자료유형  

 학위논문

Control Number  

0017165143

International Standard Book Number  

9798346873792

Dewey Decimal Classification Number  

530

Main Entry-Personal Name  

Pierren, Christopher M. B.

Publication, Distribution, etc. (Imprint  

[S.l.] : The University of Wisconsin - Madison., 2024

Publication, Distribution, etc. (Imprint  

Ann Arbor : ProQuest Dissertations & Theses, 2024

Physical Description  

241 p.

General Note  

Source: Dissertations Abstracts International, Volume: 86-06, Section: B.

General Note  

Advisor: Diem, Stephanie J.

Dissertation Note  

Thesis (Ph.D.)--The University of Wisconsin - Madison, 2024.

Summary, Etc.  

요약Future nuclear fusion energy systems based on the spherical tokamak magnetic confinement concept would greatly benefit from solenoid-free startup. Viable solenoid-free startup targets must have readily conservable poloidal flux, low impurities, kinetic profiles that are compatible with the sustainment technique, and attractive MHD properties. A promising solenoid-free startup technique is local helicity injection (LHI), which was further refined on the Pegasus spherical tokamak. This work utilized the coupling and sustainment of LHI initiated plasmas with Ohmic current drive to assess startup plasma viability. Assessment included characterizing how the LHI plasmas evolve across the handoff to Ohmic current drive and comparisons with OH-only plasmas. LHI plasmas were found to readily meet the conditions for viability, producing plasmas with readily conservable flux, sufficiently low impurities, and attractive MHD properties. Furthermore, it was found that LHI plasmas appear compatible with auxiliary heating input power, as simultaneous LHI and OH current drive was able to mitigate losses of kinetic energy suffered at the time of handoff when the techniques were applied alone. These results bode well for the technique's continued development.

Subject Added Entry-Topical Term  

Plasma physics.

Subject Added Entry-Topical Term  

Electromagnetics.

Subject Added Entry-Topical Term  

Applied physics.

Subject Added Entry-Topical Term  

Nuclear physics.

Index Term-Uncontrolled  

Fusion

Index Term-Uncontrolled  

Helicity

Index Term-Uncontrolled  

Local helicity injection

Index Term-Uncontrolled  

Plasma

Index Term-Uncontrolled  

Tokamak

Added Entry-Corporate Name  

The University of Wisconsin - Madison Nuclear Engineering & Engineering Physics

Host Item Entry  

Dissertations Abstracts International. 86-06B.

Electronic Location and Access  

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Control Number  

joongbu:655419