J.J. Joo

Development of the new KSTAR helium distribution box

Y.J. Lee, Sang Woo Kwag, N.H. Song, D.S. Park et autres

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Propagation of thermally induced oscillation in the KSTAR cryogenic loop

Hyun Jung Lee, Sang Jun Oh, J.J. Joo, N.W. Kim et autres

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Analysis of the effect of imbalanced flow on the KSTAR’s superconducting magnet

Hyunjung Lee, Y. M. Park, D. S. Park, Y. J. Lee et autres

The KSTAR superconducting (SC) magnets are cable-in-conduit-conductor (CICC) type magnets, which have a hundred parallel and twisted SC strands in a square conduit with a porosity of 0.36. They are cooled by the forced flow of supercritical helium with a 2bar pressure …

kr, us (code pays fourni par la source)

Commissioning result of the KSTAR in-vessel cryo-pump

Y.B. Chang, H.J. Lee, Y.M. Park, Y.J. Lee et autres

KSTAR in-vessel cryo-pump has been installed in the vacuum vessel top and bottom side with up-down symmetry for the better plasma density control in the D-shape H-mode. The cryogenic helium lines of the in-vessel cryo-pump are located at the vertical positions from …

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The maintenance record of the KSTAR helium refrigeration system

K.M. Moon, J.J. Joo, Nack Kim, Y.B. Chang et autres

Korea Superconducting Tokamak Advanced Research (KSTAR) has a helium refrigeration system (HRS) with the cooling capacity of 9 kW at 4.5 K. Main cold components are composed of 300 tons of superconducting (SC) magnets, main cryostat thermal shields, and SC current feeder …

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Test Results of Pressure Head Mitigation of Supercritical Helium Across Cold Circulators at KSTAR for the Justification of the ITER Central Solenoid Cooling Circuit Design

H.-S. Chang, R. Maekawa, A. Forgeas, M. Bonneton et autres

The pressure head necessary for the forced convection of supercritical helium (SHe) across the ITER superconducting (SC) magnet system is generated by centrifugal-compressor type cold circulators. From the viewpoint of the cryogenic system, simulation results indicate that the main challenge of the …

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The operational results of the KSTAR PF cryo-circuit

Hyunjung Lee, Y.M. Park, D.S. Park, Yong Sik Chu et autres

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Influence of Plasma Operation on the PF Circulator of KSTAR HRS System During 2010 Campaign

H. J. Lee, D. S. Park, Y. M. Park, K.M. Moon et autres

The helium refrigeration system (HRS) of the Korea Superconducting Tokamak Advanced Research (KSTAR), which was designed to provide an energetic equivalent cooling power of 9 kW at 4.5 K, has been operated successfully during the last three years since 2008. For the …

kr (code pays fourni par la source)

Stability Analysis of the KSTAR PF Busline

Y. M. Park, H. J. Lee, Yong Sik Chu, D. S. Park et autres

The Cable-In-Conduit Conductor (CICC) for the KSTAR buslines is made of NbTi superconducting (SC) strands. A busline consists of several electrical joints, which are the major heat load contributors to the busline cryo-system. In the poloidal field (PF) busline helium circuit, the …

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Feasibility Studies of the ITER Cryogenic System at KSTAR

H.-S. Chang, A. Forgeas, G. Vincent, R. Maekawa et autres

One of the main challenges of the ITER cryogenic system is to manage the large pulsed heat load variation generated by the superconducting magnet system during the fusion experiments. A solution proposed to smooth such pulses and verified by numerical simulations is …

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Influence of plasma operation on the PF circulator of KSTAR HRS System during 2010 campaign

H. J. Lee, D. S. Park, Y. M. Park, K.M. Moon et autres

The Helium Refrigerator System (HRS) of the Korea Superconducting Tokamak Advanced Research (KSTAR) which was designed to provide an energetic equivalent cooling power of 9 kW at 4.5 K, has been operated successfully during last three years since 2008. For the operation …

kr (code pays fourni par la source)

OPERATION RESULTS OF THE KSTAR HELIUM REFRIGERATION SYSTEM

H.-S. Chang, E. Fauve, D.-S. Park, J.J. Joo et autres

The "first plasma" (100 kA of controllable plasma current for 100 ms) of KSTAR has been successfully generated in July 2008. The major outstanding feature of KSTAR compared to most other Tokamaks is that all the magnet coils are superconducting (SC), which …

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