The threat of nuclear weapons in space is a looming concern, and a recent study by MIT physicist Areg Danagoulian offers a potential solution. Danagoulian's research proposes a satellite-based sensor system that could detect thermonuclear weapons by identifying the unique neutron signature emitted when high-energy protons collide with radioactive material. This innovative approach addresses the challenge of verifying compliance with the Outer Space Treaty, which currently lacks robust means to detect nuclear weapons in space.
The study's significance lies in its ability to overcome the technical hurdles associated with space-based weapons detection. By utilizing the inner Van Allen belt, a region of high-energy protons and electrons, Danagoulian's system can identify the neutron emissions resulting from proton-induced spallation. This process occurs when high-energy protons interact with heavy elements like uranium, commonly used in thermonuclear weapons, releasing neutrons and other particles.
Danagoulian estimates that a thermonuclear weapon could emit up to 40 million neutrons per second when encountering the high-energy protons in the Van Allen belt. However, the challenge lies in distinguishing these neutrons from the constant barrage of protons and electrons in low Earth orbit. To address this, Danagoulian's sensor system employs directional detection, allowing it to determine the origin of neutrons and filter out background signals from cosmic rays hitting the Earth's atmosphere.
The inspector satellite, designed to orbit below the suspect satellite, plays a crucial role in this process. By positioning the inspector satellite 2.5 miles apart, Danagoulian's model demonstrates its ability to detect the neutron emissions from the thermonuclear weapon, effectively 'sniffing' it out. While the study confirms the feasibility of the concept, Danagoulian emphasizes the need for further development and simplification of the system.
This research marks a significant step towards enhancing space-based weapons verification and upholding the Outer Space Treaty. As space-based warfare becomes an increasingly pressing concern, Danagoulian's work provides a promising foundation for future advancements in this critical area.
