First assessment of non-X-ray background in Line Emission Mapper (LEM) focal plane detector.

Date Issued
2023
Author(s)
Abstract
The LEM (Line Emission Mapper) mission proposal envisions a cryogenic microcalorimeter array optimized for the 0.2–2 keV energy band, based on the X-IFU heritage. The array will consist of 13,806 absorber pixels with a 290 µm pitch, in hexagonal arrangement, that for a 4 m focal length will cover a solid angle equal to 29.4 square degrees. The orbit for LEM is currently under study with the Sun-Earth Lagrange points L1 and L2 possible candidates. For what concerns the non X-Ray background (NXB), the premises are very similar to the X-IFU case. The background estimates are performed using Monte Carlo simulations with the Geant4 software [RD1] and, as a consequence, minor modifications to the X-IFU simulations can give precious insights on the NXB level to be expected for the instrument. Furthermore, it is possible to test the effect of changes to the instrument mass model (sensitivity analysis) and identify the configuration that optimizes the detector performances.
Volume
INAF_LEM_BKG_001
Uri
Rights
open.access
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NXB_assessment_LEM.pdf

Description
Technical Note
Size

3.13 MB

Format

Adobe PDF

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