Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 8 of 8 for “"helium plasma"”.
-
Characterization of the dynamic formation of nano-tendril surface morphology on tungsten while exposed to helium plasma
… the nanometer scale when subjected to low energy helium ion bombardment. This is due in part to the ion bombardment causing tungsten atoms to move on the surface, but also because of helium implantation and bubble development in the near surface at a depth < 30 nm. At high enough surface …
-
Sputter deposition and plasma modification of tungsten alloys for nuclear fusion applications
… device to demonstrate net fusion power. Critical plasma-facing components in the reactor will be made of tungsten, but helium plasma irradiation is known to embrittle tungsten metal. A future reactor will therefore need an alternative material to extend the lifetime of the components. This thesis …
-
Sputter deposition and plasma modification of tungsten alloys for nuclear fusion applications
… device to demonstrate net fusion power. Critical plasma-facing components in the reactor will be made of tungsten, but helium plasma irradiation is known to embrittle tungsten metal. A future reactor will therefore need an alternative material to extend the lifetime of the components. This thesis …
-
Design and Characterization of a Coaxial Plasma Railgun for Jet Collision Experiments
Plasma railguns are electromagnetic accelerators used to produce controlled high velocity plasma jets. This thesis discusses the design and characterization of a small coaxial plasma railgun intended to accelerate argon-helium plasma jets. The railgun will be used for the study of plasma shocks in …
-
The Effect of Average Grain Size on Polycrystalline Diamond Films
… were measured using 21.2 eV photons from a helium plasma source. The films were characterized by x-ray photoelectron spectroscopy to determine elemental composition and the sp2/sp3 carbon fraction. The percentage of (111) diamond was determined by x-ray diffraction, and scanning electron …
-
Development and characterization of a low power helium microwave induced plasma for spectrometric determinations of metals and nonmetals
… dissertation centers on the development of a new helium microwave induced plasma. The analytical utility of this new plasma source is critically evaluated. To sustain the helium plasma a TM ₀₁₀ high efficiency microwave induced plasma, HEMIP, was used. The HEMIP is a modification of the original …
-
Plasma characterisation of an electron cyclotron resonance ion source by means of x-ray spectroscopy
… continuum emitted by the mirror confined plasma of an ECR ion source. The focus of our study was to investigate the influence of neutral pressure, incident microwave power and magnetic field configuration on spectral temperature and electron density of the warm electron population of the …
-
Development and Characterization of Conventional and Inverted Helicon Plasma Sources
Made available in DSpace on 2017-07-06T18:55:19Z (GMT). No. of bitstreams: 3 Masters_Benjamin_C_MS.pdf: 18600523 bytes, checksum: 3032067e89a45e39cfe4a8170385b677 (MD5) Masters_Benjamin_C_MS_ABS.pdf: 52155 bytes, checksum: 4de6d980b5c087fa233baf754ce1dc2b (MD5) license.txt: 4813 bytes, checksum: …