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#### User name M Jones

#### Log entry time 17:55:45 on February14,2002

#### Entry number 82781

#### Followups:

keyword=Time estimate for Ac calibration from ep elastics

Time estimate for Ac calibration from ep elastics

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Assume

current = 100uA

beam helicity = .75

beam energy = 3.944

Q^2 = 4.13

Combined efficiency of carbon and CH2 = 0.55

Effective analyzing power of carbon and CH2 = 0.09

so Figure of merit = eff x Ac x Ac = 4 x10-3

I get rate of about 90 Hz for elastics.

To get del(Ac)/Ac about 2 - 2.5% is 24 hours

This will give del(Ge/Gm)/(Ge/Gm) of about 5% .