Design of neutral beam injection system for KSTAR tokamak

In, S.R.; Lee, K.W.; Jin, J.; Chang, Dae-Sik; Jeong, Seung Ho; Oh, Byung-Hoon; Bae, Y.S.; Park, Y.M.; Yang, H.L.

doi:10.1016/j.fusengdes.2011.01.056

Cited by 25 publications

(8 citation statements)

References 4 publications

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“…The working gas of the EAST-NBI is deuterium gas. In order to obtain a vacuum environment that meets the requirements of an NBI, considering the limited space of the experimental hall and the harsh electromagnetic environment, this vacuum system must fulfill the following conditions [4]: (1) a pumping speed for deuterium of one million liters per unit in seconds or higher and as small a geometric size as possible; (2) a completely clean vacuum without any pollution of the vacuum system; (3) long-term stable operation in a magnetic-field and neutron-irradiation environment; (4) easy installation and maintenance and low setup and operating costs.…”

Section: Requirements For East-nbi Vacuum Systemmentioning

confidence: 99%

Vacuum System Optimization for EAST Neutral Beam Injector

et al. 2021

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The neutral beam injector (NBI) generates a high-energy ion beam and neutralizes it, and then relies on drift transmission to inject the formed neutral beam into the fusion plasma to increase the plasma temperature and drive the plasma current. In order to better cooperate with the Experimental Advanced Superconductive Tokamak (EAST), part of the Chinese major national scientific and technological infrastructure, in carrying out long-pulse high-parameter physics experiments of 400 s and above, this paper considers the optimization of the current design and operation of the NBI beam line with a pulse width of 100 s. Based on an upgraded and optimized NBI vacuum chamber and the structure of the beam-line components, the gas-source characteristics under the layout design of the NBI system are analyzed and an NBI vacuum system that meets relevant needs is designed. Using Molflow software to simulate the transport process of gas molecules in the vacuum chamber, the pressure gradient in the vacuum chamber and the heat-load distribution of the low-temperature condensation surface are obtained. The results show that when the NBI system is dynamically balanced, the pressure of each vacuum chamber section is lower than the set value, thus meeting the performance requirements for the NBI vacuum system and providing a basis for subsequent implementation of the NBI vacuum system upgrade using engineering.

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Section: Requirements For East-nbi Vacuum Systemmentioning

confidence: 99%

Vacuum System Optimization for EAST Neutral Beam Injector

et al. 2021

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“…More detailed descriptions of the present KSTAR neutral beam line design and characteristics are found in Ref. [9].…”

Section: Beam Line Systemmentioning

confidence: 99%

Commissioning of the first KSTAR neutral beam injection system and beam experiments

Bae

Park

Kim

et al. 2012

Fusion Engineering and Design

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“…First neutral beam injection system for the KSTAR (Korea Superconducting Tokamak Advanced Research) facility plasma experiments has been operated until now (2021) according to the annual plasma operation plan after the successful commissioning on 2010 [1,2]. Figure 1 and 2 show side view of the 1 st neutral beam injector (NBI-1) and 3-dimensional layout of the cryosorption pumping module, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…In general, the effective vacuum pumping speeds Sp of a cryo-sorption pump can be estimated from the equations 1 to 3 [2,6,7], where Co, α, C, A, vav, T, and M are, respectively, orifice conductance, pumping probability, orifice conductance per unit area, pumping surface area, average gas velocity, temperature, and molecular mass number in MKS unit.…”

Section: Introductionmentioning

confidence: 99%

Maintenance of the 1^st NBI vacuum system for the KSTAR tokamak

Lee

Park

Kim

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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First neutral beam injection system for the KSTAR tokamak has been operated after the installation and commissioning on 2010. To provide 120 keV and more than 6 MW deuterium neutral beam, it requires large vacuum pumping system with the pumping speeds 1.0E6 l/s range. For this purpose, R&D works with a prototype cryosorption panel had performed from Korea Atomic Energy Research Institute (KAERI) and GM cooler based 2 stage cryosorption pump was accepted for the 1st NBI system. During 10 years of annual operation, the pumping speeds decreased continuously due to the damage in cryopanels and all of the cryopanels were repaired for the 2021 KSTAR campaign. Details of the 1st KSTAR NBI vacuum pumping system will be introduced and long operation results including the behavior after the repair, will be reported in this paper.

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Design of neutral beam injection system for KSTAR tokamak

Cited by 25 publications

References 4 publications

Vacuum System Optimization for EAST Neutral Beam Injector

Vacuum System Optimization for EAST Neutral Beam Injector

Commissioning of the first KSTAR neutral beam injection system and beam experiments

Maintenance of the 1^st NBI vacuum system for the KSTAR tokamak

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Design of neutral beam injection system for KSTAR tokamak

Cited by 25 publications

References 4 publications

Vacuum System Optimization for EAST Neutral Beam Injector

Vacuum System Optimization for EAST Neutral Beam Injector

Commissioning of the first KSTAR neutral beam injection system and beam experiments

Maintenance of the 1st NBI vacuum system for the KSTAR tokamak

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Product

Resources

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Maintenance of the 1^st NBI vacuum system for the KSTAR tokamak