A Coaxial Helicity Injection System for Nonsolenoidal Startup Studies on the Pegasus-III Experiment

• Main Authors: Bongard, M.W (Author), Diem, S.J (Author), Fonck, R.J (Author), Lewicki, B.T (Author), Palmer, A.C (Author), Raman, R. (Author), Reusch, J.A (Author), Sontag, A.C (Author), Weberski, J.D (Author), Winz, G.R (Author)
• Format: Article
• Language: English
• Published: Institute of Electrical and Electronics Engineers Inc. 2022
• Subjects: Coaxial helicity injection systems; Coaxial helicity injections; 'current; Electrodes; Flux footprint; Fusion reactors; Impurities; Magnetic separation; Magnetoplasma; PEGASIS; Pegasus; plasmas; Plasmas; Shape; Solenoids; Tokamak devices; tokamaks.; Tokamaks.; Toroidal magnetic fields; Vacuum vessel
• Online Access: View Fulltext in Publisher
• ISBN: 00933813 (ISSN)
• DOI: 10.1109/TPS.2022.3171510

Initiating current without using magnetic induction from a central solenoid is a critical scientific and technical challenge facing the spherical tokamak (ST). One such technique that has shown promise on several devices is coaxial helicity injection (CHI). In CHI, a dc voltage applied to large area coaxial electrodes injects current and helicity into the vacuum vessel for plasma startup and plasma current ( <formula> <tex>