Characterization of reticulated vitreous carbon foam using a frisch-grid parallel-plate ionization chamber
| Autor: | Philip B. Ugorowski, Nathaniel S. Edwards, Jerrod C. Conley, Douglas S. McGregor, Michael A. Reichenberger, Kyle A. Nelson, Christopher N. Tiner, Niklas J. Hinson, Ryan G. Fronk |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Physics
Nuclear and High Energy Physics 010308 nuclear & particles physics Carbon nanofoam chemistry.chemical_element 02 engineering and technology Electron 021001 nanoscience & nanotechnology 01 natural sciences Cathode law.invention Anode chemistry law 0103 physical sciences Electrode Ionization chamber Composite material 0210 nano-technology Instrumentation Carbon Voltage |
| Zdroj: | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 892:93-97 |
| ISSN: | 0168-9002 |
| DOI: | 10.1016/j.nima.2018.03.005 |
| Popis: | The propagation of electrons through several linear pore densities of reticulated vitreous carbon (RVC) foam was studied using a Frisch-grid parallel-plate ionization chamber pressurized to 1 psig of P-10 proportional gas. The operating voltages of the electrodes contained within the Frisch-grid parallel-plate ionization chamber were defined by measuring counting curves using a collimated 241Am alpha-particle source with and without a Frisch grid. RVC foam samples with linear pore densities of 5, 10, 20, 30, 45, 80, and 100 pores per linear inch were separately positioned between the cathode and anode. Pulse-height spectra and count rates from a collimated 241Am alpha-particle source positioned between the cathode and each RVC foam sample were measured and compared to a measurement without an RVC foam sample. The Frisch grid was positioned in between the RVC foam sample and the anode. The measured pulse-height spectra were indiscernible from background and resulted in negligible net count rates for all RVC foam samples. The Frisch grid parallel-plate ionization chamber measurement results indicate that electrons do not traverse the bulk of RVC foam and consequently do not produce a pulse. |
| Databáze: | OpenAIRE |
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