The drawing above gives 792 people more open area then the above calculations would suggest. Which is probably necessary given how long the voyage is. With a few single person apartments that can be converted to conference and lab areas. This should be a functional arrangement both for the trip, and for the exploration phase. While not as glamorous.
Most people involved in space exploration do support and analysis functions.
Only a fraction of the crew will ever leave the ship, and most of the science will be done back on the ship pouring over the data recordings. Thus the need for some office space and a lot of networked personal computers. Given the performance increases in computers. These personal computers should have hundreds of times the power and capacity of a human brain. Crew Quarters Radiation Shielding Normal radiation shielding is defined as mass per surface area of the area being shielded.