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Dr Alexandru Boboc (UKAEA)20/10/2026, 09:00DIAGNOSTICS FOR FUSION MACHINESOral
Following more than five decades of development, nuclear fusion has reached a point where it transits from pure physics experiments towards fusion power plant demonstrators (FPPs) using an engineering approach and preparing for commercial deployment. However, operating a commercial facility requires a radical departure from historical approaches. In this new paradigm, diagnostic and...
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Geert Verdoolaege (Ghent University)20/10/2026, 09:20DIAGNOSTICS FOR FUSION MACHINESOral
Data integration involves the combination of data from multiple, possibly heterogeneous diagnostics, to enhance accuracy, resolution and robustness of inferred system conditions. When focusing on real-time aspects, the approach is sometimes referred to as โsensor fusionโ, with common applications in domains like aerospace or autonomous driving. In the context of fusion devices, data...
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Filippo Bagnato (DTT S.c.a.r.l.)20/10/2026, 11:50DIAGNOSTICS FOR FUSION MACHINES DTT DiagnosticsOral
With the recent publication of the Divertor Tokamak Test (DTT) Research Plan [1], the DTT diagnostic set was updated to support the project objectives, closely following the evolution of the operational phases therein described. DTT is a fully superconducting, compact size (R = 2.19 m, a = 0.70 m) tokamak, currently under construction at the ENEA research center in Frascati, Italy. Thanks...
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Dr Donatella Fiorucci (ENEA Research Center Frascati)20/10/2026, 12:10DIAGNOSTICS FOR FUSION MACHINES DTT DiagnosticsOral
Interferometric and polarimetric diagnostics [1] are widely used in plasma experiments, particularly in magnetically confined fusion devices, to determine the electron density and to provide key information on internal magnetic fields, respectively. These measurements play a
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crucial role in the reconstruction of the plasma magnetic equilibrium and in the real-time estimation of the safety... -
Daniele Marocco20/10/2026, 12:30DIAGNOSTICS FOR FUSION MACHINES DTT DiagnosticsOral
The Divertor Tokamak Test (DTT) facility is equipped with a dedicated diagnostic suite to monitor neutron emission and runaway electron generation since the commissioning and early operational phases. The DD and DT neutron yield will be measured using fission chambers, BFโ detectors, scintillation detectors, and single-crystal diamond detectors. In addition, time-integrated measurements of the...
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George Vayakis (ITER Organization (IO))21/10/2026, 09:40MEASUREMENTS OF DENSITY AND TEMPERATURETutorial
This talk will outline the main techniques that provide density measurements in present magnetic fusion devices (interferometry, Thomson scattering, reflectometry and refractometry included) and provide application notes for their use where the plasma facing power density (particles, neutrons, photons) is very high and long life is needed.
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Bingzhe Zhao (University of Tennessee Knoxville)21/10/2026, 10:10MEASUREMENTS OF DENSITY AND TEMPERATUREOral
A divertor retarding field energy analyzer (RFEA), for time-resolved local ion temperature (Ti) measurements was tested in the lower divertor of the DIII-D tokamak using the Divertor Material Evaluation System (DiMES). Two more RFEAs embedded in the lower divertor tiles are also to be deployed during the upcoming Tungsten Tile Testing (T3) Campaign. DiMES tests have demonstrated high quality...
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83. Advances in Electron Density Calibration Techniques for the DIII-D Thomson Scattering DiagnosticFabio Conti (General Atomics)21/10/2026, 10:30MEASUREMENTS OF DENSITY AND TEMPERATUREOral
The absolute calibration of the Thomson scattering diagnostic for electron density measurements on the DIII-D tokamak has traditionally relied on Rayleigh scattering from neutral monatomic gases [1]. However, in regions with significant stray laser light, such as the divertor, Rayleigh scattering proves unreliable. To address this, a Raman scattering-based calibration method has been...
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Romain Demitra (INFN_-LNF)21/10/2026, 10:50MEASUREMENTS OF DENSITY AND TEMPERATUREShort Oral
Plasma-wakefield accelerators sustain GV/m-scale gradients, but shot-to-shot reproducibility remains the main obstacle to user-oriented operation. Diagnosing and controlling this instability requires measuring the plasma itself, not just the beam.
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At the SPARC_LAB plasma-based accelerator facility at INFN-LNF, Stark broadening spectroscopy of the Hฮฒ line provided shot-resolved plasma density... -
Luca Senni (CNR-IAC)21/10/2026, 11:00MEASUREMENTS OF DENSITY AND TEMPERATUREShort Oral
Electron temperature (Te) measurements in magnetized fusion plasmas rely heavily on Electron Cyclotron Emission (ECE) radiometry and High-Resolution Thomson Scattering (HRTS). While both diagnostics are routinely used to reconstruct Te profiles, significant discrepancies often emerge in specific operational regimes, particularly in high-performance plasmas approaching reactor-relevant...
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francesco paolo orsitto (create and enea)21/10/2026, 11:10MEASUREMENTS OF DENSITY AND TEMPERATUREShort Oral
Discrepancies between the Electron Cyclotron Emission (ECE) and Thomson Scattering measurements of electron temperature were observed on JET, TFTR and more recently on FTU and JET in high performance , high electron temperature ( Te>7KeV) plasmas in Deuterium-Tritium Campaigns. The physics basis of the differences of ECE and Thomson scattering measurements can be identified in the way the...
