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JOHN ROBERT DENNISON
Physics Department, UMC 4415 (435)797-2936
Utah State University [email protected]
Logan, UT 84322-4415 http://digitalcommons.usu.edu/mp//
EDUCATION:
Ph.D. in Physics. December, 1985; Virginia Tech, Blacksburg, VA. A.L. Ritter, Advisor.
Dissertation: (e,2e) Spectroscopic Investigations of the Spectral Momentum Densities of Thin Carbon Films
M.S. in Physics. 1983; Virginia Tech, Blacksburg, VA.
B.S. in Physics with Concentration in Math (Magna Cum Laude), 1979; Appalachian State University, Boone, NC.
PROFESSIONAL EXPERIENCE:
Diverse background in experimental solid state physics. Pursuing research at Utah State University (USU) focusing
on amorphous, polymeric, composite and carbon materials. Studying charging and discharging of materials physics
with particular application to space environment effects and spacecraft charging. Research in electron emission,
conductivity, electrostatic discharge and dielectric properties of highly insulating materials, including polymers,
glasses, and ceramics. Emphasis in electron scattering techniques including secondary and backscattered electron
energy- and angle-resolved spectroscopy, photoyield and ion yield electron emission spectroscopy, Auger electron
spectroscopy (AES), electron energy loss spectroscopy (EELS), (e,2e) spectroscopy, low-energy electron diffraction
(LEED), reflection high-energy electron diffraction (RHEED), electron stimulated desorption and adsorption, and
electron microscopy. Theoretical modeling of dynamical probes (Raman, IR, INS) of vibrations in continuous
random network amorphous materials. Research on structure, phase transitions, and dynamics of adsorbed layers
and physisorption using x-ray and neutron scattering and vapor pressure adsorption isotherms.
EMPLOYMENT EXPERIENCE: Professor, August 2000 to present. Physics Department, Utah State University; Logan, UT.
National Academies Senior Research Fellow, January 2012 to December 2012. Sabbatical research leave with the
Spacecraft Charging and Instrumentation Calibration Laboratory at the Phillips Laboratory of the Air Force
Research Laboratory Space Vehicles Directorate. Kirtland Air Force Base; Albuquerque, NM.
Associate Professor, August 1994 to August 2000. Physics Department, Utah State University; Logan, UT.
Assistant Professor. August 1988 to August 1994. Physics Department, Utah State University; Logan, UT.
Research Associate, September 1985 to August 1988. Dept. Physics & Astronomy, Univ. Missouri; Columbia, MO.
SELECTED HONORS: NASA Group Achievement Award by NASA Space Environment and Effects Branch (2003), NASA Software
Author Award by NASA Inventions and Contributions Board (2003), Nomination for NASA Award for Research
Excellence by NASA Space Environment and Effects Branch (1999).
College of Science Researcher of the Year 2015, 2012 Improving Undergraduate Physics Education Award from the
American Physical Society’s Committee on Education (2012)College of Science Undergraduate Research Mentor of
the Year (2009), Physics Nominee for College of Science Researcher of the Year (2006, 2007), USU Department
Teaching Excellence Award (2005); Physics Nominee for Graduate Research Mentor of the Year (2004, 2003),
Alumni Professorship Award (1999), College of Science Teacher of the Year (1999).
SELECTED RECENT GRANTS & AWARDS: Subcontract for NASA / SBIR Phase II Grant by Sienna Technologies, “Improved Ceramic Materials for Hall
Thruster Propulsion Devices,” JR Dennison, “Hall Thruster Secondary Electron Emission Tests,” (October,
2014 to December, 2015).
Small Business Technology Transfer Research (STTR), Air Force Research Laboratory, “Volume Charge
Distribution Measurement in Thin Dielectrics: Phase II,” Lee Pearson and JR Dennison (June 2013 to May
2015).
Subcontract for NSF / SBIR Phase I Grant by Sommer Materials Research, “Electrochromic Ceramic Materials for
Roof Tiles,” JR Dennison, “UV Materials Degradation Tests,” (4/2014-6/2014).
