CERN and ADVACAM Deploy Radiation Monitoring System for NASA’s Artemis II

NASA’s Artemis II mission, launched earlier this morning, carries a radiation monitoring system developed through a collaboration between CERN and ADVACAM, marking the first human journey to the Moon since 1972. The system utilizes six Timepix chips to measure the radiation environment within the Orion spacecraft, a critical step toward ensuring the safety of future lunar and deep space exploration, as astronauts are expected to receive tens of millisieverts of radiation during the ten-day journey, more than ten times the annual dose experienced on Earth. Unlike missions in low Earth orbit, Artemis II will venture beyond the protective geomagnetic field, exposing the crew and sensitive electronics to increased levels of galactic cosmic rays and trapped particles. Understanding and managing this exposure is essential for continued safe space exploration, highlighting the importance of real-time data collection for assessing risk and responding to sudden events like coronal mass ejections.

CERN Timepix Chips Monitor Artemis II Radiation Environment

Understanding this exposure is paramount for ensuring the safety of future deep-space exploration. These Timepix chips are integral to NASA’s Hybrid Electronic Radiation Assessor (HERA) system, designed to characterize the radiation in real time. The system analyzes the composition, intensity, and energy of incoming particles, providing crucial data for assessing risks to both the astronauts and the spacecraft’s sensitive electronics. In such environments, real-time radiation monitoring and characterization, along with a rapid response capability, are essential, particularly during sudden radiation events such as coronal mass ejections. Developed by the CERN-hosted Medipix2 Collaboration, the chips utilize a matrix of pixels to detect individual particles and measure their energy deposition, allowing for identification of different radiation types.

This is not the first time Timepix technology has left Earth; it was initially deployed to the International Space Station in 2012 and has since contributed to orbital radiation studies. However, Artemis II represents a significant expansion of its capabilities, as the data collected will refine radiation models and improve shielding strategies for longer-duration missions, ultimately informing risk assessment for humanity’s continued journey into deep space.

Hybrid Electronic Radiation Assessor Measures Space Particle Composition

Central to this monitoring is NASA’s Hybrid Electronic Radiation Assessor, or HERA, incorporating six Timepix chips originally developed at CERN and deployed through a collaboration with ADVACAM, a photon-counting imaging specialist. HERA analyzes the radiation environment in real time, assessing the intensity, energy, and composition of incoming particles. This detailed analysis is vital because the space environment presents a complex mix of radiation sources, including trapped particles within the Van Allen belts, galactic cosmic rays, and unpredictable solar particle events like coronal mass ejections. The Timepix chips achieve this through a matrix of pixels capable of detecting individual particles and measuring their deposited energy, allowing for identification based on track shapes; this technology, initially created for particle physics experiments at the Large Hadron Collider, has been adapted for space applications through collaborative efforts. Data gathered during the ten-day mission will refine radiation models, evaluate shielding effectiveness, and improve risk assessments for future deep-space endeavors, ultimately contributing to safer and more sustainable human space exploration.