J. H. Choi

Pattern formation in driven condensates

Kiryang Kwon, J. H. Choi

Spontaneous pattern formation out of homogeneous media is one of the well-understood examples of hydrodynamic instabilities in classical systems, which naturally leads to the question of its manifestation in quantum fluids. Bose-Einstein condensates (BECs) of atomic gases have been an ideal platform …

Pattern formation in driven condensates

Kiryang Kwon, J. H. Choi

Spontaneous pattern formation out of homogeneous media is one of the well-understood examples of hydrodynamic instabilities in classical systems, which naturally leads to the question of its manifestation in quantum fluids. Bose-Einstein condensates (BECs) of atomic gases have been an ideal platform …

A phase 2 randomized controlled trial using biologics to improve multi OIT outcomes (COMBINE): design, rationale, and methods

Amanda Long, Sayantani Sindher, K. Martinez, J. H. Choi et autres

Background Food allergy remains a serious public health concern associated with significantly lowered quality of life and the risk of potentially life-threatening allergic reactions. While oral immunotherapy (OIT) has consistently demonstrated efficacy in the desensitization of multi-food allergic patients, many patients undergoing …

us (code pays fourni par la source)

World’s Cheapest Readout Electronics for Kinetic Inductance Detector by Using RedPitaya

Naohito Tomita, Hoyong Jeong, J. H. Choi, H. Ishitsuka et autres

jp, kr (code pays fourni par la source)

Preliminary design of the ITER AC/DC converters supplied by the Korean Domestic Agency

Jong-Seok Oh, J. H. Choi, Jae-Hak Suh, H. Liu et autres

kr, fr (code pays fourni par la source)

Korean R&D on the converter controller for ITER AC/DC converters

Jae-Hak Suh, Jong-Seok Oh, J. H. Choi, E.H. Song et autres

The ITER coil power supplies provide controlled DC current to charge and stabilize the current in a toroidal field (TF) coil, and to establish and control the currents in a central solenoid (CS) module, poloidal field (PF) coils, and correction coils (CC) …

kr, fr, cn (code pays fourni par la source)

Korean R&D on the 6-pulse converter unit for ITER AC/DC converters

Jong-Seok Oh, J. H. Choi, Jae-Hak Suh, Hecheng Liu et autres

Korea is jointly responsible for the procurement package of ITER AC/DC converters shared between Korea and China. The collaborative activities among ITER Organization and Domestic Agencies under the frame of an Integrated Product Team have been underway since 2008 for the improvement …

kr, fr, cn (code pays fourni par la source)

The AC Loss Measurement of the KSTAR PF1 Coils During the First Commissioning

H J Lee, Dong Keun Oh, Yong Chu, Y M Park et autres

The AC loss in a large superconducting magnet coil shows a tendency to be changed after assembly. For the ac loss measurement of the Korea Superconducting Tokamak Advanced Research (KSTAR) superconducting coils after assembly, several current scenarios, trapezoidal pulses and a DC …

kr (code pays fourni par la source)

Superconducting magnet power supply system for the KSTAR 1st plasma experiment and engineering

J. H. Choi, C.H. Kim, D.K. Lee, K.H. Kim et autres

The Korea Superconducting Tokamak Advanced Research (KSTAR) device is an advanced superconducting tokamak to establish scientific and technological bases for an attractive fusion reactor. This device requires 3.5 Tesla of toroidal field (TF) for plasma confinement, and requires a strong poloidal flux …

kr (code pays fourni par la source)

Design of plasma shape control system for KSTAR tokamak

S.H. Hahn, J. H. Choi, J.K. Jin, Y.M. Jeon et autres

The development of the plasma shape control system of the Korea Superconducting Tokamak and Advanced Research (KSTAR) continues from the first utilization for plasma current/ major radii to the full-scale utilizations of the poloidal superconducting magnets and the in-vessel stabilization coils for …

kr, us (code pays fourni par la source)

Qualification Test Results of the KSTAR Superconducting Coils From the Construction to the Commissioning Steps

K.R. Park, Yong Chu, H. Yonekawa, E. N. Baang et autres

To achieve the first plasma of the Korea superconducting tokamak advanced research (KSTAR), the KSTAR superconducting coils were tested in advance. As they should operate in excessively low temperature of 4.5 K and high magnetic field environment of 7.5 T, it is …

kr (code pays fourni par la source)

Matter-Wave Interferometry with Phase Fluctuating Bose-Einstein Condensates

Gyu-Boong Jo, J. H. Choi, Caleb A. Christensen, Ye-Ryoung Lee et autres

Elongated Bose-Einstein condensates (BECs) exhibit strong spatial phase fluctuations even well below the BEC transition temperature. We demonstrate that atom interferometers using such condensates are robust against phase fluctuations; i.e., the relative phase of the split condensate is reproducible despite axial phase …

us (code pays fourni par la source)