A multi-channels poloidal interferometer/polarimeter is under development for the Divertor Tokamak Test (DTT) facility, a new tokamak device whose construction is starting in Italy. The aim of the diagnostics is the simultaneous measurement of the line integrated electron density, Faraday rotation and Cotton Mouton effect. The measurement of two polarimetric signals together with the interferometric one would allow for a robust electron density estimate, for the internal magnetic field measurement as well as for the magnetic equilibrium reconstruction. In this work, we present the advances in the diagnostics design whose characteristics are constrained by scientific requirements as well as the DTT structural aspects. In this regards, we have analyzed the possibility of accommodating up to 16 lines of sight in the available space and the contribution of different chords positions in the magnetic equilibrium reconstruction. In particular, we have used the VMEC and V3FIT codes to evaluate the expected interferometric/polarimetric signals and their contribution in the reconstruction of the q profile. These results have been used to optimize the chords positions. Eventually, we present a realistic CAD-driven design of the diagnostic, with details of the most critical components (e.g. the corner cube retroreflectors in the high field side), which would allow for the selected chords configurations implementation.

Fiorucci, D., Fassina, A., Filippi, F., Mazzotta, C., Rocchi, G., Rossi, R., et al. (2022). Advances in the DTT poloidal interferometer/polarimeter design. JOURNAL OF INSTRUMENTATION, 17(2) [10.1088/1748-0221/17/02/c02023].

Advances in the DTT poloidal interferometer/polarimeter design

R. Rossi;P. Gaudio;M. Gelfusa;
2022-01-01

Abstract

A multi-channels poloidal interferometer/polarimeter is under development for the Divertor Tokamak Test (DTT) facility, a new tokamak device whose construction is starting in Italy. The aim of the diagnostics is the simultaneous measurement of the line integrated electron density, Faraday rotation and Cotton Mouton effect. The measurement of two polarimetric signals together with the interferometric one would allow for a robust electron density estimate, for the internal magnetic field measurement as well as for the magnetic equilibrium reconstruction. In this work, we present the advances in the diagnostics design whose characteristics are constrained by scientific requirements as well as the DTT structural aspects. In this regards, we have analyzed the possibility of accommodating up to 16 lines of sight in the available space and the contribution of different chords positions in the magnetic equilibrium reconstruction. In particular, we have used the VMEC and V3FIT codes to evaluate the expected interferometric/polarimetric signals and their contribution in the reconstruction of the q profile. These results have been used to optimize the chords positions. Eventually, we present a realistic CAD-driven design of the diagnostic, with details of the most critical components (e.g. the corner cube retroreflectors in the high field side), which would allow for the selected chords configurations implementation.
2022
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/01 - FISICA SPERIMENTALE
English
Interaction of radiation with matter
Plasma diagnostics-interferometry
spectroscopy and imaging
Fiorucci, D., Fassina, A., Filippi, F., Mazzotta, C., Rocchi, G., Rossi, R., et al. (2022). Advances in the DTT poloidal interferometer/polarimeter design. JOURNAL OF INSTRUMENTATION, 17(2) [10.1088/1748-0221/17/02/c02023].
Fiorucci, D; Fassina, A; Filippi, F; Mazzotta, C; Rocchi, G; Rossi, R; Terranova, D; Tudisco, O; Andreoli, P; Cipriani, M; Consoli, F; Gaudio, P; Gelfusa, M; Giudicotti, L; Innocente, P; Belpane, A; Mauro, G; Mascali, D; Naselli, E; Orsitto, Fp; Torrisi, G
Articolo su rivista
File in questo prodotto:
File Dimensione Formato  
Filippi_2022_J._Inst._17_C08023.pdf

solo utenti autorizzati

Tipologia: Versione Editoriale (PDF)
Licenza: Copyright dell'editore
Dimensione 462.12 kB
Formato Adobe PDF
462.12 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/314317
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 1
  • ???jsp.display-item.citation.isi??? 1
social impact