Complex sentence: The high beta fusion reactor is a project been developed by a team led by Charles Chase of Lockheed Martin's Skunk Works, for a High Beta configuration, which allows a compact reactor design and speedier development timeline (5 years instead of 30).
Split into simpler sentences: The high beta fusion reactor is a project been developed by a team led by Charles Chase of Lockheed Martin's Skunk Works. The "high beta" configuration, which allows a compact fusion reactor design and speedier development timeline (5 years instead of 30).