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Total Dose

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Total Dose Working Team

keV–MeV electrons, keV–GeV protons, GCR ions

Team Leads: I. Jun, T. Guild, M. Xapsos
Participants: Anastasios Anastasiadis · Michael Balikhin* · Yaireska Collado-Vega* · Natalia Ganushkina* · Tim Guild · Insoo Jun* · Daniel MatthiƤ* · Joseph Minow* · Alexis Rouillard · W. Kent Tobiska* · Brian Walsh · Michael Xapsos* · Yihua Zheng* ·
Laila Andersson · Steven Brown* · Janessa Buhler* · David Falconer · Manolis K. Georgoulis* · Daniel Heynderickx* · Masha Kuznetsova* · Kangjin Lee · Leila Mays* · James McCollough · Collin Meierbachtol* · Steven Morley* · Naoto Nishizuka · Athanasios Papaioannou · larry paxton* · Steve Petrinec* · DAVE PITCHFORD · Lutz Rastaetter* · Howard Singer* · KiChang Yoon ·

Communications: ccmc-total-dose@googlegroups.com (mailing list)

Google drive: documents for radiation and plasma effects teams


User Needs
User groups
  ⊕  Satellite designer (SD) for both commercial and government
  ⊕ Satellite operators and anomaly analysts (SOAA) for both commercial and government
  ⊕  Scientists (SCI) for both academia and government

Satellite design:
Need average spectrum along mission orbit/trajectory.

Satellite anomaly resolution:
Need the electron and (trapped+solar) proton spectrum along the mission orbit for few day leading to anomaly. Also need this information over history of mission to get a sense of whether time of anomaly was especially severe.


Working Team Goals

  ⊕  Define a metric or metrics that can be used to validate model outputs (in terms of total dose) with observations.
  ⊕  Then, the CCMC-LWS program would develop short-term or long-term plans to provide desired flight data to the community.


Working Team Deliverables

  ⊕  Define a metric or metrics that can be used to validate model outputs (in terms of total dose) with observations.
  ⊕  Then, the CCMC-LWS program would develop short-term or long-term plans to provide desired flight data to the community.


Physical Quantities and Metrics for Model Validation

Typical Model Outputs:
  ⊕ Particle spectra (flux and fluence)
  ⊕ Dose-depth curves
Identify metrics for each user group
SD: Dose-depth for the mission
SOAA: Dose-depth from launch to given time
SCI: proton and electron energy spectra
i. Electrons for >100 keV
ii. Protons for > 1 MeV

Error metrics to consider:
  ⊕  Long-term variability of trapped particles (data-based statistical analysis?) at different locations within planetary magnetosphere(s)
  ⊕  Most of the error metrics used for Internal Charging Working Group seem to apply here, too.
  ⊕  Statistics of solar proton environment: fluence spectra
  ⊕  Model predicted dose vs. measured dose (e.g., CRaTER instrument)
  ⊕  Measured solar proton event spectra for individual events vs. physical model prediction

Possibly Available Data Sources

  ⊕  Particle spectra (integral or differential) data from particle detector(s) at selected energies
  ⊕  Total dose data from dosimeter(s) at certain shielding depth(s)


Participating Models

Identify empirical models for each metric
  ⊕ Trapped: AE8/AP8; AE9/AP9/SPM; IGE2006/POLE (other older models are also available (e.g., CRESSELE, CRESSPRO, etc.))
  ⊕ Solar: King; JPL; ESP/PSYCHIC; SAPPHIRE
Identify physical model for each metric
  ⊕  Trapped: SALAMMBO; DREAM
  ⊕ Solar: SOLPENCO


List of Time Intervals in this Study

TBD: coordinate with other subtopic areas.


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