An Alternate Perspective Most development on ton detectors –~500 GW-ton-years –Systematics limited for rate measurement Lots of thought about systematics –Insuring identical detectors –Moving detectors? Discussions involve large costs to improve confidence in measurement

What about the Spectrum? Shape Test:  Minimizes Detector Specific Systematics  Loss of overall rate information

Is There Enough Luminosity? 500 ton Detector

Spectrum Ratio

What is a 500 ton Detector? Fiducial radius = 4.92m 3 volume radius = 6.27m Surface area (number of PMTs) goes up by factor 3-4 Cost would similarly scale

Can We Handle a Big Detector? For 3 Volume Design 20% PMT Coverage

Effect on Energy Resolution