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 Astrophysics & Space Sciences: People
Ara  Chutjian's Picture
Address:
Jet Propulsion Laboratory
M/S 121-104
4800 Oak Grove Drive
Pasadena, CA 91109
Phone:
818.354.7012
Fax:
818.393.1899
Email Contact:

Ara Chutjian

Education
  • B.S. (Magna cum Laude) Brown University (1962)
  • Ph.D., University of California, Berkeley (1966)

Research Interests
  • Scattering of low-energy electrons (1-50 eV) from highly-charged ions (HCIs) by electron energy-loss and merged-beams methods
  • Measurement of metastable lifetimes in HCIs
  • Measurement of charge exchange and X-ray emission cross sections in HCIs
  • Generation and use of intense beams of fast neutral hydrogen and oxygen atoms for (a) atom-molecule gas-phase collisions, and (b) for atom-molecule surface recombination on interstellar grains
  • Detection of trace molecular species by ultralow energy electron capture (READ system)
  • Measurement of electron attachment cross sections at ultralow electron energies (0.2-150 meV) at 0.2 meV resolution
  • Miniaturization of mass spectrometer and gas chromatograph system for planetary missions
  • Flight and maintenance of the Trace Gas Analyzer, an astronaut safety tool for the International Space Station
  • Delivering the flight Vehicle Cabin Air Monitor, a miniature GC/MS system for trace species detection in long-duration human flight missions.

Professional Experience
  • Visiting Faculty Associate at Caltech (1998 - Present)
  • Jet Propulsion Laboratory (1969 - Present)
    • Leader, Atomic and Molecular Collisions Team (1990 - Present)
    • Senior Research Scientist (JPL) (1990)
    • Smithsonian Visiting Scientist, Harvard Ctr. for Astrophysics, Cambridge, MA (1984, 1987)
  • Postdoctoral Fellow, Univ. Southern California (1968)
  • Postdoctoral Fellow, Bell Telephone Laboratories (1967)

Selected Awards
  • NASA Exceptional Achievement Medal for the leading the successful development, launch and operation of the Vehicle Cabin Atmosphere Monitor (VCAM) on the International Space Station (2011)
  • NASA Group Achievement Award Vehicle Cabin Atmosphere Monitor (VCAM) Team (2011)
  • Victor Hambartsumyan Award (2010)
  • JPL Explorer Award (2009)
  • NASA Space Act Award for the READ trace species detection work, with a Certificate of Recognition and monetary award (2002)
  • NASA Award for Excellence to the AMC Team for design, construction, test, and delivery of the QMSA for integration as the Trace Gas Analyzer for astronaut use (2000)
  • JPL/Technology and Applications Programs Group Award for Exceptional Achievement (US Navy MUDSS undersea trace explosives detection program) (1998)
  • NASA Exceptional Scientific Achievement Medal (electron-ion collisions) (1997)
  • JPL/Technology and Applications Programs Award for Exceptional Achievement (fast atomic oxygen collisions) (1996)
  • Joint Appointment as Staff Scientist with JPL's Ctr. for Space Microelectronics Technol. (1996)
  • NATO award for research in electron-ion collisions with Queen's University (Belfast) (1987 - 1989)
  • Fellow, American Physical Society (1989)

