Optimization of ECR assisted pre-ionization in GLAST-III via Multiphysics simulation
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Sehrish Shakir
,
Riaz Khan
Abstract
Electron cyclotron resonance (ECR) is a common pre-ionization technique to assist ohmic startup in tokamaks. In this research, ECR assisted pre-ionization in GLAST-III tokamak is comprehensively investigated via Multiphysics 3D COMSOL simulations. Optimal conditions for ECR microwave absorption at fundamental mode are determined to achieve reliable plasma startup. The effect of filled gas pressure on the ECR plasma parameters such as plasma density and plasma temperature is thoroughly investigated in the range of 0.08–1 Pa. The results reveal that the ECR absorption of the incident microwaves is significantly enhanced at low enough filled argon pressure. The behavior of absorbed microwave power is significantly changed for different filled gas pressures. In case of high gas pressure, the microwave power is deposited locally in front of the waveguide, whereas in case of low pressure (0.08 Pa), the microwave power is uniformly deposited along the resonance layer. Moreover, the experimental investigation extends to nearly identical operating conditions, confirming the ECR absorption. The experimental data aligns with the simulation results, collectively affirming the efficacy of optimized pre-ionization in the low gas pressure scenario (0.08 Pa) within the GLAST-III tokamak.
Funding source: Grant-in-Aid from Planning Commission, Government of Pakistan and IAEA Co-Ordinated Research Project
Award Identifier / Grant number: CRP-F13018
Acknowledgment
The research team show their gratitude and sincere appreciation to Pakistan Tokamak Plasma Research Institute (PTPRI) initiative for funding and support of this research.
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Research ethics: The local Institutional Review Board deemed the study exempt from review.
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Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Competing interests: The authors declare no conflicts of interest regarding this article.
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Research funding: This project was partially supported by a Grant-in-Aid from Planning Commission, Government of Pakistan and IAEA Co-Ordinated Research Project (CRP-F13018).
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Data availability: The raw data can be obtained on request from the corresponding author.
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Articles in the same Issue
- Frontmatter
- Multilateral evaluation of the effects of utilizing thorium oxide in the Bushehr VVER-1000 reactor
- Comparison of modeling methods for the effective diffusivities of IO3− estimated in compacted bentonite using through-diffusion tests under aerobic conditions
- Analysis of initial core and time dependent fuel burnup for high temperature testing reactors (HTTRs)
- A detection and defense security system design for nuclear waste storage against stealth terrorists attack
- Optimization of ECR assisted pre-ionization in GLAST-III via Multiphysics simulation
- Fuzzy reliability algorithm for the shutdown system of research reactor
- System theory safety analysis of network malfunction in nuclear power plant distributed control systems
- Two phase flow analysis of micro channel evaporator to investigate effect of geometry on pressure and heat transfer coefficient with respect to volume of fraction
- Methodology for analyzing dose consequence using atmospheric dispersion code A2CDOSE
- Reliability analysis of digital reactor protection systems in floating nuclear power plants
- Study on comprehensive evaluation method of mental workload level
- Integrating reliability analysis into MBSE for FPGA-based safety critical I&C system design in nuclear power plants
- Calendar of events
