1. Finite-time shock
acceleration model
• power law spectrum at low energy
• faster dropoff at high energy
2. Expect Ec /A
°
t2/(α+1) (Q/A)2α/(α+1)
3. For 3 events, able to simultaneously fit
measurements
of C, O, and Fe ions
4. Fits
to weak events: Infer λ as typical IP
values
5. Fit to strong event: Infer much lower λ,
consistent with
expectations for proton-amplified waves