Abstract
The heating neutral beam (HNB) systems at ITER are designed to inject a total of 33 MW of either 1 MeV $\text{D}^{0}$ or 870 keV $\text{H}^{0}$ beams into the ITER plasma using two injectors with a possible addition of a third injector later to increase the injected power to $\sim 50$ MW. The injectors operate in a radioactive environment and should survive the life time of ITER, placing thereby stringent requirements on material and manufacturing choices. To ensure a smooth operational phase of neutral beams at ITER, a neutral beam test facility is under construction at Consorzio RFX, Padova, (hereinafter referred to as RFX), and consists of two test beds. The 100-kV SPIDER test bed will be used to optimize the source operation for H and D beams. The 1-MV MITICA test bed is essentially a full scale ITER prototype injector. The manufacturing and operational experiences at MITICA will not only establish the manufacturing processes of ITER HNB components but will also allow validation of the operational space of the injectors for ITER HNB. Operation of the two facilities is expected to begin in 2016 and 2019, respectively. Currently, the experiments on the ELISE facility, IPP Garching, with a half ITER sized RF beam source are underway. The ITER relevant parameters for the H beams have been achieved. Efforts are underway to optimize the same with D beams. The experimental database from ELISE will be an important input for establishing the SPIDER operation. This paper discusses the present status of the design and development of the injectors for ITER and the progress on the test facilities.
Highlights
O VER the years, a mixture of auxiliary heating systems has been used to overcome the limitations of ohmic heating of plasma caused by a decrease in resistivity with an increase in the electron temperature
Three of the systems use electromagnetic waves in three frequency ranges, viz., the electron cyclotron (EC), the ion cyclotron (IC), and the lower hybrid (LH) resonance frequency and the fourth uses multiampere high-energy neutral beams (NBs) [2]. These systems, either individually or in tandem, are designed to cover a range of operational requirements that include delivery of sufficient heating power to the core to access the H-mode confinement regime, and control of the plasma temperature with increasing density to bring the plasma to the desired operating point and to control any deviation around the operating point
This paper provides a brief overview of the requirements, development efforts, and the present status of the EC, IC, and NB systems planned for ITER
Summary
O VER the years, a mixture of auxiliary heating systems has been used to overcome the limitations of ohmic heating of plasma caused by a decrease in resistivity with an increase in the electron temperature. Three of the systems use electromagnetic waves in three frequency ranges, viz., the electron cyclotron (EC), the ion cyclotron (IC), and the LH resonance frequency and the fourth uses multiampere high-energy neutral beams (NBs) [2] These systems, either individually or in tandem, are designed to cover a range of operational requirements that include delivery of sufficient heating power to the core to access the H-mode confinement regime, and control of the plasma temperature with increasing density to bring the plasma to the desired operating point and to control any deviation around the operating point. This paper provides a brief overview of the requirements, development efforts, and the present status of the EC, IC, and NB systems planned for ITER
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