NASA Space Technology Research Fellowships (NSTRF), (8/2014-7/2018); (8/2012-7/2014); (9/2000-8/2003);
(7/1995-6/1998).
Subcontract for NASA James Webb Space Telescope Project by Goddard Space Flight Center, “Materials Testing of
highly insulating materials for the JWST—Phases I through VIII,” (3/2006-12/2013); .
Subcontract for NASA / SBIR Phase I Grant by Sienna Technologies, “Hall Thruster Secondary Electron Emission
Tests for Improved Ceramic Materials for Hall Thruster Propulsion Devices,” (9/2013-12/2013).
Small Business Technology Transfer Research (STTR), Air Force Research Laboratory, “Volume Charge
Distribution Measurement in Thin Dielectrics,” Phase I, (9/2013-12/2013); Phase II, (6/2013-5/2015).
USU Space Dynamics Laboratory Enabling Technologies Program Grant, “Intermediate-Scale Space Survivability
Test Facility: Expanded SDL Capabilities for Environment Effects Testing of Space Materials, Components,
Sensors and Cubesats,” (7/2013-12/2014).
Orbital Sciences Corporation, “Radiation Effects on Flight Materials,” (10/2011-2/2012).
Johns Hopkins University Applied Physics Laboratory, “Investigations of Space Environment Induced Materials
Modifications of SUSpECS Samples,” (9/2010-6/2011).
Ball Aerospace Technology Corporation, “OTE Mirror Resistivity Tests—JWST,” (6/2011-11/2011).
Subcontract for NASA / SBIR Phase II Grant by Ashwin-Ushas Corporation, “Spacecraft Charging and Electrostatic
Materials Testing for Ashwin Electrochomic Materials,” (9/2009-12/2009).
Boeing Corporation, “Testing of Highly Resistive Satellite Materials for Spacecraft Anomaly Determination,”
(3/2006-9/2006).
Subcontract for NASA Radiation Belt Space Probe Project by Johns Hopkins University Applied Physics Lab,
“Resistivity and Electron Emission Studies of Materials for the NASA Radiation Belt Storm Probes (RBSP)
Mission in Extreme Radiation Environments,” (9/2006-12/2007).
Subcontract for NASA Solar Probe Project by Johns Hopkins Univ. Appl. Physics Lab, “Electron Emission and
Resistivity of Materials for NASA Solar Probe Mission in Extreme Thermal Rad. Environ.,” (3/2006-9/ 2007).
Subcontract for NASA Grant by Jet Propulsion Laboratory, “Solar Sail Propulsion Testing,” “Electron Emission
Testing of Solar Sail Nanocomposite Materials,” (6/2005-1/2006).
USU Space Dynamics Laboratory Enabling Technologies Program Grant, “Development Support and Pre-Flight
Analysis for SUSpECS,” (USU and SDL, 7/2005-6/ 2006).
Subcontract for AFOSR / SBIR Phase I Grant by Applied Sciences, “Electron Emission Properties of Dielectric
Materials for Satellites Containing Carbon Nanofibers,” (1/2004-7/2004).
USU Space Dynamics Laboratory Enabling Technologies Grant, “Investigation of Contamination, Charge Storage,
and Charge-Enhanced Contamination of Spacecraft Optical Components,” (USU and SDL, 7/2003-6/2004).
NASA Space Environments and Effects Program Grant, “Materials Database of Electronic Properties with
Application to Spacecraft Charging@ (9/2001-8/200.).
NASA Space Environments and Effects Program Grant, “Measurement of Charge Storage Decay Time and
Resistivity of Spacecraft Insulators,” (USU and JPL, 4/2001-3/2003).
Boeing Corporation, “Electronic Properties of ISS Materials,” (9/2001-6/2003).
Department of Defense, "Ultra-high Vacuum Electron Scattering Chamber for the Characterization of Materials in
Severe Environments, Surfaces and Nanocrystalline Solids," (8/1995-7/1996).
