  We devised a portable system that generates pulsed high magnetic fields up to
77 T with 3 $\mu$s duration. The system employs the single turn coil method, a
destructive way of field generation. The system consists of a capacitor of 10.4
$\mu$F, a 30 kV charger, a mono air-gap switch, a triggering system, and a
magnet clamp, which weighs less than 1.0 tons in total and is transportable.
The system offers opportunities for single-shot experiments at ultrahigh
magnetic fields in combinations with novel quantum beams. The single-shot x-ray
diffraction experiment using x-ray free-electron laser at 65 T is presented. We
comment on the possible update of the system for the generation of 100 T.
