Articolo in rivista, 2021, ENG, 10.1063/5.0043669

Design of JT-60SA core Thomson scattering diagnostic system

Tojo H.; Pasqualotto R.; Fassina A.; Giudicotti L.; Sasao H.; Homma H.; Oyama N.

National Institutes for Quantum and Radiological Science and Technology (QST), Naka, Japan; CNR ISTP, Istituto per la Scienza e Tecnologia dei Plasmi, Sede di Padova, Italy; Consorzio RFX (CNR, ENEA, INFN, Universitá Degli Studi di Padova, Acciaierie Venete SpA), Padua, Italy.

An incoherent Thomson scattering diagnostic will be installed in the JT-60SA tokamak to measure electron temperature and electron density profiles. The target radial spatial resolution is 25 mm with 46 spatial channels. The accuracy in electron temperature and density is a few percent at ne = 7.5 × 1019 m-3, which is the expected value in the plasma core. This paper presents the designs of collection optics, fibers with their alignment system, and polychromators. The collection optics overcomes unique issues for superconducting fusion devices, i.e., limited design space, high-temperature measurements, and harsh radiation condition. When in several years the more performing plasma will generate intense nuclear radiation, the lens materials of the optics can be replaced by radiation resistant glasses without major changes in the lens holder. It will prevent transmission degradation and keep stable measurement accuracy.

Review of scientific instruments 92 (4), pp. 043556-1–043556-6

Keywords

Incoherent scattering, Light scattering, Magnetoplasma, Superconducting devices, Temperature measurement

CNR authors

Fassina Alessandro, Pasqualotto Roberto

CNR institutes

ISTP – Istituto per la Scienza e Tecnologia dei Plasmi

ID: 447129

Year: 2021

Type: Articolo in rivista

Creation: 2021-03-09 14:13:43.000

Last update: 2022-12-15 11:26:44.000

External IDs

CNR OAI-PMH: oai:it.cnr:prodotti:447129

DOI: 10.1063/5.0043669

Scopus: 2-s2.0-85104891461

PubMed: 34243487

MedLine: 34243487

ISI Web of Science (WOS): 000721054800003