Page 1 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball Preliminary Results of ISS Active Radiation Instruments from 1st ICCHIBAN (InterComparison for Cosmic-ray with Heavy-Ion Beams At NIRS) Tad Shelfer * Eddie Semones Neal Zapp Fadi Riman Joel Flanders Mark Weyland Mike Golightly Space Radiation Analysis Group NASA - Johnson Space Center Houston, TX 77058, USA * Sustaining Engineer, tad.shelfer1@jsc.nasa.gov Japanese symbol Image of Cherry Blossums in Japan page 2 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball Introduction • Introduction to the ISS Tissue Equivalent Proportional Counter (ISS TEPC) • Brief description of the exposures measured with the ISS TEPC • Preliminary results of the ISS TEPC measurements • Introduction to the Intra-Vehicular Charged Particle Directional Spectrometer (IV-CPDS) • Brief description of the exposures measured with the IV-CPDS • Preliminary results of the IV-CPDS measurements • Summary and Conclusions Page 3 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball Neal on street in Japan First time in Japan…”go find cold soba!” Page 4 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball After first Earthquake…”Maybe these helmets are a good idea after all!” Image of Neal with hardhat Page 5 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball Grand Champion - Guest House Marked up image Page 6 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball Image of ISS TEPC with labels: power/data cable, seat track connector, detector cable, detector seat track connector, detector, spectometer, RS-232 Cable ISS TEPC Page 7 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station Image of ISS TEPC Spectrometer with labels: Dual Multi-Channel Analyzer Design 1024 Channels of Low-Gain Data 256 Channels of High-Gain Data RS-232 and 1553 Communication Ports 120 V or 28 V Power Operation NASA Meatball Page 8 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball Image of Proportional Counter Detector. Fill Gas: 2 Torr Propane. Dual Chamber Design. Main Detector Chamber. Small Diagnostic Chamber. Represents a 2 micrometer diameter volume of human tissue Page 9 Space Radiation Analysis Logo 7th Workshop on Radiation Monitoring for the International Space Station Image of proportional counter Page 10 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball ISS TEPC Exposure Summary 398 MeV Carbon Beam graph (Run7032-25-20-15-10-50510152025-25-20-15-10-50510152025X (mm)) Run7032Front 398 MeV Carbon Beam Run 7032 – 0 Degrees Centered (30 minutes) Run 7033 – 30 Degrees Centered (30 minutes) Run 7034 – 90 Degrees Centered (20 minutes) Run 7035 – 0 Degrees X+15 Z+15 (20 minutes) 388 MeV Iron Beam graph (Run 7224-25-20-15-10-50510152025-25-20-15-10-50510152025X (mm)) Run 7224Front 388 MeV Iron Beam Run 7224 – 0 Degrees Centered (30 minutes) Run 7225 – 30 Degrees Centered (20 minutes) Run 7226 – 90 Degrees Centered (15 minutes) Run 7227 - 0 Degrees X+15 Z+15 (20 minutes) Page 11 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball ISS TEPC 400 MeV Carbon 0 Degrees graph Graph Labels N(y) 0 - 25000 and y (keV/µm) 0.1 - 10000 Page 12 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball ISS TEPC 400 MeV Carbon 0 Degrees graph The area under this curve delimited by any two values of y is proportional to the fraction of events in that range of lineal energy. Graph Labels y*f(y) 0 - 1.8 and y (keV/µm) 0.1 - 10000 Page 13 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball ISS TEPC 400 MeV Carbon 0 Degrees graph The area under this curve delimited by any two values of y is proportional to the fraction of events in that range of lineal energy. Graph Labels y*f(y) 0 - 1.8 and y (keV/µm) 0.1 - 10000 Page 14 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball ISS TEPC 400 MeV Carbon 30 Degrees graph Graph Labels N(y) 0 - 20000 and y (keV/µm) 0.1 - 10000 Page 15 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball ISS TEPC 400 MeV Carbon 30 Degrees graph The area under this curve delimited by any two values of y is proportional to the fraction of events in that range of lineal energy. Graph Labels y*f(y) 0 - 1.8 and y (keV/µm) 0.1 - 10000 Page 16 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball ISS TEPC 400 MeV Carbon 30 Degrees The area under this curve delimited by any two