SELECTED RECENT PUBLICATIONS: Allen Andersen and JR Dennison, “Pre-breakdown Arcing as a Proxy for DC Dielectric Breakdown Testing of
Polymeric Insulators,” submitted to Proceedings of the 2015 IEEE Conference on Electrical Insulation and
Dielectric Phenomena—(CEIDP 2015), 2015.
Allen Andersen and JR Dennison, “Mixed Weibull Distribution Model of DC Dielectric Breakdowns with Dual
Defect Modes,” submitted to Proceedings of the 2015 IEEE Conference on Electrical Insulation and Dielectric
Phenomena—(CEIDP 2015), 2015.
Jodie Corbridge Gillespie, JR Dennison and Alec M. Sim, “Density of State Models and Temperature Dependence
of Radiation Induced Conductivity,” submitted to IEEE Tran. Plasma Science, 2014, 8 pp.
Justin Dekany, Justin Christensen, JR Dennison, Amberly Evans Jensen, Gregory Wilson, Todd Schneider, Charles
W. Bowers and Robert Meloy, “Variations in Cathodoluminescent Intensity of Spacecraft Materials Exposed to
Energetic Electron Bombardment,” accepted for publication in IEEE Tran. Plasma Science, 2014, 7 pp.
Amberly Evans Jensen and JR Dennison, ”Defects Density of States Model of Cathodoluminescent Intensity and
Spectra of Disordered SiO2,” accepted for publication in IEEE Tran. Plasma Science, 2014, 7 pp.
JR Dennison, “The Dynamic Interplay Between Spacecraft Charging, Space Environment Interactions and Evolving
Materials,” IEEE Tran. Plasma Science, 2015, 8 pp, in press.
Allen Andersen, JR Dennison, Alec M. Sim and Charles Sim, “Electrostatic Discharge and Endurance Time
Measurements of Spacecraft Materials: A Defect-Driven Dynamic Model,” IEEE Tran. Plasma Science, 2015,
11 pp, in press. 10.1109/TPS.2015.2428258.
Kevin Guerch, Thierry Paulmier, JR Dennison, Justin Dekany, Sophie Guillemet-Fritsch, and Pascal Lenormand,
“Electrical Properties Study under Electron Beam of Annealed and Coated Boron Nitride,” Proceedings of the
13th
International Symposium on Materials in the Space Environment (ISMSE-13), (Pau, France, June 22-26),
2015.
JR Dennison, Kent Hartley, Lisa Montierth Phillipps, Justin Dekany, James S. Dyer, and Robert H. Johnson, “Small
Satellite Space Environments Effects Test Facility,” Proceedings of the 28th Annual AIAA/USU Conference on
Small Satellites, (Logan, UT, August 2-7, 2014).
D.C. Ferguson, J. Murray-Krezan, D.A. Barton JR Dennison, and S. Gregory, “Feasibility of Detecting Spacecraft
Charging and Arcing by Remote Sensing,” J. Spacecraft and Rockets, 2014, 7 pp, in press.
A. Andersen and JR Dennison, “Pre-breakdown Arcing and Electrostatic Discharge in Dielectrics under High DC
Electric Field Stress,” Conf. Electr. Insulat. Dielectric Phenom. (CEIDP) 2014 Annual Rept., IEEE-CEIDP, 4
pp..
J. Dekany, R.H. Johnson, G. Wilson, A.E. Jensen and JR Dennison, “Ultrahigh Vacuum Cryostat System for
Extended Low Temperature Space Environment Testing,” IEEE Trans. on Plasma Sci., 42(1), 266-271, 2014.
J.L. Hodges, A.M. Sim, J. Dekany, G. Wilson, A. Evans, and JR Dennison “In Situ Surface Voltage Measurements
of Layered Dielectrics,” IEEE Trans. on Plasma Sci., 42(1), 255-265, 2014.
A.E. Jensen, G. Wilson, J. Dekany, A.M. Sim and JR Dennison “Low Temperature Cathodoluminescence of Space
Observatory Materials,” IEEE Trans. on Plasma Sci., 42(1), 305-310, 2014. .