Selected Publications
  1.  “Photon Emission Resulting from Collisions of O5+ with CO,” T. Ehrenreich, K. Miller, P. Gee, Q. Kessel, E. Pollack, W. W. Smith, N. Djurič, J. Lozano, S. J. Smith, and A. Chutjian, Nucl. Instr. Methods B 241, 125 (2005).
  2.  “Measurement of Metastable Lifetimes for Transitions in Fe9+, Fe10+, and Fe13+,” S. J. Smith, A. Chutjian, and J. A. Lozano, Phys. Rev. A 72, 062504 (2005).
  3.  “Measurements of Polyatomic Molecule Formation on an Icy Grain Analog Using Fast Atoms,” S. Madzunkov, B. J. Shortt, J. A. MacAskill, M. R. Darrach, and A. Chutjian, Phys. Rev. A 73, 020901(R) (2006).
  4.  “In-Situ Exploration of Venus on a Global Scale: Direct Measurements of Origins and Evolution, Meteorology, Dynamics, and Chemistry by a Long-Duration Aerial Science Station,” K. H. Baines, S. Atreya, R. W. Carlson, A. Chutjian, D. Crisp, J. L. Hall, D. L. Jones, V. V. Kerzhanovich, S. S. Limaye, and S. K. Stephens, International Probe Workshop IPPW-3 Proceedings, ESA Special Publication WPP263 (2006).
  5.  “Absolute Charge Exchange Cross Sections for Highly-Charged C, O, and Ne Ions on CO, H2O, and CO2,” R. J. Mawhorter, A. Chutjian, T. E. Cravens, N. Djurič, S. Hossain, C. M. Lisse, J. A. MacAskill, S. J. Smith, J. Simcic, and I. D. Williams, Phys. Rev. A 75, 032704 (2007).
  6.  “Laboratory Measurements of 50-300 eV X-Rays from Collisions of Cometary Interest: Ne and S L X-rays, Fe M X-rays, and Others,” C. J. Verzani, K. Miller, A. Wrigley, Q. Kessel, W. W. Smith, S. J. Smith, S. Hossain, and A. Chutjian, Nucl. Instr. Methods B 261, 189 (2007).
  7.  “Measurement and Calculation of Absolute Cross Sections for Excitation of the 3s23p 2Po1/2 - 3s23p 2Po3/2 Fine-Structure Transition in Fe13+,” S. Hossain, S. S. Tayal, S. J. Smith, J. C. Raymond, and A. Chutjian, Phys. Rev. A 75, 022709 (2007).
  8.  “Digitally Synthesized High Purity, High Voltage Radiofrequency Drive Electronics for Mass Spectrometry,” R. T. Schaefer, J. A. MacAskill, M. Mojarradi, A. Chutjian, M. R. Darrach, S. Madzunkov, and B. J. Shortt, Rev. Sci. Instr. 79, 095107 (2008).
  9.  “Results from the Vehicle Cabin Atmosphere Monitor:  A Miniature Gas Chromatograph/Mass Spectrometer for Trace Contamination Monitoring on the ISS and Orion,” A. Chutjian, M. R. Darrach, B. J. Bornstein, A. P. Croonquist, E. Edgu-Fry, D. J. Fry, V. Garkanian, M. A. Girard, V. R. Haemmerle, W. M. Heinrichs, R. D. Kidd, S. Lee, J. A. MacAskill, S. M. Madzunkov, L. Mandrake, T. M. Rust, R. T. Schaefer, J. L. Thomas, N. Toomarian, M. J. Walch, M. Christensen, D. Demonbrun, R. Vanholden, P. M. Holland, and B. J. Shortt, SAE Technical Paper Series (refereed paper 08ICES-0321, available at http://www.sae.org).
  10.  “Formation of Formaldehyde and Carbon Dioxide on an Icy Grain Analogue Using Fast Hydrogen Atoms,” S. M. Madzunkov, J. A. MacAskill, A. Chutjian, P. Ehrenfreund, M. R. Darrach, G. Vidali, and B. J. Shortt, Ap. J. 697, 801 (2009).
  11.  “Formation of Carbon Dioxide, Methanol, Ethanol, and Formic Acid on an Icy Grain Analog Using Fast Oxygen Atoms,” S. M. Madzunkov, J. A. MacAskill, and A. Chutjian, Ap. J. 712, 194 (2010).
  12.  “Measurement and Calculation of Absolute Single and Multiple Charge Exchange Cross Sections for Feq+ Ions on CO and CO2,” J. Simcic, D. R. Schultz, R. J. Mawhorter, A. Chutjian, I. Čadež, J. B. Greenwood, C. M. Lisse, and S. J. Smith, Phys. Rev. A 81, 062715 (2010).
  13.  “Validation Test Results from the Vehicle Cabin Atmosphere Monitor,” M. R. Darrach, A. Chutjian, B. J. Bornstein, A. P. Croonquist, V. Garkanian, V. R. Haemmerle, W. M. Heinrichs, D. Karmon, J. Kenny, R. D. Kidd, S. Lee, J. A. MacAskill, S. M. Madzunkov, L. Mandrake, T. M. Rust, R. T. Schaefer, J. L. Thomas, and N. Toomarian, SAE Technical Paper Series (refereed paper AIAA 2010-6094, available at http://www.sae.org).
