Status of Trigger Rate Studies Analysis Group meeting 9 December 2002 D. Wren S. Ritz.

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Presentation transcript:

Status of Trigger Rate Studies Analysis Group meeting 9 December 2002 D. Wren S. Ritz

Moving from pdrApp to Gleam: Fluxes and Trigger Rates Purpose: we want to use GLEAM for background studies –onboard filter development –revisit ground-based background rejection so the first step is to verify the implementation of the background fluxes. => compare with pdrApp Look at backgndmaxpdr (orbit max) and backgndavgpdr (orbit average) composite fluxes: –Compare Fluxes (Gleam vs. pdrApp) –Compare L1T rates (Gleam vs. pdrApp) Tools: –Use rootplot (within FluxSvc package) to plot fluxes –Use Gleam event tuples to get L1T trigger rates

backgndavgpdr flux comparison cremeavg in Gleam v3r2 low by factor of 100 – fixed? Stay tuned! Gleam v3r2pdrApp No CR electrons yet in Gleam Otherwise, apparent agreement

backgndmaxpdr flux comparison Otherwise, apparent agreement… Gleam pdrApp Gleam still lacks CR electron flux

backgndmaxpdr fluxes from rootplot Flux TypeIntegrated Flux (kHz/m^2) in Gleam Integrated Flux (kHz/m^2) in pdrApp backgndmaxpdr 9.9 chimemax4.2 albedo_proton_max2.6 albedo_gamma0.92 electronmaxX0.043 albedo_electronpositron _total 2.2 HOWEVER…

Current Backgndmaxpdr L1T Rates GleamTotalchimemaxalbedo_p_maxalbedo_gammaelectronmaxalbedo_e+e- Flux (kHz/m^2) NA2.2 L1T rate (Hz) NA1782 L1T (fract) NA0.35 TKR rate (Hz) NA9.7 CAL-LO rate (Hz) NA14 CAL-LO and NOT TKR NA0 CAL-HI rate (Hz) NA0 CAL-HI and NOT TKR0000NA0 pdrApp Flux (kHz/m^2) L1T rate (Hz) L1T (fract) TKR rate (Hz)11221 CAL-LO rate (Hz)5297 CAL-LO and NOT TKR1913 CAL-HI rate (Hz)84 CAL-HI and NOT TKR10 Rates by Trigger Type vs. Flux Source for Gleam and pdrApp There is a problem with the chimemax rate (also a factor ~100 low)

Summary Most of the flux components look OK. Tools are very useful. However, don’t use GLEAM yet for background rate studies: –Still a problem with orbit avg and orbit max CR proton fluxes, and CR electron fluxes not yet implemented. Today’s mystery: why the chimemax rootplot looks OK, but resulting rate is still low. Could be gleam package use problem (still loading old dll?). [Single-event display used to confirm this is not some obvious problem such as sphere size, etc. Events look OK, just wrong rate.] Should be sorted out this week. Nested composite sources not yet working (lower priority).