz and could not
be done at Daya Bay without building more detectors. I agree
with Peter that we should try to make the sensitivity curve
for shape-only look a bit more reasonable at the higher end,
but perhaps we should do so and show such a plot?
5) The potential for also having one of the best SN detectors
on account of our shield mass might be nice to get in,
however this will clearly depend on what shield design we
ultimately go with, and that's not decided. Therefore,
I'm not sure if this should belong in this list, but it may
be worth thinking about how it might be worked in somewhere
with an appropriate qualifier.
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