Experimental Astronomy

, Volume 37, Issue 3, pp 525–538 | Cite as

Calibration measurements on the DEPFET Detectors for the MIXS instrument on BepiColombo

  • P. Majewski
  • F. Aschauer
  • S. Aschauer
  • A. Bähr
  • B. Bergbauer
  • M. Hilchenbach
  • M. Krumrey
  • C. Laubis
  • T. Lauf
  • P. Lechner
  • G. Lutz
  • F. Scholze
  • H. Soltau
  • A. Stefanescu
  • L. Strüder
  • J. Treis
Article

Abstract

The Mercury Imaging X-ray Spectrometer (MIXS) will be launched on board of the 5th ESA cornerstone mission BepiColombo. The two channel instrument MIXS is dedicated to the exploration of the elemental composition of the mercurian surface by imaging x-ray spectroscopy of the elemental fluorescence lines. One of the main scientific goals of MIXS is to provide spatially resolved elemental abundance maps of key rock-forming elements. MIXS will be the successor of the XRS instrument, which is currently orbiting Mercury on board of NASAs satellite MESSENGER. MIXS will provide unprecedented spectral and spatial resolution due to its innovative detector and optics concepts. The MIXS target energy band ranges from 0.5 to 7 keV and allows to directly access the Fe-L line at 0.7 keV, which was not accessible to previous missions. In addition, the high spectroscopic resolution of FWHM ≤ 200 eV at the reference energy of 1 keV after one year in Mercury orbit, allows to separate the x-ray fluorescence emission lines of important elements like Mg (1.25 keV) and Al (1.49 keV) without the need for any filter. The detectors for the energy and spatially resolved detection of x-rays for both channels are identical DEPFET (DEpleted P-channel FET) active pixel detectors. We report on the calibration of the MIXS flight and flight spare detector modules at the PTB (Physikalisch-Technische Bundesanstalt) beamlines at the BESSY II synchrotron radiation facility. Each detector was calibrated at least at 10 discrete energies in the energy range from 0.5 to 10 keV. The excellent spectroscopic performance of all three detector modules was verified.

Keywords

Mercury BepiColombo MIXS DEPFET detector Calibration X-ray spectroscopy 

Notes

Acknowledgments

MIXS is being developed by a consortium of Institutes and companies in the UK (University of Leicester, The Open University, RAL, Magna Parva), Finland (University of Helsinki, FMI, Patria, SSF, Oxford Instruments, Beneq), Spain (INTA, CAB, Lidax, Crisa), Germany (MPS, MPE, PNSensor) and France (PHOTONIS).

