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Simulation of Radiative Transfer Within X-ray Microcalorimeter Absorbers.

M Lorenz1, C Kirsch1, P Peille2

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|November 28, 2022
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Summary
This summary is machine-generated.

We simulated radiative transfer in X-ray microcalorimeter absorbers using a simplified Monte Carlo model. This approach enables efficient analysis of energy loss effects on spectral response for instruments like Athena

Keywords:
MicrocalorimetersSimulationsTransition-edge sensors

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Area of Science:

  • Astrophysics
  • Instrumentation
  • Computational Physics

Background:

  • X-ray microcalorimeters are crucial for high-resolution spectroscopy.
  • Accurate modeling of photon interactions within absorbers is essential for understanding spectral response.
  • Existing particle transport frameworks can be computationally intensive.

Purpose of the Study:

  • To develop a computationally efficient Monte Carlo model for radiative transfer in X-ray microcalorimeter absorbers.
  • To investigate the impact of energy loss effects (Compton scattering, fluorescence, electron escape) on spectral response.
  • To create a tool for quick assessments and integration into larger simulation frameworks.

Main Methods:

  • Developed a numerical model for photon propagation and absorption in absorber structures.
  • Incorporated physical processes: Compton scattering, fluorescence, Auger and photoelectrons.
  • Implemented a simplified description of physics for reduced computational cost.

Main Results:

  • The model provides representative results for radiative transfer and energy deposition.
  • Demonstrated the capability to assess energy loss effects on spectral response.
  • Validated the model's applicability for parametric studies and instrument simulators.

Conclusions:

  • The simplified Monte Carlo model offers an efficient method for simulating X-ray microcalorimeter absorbers.
  • This approach is suitable for rapid analysis and integration into complex simulation tools.
  • The model is applied to study the spectral response of the Athena X-IFU instrument.