From the paper: >However, the .01 c mission sketched in [10] has a spacecraft mass of only 6.6 mg, divided between the sail and the payload. Multiplying this b

From the paper: >However, the .01 c mission sketched in [10] has a spacecraft mass of only 6.6 mg, divided between the sail and the payload. Multiplying this by 100 while keeping the sail mass fixed leaves a payload mass of barely .65 grams. Oof. That's not a lot.