values of y is proportional to the fraction of events in that range of lineal energy. Graph Labels y*d(y) 0 - 1.8 and y (keV/µm) 0.1 - 10000 Page 17 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball ISS TEPC 400 MeV Carbon 90 Degrees graph Graph Labels N(y) 0 - 14000 and y (keV/µm) 0.1 - 10000 Page 18 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball ISS TEPC 400 MeV Carbon 90 Degrees graph The area under this curve delimited by any two values of y is proportional to the fraction of events in that range of lineal energy. Graph Labels y*f(y) 0 - 1.8 and y (keV/µm) 0.1 - 10000 Page 19 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball ISS TEPC 400 MeV Carbon 90 Degrees graph The area under this curve delimited by any two values of y is proportional to the fraction of events in that range of lineal energy. Graph Labels y*d(y) 0 - 1.8 and y (keV/µm) 0.1 - 10000 Page 20 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball ISS TEPC 400 MeV Carbon + 15x + 15z graph Graph Labels N(y) 0 - 9000 and y (keV/µm) 0.1 - 10000 Page 21 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball ISS TEPC 400 MeV Carbon +15X + 15Z graph The area under this curve delimited by any two values of y is proportional to the fraction of events in that range of lineal energy. Graph Labels y*f(y) 0 - 1.2 and y (keV/µm) 0.1 - 10000 Page 22 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball ISS TEPC 400 MeV Carbon +15x + 15z graph The area under this curve delimited by any two values of y is proportional to the fraction of events in that range of lineal energy. Graph Labels y*d(y) 0 - 1.4 and y (keV/µm) 0.1 - 10000 Page 23 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball ISS TEPC 400 MeV Iron 0 Degrees graph Graph Labels N(y) 0 - 3000 and y (keV/µm) 0.1 - 10000 Page 24 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball ISS TEPC 400 MeV Iron 0 Degrees graph The area under this curve delimited by any two values of y is proportional to the fraction of events in that range of lineal energy. Graph Labels y*f(y) 0 - 4.5 and y (keV/µm) 0.1 - 10000 Page 25 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball ISS TEPC 400 MeV Iron 0 Degrees graph The area under this curve delimited by any two values of y is proportional to the fraction of events in that range of lineal energy. Graph Labels y*d(y) 0 - 4.5 and y (keV/µm) 0.1 - 10000 Page 26 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball ISS TEPC 400 MeV Iron 30 degrees graph Graph Labels N(y) 0 - 1600 and y (keV/µm) 0.1 - 10000 Page 27 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball ISS TEPC MeV Iron 30 Degrees graph The area under this curve delimited by any two values of y is proportional to the fraction of events in that range of lineal energy. Graph Labels y*f(y) 0 - 5 and y (keV/µm) 0.1 - 10000 Page 28 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball ISS TEPC 400 MeVIron 30 Degrees graph The area under this curve delimited by any two values of y is proportional to the fraction of events in that range of lineal energy. Graph Labels y*d(y) 0 - 6 and y (keV/µm) 0.1 - 10000 Page 29 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball ISS TEPC 400 MeV Iron 90 Degrees graph Graph Labels N(y) 0 - 2500 and y (keV/µm) 0.1 - 10000 Page 30 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball ISS TEPC 400 MeV Iron 90 Degrees graph The area under this curve delimited by any two values of y is proportional to the fraction of events in that range of lineal energy. Graph Labels y*f(y) 0 - 4 and y (keV/µm) 0.1 - 10000 Page 31 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball ISS TEPC 400 MeV Iron 90 Degrees graph The area under this curve delimited by any two values of y is proportional to the fraction of events in that range of lineal energy. Graph Labels y*d(y) 0 - 6 and y (keV/µm) 0.1 - 10000 Page 32 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball ISS TEPC 400 MeV Iron +15x +15z graph Graph Labels N(y) 0 - 900 and y (keV/µm) 0.1 - 10000 Page 33 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball ISS TEPC 400 MeV Iron +15x +15z graph The area under this curve delimited by any two values of y is proportional to the fraction of events in that range of lineal energy. Graph Labels y*f(y) 0 - 2.5 and y (keV/µm) 0.1 - 10000 Page 34 