SalSA ideas, action items,proposals

Notes from Friday’s Discussion session

Physics• cosmology: may not be senstive to since source

evolution systematics dominate

• action item: theorists…can variations in be separated from source evolution?

• action item: How many events do we need per year?• action item: get GZK spectrum for z=20 sources• action item: Are there detectable effects of anomalous late

inflationary stages?• action item: anomalous upcoming signals such as strange

nuggets, neutralinos etc.• action item: get “table of telescope discoveries”• action item: how well can you measure the cross section vs.

number of events.

Engagement with community• action items: giving salsa talks• action items: find DOE groups that are interested• action item: go to SAGENAP• SLAC involvement in design studies• engage SLAC director

Monte Carlo• action item: what reslolution is necessary to be able to

measure spectral distortion to sufficient precision to factor effects of and source evolution?

• Need multiple frequency measurements to feed into the simulations

• Run MC’s with different atten lengths• Lepton ID is critical to physics goals• add multiple-vertex showers• setup up e-log for document sharing• calculate the time-domain pulse• Get SLAC people involved in MC development• What can we do with an 8x8x3km salt array? • What would a 3 string array see?

Hardware & Design Issues• Optimizing nodes per string cost vs. physics• action item: toyMC Justification for acoustic sensors every 10

m (V )• action item: Noise level from salt formations • action item: coupling acoustic sensors without clamping?• Make decision tree to follow

Urgent items:Plan for propsal in May/June

• Site selection• Monte Carlo work• Trip to DC/Germantown