sandia

national

laboratories

annular

core

research

reactor

megawatts

nuclear

science

experiment

nuclear reactor (invention)

cherenkov

cherenkov radiation

vavilov–cherenkov

payday 2

razormind

solid

rocket

motor

aerospike

altitude

compensation

spike

annular

gap

nozzle

thrust

fire

smoke

flame

propulsion

chamber

throat

high

pressure

igniter

impulse

mach

diamonds

apcp

ammonium

perchlorate