G. Wilson, JR Dennison, A.E. Jensen, and J. Dekany, “Electron Energy-Dependent Charging Effects of
Multilayered Dielectric Materials,” IEEE Trans. on Plasma Sci., 41(12), 3536-3544, 2013.
R.H. Johnson, L.D. Montierth, JR Dennison, James S. Dyer, and Ethan Lindstrom, “Small Scale Simulation
Chamber for Space Environment Survivability Testing,” IEEE Trans. on Plasma Sci., 41(12), 3453-3458, 2013.
J. Dekany, A.M. Sim, J. Brunson, and JR Dennison, “Electron Transport Models and Precision Measurements with
the Constant Voltage Conductivity Method,” IEEE Trans. on Plasma Sci., 41(12), 3565-3576, 2013.
JR Dennison, A. Evans, G. Wilson, J. Dekany, C.W. Bowers and R.t Meloy, “Electron Beam Induced Luminescence
of SiO2 Optical Coatings,” Conf. Electr. Insulat. Dielectric Phenom. (CEIDP) 2012 Annual Report, IEEE-
CEIDP.
A.E. Jensen, JR Dennison, G. Wilson, J. Dekany, C.W. Bowers, R. Meloy and J.B. Heaney, Properties of
Cathodoluminescence for Cryogenic Applications of SiO2-based Space Observatory Optics and Coatings,”
Proc. SPIE Cryogenic Optical Systems and Instruments Conf., Paper No. 8863-11, (San Diego, CA, 2013), 11
pp.
JR Dennison, A.E. Jensen, J. Dekany, G. Wilson, C.W. Bowers and R. Meloy, “Diverse Electron-induced Optical
Emissions from Space Observatory Materials at Low Temperatures,” Proc. SPIE Cryogenic Optical Systems
and Instruments Conf., Paper No. 8863-12, (San Diego, CA, 2013), 15 pp.
JR Dennison and Lee H. Pearson, “Pulse Electro-Acoustic (PEA) Measurements of Embedded Charge
Distributions,” Proc. SPIE Cryogenic Optical Systems and Instruments Conf., Paper No. 8876-35, (San Diego,
CA, 2013), 11 pp.
Amberly Evans Jensen, JR Dennison, Gregory Wilson, and Justin Dekany, “Nanodielectric Properties of High
Conductivity Carbon-Loaded Polyimide Under Electron-Beam Irradiation,” Proc. 2013 IEEE Intern. Conf.
Solid Dielectrics (ICSD), 2013, pp.730-735.
A.M. Sim and JR Dennison, “Comprehensive Theoretical Framework for Modeling Diverse Electron Transport
Experiments in Parallel Plate Geometries,” Paper Number, AIAA-2013-2827, 5th
AIAA Atmospheric and Space
Environments Conf., San Diego, CA, 2013, 31 pp.
JR Dennison, “The Dynamic Interplay Between Spacecraft Charging, Space Environment Interactions and Evolving
Materials,” Proc. 12th Spacecraft Charging Techn. Conf., (Kitakyushu, Japan, 2012).
JR Dennison, A. Evans, D. Fullmer, and J.L. Hodges, “Charge Enhanced Contamination and Environmental
Degradation of MISSE-6 SUSpECS Materials,” IEEE Trans. on Plasma Sci., 40(2), 254-261 (2012).
A. Evans and JR Dennison, “The Effects of Surface Modification on Spacecraft Charging Parameters,” IEEE Trans.
on Plasma Sci., 40(2), 291-297 (2012).
RC Hoffmann and JR Dennison, “Methods to Determine Total Electron-Induced Electron Yields Over Broad Range
of Conductive and Nonconductive Materials,” IEEE Trans. on Plasma Sci., 40(2), 298-304 (2012).
G. Wilson and JR Dennison, “Approximation of Range in Materials as a Function of Incident Electron Energy,”
IEEE Trans. on Plasma Sci., 40(2), 305-310 (2012).
M.M. Donegan, J.L. Sample, JR Dennison and R. Hoffmann, “Coating-Induced Charging of the Solar Probe
Spacecraft: A Materials and Modeling Study of Environmental Extremes,” J. Spacecraft and Rockets, 47(1),
134-146, (2010).
