1. Geant4 at INTA Status Report - 2015 S. Ibarmia, P. Gallego, C. Martínez 11 th Geant4 Space User’s Workshop Hiroshima, 26-28 Aug 2015

2. 11 th Geant4 Space Users’ Workshop Hiroshima, 26-28 Aug 2015 Areas where Geant4 is applied Since 2004 the INTA Space Environments & Effects group has worked to include Geant4 as base radiation simulation analysis tool. As a result, Geant4 is currently supporting activities in the following areas: Space radiation engineering  At S/C level  Shielding analysis, radiation level spec.  TID, DDD, fluxes, background noise, etc,  At instrument/payload level  Supporting design optimization  Shielding & effects estimation  Radiation sensor calibration and design Qualification of EEE components irradiation  Irradiation simulation. Dosimetry estimation  Effective damage at sub-component level R&D  Participation in ESA funded R&D specific activities related Geant4

3. 11 th Geant4 Space Users’ Workshop Hiroshima, 26-28 Aug 2015 Geant4 supported projects ESA Programs  Solar Orbiter – PHI instrument  BepiColombo – MIXS instrument ( ended )  ExoMars – RLS instrument  Plato ( new )  Athena ( new )  AIM / COPINS (new) National Nano/Micro missions  Nanosat-1B  OPTOS  XatCobeo ( ended ) & Humsat-D  Nanosat-2, MicroSat ( planned ) Other R&D  ESA ITT -> CIRSOS

4. 11 th Geant4 Space Users’ Workshop Hiroshima, 26-28 Aug 2015 ESA Solar Orbiter - PHI Polarimetric & Helioseismic Imager Development of a polarimetric telescope to study helioseismicity  Heritage from IMAX/SunRise  Launch foreseen for 2018+  State-of-the-art technologies  LiNBO 3 etalons to banpass (mAng) solar FeI line (6173 ang) Geant4 activities  Space engineering. Full S/C simulation  Full CAD to Geant4 modeling  Radiation levels for all PHI components  Support: simulation of p+ & HI test  LiNbO3 Etalons (5000V, roughness <20nm )  Dose profiling for all optical elements CAD Designs GEANT4 Models (CDR)

5. 11 th Geant4 Space Users’ Workshop Hiroshima, 26-28 Aug 2015 BepiColombo MPO G4 Model MIXS G4 Model Geant4 activities  Space engineering. Full S/C simulation  Shielding analysis  Radiation levels for INTA MIXS components  X-ray simulation  Calibration sources  Mercury X-ray fluorescence  X-ray focusing (optics grating MCP )  Simulation of the electron diverter (@optics) ESA BepiColombo - MIXS Mercury Imager X-ray Spectrometer INTA is resposible of the development of MIXS Focal Plane and E-Box  Status: FM completed and delivered to ESA MIXS FM

6. 11 th Geant4 Space Users’ Workshop Hiroshima, 26-28 Aug 2015 Raman Laser Spectrometer INTA is responsible of the development of the entire instrument  Launch foreseen for 2018+  Chemical composition analyser based on laser- induced raman spectroscopy Geant4 activity  Space engineering. Instrument simulation  Shielding analysis  Radiation levels at RLS components  Proton & RHU propagation for RLS components  Irradiation test simulation  Proton and HI tests: Lasers, diffracction gratings and optical lens ESA Exomars 2018 - RLS

7. 11 th Geant4 Space Users’ Workshop Hiroshima, 26-28 Aug 2015 Optical telescope array Detection of terrestrial exoplanets in the habitable zone of solar-type stars INTA is responsible of the development of all the telescopes FPA  Launch foreseen for 2024 Geant4 activity  Phase A/B:  Worst-case shielding analysis  Radiation levels at critical components  Main concern at this stage: Principal CCDs sensitive to TID ~5krad!! Weight budget on its limit for extra shielding ESA PLATO PLATO Telescope Geant4 Model

8. 11 th Geant4 Space Users’ Workshop Hiroshima, 26-28 Aug 2015 Next generation X-ray observatory  Mapping hot gas structures and determining their physical properties  Searching for supermassive black holes  INTA will be probably responsible of part of the FPA assembly and cryogenics system  Launch foreseen for 2028 – Halo orbit L2 Geant4 activities  TBD. Contracts under bidding process  Challenges for Geant4:  Simulation of background effects. Activation  Focusing of unwanted low-energy particles  Simulation of Silicon Pore Optics  Much to learn from Astro-H Geant4 work ESA ATHENA

