Paper 13093-288
Paper 13093-288
Development of the microcalorimeter array for the Line Emission Mapper (LEM) x-ray probe
On demand | Presenting live 19 June 2024 
Abstract
The Line Emission Mapper (LEM) is a proposed NASA probe-class mission designed to study the formation of structure in the Universe. LEM will have a 14k pixel array of transition-edge sensor (TES) microcalorimeters that provide a spectral resolution of < 2.5 eV and a bandpass of 0.2-2 keV. In this paper, we report on the status and plan for continued development of the LMS microcalorimeter. This includes details of the TES and x-ray absorber design, and the measured performance in prototype arrays. We present a detailed budget for the energy resolution and show how the properties of the LEM pixels are well optimized for the baseline time-division-multiplexing (TDM) that will be used read out the array. Finally, we describe the design and performance of the first full scale LMS arrays which include the necessary mechanical and electrical interfaces needed for LEM and are a precursor to an engineering model detector.
Presenter
NASA Goddard Space Flight Ctr. (United States)
Stephen J. Smith is a research astrophysicist at NASA Goddard Space Flight Center. He received his MPhys degree in physics with space science and technology in 2002 and his PhD in physics in 2006, both from the University of Leicester, United Kingdom. He is an co-author of ∼150 published papers. His primary research interests are in the development of cryogenic detectors and systems for x-ray astronomy applications.
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