As some of you might know, I have designed a crewed interstellar spacecraft that I call Solar One.
Basically, large flexible mirrors placed near the Sun would propel a one-mile light sail with a 4–crew spacecraft of 300 tons.
To decelerate, an on-board compact fusion reactor would power a photon rocket placed at the front of the spacecraft that would 1) help decelerate and 2) ionize space hydrogen for the nuclear reactor.
A Bussard scoop also placed at the front of the spacecraft would 1) collect those protons (ionized hydrogen) and 2) decelerate the spacecraft.
Solar One would achieve an average of 22% the speed of light, which would allow the crew to reach the closest potentially habitable exoplanet in less than 19 years.
Of course cryo-sleep and artificial gravity must be achieved first.
Here is my paper in arXiv:
https://arxiv.org/abs/2007.11474
And here a short movie of Solar One:
https://youtu.be/JEf7Z_TLmgU
Feedback is appreciated!