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Beaming laser power to ion drive is 300-400 times more thrust than just laser photonic sail

•, brian wang

JPL is working on the gridded lithium ion arrays to achieve 60,000 ISP.

There is work on 60 meter deployable solar arrays.

This system will achieve a speed of about 260 kilometers per second (almost 0.01% of light speed) and enable the fast 10-12 year mission to 500 AU gravitational lens and manned missions to Jupiter in 1 year travel time.

Here is a video of a new talk by John Brophy starting at 1:15:40 of the video.

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