Search Results - "Lim, Changhwan"

Experimental Investigation of the Heat Transfer Characteristics and Operation Limits of a Fork-Type Heat Pipe for Passive Cooling of a Spent Fuel Pool by Lim, Changhwan, Choi, Jonghwi, Kim, Hyungdae

“…A fork-type heat pipe (FHP) is a passive heat-transport and air-cooling device used to remove the decay heat of spent nuclear fuels stored in a liquid pool…”
Get full text

Interferometric Analysis of 1064-nm Nanosecond Laser Induced Copper Plasma by Young June Hong, Oh, Seong Y., Sung Yong Ha, Hee-Jin Kim, Changhwan Lim

“…This paper reports on the interferometric analysis of laser-induced plasma performed to investigate the spatial and temporal dynamics of a plasma column as a…”
Get full text

Gain Spectral Filtering for Spectral Enhancement of Mode-Locked Fiber Oscillators by Hwang, SungIn, Furuse, Hiroaki, Haik, Chosrowjan, Lim, Changhwan, Kawanaka, Junji, Miyanaga, Noriaki

“…Spectral enhancement of a mode-locked fiber oscillator has been proposed by using gain spectral filtering technique. A wide spectral width of 83 nm at 1030 nm,…”
Get full text

Modeling of end-pumped CW quasi-three-level lasers by Changhwan Lim, Izawa, Y.

“…A plane wave model has been developed to describe the dynamic behavior of end-pumped CW quasi-three-level lasers. We have derived algebraic equations and…”
Get full text

Study of Residual Stress and Surface Morphology Changes in Al2O3 Induced by Nd:YAG Laser Irradiation by Yeo, Sunmog, Hong, Sung-Ki, Lee, Sung-Jun, Lim, Changhwan, Park, Jae-Won

“…In this study, the residual stress and surface morphology changes in alumina plates by the irradiation of a Q-switched Nd:YAG laser were investigated. The…”
Get full text

Fork-end heat pipe for passive air cooling of spent nuclear fuel pool by Choi, Jonghwi, Lim, Changhwan, Kim, Hyungdae

“…•Proposed a new type of a gravity-assisted heat pipe for passive air cooling of SFP.•Developed a theoretical model to predict heat transfer behaviors and…”
Get full text

Wavelength-tunable few-cycle pulses in visible region generated through soliton-plasma interactions by Huang, Zhiyuan, Wang, Ding, Chen, Yifei, Zhao, Ruirui, Zhao, Yu, Nam, Sungmo, Lim, Changhwan, Peng, Yujie, Du, Juan, Leng, Yuxin

“…We numerically investigate the generation of wavelength-tunable few-cycle pulses in the visible spectral region through soliton-plasma interactions. We found…”
Get full text

Performance analyses of a steam condensation tube immersed in a saturated water pool: Effects of tube inclination by Amidu, Muritala Alade, Park, Junseok, Park, Youngjae, Lim, Changhwan, Jung, Satbyoul, Kim, Hyungdae

“…•Performance of a single condensation tube immersed in a saturated pool was studied.•Explicit heat structure coupling of CUPID and MARS codes was…”
Get full text

Hyperfine Structure Constants and Isotope Shift Determination in ZrI by Laser-Induced Fluorescence Spectroscopy by Lim, Changhwan, Nomaru, Keiji, Izawa, Yasukazu

Get full text

Researches on Laser Isotope Separation of Gadolinium and Boron by IZAWA, Yasukazu, LIM, Changhwan, OHARA, Hiroharu, NIKI, Hideaki, HASHIDA, Masaki

“…Laser isotope separation experiments of Gd and B by atomic and molecular methods, respectively, have been performed. Gadolinium-157 was selectively…”
Get full text

Study of operation dynamics for crystal temperature measurement in a diode end-pumped monolithic Yb:YAG laser by Moon, Hee-Jong, Lim, Changhwan, Kim, Guang-Hoon, Kang, Uk

“…A temperature measurement scheme was proposed in a diode end-pumped thin monolithic Yb:YAG laser by analyzing the red-shifting behaviors of each lasing peak…”
Get full text

Temperature rise measurement from lasing spectrum in a diode pumped Yb:YAG crystal by Won-Kyo Jung, Changhwan Lim, Hee-Jong Moon

“…A temperature measurement scheme using spectral shift was applied to a diode end-pumped Yb:YAG laser with ~ 4 W pumping level. The temperature rise was ~ 90 °C…”
Get full text

Interferoemtric Measureemnts of the Shock-Waves Generated by the High Energy Laser by Lim, Changhwan, Han, Jae-Min

“…The spatial and temporal evolution of the shock-waves generated by the high energy Nd:Glass laser at KAERI 1 were simultaneously measured by Nomarski…”
Get full text

Spectral Behaviors of Unidirectional Lasing from Various Semiconductor Square Ring Microcavities by Moon, Hee-Jong, Hyun, Kyung-Sook, Lim, Changhwan

“…Spectral behaviors of lasing from semiconductor square ring microcavities with structures for unidirectional laser oscillation were investigated. When a…”
Get full text

Experimental study of laser-induced air plasma using a Nomarski interferometer by Oh, Seong Y., Lim, Changhwan, Ha, Sung Yong, Nam, Sungmo, Han, Jaemin

“…The spatial and temporal evolution of plasma generated via laser-induced breakdown in air was investigated. The plasma was produced in air using a focused…”
Get full text

Highly efficient optical parametric chirped-pulse amplification based on BiB sub(3O) sub(6) and beta -BaB sub(2O) sub(4) crystals at low pump intensity by Yun, In Ho, Hong, Sung-Ki, Kim, Hee Jin, Lim, Changhwan, Yoon, Choon Sup

“…We report a very high signal gain of 1.13 x 10[super]7 at a low pump intensity of 260 MW/cm[super]2 in a two-stage optical parametric chirped-pulse amplifier…”
Get full text

Highly efficient optical parametric chirped-pulse amplification based on BiB 3O 6 and β-BaB 2O 4 crystals at low pump intensity by Yun, In Ho, Hong, Sung-Ki, Kim, Hee Jin, Lim, Changhwan, Yoon, Choon Sup

“…We report a very high signal gain of 1.13 × 10 7 at a low pump intensity of 260 MW/cm 2 in a two-stage optical parametric chirped-pulse amplifier (OPCPA),…”
Get full text

Highly efficient optical parametric chirped-pulse amplification based on BiB3O6 and β-BaB2O4 crystals at low pump intensity by Yun, In Ho, Hong, Sung-Ki, Kim, Hee Jin, Lim, Changhwan, Yoon, Choon Sup

Get full text

Spectrum of Scattered Light by an Ionized Two-level Atom by Lim, Changhwan, Kim, Kisik, Lee, Jongmin

“…The spectrum of scattered light by an ionized two-level atom is investigated. The ionization is considered as a damping out of the ordinary two-level system…”
Get full text

Study of Residual Stress and Surface Morphology Changes in Al sub(2)O sub(3) Induced by Nd:YAG Laser Irradiation by Yeo, Sunmog, Hong, Sung-Ki, Lee, Sung-Jun, Lim, Changhwan, Park, Jae-Won

“…In this study, the residual stress and surface morphology changes in alumina plates by the irradiation of a Q-switched Nd:YAG laser were investigated. The…”
Get full text