NASA MSFC Mission Operations Laboratory MSFC NASA MSFC Mission Operations Laboratory Radiation Environment Monitor Kevin Hargrave EO November 2012 Rev. 1 Ops Summary

NASA MSFC Mission Operations Laboratory MSFC Page 2 Radiation Environment Monitor Objectives Purpose: The Radiation Environment Monitor will provide an advanced dosimetry system for exploration mission architecture, reducing logistics for passive processing and provides immediate data availability, including potential particle spectra data. Ground based experiments indicate feasibility for determining particle Z and energy of space- like radiation fields, but cannot simulate the simultaneous broad spectrum of the space field. Flight data required to fully test software algorithms with broad distribution of particle types, intensities, and incident angles not reproducible in ground based exposure facilities. Demonstrate viability of technology in the space radiation environment. Demonstrate ability to assess crew exposure in near real time (via ground software) Value: Technology possibilities beyond this technology demonstration: Potential passive size device with capability of much larger active instruments. (Provide time-resolved personal measurements (including high-risk periods i.e. enhanced environment and during EVAs) Potential to integrate technology in the structure of future vehicles Investigator: Edward Semones, Radiation Health Officer – Human Health and Performance (HH&P) SD/Space and Clinical Operations Division, NASA

NASA MSFC Mission Operations Laboratory MSFC Page 3 Radiation Environment Monitor Overview Current passive devices used for personal dosimetry and area monitoring. Radiation Area Monitor (RAM) Thermoluminescent Dosimeter (TLD) and Optically Stimulated Luminance (OSL) dosimeters ( Units) placed throughout the ISS Requires up/down mass and pre/post flight hardware processing Data only available after ground analysis Crew Passive Dosimeter (CPD) Currently used as the dose of record by the Radiation Health Officer (RHO) Identical to the RAM but crew worn Radiation Environment Monitor possible advantages for future operational usage: Provides immediate data availability enabling the assessment of crew radiation exposure in near real time (via ground software). Ground analysis of pixel pattern and energy deposition allows determination of particle type (passives do not), energy, and dose quantities. Since the data is available near real-time and it will run continuously, utilization of this payload will eliminate the need for frequent up/down mass Provides a reduction in crew time associated with deployment/retrieval of the current passive units. Provides advanced capability with low mass/power/volume.

NASA MSFC Mission Operations Laboratory MSFC Page 4 Radiation Environment Monitor Hardware Consists of a Radiation Environment Monitor Kit containing five Radiation Environment Monitors that are the size of a typical USB thumb drive. The Radiation Environment Monitors contain detection pixels with integrated electronics embedded in each pixel to detect radiation strikes. Radiation Environment Monitor Kit P/N SJG S/N 1001 Front and Back of Radiation Environment Monitors

NASA MSFC Mission Operations Laboratory MSFC Page 5 Radiation Environment Monitor Software T61p Laptop P/N SEG USB Type A Software is part of Station Support Computer (SSC) software load in the Station Apps Folder. Crewmember selects Station Apps shortcut on desktop and double clicks “Pixelman”. Radiation Environment Monitor software will be running when launched and minimized at bottom of window. Crew member verifies software status is ‘Running’. The software will automatically restart if the SSC is rebooted or taken off line by the crew.

NASA MSFC Mission Operations Laboratory MSFC Page 6 Radiation Environment Monitor Activity Details Crew Ops : Crew involvement is extremely minimal for this payload. Crew is required to plug the Radiation Environment Monitor (S/N 1003, 1004, 1005, 1007 and 1009) into any SSC laptop throughout ISS, verify that the software is running, select Time Scale, minimize application window. Any request for crew time is worked via the OCR process. Planning Constraints: Payload will run continuously once installed and software running. Data Requirements: Data is available on the Operations Local Area Network (Ops LAN) and will be downlinked daily via Onboard Communication Adapter (OCA). No POIC involvement is required. Stowage Requirements: Radiation Environment Monitor Kit will require stowage. Operation Interfaces: The PD (MCC-H SRAG) will submit Flight Notes, including POD, OC, and Ops Plan for review & concurrence, for any nominal updates to their configuration files. POIC owns all crew ops and crew procedures, and if there were any off-nominal responses those would be worked through POIC via the OCR process.

NASA MSFC Mission Operations Laboratory MSFC Page 7 ACRONYMS CPDCrew Passive Dosimeter EVA Extravehicular Activity OCAOnboard Communication Adapter Ops LANOperations Local Area Network OSLOptically Stimulated Luminance Dosimeter POICPayload Operations Integration Center PODPayload Operations Director RAMRadiation Area Monitor RHORadiation Health Officer SSCStation Support Computer SRAGSpace Radiation Analysis Group TLDThermoluminescent Dosimeter