Position-dependent microchannel plate gain correction in Rosetta's ROSINA/DFMS mass spectrometer

Autor: Martin Rubin, Jean-Jacques Berthelier, Frederik Dhooghe, Andrew Gibbons, Hans Balsiger, Kathrin Altwegg, J. De Keyser, Stephen A. Fuselier, Tamas I. Gombosi, Eddy Neefs
Přispěvatelé: Belgian Institute for Space Aeronomy / Institut d'Aéronomie Spatiale de Belgique (BIRA-IASB), Centre for Mathematical Plasma-Astrophysics [Leuven] (CmPA), Catholic University of Leuven - Katholieke Universiteit Leuven (KU Leuven), Physikalisches Institut [Bern], Universität Bern [Bern], Service de Chimie Quantique et Photophysique, Université libre de Bruxelles (ULB), PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS), Southwest Research Institute [San Antonio] (SwRI), UTSA Department of Physics and Astronomy [San Antonio], The University of Texas at San Antonio (UTSA), Department of Atmospheric, Oceanic, and Space Sciences [Ann Arbor] (AOSS), University of Michigan [Ann Arbor], University of Michigan System-University of Michigan System, ANR, CNES, ANR-11-IDEX-0001,Amidex,INITIATIVE D'EXCELLENCE AIX MARSEILLE UNIVERSITE(2011)
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Technology
Physique de l'état condense [struct. électronique
etc.]
Comet atmosphere
Comet
Gain correction
Electron
Physics
Atomic
Molecular & Chemical
Physique de l'état condense [struct. propr. thermiques
etc.]
010402 general chemistry
Mass spectrometry
01 natural sciences
Secondary electrons
Ion
Physico-chimie générale
Optics
Rosetta
Spectroscopie [état condense]
Physical and Theoretical Chemistry
ION
Instrumentation
DETECTOR
Physique de l'état condense [supraconducteur]
Spectroscopy
Instrumentation et méthodes en physique
Science & Technology
Spacecraft
business.industry
Chemistry
Physics
520 Astronomy
010401 analytical chemistry
Detector
Chimie théorique
Microchannel plate
Condensed Matter Physics
620 Engineering
0104 chemical sciences
Spectroscopie [électromagnétisme
optique
acoustique]
[SDU]Sciences of the Universe [physics]
Physical Sciences
ARRAY
COMA
Microchannel plate detector
business
Secondary electron yield
Zdroj: International journal of mass spectrometry, 446
De Keyser, J.; Altwegg, Kathrin; Gibbons, A.; Dhooghe, F.; Balsiger, Hans; Berthelier, J.-J.; Fuselier, S.A.; Gombosi, T.I.; Neefs, E.; Rubin, Martin (2019). Position-dependent microchannel plate gain correction in Rosetta's ROSINA/DFMS mass spectrometer. International journal of mass spectrometry, 446, p. 116232. Elsevier 10.1016/j.ijms.2019.116232
International Journal of Mass Spectrometry
International Journal of Mass Spectrometry, Elsevier, 2019, 446 (December 2019), pp.art. 116232. ⟨10.1016/j.ijms.2019.116232⟩
ISSN: 1387-3806
DOI: 10.1016/j.ijms.2019.116232
Popis: Mass spectrometers that rely on microchannel plate (MCP) detectors age when they are used intensively. The ageing process is due to a reduction of the MCP gain as ions repeatedly bombard the MCP, leading to a reduction of the secondary electron yield of an impacting ion and to a reduction of the electron amplification within the MCP pores. MCP gain therefore is both time- and position-dependent. This is particularly true for the Double Focusing Mass Spectrometer DFMS, part of the ROSINA instrument, embarked on the European Space Agency's Rosetta spacecraft that studied comet 67P/Churyumov-Gerasimenko continuously for over more than 2 years. A position-dependent gain correction technique is developed here. A detailed assessment of the technique demonstrates that improper treatment of this position-dependent gain can lead to misleading results and false conclusions, especially regarding less abundant species whose mass peak signature overlaps with peaks of abundant species. The correction technique presented here avoids such problems, especially in the situation where detector ageing is significant and uneven across the detector. It is also able to explain why all recorded mass peaks have a nearly symmetric double Gaussian shape, despite the strong variations in the position-dependent gain.
SCOPUS: ar.j
info:eu-repo/semantics/published
Databáze: OpenAIRE
Externí odkaz: