Koichi Kan

National Institutes for Quantum and Radiological Science and Technology

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Takafumi Kondoh

Osaka University

Jinfeng Yang

Osaka University

Yoichi Yoshida

Osaka University

Kimihiro Norizawa

Osaka University

Atsushi Ogata

Osaka University

Masao Gohdo

Osaka University

Makoto Nakajima

Osaka University

Itta Nozawa

Sumitomo Heavy Industries (Japan)

Masato Ota

Osaka University

Yuki Yoshida

National Institute of Information and Communications Technology

Cooperative Institutions

Osaka University

National Institutes for Quantum and Radiological Science and Technology

Japan Synchrotron Radiation Research Institute

SPring-8

Tohoku University

The University of Tokyo

High Energy Accelerator Research Organization

Institute for Laser Technology

Osaka Research Institute of Industrial Science and Technology

Nagoya University

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Intense THz source based on laser modulator and bunch compressor with electron beam ranging from 35 to 50 MeV

Koichi Kan Zhirong Huang Gabriel Marcus Z. Zhang

Ranging

10.1142/9789813279612_0024

Cite

Citations (2)

Bunch Length Measurement of Femtosecond Electron Beam by Monitoring Coherent Transition Radiation

6th Int. Particle Accelerator Conf. (IPAC'15), Richmond, VA, USA, May 3-8, 2015 (2015)

Itta Nozawa Masao Gohdo Koichi Kan Takafumi Kondoh Atsushi Ogata

Transition radiation

Length measurement

10.18429/jacow-ipac2015-mopty002

Cite

Citations (4)

Measurement of electron beam using interferometer and photoconductive antenna

Atomic Energy Society of Japan (2016)

Koichi Kan

Photoconductivity

Source

Cite

Citations (0)

Beam Parameter Measurement After Relocation of S-Band Linear Accelerator

7th International Particle Accelerator Conference (IPAC'16), Busan, Korea, May 8-13, 2016 (2016)

Itta Nozawa Masao Gohdo Koichi Kan Takafumi Kondoh Jinfeng Yang

Relocation

10.18429/jacow-ipac2016-mopmb027

Cite

Citations (0)

BEAM DYNAMICS IN FEMTOSECOND PHOTOCATHODE RF GUN

Koichi Kan J. Yang Takafumi Kondoh Kimihiro Norizawa Atsushi Ogata

A femtosecond electron bunch is essential for the observation of ultrafast reactions and phenomena in materials. In order to improve the time resolution of pulse radiolysis and ultrafast electron diffraction (UED), that involve the use of an ultrashort electron bunch and ultrashort light, a femtosecond photocathode RF gun was investigated experimentally. The bunch length was changed by space-charge effect and RF compression in the RF gun. Emittance of the femtosecond electron bunch was also varied by space-charge effect. Bunch charge generated in the RF gun was studied theoretically based on Schottky effect.

Photocathode

Electron gun

Ultrafast electron diffraction

Source

Cite

Citations (0)

Assessing efficacy of standard impregnation techniques on die-cast aluminum alloys using X-ray micro-CT

China Foundry (2024)

Ajith Bandara Koichi Kan Katanaga Yusuke Natsuto Soga Akifumi Koike

Utilizing lightweight Al alloys in various industrial applications requires achieving precise pressure tightness and leak requirements. Vacuum pressure impregnation (VPI) with thermosetting polymers is commonly used to address leakage defects in die-cast Al alloys. In this study, the efficacy of the VPI technique in sealing alloy parts was investigated using a combination of nondestructive micro X-ray computed tomography (micro XCT) and a standard leak test. The results demonstrate that the commonly used water leak test is insufficient for determining the sealing performance. Instead, micro XCT shows distinct advantages by enabling more comprehensive analysis. It reveals the presence of a low atomic number impregnates sealant within casting defects, which has low grey contrast and allows for visualizing primary leakage paths in 3D. The effective atomic number of impregnated resin is 6.75 and that of Al alloy is 13.69 by dual-energy X-ray CT. This research findings will contribute to enhancing the standard VPI process parameters and the properties of impregnating sealants to improve quality assurance for impregnation in industrial metals.

10.1007/s41230-024-3049-2

Cite

Citations (0)

Electro-Optic Detection for Terahertz Electric Field Contraction around Relativistic Electron Beams

The Japan Society of Applied Physics (2021)

Masato Ota Koichi Kan Soichiro Komada Yasunobu Arikawa Verdad C. Agulto

Source

Cite

Citations (0)

Development of double-decker pulse radiolysis

Review of Scientific Instruments (2012)

Koichi Kan Takafumi Kondoh Jinfeng Yang Atsushi Ogata Kimihiro Norizawa

Double-decker pulse radiolysis (DDPR), which utilizes double-decker electron beams, was investigated to develop a new pulse radiolysis with a high time resolution. The double-decker electron beams were generated by injecting two UV pulses into a photocathode radio-frequency gun. In the pulse radiolysis, one electron beam was used as a pump beam, and the other was converted to a probe pulse. Finally, as its first application, the DDPR was successfully used for observing solvated electrons in water, with a 10%–90% rise time of 8.6 ps.

Photocathode

Electron gun

10.1063/1.4731652

Cite

Citations (12)

Effects of emittance and space-charge in femtosecond bunch compression

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment (2008)

Koichi Kan Jinfeng Yang Takafumi Kondoh Kimihiro Norizawa Yuichi Yoshida

Ultrafast electron diffraction

Bunches

10.1016/j.nima.2008.08.140

Cite