JR Dennison, J. Gillespie, J. Hodges, RC Hoffmann, J Abbott, A.W. Hunt and R. Spalding, “Radiation Induced
Conductivity of Highly-Insulating Spacecraft Materials,” in Application of Accelerators in Research and
Industry, Am. Inst. Physics Conf. Proc. Series, Vol. 1099, 2009), 203-208.
J.A. Roth, R. Hoffmann, JR Dennison, and J.R. Tippetts, “Effects of Radiation Induced Conductivity on
Electrostatic Discharge in Insulating Materials,” No.: AIAA-2009-3527, Proc. 1st AIAA Atmosph. Space
Environ. Conf., 2009.
JR Dennison, A. Sim, J. Brunson, S. Hart, J. Gillespie, J. Dekany, C. Sim and D. Arnfield, “Engineering Tool for
Temperature, Electric Field and Dose Rate Dependence of High Resistivity Spacecraft Materials Paper
Number,” AIAA-2009-0562, Proc. 47th
AIAA Meeting on Aerospace Sci., 2009.
R. Hoffmann, JR Dennison and J. Albretsen, “Flux and Fluence Dependence of Electron Emission for High-yield,
High-resistivity Materials: Implications for Spacecraft Charging,” Paper Number AIAA-2009-0348, Proc. 47th
AIAA Meeting on Aerospace Sci., 2009.
R. Hoffmann, J.L. Hodges, J. Hayes and JR Dennison, “Measurement of Charging and Discharging of High
Resistivity Materials Spacecraft Materials by Electron Beams,” Paper Number : AIAA-2009-0561, Proc. 47th
AIAA Meeting on Aerospace Sci., 2009.
JR Dennison and J. Brunson, “Temperature and Electric Field Dependence of Conduction in Low-Density
Polyethylene,” IEEE Trans. Plasma Sci., 36(5), 2008, 2246-2252.
R. Hoffmann, JR Dennison C.D. Thomson and J. Albresten, “Low-fluence Electron Yields of Highly Insulating
Materials” IEEE Trans. Plasma Sci.,36(5), 2008, 2238-2245.
N.W. Green and JR Dennison, “Deep Dielectric Charging of Spacecraft Polymers by Energetic Protons,” IEEE
Trans. Plasma Sci., 36(5), 2008, 2482-2490.
PUBLICATIONS, REPORTS, PRESENTATIONS AND ABSTRACTS: There have been more than 60 refereed journal publications; more than 100 conference proceeding; 15 major reports
for AFRL, NASA and aerospace company; and more than 350 oral and poster presentations in the field of space
environment effects by the Materials Physics Research Group over the last 23 years.
RESEARCH ASSOCIATES, RESEARCH SCIENTISTS AND STUDENTS DIRECTED: Graduate students mentored: MS-15, PhD-12
Undergraduate students mentored: 98
Sabbatical Colleagues Sponsored: 2
Research Scientists and Associates: 10
Recent Publications
The Space Environment Effects Materials
(SEEM) test facility operated by the Utah State
University Materials Physics Group (MPG) is a
leading research center for the study of space
environment effects on aerospace materials. The
MPG performs state-of-the-art ground-based
testing of electrical charging and electron
transport properties of both conducting and
insulating materials, emphasizing studies of
electron emission, conductivity, luminescence,
and electrostatic discharge. Our efforts in this
field over more than two decades—in cooperation
with NASA, AFOSR, and numerous aerospace
companies—have been primarily motivated by
the space community’s concern for charging of
crafts caused by plasma environment fluxes and
for radiation modification and damage of
materials and components. We have studied how
variations in temperature, accumulated charge,
exposure time, contamination, surface
modification, radiation dose rate and cumulative
dose affect these electrical properties—or related
changes in structural, mechanical, thermal and
optical properties—of materials and systems. Our
research also has direct application to high
voltage direct current (HVDC) power and
transmission lines, plasma deposition,
semiconductor metal-oxide interfaces, and
nanodielectrics.
