Presumably it would be a flying wing with plasma thrusters all along the back edge(no need for flaps or rudders), And focus fusion for power.
A quick look at the numbers in the abstract in the PDF look promising.
http://iopscience.iop.org/article/10.1088/1742-6596/825/1/012005/pdf
Depending on the capacitor voltage (200-600 V) the energy input at one atmosphere varies
from 52-320 J/pulse corresponding to impulse bits from 1.2-8.0 mNs. Such a new pulsed plasma
propulsion system driven with one thousand pulses per second would already have thrust-to-area
ratios (50-150 kN/m²) of modern jet engines. An array of thrusters could enable future aircrafts and
airships to start from ground and reach altitudes up to 50km and beyond.
SKIP
In the air regime with initial pressures from 0.1-10 Torr the plasma jet has a
lifetime of 50-100 µs, can reach velocities from 5-20 km/s and high densities from 1017-1018 cm-3 [8]. In the
plasma focus the pinching discharge can be compressed to pressures of about 100-150 bar [8].
SNIP
The velocity for LEO is 3.2 kilometers a second so as long as the thrust to drag ratio remains good an exhaust velocity of 20km/s should get you into orbit, just need to take some reaction mass for the apogee thrust but once your orbit is circulerised you can use the low thrust but very high velocity (4.5%light speed) of p+b11 focus fusion to get you anywhere in the solars system. Then you can harvest He3 from Uranus to fuel fusion drive with an even higher 8.9%c exhaust velocity and go interstellar.
50km high cruising is the height of many launch loop ideas, focus fusion powered space planes makes the infrastructure heavey ideas of Lofstrom Loops or space elevators obsolete.