Interesting New Tech

NASA has tested a lithium fed electronic thruster, which has the potential to greatly increase the thrust of high specific impulse space propulsion systems. (Up to about 2.5-25 newtons 25N=5.6 lb)

Typically various electronic thrusters can produce about 100 millinewtons. 

If you have a 100 tonne vehicle, with 6x 25N thrusters, you get an acceleration of .0015 m/s2.

ΔV	Units	ΔT
5.40	m/s	1 Hour
12.08	mi/hr
129.60	m/s	1 day
289.91	mi/hr
907.20	m/s	1 week
2029.35	mi/hr
3600.00	m/s	Delta v to get to Mars from LEO
8052.97	mi/hr

So basically, you can go from low earth orbit to coasting to Mars in 12½ days.  The trip would still take about 9 months.

Theoretically the spacecraft could use the increases ISP to further shorten the time involved, but I'm not going to spend the time on celesxtial mechanics to figure that out.

NASA engineers recently tested a next-generation electric propulsion system that could one day power a crewed mission to Mars.

NASA fired up a prototype of its electromagnetic thruster inside a vacuum chamber, reaching power levels of up to 120 kilowatts—the highest achieved in U.S. tests of an electric propulsion system. That’s over 25 times the power of the electric thrusters aboard the current Psyche mission, which launched in 2023 on a journey to explore a metal-rich asteroid.

………

Current electric propulsion thrusters rely on solar power to accelerate propellant, reaching high speeds over time through a low continuous thrust. NASA’s recently tested electromagnetic thruster, on the other hand, runs on lithium metal vapor. The lithium-fed magnetoplasmadynamic (MPD) thruster uses high currents interacting with a magnetic field to electromagnetically accelerate lithium plasma.

Lithium-fed thrusters could potentially operate at high-power levels, using propellant efficiently and providing greater thrust power than the electrical thrusters currently in use, according to NASA. Once fully developed and paired with a nuclear power source, the MPD could help reduce launch mass to support larger payloads for human Mars missions.

They are talking about 4-5 egawatts power, which probably would require nuclear power, 5 mW would require something like 10,000 m2 of solar arrays, but it should make things easier.