Research Projects & Collaborations
Space Environment Effects
Materials Test Facility
For further information contact:
JR Dennison Professor of Physics Phone: (435)797-2936
Physics Department FAX: (435) 797-2492
4415 Old Main Hill E-mail: [email protected]
Utah State University URL: http://www.physics.usu.edu/
Logan, UT 84322-4415 USA
1. A Andersen, JR Dennison, AM Sim, C Sim, “Electrostatic Discharge and Endurance Time Measurements of Spacecraft Materials: A Defect-Driven Dynamic Model,” IEEE Tran. Plasma Science, 2015, 11 pp, in press.
2. RE Davies and JR Dennison, “Evolution of Secondary Electron Emission Characteristics of Spacecraft Surfaces, “J. Spacecraft and Rockets, 34, 571-574 (1997).
3. J Dekany, RH Johnson, G Wilson, AE Jensen, JR Dennison, “Ultrahigh Vacuum Cryostat System for Extended Low Temperature Space Environment Testing,” IEEE Trans. Plasma Sci., 42(1), 2014, 266-271.
4. J Dekany, AM Sim, J Brunson, JR Dennison, “Electron Transport Models and Precision Measurements with the Constant Voltage Conductivity Method,” IEEE Trans. Plasma Sci., 41(12), 2013, 3565-3576.
5. JR Dennison, “The Dynamic Interplay Between Spacecraft Charging, Space Environment Interactions and Evolving Materials,” IEEE Tran. Plasma Science, 2015, 8 pp, in press.
6. JR Dennison, A Evans, D Fullmer, JL Hodges, “Charge Enhanced Contamination and Environmental Degradation of MISSE-6 SUSpECS Materials,” IEEE Trans. Plasma Sci., 40(2), 254-261 (2012).
7. JR Dennison and LH Pearson, “Pulse Electro-Acoustic (PEA) Measurements of Embedded Charge Distributions,” Proc. SPIE Optics & Photonics Conf., 8876, 2013, 887612-1-11.
8. JR Dennison, AM Sim, J Brunson, S Hart, JC Gillespie, J Dekany, C Sim D Arnfield, “Engineering Tool for Temperature, Electric Field and Dose Rate Dependence of High Resistivity Spacecraft Materials,” AIAA-2009-0562, Proc. 47th AIAA Meeting on Aerospace Sciences, 2009.
9. JR Dennison, RC Hoffmann, J Abbott, “Triggering Threshold Spacecraft Charging with Changes in Electron Emission from Materials,” AIAA-2007-1098, Proc. 45th AIAA Meeting on Aerospace Sciences, 16 pp., Reno, NV, 2007.
10. AR Frederickson and JR Dennison, “Measurement of Conductivity and Charge Storage in Insulators Related to Spacecraft Charging,” IEEE Trans. Nuclear Sci., 50(6), 2003 2284-2291.
11. JL. Hodges, AM Sim, J Dekany, G Wilson, A Evans, JR Dennison “In Situ Surface Voltage Measurements of Layered Dielectrics,” IEEE Trans. Plasma Sci., 42(1), 2014, 255-265.
12. RC Hoffmann and JR Dennison, “Methods to Determine Total Electron-Induced Electron Yields Over Broad Range of Conductive & Nonconductive Materials,” IEEE Trans. Plasma Sci., 40, 2012, 298.
13. AE Jensen and JR Dennison, ”Defects Density of States Model of Cathodoluminescent Intensity and Spectra of Disordered SiO2,” IEEE Tran. Plasma Science, 2015, 7 pp., in press.
14. AE Jensen, G Wilson, J Dekany, AM Sim, JR Dennison “Low Temperature Cathodoluminescence of Space Observatory Materials,” IEEE Trans. Plasma Sci., 42(1), 2014, 305-310.
15. RH Johnson, LD Montierth, JR Dennison, JS Dyer, E Lindstrom, “Small Scale Simulation Chamber for Space Environment Survivability Testing,” IEEE Trans. Plasma Sci., 41(2013, 3453-3458.
