Dennison, JR

Duce, Jeff

Hodges, Joshua

English

DigitalCommons@USU

Utah State University DigitalCommons@USU Presentations Materials Physics Spring 5-2008 Launch and Deployment of the Misse-6 Payload: State of Utah Space Environment & Contamination Study Joshua Hodges Utah State University Jeff Duce Utah State University JR Dennison Utah State University Follow this and additional works at: https://digitalcommons.usu.edu/mp_presentations  Part of the Physics Commons Recommended Citation Hodges, Joshua; Duce, Jeff; and Dennison, JR, "Launch and Deployment of the Misse-6 Payload: State of Utah Space Environment & Contamination Study" (2008). 13th Rocky Mountain NASA Space Grant Consortium NASA Fellowship Symposium. Presentations. Paper 77. https://digitalcommons.usu.edu/mp_presentations/77 This Presentation is brought to you for free and open access by the Materials Physics at DigitalCommons@USU. It has been accepted for inclusion in Presentations by an authorized administrator of DigitalCommons@USU. For more information, please contact digitalcommons@usu.edu. Launch and Deployment of the Misse-6 Payload: State of Utah Space Environment & Contamination Study (SUSpECS)Joshua Hodgesa, JR Dennisona, Jeff Duceba Physics Department, Utah State Universityb Get Away Special/ Microgravity Research TeamEmail:  joshual.hodges@gmail.comRam Side(Left) Shuttle Endeavour (STS-123) launched at 2:14 am on March 11th 2008. Aboard were two passive experiment containers (PEC) containing three experiments from students at Utah State University. (Right) Shuttle Endeavour on  a pass by of the International Space Station (ISS) to check for damage to the shuttle that may have occurred during launch. With the shuttle bay open the PEC’s can be seen in the top left corner. Each PEC weighs ~78 lbs and is the size of a large suitcase. The PEC’s contain numerous experiments from a wide variety of contributors. Approximately 125 samples are mounted on three 5 cm by 15 cm panels on both the ram (75) and wake (50) sides of the ISS.  They have been carefully chosen to provide needed information for a broad cross section of prototypical materials used on the exteriors of spacecrafts. (See Below)The materials will be tested for electron-, ion-, and photon-induced electron emission yield curves and emission spectra.  Characterization measurements include electron microscopy, reflection spectroscopy, resistivity and Auger electron spectroscopy.  The SUSpECS sample holder on the wake side of the International Space Station will investigate the effects that spacecraft charging has on contamination of samples. Four sets of 4 samples (Ag, Al, graphitic carbon, and Kapton XC) are biased at +5 V, -5 V, and -18 V, in addition to the control set grounded to ISS. These samples will be examined to detemine the changes in contamination from the space environment that results from the sample charging. On the ram side of MISSE 6 Utah State has the Double Stack, a two tiered experiment with 75 samples being exposed to space atmosphere and 50 concealed samples experiencing the temperature cycles and pressures of space. The two tiered design allows for varying atomic oxygen (AO) and ultra violet radiation (UV) exposure. This large communication satellite incorporates materials which are contained in SUSpECS.Graphite CompositeAu/MylarKaptonBlack KaptonAquadagAlWhite PaintITORTVFR4CoverglassIntegration of SUSpECS in to MISSE-66.00”2.00”1.00”Ram Sample HolderSUSpECS Double Stack+5 VDC-5 VDC-15 VDCGrounded Guard PlateLaunch and Deployment ActivitiesWake SideSUSpECSObjectives• Basic research extends our understanding of the materials/space environment interactions.• Specific knowledge is gain for critical materials in several on-going projects of the team members.• Valuable collaborations between team members is fostered.• Analysis capabilities and flight experience are developed that will prove useful not only for follow-up funding for post-flight analysis of the SUSpECS sample set, but for other joint ventures involving reliability and aging of materials in the space environment.Wake Side SUSpECS 3Passive UV Exposure25 Grounded Samples10 Concealed samplesInteraction of atomic oxygen with organic materialsWake Sample HolderSUSpECS ElectricalThe Double Stack will also investigate oxidation by atomic oxygen and the effects that shadowing have on atomic oxygen exposure. (Below) Measuring the mass erosion rate of Kapton due to atomic oxygen radiation degradation has long been the standard in determining how much atomic oxygen a surface has been exposed to. (Above and Right) Double Stack Ag foils will be evaluated as an accurate AO fluence monitor sensor and calibrated against kapton sensors. This study will use high purity silver and measure the penetration depth of the oxide layers to determine the atomic oxygen exposure. This test will also study the effects caused by shadowing and the possibilities of ballistic scattering of atomic oxygen.SUSpECS I, II & III: Individual investigators prepared separate sample holders. Holders were integrated into Passive Experiment Containers (PECs). The PEC’s were mounted on ISS for 6-12 months stay by astronauts Bob Bhenkin on EVA 5 March 22nd 2008 with the help of a hammer.(Right) Modeling electronic fields and particle trajectories of the biased wake-side samples.  A side view shows  the equipotential lines on a single sample charged to +5 volts.  This charging attracts ions that can damage materials, and enhance contamination.      .     (Right) Studies at USU have shown that very thin layers of contamination—even a few monolayers—can potentially cause significant changes in electron emission properties that can dramatically affect the charging of satellites.  The graph shows the differential charging of clean Au and 2-3 monolayers carbon-contaminated Au surfaces on a hypothetical satellite in GEO orbit.Scientific Solutions Inc has technology that uses nematicliquid crystal as the tuning medium in Fabry-Perot interferometers. The Liquid Crystal Fabry-Perot (LCFP) has passed temperature and vibration testing but the final test will be to see if it can withstand the atmosphere of lower earth orbit (LEO). (Above) B.A. BANKS, S. K. RUTLEDGE, J. A. BRADY and J. E.MERROW, NASA/SDIO Space Environmental Effects onMaterials Workshop, Hampton, VA, June July 1988. NASAConference Publication 3035, Part 1, pp. 197-239.(Right) J. KULIG, MS thesis, Case Western Reserve University,Cleveland (1991).Mass loss of unprotected and P4 protected Kapton vs exposure to atomic oxygenRocky Mountain Space Grant Consortium Salt Lake CityMay 5, 2008

Launch and Deployment of the Misse-6 Payload: State of Utah Space Environment & Contamination Study

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Launch and Deployment of the Misse-6 Payload: State of Utah Space Environment & Contamination Study

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