English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Solar flares are some of the most energetic events in the solar system andcan be studied to investigate the physics of plasmas and stellar processes. Oneinteresting aspect of solar flares is the presence of accelerated (nonthermal)particles, whose signatures appear in solar flare hard X-ray emissions. Debatehas been ongoing since the early days of the space age as to how theseparticles are accelerated, and one way to probe relevant accelerationmechanisms is by investigating short-timescale (tens of milliseconds)variations in solar flare hard X-ray flux. The Impulsive Phase Rapid EnergeticSolar Spectrometer (IMPRESS) CubeSat mission aims to measure these fast hardX-ray variations. In order to produce the best possible science data from thismission, we characterize the IMPRESS scintillator detectors using Geant4 MonteCarlo models. We show that the Geant4 Monte Carlo detector model is consistentwith an analytical model. We find that Geant4 simulations of X-ray and opticalinteractions explain observed features in experimental data, but do notcompletely account for our measured energy resolution. We further show thatnonuniform light collection leads to double-peak behavior at the 662 keV$^{137}$Cs photopeak and can be corrected in Geant4 models and likely in thelab.

Geant4 Modeling of a Cerium Bromide Scintillator Detector for the IMPRESS CubeSat Mission