CRaTER TIM April 2005 Proj. Sci. Justin Kasper (MIT) Galactic Cosmic Rays and Solar Flares Justin Kasper (MIT) CRaTER Project Scientist LRO/CRaTER TIM.

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Presentation transcript:

CRaTER TIM April 2005 Proj. Sci. Justin Kasper (MIT) Galactic Cosmic Rays and Solar Flares Justin Kasper (MIT) CRaTER Project Scientist LRO/CRaTER TIM April 14, 2005

CRaTER TIM April 2005 Proj. Sci. Justin Kasper (MIT) Outline Background Radiation Sources –Galactic cosmic rays –Solar energetic particles Issues Simulations Questions

CRaTER TIM April 2005 Proj. Sci. Justin Kasper (MIT) Background PhD Physics, MIT Currently –Research Scientist, MIT –Project Scientist, CRaTER –Visiting (BU) Design, calibration plasma Faraday cup for Triana Other work: –Calibration and analysis of Wind spacecraft data –Spacecraft formations for Solar Imaging Radio Array –Ground-based radio telescope arrays

CRaTER TIM April 2005 Proj. Sci. Justin Kasper (MIT) Crab Nebula (ESO) Galactic Cosmic Rays Advanced Composition Explorer

CRaTER TIM April 2005 Proj. Sci. Justin Kasper (MIT) January 15, 2005 Solar minimum –Few sunspots –Few flares –Quiet corona Giant sunspot 720 –Sudden appearance –Strong magnetic field –Very large –On west limb by January 20 Image credit: J. Koeman

CRaTER TIM April 2005 Proj. Sci. Justin Kasper (MIT) January 20, 2005 dt < 30 minutes

CRaTER TIM April 2005 Proj. Sci. Justin Kasper (MIT) Issues What are the expected counting rates in the detectors under different conditions? What is the optimum trade between shielding the top detectors and maximizing the field of view of the lower detectors? How well can the instrument distinguish energy and species?

CRaTER TIM April 2005 Proj. Sci. Justin Kasper (MIT)

Observed peak spectrum

CRaTER TIM April 2005 Proj. Sci. Justin Kasper (MIT) Modeled Flux Proton Energy [MeV] Proton Flux [p s -1 cm -2 sr -1 MeV -1 ]

CRaTER TIM April 2005 Proj. Sci. Justin Kasper (MIT) Predicted event rate

CRaTER TIM April 2005 Proj. Sci. Justin Kasper (MIT) Predicted Deposition Energy Deposited in D1 [MeV]

CRaTER TIM April 2005 Proj. Sci. Justin Kasper (MIT) Questions for LRO Telemetry: Max event rate 1250 events/sec on 1553 CRaTER (LRO) operational during flares Measurements during transit for calibration purposes? Occasional s/c roll for calibration