127 citations · 462 across the 19 of their papers we have counts for
19 papers
High-energy betatron source driven by a 4-PW laser with applications to non-destructive imaging
Calin Ioan Hojbota, Mohammad Mirzaie, Do Yeon Kim +10
Petawatt-class lasers can produce multi-GeV electron beams through laser wakefield electron acceleration. As a by-product, the accelerated electron beams can generate broad synchro…
Super-Heavy Ions Acceleration Driven by Ultrashort Laser Pulses at Ultrahigh Intensity
Pengjie Wang, Zheng Gong, Seong Geun Lee +17
The acceleration of super-heavy ions (SHIs) from plasmas driven by ultrashort (tens of femtoseconds) laser pulses is a challenging topic waiting for breakthrough. The detecting and…
Optical Shaping of Plasma Cavity for Controlled Laser Wakefield Acceleration
Bobbili Sanyasi Rao, Myung Hoon Cho, Hyung Taek Kim +7
Laser wakefield accelerators rely on relativistically moving micron-sized plasma cavities that provide extremely high electric field >100GV/m. Here, we demonstrate transverse shapi…
Accurate single-shot measurement technique for the spectral distribution of GeV electron beams from a laser wakefield accelerator
Calin Ioan Hojbota, Hyung Taek Kim, Jung Hun Shin +3
We present a technique, based on a dipole magnet spectrometer containing multiple scintillation screens, to accurately characterize the spectral distribution of a GeV electron beam…
Proof-of-principle experiment for nanoparticle-assisted laser wakefield acceleration
Constantin Aniculaesei, Vishwa Bandhu Pathak, Kyung Hwan Oh +9
In the present work, we demonstrate for the first time a proof-of-principle experiment for nanoparticle-assisted laser wakefield acceleration. The nanoparticles, generated through…
Entropy-based view of the strong field ionization process
I. A. Ivanov, Chang Hee Nam, Kyung Taec Kim
We apply information theoretic entropies of coordinate and velocity distributions in quantum mechanics for the description of the strong field ionization process. The approach is b…
Electron energy increase in a laser wakefield accelerator using longitudinally shaped plasma density profiles
Constantin Aniculaesei, Vishwa Bandhu Pathak, Hyung Taek Kim +13
The phase velocity of the wakefield of a laser wakefield accelerator can, theoretically, be manipulated by shaping the longitudinal plasma density profile, thus controlling the par…
Instantaneous ionization rate as a functional derivative
I. A. Ivanov, C. Hofmann, L. Ortmann +3
We describe an approach defining instantaneous ionization rate (IIR) as a functional derivative of the total ionization probability. The definition is based on physical quantities…
Bright muon source driven by GeV electron beams from a compact laser wakefield accelerator
Bobbili Sanyasi Rao, Jong Ho Jeon, Hyung Taek Kim +1
We report here a systematic quantitative study on generation and characteristics of an active muon source driven by the interaction of an electron beam within the energy range of 1…
Laser acceleration of highly energetic carbon ions using a double-layer target composed of slightly underdense plasma and ultrathin foil
W. J. Ma, I Jong Kim, J. Q. Yu +18
We report the experimental generation of highly energetic carbon ions up to 48 MeV per nucleon by shooting double-layer targets composed of well-controlled slightly underdense plas…
Novel gas target for Laser Wakefield Accelerators
Constantin Aniculaesei, Hyung Taek Kim, Byeong Ju Yoo +2
A novel gas target for interactions between high power lasers and gaseous medium, especially for laser wakefield accelerators, has been designed, manufactured and characterized. Th…
Quantum Phase Analysis of Field-Free Molecular Alignment
Sang Jae Yun, Chul Min Kim, Jongmin Lee +1
We present quantum mechanical explanations for unresolved phenomena observed in field-free molecular alignment by a femtosecond laser pulse. Quantum phase analysis of molecular rot…
Molecular quantum rotors in gyroscopic motion with a nonspreading rotational wavepacket
Sang Jae Yun, Chang Hee Nam
We provide a way of generating and observing molecular quantum gyroscopic motion that resembles gyroscopic motion of classical rotors. After producing a nonspreading rotational wav…
Quantum Computation with Rotational States of Nonpolar Ionic Molecules
Sang Jae Yun, Chang Hee Nam
We propose a quantum computer architecture which is robust against decoherence and scalable. As a qubit, we adopt rotational states of a nonpolar ionic molecule trapped in an ion-t…
New frontier of laser particle acceleration: driving protons to 93 MeV by radiation pressure
I Jong Kim, Ki Hong Pae, Chul Min Kim +10
The radiation pressure acceleration (RPA) of charged particles has been considered a challenging task in laser particle acceleration. Laser-driven proton/ion acceleration has attra…
Ising interaction between two qubits composed of the highest magnetic quantum number states through magnetic dipole-dipole interaction
Sang Jae Yun, Jaewan Kim, Chang Hee Nam
In quantum information processing, one of the most useful interaction between qubits is the Ising type interaction. We propose a scheme to implement the exact Ising interaction thr…
Sub-100-as timing jitter optical pulse trains from mode-locked Er-fiber lasers
Tae Keun Kim, Youjian Song, Kwangyun Jung +4
We demonstrate sub-100-attosecond timing jitter optical pulse trains generated from free-running, 77.6-MHz repetition-rate, mode-locked Er-fiber lasers. At -0.002(\pm0.001) ps2 net…
Comparison of RABITT and FROG measurements in the temporal characterization of attosecond pulse trains
Kyung Taec Kim, Kyung Sik Kang, Mi Na Park +3
The attosecond high harmonic pulses obtained from a long Ar-filled gas cell were characterized by two techniques - the reconstruction of attosecond beating by interference of two-p…
Plasma-Induced Frequency Chirp of Intense Femtosecond Lasers and Its Role in Shaping High-Order Harmonic Spectral Lines
Jung-Hoon Kim, Chang Hee Nam
We investigate the self-phase modulation of intense femtosecond laser pulses propagating in an ionizing gas and its effects on collective properties of high-order harmonics generat…