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Ran CHEN (Institute of plasma physics, Chinese Academy of Sciences)21/10/2026, 11:30DIAGNOSTICS FOR FUSION MACHINES EAST DiagnosticsOral
A Lithium Beam Emission Spectroscopy (Li-BES) has been successfully developed on EAST [S. Zoletnik et al 2018 Rev. Sci. Instrum. 89 063503], providing measurement of density fluctuation in the pedestal and SOL regions with high spatial and temporal resolutions. This diagnostic enabled us to conduct a series of important physics studies. A non-axisymmetry distribution of edge coherent mode...
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Rong Yan21/10/2026, 11:50DIAGNOSTICS FOR FUSION MACHINES EAST DiagnosticsShort Oral
Two sets of Low Energy Neutral Particle Analyzers (LENPAs) and Quartz Crystal Microbalances (QMBs) have been deployed on EAST to investigate the erosion and deposition processes of first wall materials (FWMs) within magnetic shadow areas (MSAs). These processes affect the lifetime of the first wall components and the fuel retention in the device, thereby posing a potential threat to the safe...
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SHOUXIN Wang (Institute Of Plasma Physics Chinese Academy Of Sciences)21/10/2026, 12:00DIAGNOSTICS FOR FUSION MACHINES EAST DiagnosticsShort Oral
The polarimeter/interferometer is a core diagnostic for measuring electron density and current density profiles in tokamak plasmas. This report presents recent progress of the POINT (POlarimeter-INTerferometer) system on the EAST tokamak, along with its application to the physical design for the future burning plasma device BEST.
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The EAST-POINT system employs the three-wave technique with a... -
Ting Lan (Institute of plasma physics, Chinese Academy of Sciences)21/10/2026, 12:10DIAGNOSTICS FOR FUSION MACHINES EAST DiagnosticsShort Oral
EAST tokamak, one of the most important Magnetic Confinement Fusion (MCF) devices in China, provides an important experimental platform for the study of steady-state advanced plasma operation. Over sixty diagnostic systems on EAST tokamak provides huge amounts of multimodal diagnostic data about MCF plasma. Diagnostic data of EAST tokamak has the characteristics of volume, variety and...
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Jibo Zhang21/10/2026, 12:20DIAGNOSTICS FOR FUSION MACHINES EAST DiagnosticsShort Oral
To meet the demand for a high-stability collinear orthogonally polarized light source in far-infrared polarimetric interferometers and Cotton-Mouton polarimeters for tokamak plasma diagnostics, a novel optically pumped twin far-infrared laser based on formic acid (HCOOH) gas is developed in this paper. The laser adopts an innovative integrated design of dual resonant cavities, where the two...
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yiqun LI21/10/2026, 12:30DIAGNOSTICS FOR FUSION MACHINES EAST DiagnosticsShort Oral
Accurate measurement of high electron temperature is of great importance for the study of high-performance plasmas on EAST and for future fusion devices. Thomson scattering (TS) and electron cyclotron emission (ECE) are two of the most widely used diagnostics for electron temperature measurement. Discrepancies between TS and ECE in the high-temperature regime have been reported and...
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Yan LI21/10/2026, 12:40DIAGNOSTICS FOR FUSION MACHINES EAST DiagnosticsShort Oral
A dual diagnostic system that combines traditional Thomson scattering (TS) system with Television Thomson Scattering (TVTS) system based on laser beam combining technique is developed and experimentally demonstrated on EAST. The vertical dual TS system constructed in this study primarily consists of five components: the laser light source system, optical transmission system, optical collection...
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่้น ้ฑ (ไธญๅฝ็งๅญฆ้ข็ญ็ฆปๅญไฝ็ฉ็็ ็ฉถๆ)21/10/2026, 12:50DIAGNOSTICS FOR FUSION MACHINES EAST DiagnosticsShort Oral
Magnetic diagnostics are essential for the measurement and control of plasma behavior in magnetic confinement fusion devices. However, conventional wound-coil magnetic probes face increasing challenges in future fusion reactors, including material degradation under strong nuclear radiation and high-energy neutron irradiation, as well as limited installation space caused by their relatively...
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wenxue fu (Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences)21/10/2026, 13:00DIAGNOSTICS FOR FUSION MACHINES EAST DiagnosticsShort Oral
Infrared thermography is routinely used for surface temperature measurement of plasma-facing components in tokamaks, but metallic divertor targets introduce uncertainties related to surface emissivity and optical transmission [1]. To improve the temperature measurement capability of the EAST lower divertor, a near-infrared/short-wavelength infrared two-color thermography system has been...
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yefan zhu21/10/2026, 13:10DIAGNOSTICS FOR FUSION MACHINES EAST DiagnosticsShort Oral
Visible optical diagnostics in tokamaks can be significantly affected by stray light, which is mainly generated by multiple reflections of plasma radiation from plasma-facing components. Because plasma-wall interactions continuously modify wall morphology and optical properties, models based on unexposed materials may fail during long-term operation. This study investigates the evolution of...
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