  14. “Measurement and Calculation of Absolute Single and Multiple Charge Exchange Cross Sections for Feq+ Ions Impacting H2O,” J. Simcic, D. R. Schultz, J. B. Greenwood, R. J. Mawhorter, B. V. McKoy, S. J. Smith, C.   Winstead, and A. Chutjian, Ap. J. 722, 435 (2010).
  15. “Dipole Excitation with a Paul Ion Trap Mass Spectrometer,” J. A. MacAskill, S. M. Madzunkov, A. Chutjian, Applications of Accelerators in Research and Industry, AIP Conf. Proceedings 1336, 127 (2011).
  16. “Measurement of Absolute Charge Exchange Cross Sections for He2+ with He and H2,” R. J. Mawhorter, J. B. Greenwood, A. Chutjian, T. Haley, C. D. Mitescu, and J. Simcic, Phys. Rev. A 84, 052714 (2011).
  17. “X-Ray Emissions from Collisions of O6+ Ions with CO,” K. A. Miller, W. W. Smith, T. Ehrenreich, Q. C. Kessel, E. Pollack, C. Verzani, V. A. Kharchenko, A. Chutjian, J. A. Lozano, N. Djuric, and S. J. Smith, Ap. J. 742, 130 (2011).
  18. “Collision Physics in the Atomic and Molecular Universe,” A. Chutjian, J. Simcic, S. M. Madzunkov, J. A. MacAskill, R. J. Mawhorter, and E. Tsikata, J. Physics: Conference Series 388, 012042 (2012).
  19. “Dissociative Electron Attachment to NO, CO and N2O in a 0.5 T Magnetic Field,” E. Tsikata, M. Darrach, S. Madzunkov, and A. Chutjian, J. Physics: Conference Series 388, 052014 (2012).
  20. “Trace Chemical and Major Constituents Measurements of the International Space Station Atmosphere by the Vehicle Cabin Atmosphere Monitor,” M. R. Darrach, A. Chutjian, B. J. Bornstein, A. P. Croonquist, V. Garkanian, J. Hofman, D. Karmon, J. Kenny, R. D. Kidd, S. Lee, J. A. MacAskill, S. M. Madzunkov, L. Mandrake, R. T. Schaefer, and N. Toomarian, SAE Technical Paper Series (refereed paper AIAA 2012-3432, available at http://www.sae.org).
  21. “Charge Exchange and Atom-Surface Collisions in Astrophysics,” A. Chutjian, J. A. MacAskill, S. M. Madzunkov, J. Simcic, and D. R. Schultz, Applications of Accelerators in Research and Industry, AIP Conf. Proceedings 1525, 43 (2013).
  22. “Size Distribution of Possible Dust Carriers for the Extended Red Emission,” D. P. Mahapatra, A. Chutjian, J. R. Machacek, and R. S. Mangina, Ap. J. 790, 140 (2014).
  23. “Measurement and Calculation of Absolute Single and Double Charge Exchange Cross Sections for O6+ Ions at 2.33 keV/u and 4.67 keV/u Impacting He and H2,” J. R. Machacek, D. P. Mahapatra, D. R. Schultz, Yu. Ralchenko, A. Chutjian, J. Simcic, and R. J. Mawhorter, Phys. Rev. A 90, 052708 (2014).
  24. “Solar-Wind Ion Driven X-Ray Emission from Cometary and Planetary Atmospheres: Measurements and Theoretical Predictions of Charge-Exchange Cross Sections and Emission Spectra for O6+ + H2O, CO, CO2, CH4, N2, NO, O2, and Ar,” J. R. Machacek, D. P. Mahapatra, D. R. Schultz, Yu. Ralchenko, A. Moradmand, M. O. A. El Ghazaly, and A. Chutjian, Ap. J. 809, 75 (2015).
  25. “Improved Water Analysis for Long-Duration Manned Space Exploration,” J. A. MacAskill and A. Chutjian, 45th International Conf. Environmental Systems ICES-2015-1630 (7/15, Belleville, WA).
  26. “Electrostatic Storage Ring for Physics and Space Studies,” A. Chutjian, M. O. A. El Ghazaly, D. P. Mahapatra, A. Moradmand, J. Phys. Conf. Series 635, 032099 (2015).
  27. “Measurements and Theoretical Predictions of Charge Exchange Cross Sections and Emission Spectra for O6+ with H2O, CO, CO2, CH4, N2, NO, N2O and Ar,” J. R. Machacek, D. P. Mahapatra, D. R. Schultz, Yu. Ralchenko, A. Moradmand, M. O. A. El Ghazaly, and A. Chutjian, Ap. J. 809, 75 (2015)
  28. “The Puzzling Detection of Plutonian X-Rays by Chandra,” C. M. Lisse, R. L. McNutt, Jr., S. J. Wolk, F. Bagenal, S. A. Stern, R. Gladstone, T. E. Cravens, M. E. Hill, P. Kollmann, D. F. Strobel, H. A. Elliott, D. J. McComas, R. Binzel, B. Snios, H. A. Weaver, A. Chutjian, L. A. Young, C. Olkin, and K. Ennico, Icarus 00, 0000 (2016) (in press).

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