References

  1. 1.
    Benkhoff, J. et al.: BepiColombo - comprehensive exploration of Mercury: mission overview and science goals. Planet. Space Sci. 58, 2–20 (2010)ADSCrossRefGoogle Scholar
  2. 2.
    Fraser, G. et al.: The Mercury imaging X-ray spectrometer (MIXS) on BepiColombo. Planet. Space Sci. 58, 79–95 (2010)ADSCrossRefGoogle Scholar
  3. 3.
    Schlemm, C. et al.: The X-ray spectrometer on the MESSENGER Spacecraft. Space Sci. Rev. 131, 393–415 (2007)ADSCrossRefGoogle Scholar
  4. 4.
    Majewski, P. et al.: DEPFET macropixel detectors for MIXS: integration and qualification of the flight detectors. IEEE Trans. Nucl. Sci. 59, 2479–2486 (2012)ADSCrossRefGoogle Scholar
  5. 5.
    Beckhoff, B. et al.: A quater-century of metrology using synchrotron radiation by PTB in Berlin. Phys. Status Solidi B 246, 1415–1434 (2009)ADSCrossRefGoogle Scholar
  6. 6.
    Treis, J. et al.: MIXS on BepiColombo and its DEPFET based focal plane instrumentation. Nucl. Instr. and Meth. A 624, 540–547 (2010)ADSCrossRefGoogle Scholar
  7. 7.
    Porro, M. et al.: ASTEROID: a 64 channel ASIC for source follower readout of DEPFET arrays for X-ray astronomy. Nucl. Instr. and Meth. A 617, 351–357 (2010)ADSCrossRefGoogle Scholar
  8. 8.
    Treis, J. et al.: DEPFET based focal plane detectors for MIXS on BepiColombo, Proc. SPIE, Vol. 7742, p. 77420S (2010)Google Scholar
  9. 9.
    Aschauer, S. et al.: to be publishedGoogle Scholar
  10. 10.
    Kemmer, J., Lutz, G.: New detector concepts. Nucl. Instr. and Meth. A 253, 365–377 (1987)ADSCrossRefGoogle Scholar
  11. 11.
    Treis, J. et al.: DEPMOSFET active pixel sensor prototypes for the XEUS wide field imager. IEEE Trans. Nucl. Sci. 52, 1083–1091 (2005)ADSCrossRefGoogle Scholar
  12. 12.
    Treis, J. et al.: Pixel detectors for X-ray imaging spectroscopy in space. JINST 4, P03012 (2009)ADSCrossRefGoogle Scholar
  13. 13.
    Stefanescu, A. et al.: The wide field imager of the international X-ray observatory. Nucl. Instr. and Meth. A 624, 533–539 (2010)ADSCrossRefGoogle Scholar
  14. 14.
    Lutz, G.: DEPFET development at the MPI semiconductor laboratory. Nucl. Instr. and Meth. A 549, 103–111 (2005)ADSCrossRefGoogle Scholar
  15. 15.
    San Juan, J.L. et al.: MIXS focal plane assembly, Proc. SPIE, Vol. 7011, p. 70112S (2008)Google Scholar
  16. 16.
    San Juan, J.L. et al.: BepiColombo MIXS Focal Plane Assembly, International Conference on Space Optics (ICSO) 2012, paper 168 (2012)Google Scholar
  17. 17.
    Lauf, T. et al.: Performance and spectroscopic behavior of DEPFET macropixels, 2009 IEEE Nuclear Science Symposium Conference Record, paper N24-5, pp 1202–1207 (2010)Google Scholar
  18. 18.
    Scholze, F. et al.: High-accuracy EUV metrology of PTB using synchrotron radiation, metrology, inspection and process control for microlithography XV. SPIE Proc. 4344, 402–413 (2001)CrossRefGoogle Scholar
  19. 19.
    Krumrey, M., Ulm, G.: High-accuracy detector calibration at the PTB four-crystal monochromator beamline. Nucl. Instr. and Meth. A 467–468, 1175–1178 (2001)CrossRefGoogle Scholar
  20. 20.
    Krumrey, M. et al.: Calibration and characterization of semiconductor X-ray detectors with synchrotron radiation. Nucl. Instr. and Meth. A 568, 364–368 (2006)ADSCrossRefGoogle Scholar
  21. 21.
    Scholze, F., Procop, M.: Modelling the response function of energy dispersive X-ray spectrometers with silicon detectors. X-ray Spectrom. 38, 312–321 (2009)CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  • P. Majewski
    • 1
  • F. Aschauer
    • 2
    • 3
  • S. Aschauer
    • 1
  • A. Bähr
    • 2
    • 3
  • B. Bergbauer
    • 2
    • 3
  • M. Hilchenbach
    • 4
  • M. Krumrey
    • 5
  • C. Laubis
    • 5
  • T. Lauf
    • 2
    • 3
  • P. Lechner
    • 1
  • G. Lutz
    • 1
  • F. Scholze
    • 5
  • H. Soltau
    • 1
  • A. Stefanescu
    • 2
    • 3
  • L. Strüder
    • 1
  • J. Treis
    • 1
  1. 1.PNSensor GmbHMunichGermany
  2. 2.Max-Planck-HalbleiterlaborMünchenGermany
  3. 3.Max-Planck-Institut für extraterrestrische PhysikGiessenbachstrGarchingGermany
  4. 4.Max-Planck-Institut für SonnensystemforschungGöttingenGermany
  5. 5.Physikalisch-Technische Bundesanstalt (PTB)BerlinGermany

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