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Articles 1 - 8 of 8
Full-Text Articles in Physical Sciences and Mathematics
Synergistic Models Of Electron Emission And Transport Measurements Of Disordered Sio2, Jr Dennison, Jodie Corbridge Gillespie, Allen Andersen, Amberly Evans Jensen, Gregory Wilson, Justin Dekany, Alec M. Sim, Ryan Hoffmann
Synergistic Models Of Electron Emission And Transport Measurements Of Disordered Sio2, Jr Dennison, Jodie Corbridge Gillespie, Allen Andersen, Amberly Evans Jensen, Gregory Wilson, Justin Dekany, Alec M. Sim, Ryan Hoffmann
Jodie Corbridge Gillespie
A critical component in the prediction and mitigation of spacecraft charging issues is an accurate model of the charging, transport and electron emission properties of a broad array of materials used in the construction of spacecraft. The increased sensitivity, longer-duration missions, and ventures into more demanding environments only serve to heighten this need. One important way for the spacecraft charging community to address this issue is to expand the role of more fundamental materials physics. This includes the development of unifying theoretical models of the charge transport equations based on the creation, distribution, and occupancy of defect densities of states. …
Measurement Of The Temperature Dependence Of Radiation Induced Conductivity In Polymeric Dielectrics, Jodie Corbridge Gillespie
Measurement Of The Temperature Dependence Of Radiation Induced Conductivity In Polymeric Dielectrics, Jodie Corbridge Gillespie
Jodie Corbridge Gillespie
This study measures Radiation Induced Conductivity (RIC) in five insulating polymeric materials over temperatures ranging from ~110 K to ~350 K: polyimide (PI or Kapton HNTM and Kapton ETM), polytetraflouroethylene (PTFE or TeflonTM), ethylene-tetraflouroethylene (ETFE or TefzelTM), and Low Density Polyethylene (LDPE). RIC occurs when incident ionizing radiation deposits energy and excites electrons into the conduction band of insulators. Conductivity was measured when a voltage was applied across vacuum-baked, thin film polymer samples in a parallel plate geometry. RIC was calculated as the difference in sample conductivity under no incident radiation and under an incident ~4 MeV electron beam at …
Evolution Of Thermally Annealed Graphitic Amorphous Carbon Towards Graphene: Structure, Vibrational Dynamics, Electron Emission And Band Gap, Jr Dennison, Jodie C. Gillespie, Sterling Smith
Evolution Of Thermally Annealed Graphitic Amorphous Carbon Towards Graphene: Structure, Vibrational Dynamics, Electron Emission And Band Gap, Jr Dennison, Jodie C. Gillespie, Sterling Smith
Jodie Corbridge Gillespie
No abstract provided.
Density Of State Models And Temperature Dependence Of Radiation Induced Conductivity, Jodie C. Gillespie, Jr Dennison, Alec Sim
Density Of State Models And Temperature Dependence Of Radiation Induced Conductivity, Jodie C. Gillespie, Jr Dennison, Alec Sim
Jodie Corbridge Gillespie
No abstract provided.
Extensions Of The Walden-Wintle Model Of Charge Transport In Disordered Materials For Charge Injection With Electron Beams, Jr Dennison, Greg Wilson, Alec Sim, Jodie C. Gillespie
Extensions Of The Walden-Wintle Model Of Charge Transport In Disordered Materials For Charge Injection With Electron Beams, Jr Dennison, Greg Wilson, Alec Sim, Jodie C. Gillespie
Jodie Corbridge Gillespie
No abstract provided.
Secondary Electron Emission Of Annealed Graphitic Amorphous Carbon: The Role Of Evolving Bandgap, Jodie Corbridge, Jr Dennison, Neal Nickles
Secondary Electron Emission Of Annealed Graphitic Amorphous Carbon: The Role Of Evolving Bandgap, Jodie Corbridge, Jr Dennison, Neal Nickles
Jodie Corbridge Gillespie
No abstract provided.
Charge Transport And Electron Emission Of Disordered Materials: Extensions Of The Walden-Wintle Model For Charge Injection With Electron Beams, Jr Dennison, Alec Sim, Gregory Wilson, Jodie C. Gillespie
Charge Transport And Electron Emission Of Disordered Materials: Extensions Of The Walden-Wintle Model For Charge Injection With Electron Beams, Jr Dennison, Alec Sim, Gregory Wilson, Jodie C. Gillespie
Jodie Corbridge Gillespie
No abstract provided.
Effects Of Bandgap On Secondary Electron Emission For Graphitic Carbon Semiconductiors, Jodie Gillespie, Jr Dennison
Effects Of Bandgap On Secondary Electron Emission For Graphitic Carbon Semiconductiors, Jodie Gillespie, Jr Dennison
Jodie Corbridge Gillespie
Preliminary data indicates a relationship between bandgap width and magnitude of secondary electron (SE) yield. Our work extends this research to investigate the correlation of small bandgap width to SE yield. These trends are compared with current semiempirical models of two limiting cases, conductors and large bandgap semiconductors. Specifically, five graphitic amorphous carbon (g-C) samples of decreasing bandgap width were produced by vacuum annealing from 0C-1050C. Preliminary data shows a 30of g-C above nanocrystalline graphite. Measurements include SE yields, backscattered yields and electron emission spectra, as well as characterization with SEM, photoyields, AES, resistivity, and Raman spectroscopy. SE yields were …