M. Wells N. P. Bannister

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The design, development and calibration of an impact force transducer or penetrometer, for use on the Huygens spacecraft scheduled to land on the surface of Saturn's moon Titan, is described, The thumb-sized transducer employs a piezoelectric sensing element and is capable of working at cryogenic temperatures. Use of the sensor on a spacecraft imposes(More)
A new 250 kV high voltage platform has been installed at the ORNL Multicharged Ion Research Facility (MIRF) to extend the energy range of multicharged ions available for experimental investigations of their collisional interactions with electrons, atoms, molecules, and solid surfaces. A new all-permanent magnet Electron Cyclotron Resonance (ECR) ion source,(More)
Optical time series photometry of the short period magnetic white dwarf + probable brown dwarf binary SDSS J121209.31 + 013627.7 reveals pulse-like variability in all bands from i to u, peaking at u. These modulations are most likely due to a self-eclipsing accretion hot spot on the white dwarf, rotating into view every 88.43 minutes. This period is(More)
A control system for the 250-kV platform and beamlines for accelerating and transporting ions produced by an all-permanent-magnet ECR ion source has been developed at the ORNL Multicharged Ion Research Facility. This system utilizes the Experimental Physics and Industrial Control System (EPICS) software to manipulate a programmable logic controller (PLC)(More)
Optical time series photometry of the short period magnetic white dwarf + probable brown dwarf binary SDSS J121209.31 + 013627.7 reveals pulse-like variability in all bands from i to u, increasing towards bluer wavelengths and peaking at u. These modulations are most likely due to a self-eclipsing accretion hot spot on the white dwarf, rotating into view(More)
Optical time series photometry of the short period magnetic white dwarf + probable brown dwarf binary SDSS J121209.31 + 013627.7 reveals pulse-like variability in all bands from i to u, increasing towards bluer wavelengths and peaking at u. These modulations are most likely due to a self-eclipsing accretion hot spot on the white dwarf, rotating into view(More)
Following CT scanning, the resultant images were processed using AMIRA, then converted into finite element models using two different procedures. The first was using CATIA to further process and smooth the volume, followed by paver meshing in ANSYS Workbench, resulting in an irregular mesh which conformed to all tow boundaries within the fabric. The second(More)
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