16. AM Sim and JR Dennison, “Comprehensive Theoretical Framework for Modeling Diverse Electron Transport Experiments in Parallel Plate Geometries,” AIAA-2013-2827, 5th AIAA Atmosph. & Space Environ. Conf., San Diego, CA, 2013, 31 pp.
17. G Wilson, JR Dennison, AE Jensen, J Dekany, “Electron Energy-Dependent Charging Effects of Multilayered Dielectric Materials,” IEEE Trans. Plasma Sci., 41(12), 2013, 3536-3544.
18. G Wilson and JR Dennison, “Approximation of Range in Materials as a Function of Incident Electron Energy,” IEEE Trans. Plasma Sci., 40(2), 2012, 305-310.
Scan QR code to access MPG
papers and presentations at
http://digitalcommons.usu.edu/mp/
Materials Physics Group
Utah State University
Logan, UT USA
The MPG has been actively involved in more than 40
projects with external funding over the last two decades
related to space environment effects. Our
interdisciplinary research projects have involved
collaborations with numerous space agencies,
aerospace corporations and academic institutions,
including: • NASA Centers (GRC, GSFC, JPL, JSC, LaRC, MSFC),
• NASA Space Environments Effects Program,
• AFRL Spacecraft Charging & Instrument Calibration Lab,
• AFRL Space Weather Center of Excellence,
• Arnold AFB Engineer Development Center,
• European and Japanese Space Agency (ESA, ESTEC,
CNES, ONERA, LAPLACE, JAXA),
• DOE Idaho National Laboratory Center for Space Nuclear
Research,
• Johns Hopkins Applied Physics Laboratory,
• USU Space Dynamics Laboratory,
• Aerospace Corporation, ATK, Ball, Boeing, DPL Science,
Northrop Grumman, Orbital, SAIC, Vanguard Space
Technologies,
• SBIR projects (Ashwin, Advanced Scientific, Box Elder
Innovations, Sienna Technologies).
These ventures have studied both basic science and
specific effects and mitigation strategies in a wide
variety of extreme environments, each of which present
their own unique sets of issues and materials. These
environments have included: • Low Earth Orbit (Satellites, CubeSats, ISS, MISSE),
• Geosynchronous Earth Orbit (Communication Satellites,
CRRES/IDM, GOES, Landsat LCDM),
• Polar Orbit (Radiation Belt Space Probes, CubeSats),
• L1 and L2 (James Webb Space Telescope, DSCOVR),
• Near-solar (Solar Probe Mission, Solar Probe Plus),
• Lunar and Martian (Dust Mitigation),
• Jovian (Prometheus, JUNO, Solar Probe Mission, SIRSE,
Europa),
• Interplanetary (Solar Sails, Solar Probe Mission).
Utah State University Space Environments Effects Materials (SEEM) Test Facilities Electron Emission Conductivity & Charge Transport
Cathodoluminescence
Characterization & Preparation
Electrostatic Discharge & Arcing
Space Simulation
Collaborative Facilities The MPG collaborates with nearby facilities that
extend our capabilities. These include:
• USU Space Dynamics Laboratory for satellite
and sensor development, fabrication & missions.
• SDL Nano-Satellite Operation Verification and
Assessment (NOVA) test facility for
characterization and verification of subsystem and
system performance of small satellites.
• Idaho Accelerator Center for high energy
electron, proton and positron beams and radiation
sources.
• USU Nanoscale Device Lab for device and
sample fabrication and characterization.
• USU Core Microscopy Facility for high
resolution electron and optical microscopy.
• USU Luminescence Lab for optical and thermal
stimulated luminescence testing.
Extensive capabilities for sample preparation
and characterization. These include:
• Bulk Composition Inductively Coupled Plasma-
Atomic Emission Spectroscopy (ICP-AES), FTIR
and Raman spectroscopy.
• Surface Composition Auger Electron
Spectroscopy and AES mapping, Energy
Dispersive X-ray (EDX) spectroscopy. • Surface Morphology Scanning Electron
Microscopy (FE-SEM), Electron Backscatter
Diffraction (EBSD), Atomic Force (AFM) and
Scanning Tunneling (STM) Microcopies. • Vacuum Thermal Ovens Various ovens down to
<10-4 Pa and temperatures up to >1500 K. prolonged exposure to simulate critical
environmental components including:
• Neutral gas atmosphere/Vacuum <10-7 Pa.