9. 11 th Geant4 Space Users’ Workshop Hiroshima, 26-28 Aug 2015 AIM: Asteroid Impact Mission  Part of the Asteroid Impact & Deflection Assessment mission (AIDA).  Launch foreseen for 2020  Study the Didymos binary asteroid system  INTA has been selected fot a feasibility study – COPINS (CubeSat Opportunity Payloads)  Responsible for two CubeSATs Geant4 activities  TBD. Overall radiation level and shielding assessments ESA AIM / COPINS

10. 11 th Geant4 Space Users’ Workshop Hiroshima, 26-28 Aug 2015 INTA Nanosat-1B Geant4 model of NS1B (80-85% mass, 100’s vols, high fidelity) Location of LDT and RadFET Nanosat 1B mission  Second sattelite of the nanosat series  Launched in summer 2009, sun-synchronous, 600 km  Radiation payloads  LDT (results to be published)  A photodiode-based TNID sensor (Dark current)  Particle flux measurements (Photocurrent)  High sensitivity RadFET TID sensors  Direct readout data ~150 rad/year  Compensated with annealing ~200 rad/year  Geant4 + NS1B Model ~240 ± 20 rad/year Geant4 activities  Space engineering.  Shielding analysis  Radiation levels at EEE, OWLS, LDT and RadFETs  Simulation of LDT calibration tests under proton (PSI)

11. 11 th Geant4 Space Users’ Workshop Hiroshima, 26-28 Aug 2015 LDT Developed by INTA Optoelectronics Lab Simulation of LDT calibration campaigns Geant4 model, 70 MeV proton irradiation and energy thresholds for <DT detectors. INTA Nanosat-1B Measurement results vs. Simulation under publication and PhD thesis

12. 11 th Geant4 Space Users’ Workshop Hiroshima, 26-28 Aug 2015 OPTOS, XatCobeo, HumSAT-D OPTOS  3U CubeSAT – Technological demonstrator  Launched on November 2013  Radiation payloads: High sensitivity RadFET sensor XatCobeo mission  3U CubeSAT – University of Vigo & INTA  Launched on Feb 2012 (VEGA maiden flight)  Radiation payloads: High sensitivity TNID sensor HumSAT-D mission  Evolution of XatCobeo. Same 1U platform  Launched on November 2013  Radiation payloads: High sensitivity TNID sensor  S/C full Geant4 modeling for shielding analysis & radiation levels estimation  Validation of environment models, margins analysis  Results under final publication process! Geant4 activity

13. 11 th Geant4 Space Users’ Workshop Hiroshima, 26-28 Aug 2015 R&D: CIRSOS Collaborative Iterative Radiation Shielding Optimisation System (CIRSOS) The CIRSOS system is an ESA funded R&D project aimed to develop a full radiation simulation framework, in order to help S/C and P/L engineers, through a SW system that:  Efficiently supports collaborative and iterative radiation analyses  Provides interfaces with industrial radiation design tools  Allows end-to-end radiation simulation, starting from the definition of the high energy particle environment, performing particle propagation through complex 3D geometrical models (via Geant4) and ending with deep dielectric charging effects modelling (via SPIS) Some of the most relevant advantages of CIRSOS for the radiation community include:  A user-friendly GUI to manage the entire system  A database controlled geometry managing. Material properties built-in databases  High-energy radiation and charging simulation capabilities (independent or coupled)  Parametric Geant4 analyses  Interface to SPENVIS, OMERE, FASTRAD and ESABASE2  Parallel simulation on multiple host / multiple processor  Built-in post-processing tools, bilt-in geometry visualization tools See Friday talk !!

14. 11 th Geant4 Space Users’ Workshop Hiroshima, 26-28 Aug 2015 Summary  INTA is applying Geant4 as standard radiation tool  Many different programs supported  Establishing G4 as the standard methodology for radiation analysis  Main scenarios of successful application  Engineering support to ESA instruments  Engineering support to INTA missions  Payload design and calibration of radiation sensors  Other Geant4 R&D focused on the improvement and/or development of new engineering tools Summary  INTA is applying Geant4 as standard radiation tool  Many different programs supported  Establishing G4 as the standard methodology for radiation analysis  Main scenarios of successful application  Engineering support to ESA instruments  Engineering support to INTA missions  Payload design and calibration of radiation sensors  Other Geant4 R&D focused on the improvement and/or development of new engineering tools Summary & Future