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball ISS TEPC 400 MeV Iron +15x + 15z graph The area under this curve delimited by any two values of y is proportional to the fraction of events in that range of lineal energy. Graph Labels y*d(y) 0 - 3 and y (keV/µm) 0.1 - 10000 Page 35 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball ISS TEPC 1stICCHIBAN Summary 1st ICCHIBAN Run Total Events Mean y Mean y Mean Q Absorbed Dose Absorbed Dose Absorbed Dose Per Recorded Frequency Dose (Gy) Equivalent (Sy) Event (nGy/Event) ISS TEPC 0 Degree 400 MeV Carbon 172340 11.76 13.49 2.82 1.20E-04 3.37E-04 2.96 ISS TEPC 30 Degree 400 MeV Carbon 178683 11.47 14.19 3.57 1.37E-04 4.48E-04 2.45 ISS TEPC 90 Degree 400 MeV Carbon 119718 11.81 14.72 4.67 1.04E-04 4.86E-04 2.20 ISS TEPC +15x +15z 400 MeV Carbon 99839 11.01 15.31 3.05 6.48E-05 1.97E-04 2.79 ISS TEPC 0 Degree 400 MeV Iron 168646 222.53 235.63 18.34 2.23E-03 4.10E-02 64.29 ISS TEPC 30 Degree 400 MeV Iron 104182 227.25 240.85 16.94 1.60E-03 2.71E-02 55.97 ISS TEPC 90 Degree 400 MeV Iron 71666 265.91 322.89 14.24 1.44E-03 2.06E-02 57.81 ISS TEPC +15x +15z 400 MeV Iron 102918 217.55 250.80 19.11 1.33E-03 2.55E-02 62.88 Page 36 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball image of IV-CPDS radiation instrument Labels on image: Seat Track Mounting Assembly. Power/Data Cable. Spectrometer Page 37 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball Diagram of CPDS Detector Stack. Detector Types A - 1 mm thick Si. B - 5 mm thick Si/Li. C - Cerenkov. PSD- 24X24 Cells. Stack A1 Detector, PSD1 Detector, PSD2 Detector, A2 Detector, B1/B2 Detectors, B3/B4 Detectors, B5/B6 Detectors, PSD3 Detector, A3 Detector, C Detector Page 38 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball IV-CPDS Exposure Summary 398 MeV Carbon Beam graph Run7032-25-20-15-10-50510152025-25-20-15-10-50510152025X (mm) Run 7032 Front 398 MeV Carbon Beam Run 7036 – 0 Degrees Centered (40 minutes) Run 7037 – 30 Degrees Centered (40 minutes) 388 MeV Iron Beam graph Run 7224-25-20-15-10-50510152025-25-20-15-10-50510152025X (mm) Run7224 Front 388 MeV Iron Beam Run 7232 – 0 Degrees Centered (10 minutes) Run 7233 – CH2 Fragmentation (30 minutes) IV-CPDS X-25mm CH2 Block 50cm upstream of IV-CPDS Page 39 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball Image of Radiation Instrument Page 40 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA MeatBall IV-CPDS 400 MeV Carbon 0 Degrees graph Graph Labels N(L) 0 - 25 and L (keV/µm) 0.01 - 100.00 Page 41 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball IV-CPDS 400 MeV Carbon 0 Degrees (corrected) graph Graph Labels N(L) 0 - 25 and L (keV/µm) 0.01 - 100.00 Page 42 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball design of CPDS - drawing Page 43 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball IV-CPDS 400 MeV Carbon 30 Degrees graph Graph Labels N(L) 0 - 14 and L (keV/µm) 0.01 - 100.00 Page 44 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball IV-CPDS 400 MeV Iron 0 Degrees graph Graph Labels N(L) 0 - 90 and L (keV/µm) 0.01 - 100.00 Page 45 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball IV-CPDS 400 MeV Iron Fragmentation graph Graph Labels N(L) 0 - 60 and L (keV/µm) 0.01 - 100.00 Page 46 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball IV-CPDS 1st ICCHIBAN Summary 1st ICCHIBAN Run Total Events Absorbed Absorbed Dose Per Recorded Dose (Gy) Event (nGy/Event) IV-CPDS 0 Degree 400 MeV Carbon 1856 4.03E-06 2.17 IV-CPDS 30 Degree 400 MeV Carbon 1702 3.03E-06 1.78 IV-CPDS 0 Degree 400 MeV Iron 560 3.49E-06 6.23 IV-CPDS 400 MeV Iron Fragment 1356 4.80E-06 3.54 Note: IV-CPDS LET Max = ~38 keV/µm Page 47 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball Summary and Conclusions ISS TEPC: • Investigate anomalous reset problem • Lower detector threshold IV-CDPS: • Investigate dead time problem • Investigate double-peak problem • Lower detector gain settings Recommendations for 3rd ICCHIBAN Measurement: • Larger beam size (Biology room?) • Proton Beam Run • Iron Fragment Beam Run Page 48 Space Radiation Analysis Group Logo 7th Workshop on Radiation Monitoring for the International Space Station NASA Meatball Acknowledgements • We gratefully acknowledge NIRS for the use of the HIMAC facility in support of the ICCHIBAN investigations.