A novel method for trace tritium transport studies

• Published in: Nuclear fusion Vol. 49; no. 8; pp. 085025 - 085025 (11)
• Main Authors: Bonheure, Georges, Mlynar, Jan, Murari, A, Giroud, C, Belo, P, Bertalot, L, Popovichev, S
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.08.2009; Institute of Physics
• Subjects: Exact sciences and technology; Magnetic confinement and equilibrium; Physics; Physics of gases, plasmas and electric discharges; Physics of plasmas and electric discharges; Plasma properties; Tokamaks; Transport properties; Magnetic flux; ITER tokamak; Particle confinement; Tritium; Experimental study; Convection; Diffusivity; JET tokamak; Emissivity; Magnetic confinement; Magnetic surfaces; Transport coefficient; Plasma transport processes; Confined plasma; Particle transport
• ISSN: 0029-5515; 1741-4326
• DOI: 10.1088/0029-5515/49/8/085025

A new method combining a free-form solution for the neutron emissivity and the ratio method (Bonheure et al 2006 Nucl. Fusion 46 725-40) is applied to the investigation of tritium particle transport in JET plasmas. The 2D neutron emissivity is calculated using the minimum Fisher regularization method (MFR) (Anton et al 1996 Plasma Phys. Control. Fusion 38 1849, Mlynar et al 2003 Plasma Phys. Control. Fusion 45 169). This method is being developed and studied alongside other methods at JET. The 2D neutron emissivity was significantly improved compared with the first MFR results by constraining the emissivity along the magnetic flux surfaces. 1D profiles suitable for transport analysis are then obtained by subsequent poloidal integration.