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CRaTER Data Products & Production Pipeline

CRaTER Data Products & Production Pipeline. Larry Kepko Boston University Center for Space Physics CRaTER PDR. Calibration. By exposing the detectors to beams of known energies, we can determine the response. Current From Detector. Energy of Incident Particle. Calibration.

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CRaTER Data Products & Production Pipeline

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  1. CRaTER Data Products&Production Pipeline • Larry Kepko • Boston University Center for Space Physics • CRaTER PDR

  2. Calibration • By exposing the detectors to beams of known energies, we can determine the response. Current From Detector Energy of Incident Particle

  3. Calibration • We will calibrate the detectors at 3 different beam facilities, each with different energy ranges and species. • Timetable TBD • Spot-checking

  4. Facility Beam Properties LIIF 9-55 MeV H 19 or 32.5 MeV/nucleon He to Ne HIIF 4.5 MeV/nucleon He to Bi 10 MeV/nucleon B to Xe 14.5-16 MeV/nucleon C to Xe Calibration • 88” Cyclotron, Lawrence Berkeley National Laboratory

  5. Facility Beam Properties Booster up to 1 GeV H Booster up to 1 GeV/nucleon Fe Calibration • NASA Space Radiation Laboratory at Brookhaven National Laboratory

  6. Facility Beam Properties IUCF 30 - 200 MeV H Calibration • Indiana University

  7. Description Level 0 Unprocessed instrument data (pulse height at each detector), secondary science (discarded events), housekeeping. Level 1 Science data depacketed, 1-s resolution. Ancillary data pulled in (spacecraft attitude, calibration files, etc) Level 2 Pulse heights converted into energy deposited in each detector. Calculation of Si LET spectra. Level 3 Separate out magnetotail, foreshock and ‘GCR’ data. Level 4 Calculation of TEP LET, incident energies and particle flux. Pull in GCR data from other spacecraft (e.g. ACE). CRaTER Data Products

  8. LRO MOC sFTP Primary/secondary science CRaTER SOC Housekeeping Validation To Level 1 Processing Level 0 PDS L0 Archive

  9. Level 0 Science Unprocessed instrument data (pulse height at each detector), secondary science (discarded events, etc.). Up to 25 packets of up to 48 events per second Level 0 Housekeeping Bias voltage, temperature, etc., 16-s resolution Level 0 Data Products

  10. Level 1 Depacket, create 1-s data LRO MOC sFTP Orbit & Attitude CRaTER SOC Calibration Files PDS L1 Archive To Level 2 Processing

  11. Level 1 Science Unprocessed instrument data (pulse height at each detector), depacketed. Creation of 1-s data. Secondary science placed in 1-s data header. Level 1 Housekeeping Bias voltage, temperature, etc., 16-s resolution Level 1 Data Products

  12. Calculate Si LET Level 2 Convert to energy deposited QL Plots Events of Interest PDS L2 Archive To Level 3 Processing

  13. Level 2 Science Energy deposited in each detector and LET. QL Plots TBD Events of Interest e.g., SEP events. Level 2 Data Products

  14. Level 3 Region Separation Magnetotail Foreshock GCR SEP Events To Level 4 Processing

  15. L3 Region Data separated into 3 files (or, alternately, 1 file with a data flag) identifying what data was obtained while the moon was in the a) magnetosphere, b) foreshock and c) pure GCR L3 SEP Data containing SEP events (definition TBD) are separated as well Level 3 Data Products

  16. Level 4 Calculate LET in TEP ? Modeling Community GCR Spectrum Calculate Particle Flux

  17. Timetables • Level 2 data produced immediately upon verification of Level 1 data. • Only involves application of pre-flight calibration curves and simple LET calculations. • GCR LET spectrum requires time • The longer the better • Probably something useful after 3-6 months

  18. Back-up Slides

  19. LET Calculation Linear Energy Transfer (LET) is the energy deposition in matter per unit length

  20. LET Calculation LET in the Silicon detectors can be calculated directly

  21. LET Calculation E0 LET in the TEP requires E0 and Ef Ef

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