Geant4 has been an invaluable tool for understanding the data of MAVEN's Solar Energetic Particle (SEP) instrument. Raw data from SEP consists of two sets of counts across 256 bins. Each bin is essentially a counter corresponding to an event type and energy deposit (to be further explained in the presentation). Simulations were done in Geant4 in order to understand what differential energy...
One of the primary goals of The Mars Science Laboratory (MSL) rover is to understand current and historical water abundance on Mars (Grotzinger et al., 2012). A key instrument on MSL for accomplishing this goal is the Dynamic Albedo of Neutrons (DAN; Mitrofanov et al., 2012). The DAN instrument is sensitive to hydrogen (H) from the surface down to roughly 60 cm depth in the regolith. DAN...
At the core of the LISA gravitational wave observatory are isolated test masses that act as mirrors for a 2.5 million km baseline interferometer. The test masses must be kept in near pure free-fall: isolated from all unwanted force disturbances above the femto-Newton level. Electrical charging of the test masses produced by cosmic ray impacts gives rise to electrostatic forces that can reduce...
SoftWare for Optimization of Radiation Detectors (SWORD) is a CAD-like development tool and front end for several radiation transport codes. By default, SWORD ships with Geant4. SWORD also supports MCNP (radiation transport Monte Carlo developed at Los Alamos National Laboratory) and Denovo (deterministic discrete solver developed at Oak Ridge National Laboratory), both of which must be...
As China's first X-ray astronomical satellite, Insight-HXMT (Hard X-ray Modulation Telescope) successfully launched on Jun 15, 2017. HXMT carries three main payloads onboard: the High Energy X-ray telescope (HE, 20-250 keV, NaI(Tl)/CsI(Na)), the Medium Energy X-ray Telescope (ME, 5-30 keV, Si-Pin) and the Low Energy X-ray telescope (LE, 1-15 keV, SCD). The response function and efficient areas...
On the Zugspitze mountain (2650 m a.s.l.), Germany, the Institute of Radiation Protection operates a Bonner Sphere Spectrometer (BSS), running continuously since 2004, to measure the neutron energy distribution of secondary cosmic rays. These measurements are highly affected by various environmental parameters, and in particular by the amount of snow in the near environment. To quantify this...
NASA Shields-1 will be launched in the upcoming NASA CubeSat Launch Initiative (CSLI) ELaNaXIX Mission in December 2018. Shields-1 hosts a research payload experiment with 8 μdosimeters behind radiation shielding in slab geometries to make dose-depth curves. Shields-1 hosts atomic number (Z)-graded radiation shielding materials as part of the research payload with baseline aluminum materials...
GEANT4-dna-chemistry is a relatively new part of GEANT4 which allows a particle-in-cell (PIC) like simulation of water electrolysis products in liquid. By applying this to a microscopic geometric model of nuclear DNA we can estimate genetic damage caused by particle radiation. To apply this to macroscopic bodies we have furthered the PIC-like methodology by implementing repeated geometry. ...
Intensity modulated proton therapy (IMPT) is an advance form of proton therapy, in which tumor is irradiated by proton beamlet spot-by-spot and layer-by-layer through controlling the trajectory and energy of a focus beam of protons.1,2 While proton radiobiological effects depend primarily on their physical dose distribution, studies have showed that linear energy transfer (LET) plays an...
The MPEXS series is yet another software toolkit to simulate interactions between particles and matter. MPEXS was designed and built from scratch for GPU in the CUDA language, but still, algorithms and data necessary are taken from Geant4. MPEXS, the major part of the MPEXS series including handlers of geometry, material, incident particles, particle transportation, Electro-Magnetic physics,...
