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Diagnostics of the ITER neutral beam test facility.

R Pasqualotto¹, G Serianni, P Sonato

¹Consorzio RFX, Associazione EURATOM-ENEA sulla Fusione, Corso Stati Uniti 4, I-35127 Padova, Italy. roberto.pasqualotto@igi.cnr.it

The Review of Scientific Instruments

|March 3, 2012

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The SPIDER and MITICA prototypes will test and optimize the ITER heating neutral beam (HNB) injector. Advanced diagnostics will monitor negative ion production and beam characteristics for ITER readiness.

Area of Science:

Plasma Physics
Fusion Energy Engineering

Background:

The International Thermonuclear Experimental Reactor (ITER) requires a high-performance heating neutral beam (HNB) injector.
Negative ion acceleration to 1 MV is crucial for efficient plasma heating in fusion devices.

Purpose of the Study:

To present the design of diagnostic systems for the SPIDER source and MITICA full injector prototypes.
To detail the methods for testing and optimizing the ITER HNB injector using these prototypes.
To ensure the ITER HNB injector meets performance requirements through advanced diagnostics.

Main Methods:

Utilizing SPIDER and MITICA prototypes to simulate ITER HNB injector conditions.
Employing advanced diagnostics including thermocouples, electrostatic probes, optical emission spectroscopy, cavity ring down, and laser absorption spectroscopy for RF source monitoring.

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Analyzing beam characteristics using cooling water calorimetry, instrumented calorimeters, beam emission spectroscopy, visible tomography, and neutron imaging.

Main Results:

The study presents the design of novel diagnostic systems tailored for HNB injector optimization.
These diagnostics enable detailed monitoring of negative ion production and beam properties.
The integrated diagnostic suite is crucial for ITER HNB injector development and validation.

Conclusions:

The developed diagnostic systems are essential for the successful testing and optimization of the ITER HNB injector prototypes.
This work provides a foundation for ensuring the reliability and performance of the ITER heating neutral beam.
The advanced diagnostics will facilitate the optimization of negative ion production and beam acceleration processes.