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Dr Ana Firan (NASA/JSC)28/11/2018, 09:30
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Marco Vuolo (ESA)28/11/2018, 09:55
The presentation will focus on the recent Geant4 related activities started and performed by ESA for the planning of space and planetary exploration missions.
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New developments and improvements of some of the ESA Geant4 tools will be presented.
The ESA tools list includes: GRAS (3D radiation analysis), MULASSIS (1D radiation analysis), MAGNETOCOSMICS (cosmic ray rigidity) and PLANETOCOSMICS... -
Masanobu Ozaki (JAXA)28/11/2018, 10:20
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Mark Looper (The Aerospace Corporation)28/11/2018, 11:15
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Mark Looper (The Aerospace Corporation)28/11/2018, 11:40
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Patrick Dunn (University of California, Berkeley)28/11/2018, 12:05
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...
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Audrey Martin (The University of Tennessee )28/11/2018, 13:45
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...
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Peter Wass (University of Florida)28/11/2018, 14:10
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...
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Dennis Wright (SLAC)28/11/2018, 14:35
The space elevator is a means for moving large amounts of mass into space at relatively low cost. Modern concepts of this structure involve a gravitationally stabilized thin tether made of strong materials such as carbon nanotubes or single-crystal graphene, extending to an altitude of 100,000 km. Along the full length of the tether are many hazards, such as space debris, solar storms,...
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Robert Reed (ISDE/Vanderbilt University), Robert Reed (Vanderbilt University)28/11/2018, 15:30
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Kristine Ferrone28/11/2018, 15:55
The concept of active magnetic shielding is to use high-temperature superconducting coils to induce very high magnetic fields around a human spacecraft. The induced magnetic field will deflect incoming charged particles (solar particles and galactic cosmic rays), thereby reducing the particle flux and radiation dose to astronauts behind the shield.
The goal of this project is to create a...
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Makoto ASAI (SLAC)29/11/2018, 09:30
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Dennis Wright (SLAC)29/11/2018, 09:55
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Dennis Wright (SLAC)29/11/2018, 10:20
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29/11/2018, 10:45
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Marco Vuolo (ESA)29/11/2018, 11:30
Science missions are demanding progressively more detailed simulations increasing the computational time due to the complexity of the 3D geometrical models. Generally, in space dosimetry calculations, the sensitive part of the electronic components is significantly small compared to spacecraft size. In such cases the reverse Monte Carlo (RMC) method, also known as the adjoint Monte Carlo, can...
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Dr Wade Duvall (Naval Research Laboratory)29/11/2018, 11:55
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...
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Xiaobo Li (Institute of High Energy Physics, CAS)29/11/2018, 12:20
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...
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Chad Lindstrom29/11/2018, 14:00
Monte Carlo methods to model radiation transport are now extensively used to model detector efficiency and response for space radiation sensors. Often, the modeling efforts focus on the response of the sensor to isotropic or unidirectional fluxes at low to moderate counting rates. This is acceptable for situations where the design requirements of the sensor allow it to be operated in these...
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Thomas Brall (Helmholtz Zentrum München (HMGU), Institute of Radiation Protection (ISS), Neuherberg, Germany)29/11/2018, 14:25
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...
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Dr Laurence Thomsen (NASA LaRC)29/11/2018, 14:50
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...
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Dr Alexander Henderson (University of Southern Mississippi)29/11/2018, 15:45
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. ...
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Dr Xiaoning Ding (Mayo Clinic Arizona)29/11/2018, 16:10
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...
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Dr Shogo Okada (KEK), Prof. Takashi Sasaki (KEK)30/11/2018, 09:30
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,...
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Robert Reed (ISDE/Vanderbilt University), Robert Reed (Vanderbilt University)30/11/2018, 09:55
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Makoto ASAI (SLAC)30/11/2018, 10:20
The Fortran code system Penelope performs Monte Carlo simulation of coupled electron-photon transport in arbitrary materials for a wide energy range. Penelope implements the most reliable interaction models that are currently available, limited only by the required generality, and gives results in good agreement with a variety of experimental data. We present a translation of the latest...
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Dr Ryan Rios30/11/2018, 11:15
In view of manned missions targeted to the Moon and Mars, for which radiation exposure is one of the greatest challenges, it is of fundamental importance to have tools, which allows the determination of the particle flux and spectra at any time during the mission from transit trajectory to planetary surface operations.
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The environment at the surface is, apart from occasional solar energetic... -
Masanobu Ozaki (JAXA), Valentina Fioretti (INAF/IASF Bologna)30/11/2018, 11:40
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Makoto ASAI (SLAC)30/11/2018, 12:20
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Valentina Fioretti (INAF/IASF Bologna)
The HITOMI Soft X-ray Spectrometer (SXS), despite its short life, provided more than 300 ks of Non X-ray Background (NXB) data in Low Earth Orbit (LEO) and a unique opportunity for validating the Geant4 simulation of an X-ray micro-calorimeter background against in-flight real data. All future X-ray missions carrying x-ray micro-calorimeters (e.g. ATHENA, XRISM) will certainly benefit from the...
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Dr Mark Looper (The Aerospace Corporation)
Geant4 is a vital tool for understanding and calibrating the response of space-borne radiation sensors at The Aerospace Corporation, and for understanding the space radiation environment that they measure. In the year and a half since the last Geant4 Space Users Workshop, the greatest fraction of our effort addressing sensor response has gone into the implementation and benchmarking of the...
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Dr Laurence Thomsen (NASA LaRC)
Dr. D. Laurence Thomsen III
NASA Langley Research Center, Advanced Materials and Processing Branch, 6A West Taylor Street, Hampton, VA 23681. Ph: 757-864-4211, Fax: 757-864-8312, Email: d.l.thomsen@nasa.gov.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...
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Dr Ana Firan (NASA/JSC)
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