• Temperatures from 60 K [3] to 450 K with < ±2 K.
• Electron fluxes with simultaneous low and high
energy electron guns from <20 eV to ~100 keV
with ~1 pA/cm2 to >1 μA/cm2) fluxes to simulate
the solar wind and plasma sheet at more than the
100X cumulative electron flux [9,11,12].
• Ionizing Radiation with a 100 mCi Sr90
broadband (~500 keV to 2.5 MeV) β radiation
source [15].
• NIR/VIS/UVA/UVB radiation (200 nm to 1700 nm)
at up to 4X sun equivalent intensity flux.
• Far UV simulation of H Lyman-α with Kr
resonance lamps at up to 4X sun intensity.
The Space Survivability
Test (SST) chamber [15]
has unique capabilities for
simulating and testing
potential environmental-
induced modifications of
small satellites, compo-
nents, and materials of up
to 350 cm2 area. It is
particularly well suited for
cost-effective tests of
multiple small scale
materials samples over
compared to 165 samples exposed to the ISS
space environment for 18 months in the USU
SUSpECS project on the MISSE-6 mission [6].
Studies underway
will determine how
well space degra-
dation of materials
can be simulated
in the SST.
Materials exposed
in the SST are
• Optical Characterization
Specular and Diffuse
Reflectivity/Transmission,
Thin-Film Interferometry, T-
dependent Emissivity.
• Luminescence Optically
Stimulated Luminescence
(OSL), Thermal Stimulated
Luminescence (TSL).
Electron emission
studies for incident
electrons, ions and
photons, with precision
absolute yields of
conductors, semicon-
ductors, insulators &
extreme insulators[12].
Measurements include:
• Total / Secondary / Backscattered Electron
Emission using <20 eV to 50 keV mono-
energetic pulsed beams with <5% absolute
uncertainty [2,12,17].
• Electron Emission Spectra versus energy (0-5
keV with ~0.1 eV resolution) and angle.[ 12]
• Ion-Induced Electron Emission spectra and
yields for various <300 eV to 5 keV mono-
energetic inert and reactive ions.
• Photon-Induced Electron Emission spectra and
yields for <0.6 eV to >6.5 eV (165-2000 nm)
monochromated photons. (10 eV near-H Lyman-α
source under development.)
• Surface Voltage simultaneous measurements of
0-10 kV with <0.2 eV resolution [11,17].
• Induced Electrostatic Breakdown simultaneous
current &NIR/VIS/UV optical measurements [18].
• Temperature capabilities from <60 K to >450 K
[3]. (Higher temperatures under development.)
Absolute intensity and
low level electron-
induced luminescence
spectra.
• Spectra (0.8-6.0 eV
or 200-1700 nm with
<0.1 nm resolution)
[13,14].
• Temperature capabilities from <60 K to >450 K [3,14].
• Charging and Saturation studies [13,14].
Conductivity and
charge transport
studies for conduct-
ors, semiconductors,
& extreme insulators.
Measurements
include:
• Bulk and surface
conductivity using
constant voltage
and charge storage
methods for
conductivities as
low as 10 -23 (Ω-
cm)-1 [4,8,10].
• Radiation Induced
Conductivity
(RIC), with temper-
ature and temporal
dependence [5,8].
• Phototyield IV
curves.
• Surface Voltage spatial and temporal
measurements over 0-10 kV with <0.2 eV
resolution [11,17].
• Temperature capabilities from <60 K to >450 K
[3]. (Higher temperatures under development.)
• Electrostatic Breakdown
Field Strength (<25 kV or
<109 V/m at 25 μm) [1,18].
• Temperature and Vacuum
capabilities from <120 K to
>350 K at <10-3 Pa [1].
• Electron-Induced Arcing
with current and spatially
and temporally resolved
optical measurements from
<6 K to >350 K at < <10-7
Pa [18].
