Thermal Impact of Cosmic Ray Interaction with an X-Ray Microcalorimeter Array

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dc.contributor.authorMiniussi, Antoine R.
dc.contributor.authorAdams, Joseph S.
dc.contributor.authorBandler, Simon R.
dc.contributor.authorBeaumont, Sophie
dc.contributor.authorChang, Meng P.
dc.contributor.authorChervenak, James A.
dc.contributor.authorFinkbeiner, Fred M.
dc.contributor.authorHa, Jong Y.
dc.contributor.authorHummatov, Ruslan
dc.contributor.authorKelley, Richard L.
dc.contributor.authorKilbourne, Caroline A.
dc.contributor.authorPorter, Frederick S.
dc.contributor.authorSadleir, John E.
dc.contributor.authorSakai, Kazuhiro
dc.contributor.authorSmith, Stephen J.
dc.contributor.authorWakeham, Nicholas A.
dc.contributor.authorWassell, Edward J.
dc.date.accessioned2020-03-25T15:52:59Z
dc.date.available2020-03-25T15:52:59Z
dc.date.issued2020-02-13
dc.description.abstractThe X-ray Integral Field Unit (X-IFU) instrument on the Athena mission will be positioned at the Lagrangian point L2 and be subject to cosmic rays generated by astrophysics sources, primarily relativistic protons. Previous simulations have shown that particles of energy higher than 150 MeV will make it through the outer layers of the satellite. They will reach the detector wafer with a rate of 3 cts cm⁻² s⁻¹ and a most probable energy deposited in the Si frame supporting the array at 150 keV. These events can affect the energy resolution of the detectors through the thermal fluctuations that they produce. This study assesses this potential problem and discusses two suggested design approaches to decrease the impact of cosmic ray in order to limit their effect to their allocation of 0.2 eV within the Athena/X-IFU energy-resolution budget. The first is the addition of a coating layer of high heat capacity material (e.g., Pd) and the second is the splitting of this coating into two thermal regions near the TES array to keep the heat away from the array. Implementing these two features is predicted to cause a decrease in the number of events above 1 µK by more than a factor 10 to ~ 1.5 cps when compared to an equivalent design without these features.en_US
dc.description.urihttps://link.springer.com/article/10.1007/s10909-020-02337-1en_US
dc.format.extent11 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/m2hfev-0jhj
dc.identifier.citationMiniussi, Antoine R.; Adams, Joseph S.; Bandler, Simon R.; Beaumont, Sophie; Chang, Meng P.; Chervenak, James A.; Finkbeiner, Fred M.; Ha, Jong Y.; Hummatov, Ruslan; Kelley, Richard L.; Kilbourne, Caroline A.; Porter, Frederick S.; Sadleir, John E.; Sakai, Kazuhiro; Smith, Stephen J.; Wakeham, Nicholas A.; Wassell, Edward J.; Thermal Impact of Cosmic Ray Interaction with an X-Ray Microcalorimeter Array; Journal of Low Temperature Physics (2020); https://link.springer.com/article/10.1007/s10909-020-02337-1;en_US
dc.identifier.urihttps://doi.org/10.1007/s10909-020-02337-1
dc.identifier.urihttp://hdl.handle.net/11603/17638
dc.language.isoen_USen_US
dc.publisherSpringer Nature Switzerland AG.en_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Center for Space Sciences and Technology
dc.relation.ispartofUMBC Faculty Collection
dc.rightsThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.
dc.rightsPublic Domain Mark 1.0*
dc.rightsThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law
dc.rights.urihttp://creativecommons.org/publicdomain/mark/1.0/*
dc.titleThermal Impact of Cosmic Ray Interaction with an X-Ray Microcalorimeter Arrayen_US
dc.typeTexten_US

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