1 / 36

IDEE, The Electron Spectrometer for the Taranis Mission

IDEE, The Electron Spectrometer for the Taranis Mission J.-A. Sauvaud 1 , P. Devoto , A . Fedorov 1 , G. Orttner 1 , O. Chasselat 1 , K. Wong 1 , L . Prech 2 , Z. Nemecek 2 , 1 IRAP/CNRS-U . of Toulouse 2 Charles University, Prague.

fawn
Download Presentation

IDEE, The Electron Spectrometer for the Taranis Mission

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. IDEE, The Electron Spectrometer for the Taranis Mission J.-A. Sauvaud1, P. Devoto, A. Fedorov1, G. Orttner1, O. Chasselat1, K. Wong1, L. Prech2, Z. Nemecek2, 1 IRAP/CNRS-U. of Toulouse 2 Charles University, Prague Chibis international workshop, Tarusa, 13-15 february 2013

  2. IDEE conception 3 objectives: -Pitch-angle Distribution of Radiation Belt Electrons (wave particle interactions) -Lightning-induced Electron Precipitation (LEP)‏ -Relativistic Runaway Electrons (RRE)

  3. DEMETER and TARANIS The spectrometers uses semi-conductors as particle detectors W= 3.5 eV/e--hole pair

  4. WAVE PARTICLE INTERACTIONS 1. Cyclotron resonance

  5. ELECTRON FLUXES AT 650 KM ALTITUDE (200 keV) NWC Electron interaction with VLF

  6. ‘Cyclotron’ induced structures Note the large difference of slopesin the innerbelt as compared to the ‘cyclotron slope’ Effect of VLF transmitter 19.8 kHz Sauvaud et al., 2008

  7. Drift resonance: ULF-particle INTERACTIONS Electrons Protons

  8. LIGHTENING ELECTRON PRECIPITATION / VLF-ELECTRON INTERACTION 2 s Voss et al, Nature, 1984.

  9. Lightning induced electron precipitation (DEMETER - above Europe: weak energy, critical time resolution of electron data ) DEMETER

  10. Distribution of lightnings, winter 2008-2009

  11. ELECTRONS

  12. TGF RHESSI 10 msec Υspectrum Parent electrons: dJ/dE=2.2 10-3exp(-E/7.2) Terrestrial gamma flashes energyspectrum

  13. Computed TGF Electrons Lehtinen et al., 2010; Carlson et al., 2011

  14. Carlson et al., 2011

  15. SAMPEX electronburstspossiblyrelated to TGF Lehtinen et al.

  16. Expected TGF electrons Electron fluxes Part/(cm2.s.sr.keV) RRE DEMETER The electronsthat escape to satellie altitude are mostlikelysecondaryelectronsproduced by TGF

  17. Can a detector like IDP (DEMETER) do that? Relativistic Runaway Electrons (RRE) Not enough Geometrical Factor Lightning-induced Electron Precipitation (LEP)‏ Time resolution not adequate Pitch-angle Distribution of Radiation Belt Electrons No angular channels

  18. The resulting IDEE sensor for TARANIS

  19. IDEE 2 detector planes: Si + CdTe (coincidence for direction), large section of CdTe for RRE

  20. ADDING SEPARATION INTO THE COLLIMATOR = angularseparation of lowenergyelectrons

  21. Objectif - Runaway Relativistic Electrons Where we can distinguish a RRE spectrum from the bkg electrons. (After DEMETER data)‏ Possible RRE spectrum (Red)‏

  22. Runaway Relativistic Electrons Possible RRE spectrum (Red)‏ Detection of RRE 8 horizontal bands, 8 CdTe cells in each thickness 6mm to stop electrons up to 4 Mev

  23. IDEE-TARANIS

  24. IDEE

  25. CdTe

  26. CdTe

  27. Response to RRE event Measurable signal for CdTe only Geant-4 simulation 20 counts/event

  28. Response to associated Gamma rays when gamma only are received, the measured signal is very weak. Gammas will not disturbed electron measurements. Geant-4 simulation

  29. STATUS OF THE EXPERIMENT Sensor head design: performed Electronic design: performed. ASIC developed DPU: performed (Charles university) Modes: defined Burst trigger: ready Thermal study: made EQM: made

More Related