F. Hinode

Influence of Vacuum Window on the Measurement of Coherent Smith–Purcell Radiation at t‐ACTS

Kenichi Nanbu, F. Hinode, Shigeru Kashiwagi, Hiroyuki Hama et autres

In this article, we study classical radiation from relativistic electrons at a facility, a test accelerator as a coherent terahertz source (t‐ACTS), at the Research Center for Accelerator and Radioisotope Science (RARiS), Tohoku University. We have previously studied coherent Smith–Purcell radiation from …

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Investigating Coherent Smith–Purcell Radiation from Shallow Blazed Gratings: Shading Effect’s Influence on Surface Current Model

Hiroki Yamada, Toshiya Muto, F. Hinode, Shigeru Kashiwagi et autres

To evaluate the characteristics of Smith–Purcell radiation, we modified a surface current model to consider the geometrical shading effect of a grating, which was ignored in the original one, and compared it with measurements for a grating with a shallow blaze angle. …

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High Average Current Electron Beam Generation Using RF Gated Thermionic Electron Gun

Anjali Bhagwan Kavar, Shigeru Kashiwagi, Kai Masuda, Toshiya Muto et autres

High-current electron beams can significantly enhance the productivity of variety of applications including medical radioisotope (RI) production and wastewater purification. High-power superconducting radio frequency (SRF) linacs are capable of producing such high-current electron beams due to the key advantage to operate in …

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High Average Current Electron Beam Generation Using RF Gated Thermionic Electron Gun

Anjali Bhagwan Kavar, Shigeru Kashiwagi, Kai Masuda, Toshiya Muto et autres

High-current electron beams can significantly enhance the productivity of variety of applications including medical radioisotope (RI) production and wastewater purification. High-power superconducting radio frequency (SRF) linacs are capable of producing such high-current electron beams due to the key advantage to operate in …

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Erratum: Numerical Study of a High Current Thermionic Electron Gun for a Superconducting Radio Frequency Linac

Anjali B. Kavar, Shigeru Kashiwagi, Kai Masuda, Toshiya Muto et autres

In the original article, there was a major mistake in the vertical scale of Figure 1, which has been fixed. The graph has also been improved with refined parameters in the simulation like mesh size.

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Numerical Study of a High Current Thermionic Electron Gun for a Superconducting Radio Frequency Linac

Anjali B. Kavar, Shigeru Kashiwagi, Kai Masuda, Toshiya Muto et autres

Electron linacs based on superconducting radio frequency (SRF) technology are gaining attention as a highly efficient and high-power electron beam (EB) source for variety of applications. We also intend to apply the SRF technology for wastewater purification and radioactive isotope production that …

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Variably polarized superradiant THz source employing crossed undulator configuration

H. Saito, Toshiya Muto, Shigeru Kashiwagi, F. Hinode et autres

Amplitude and Phase Control of RF Pulse Using IQ Modulator to Improve Electron Beam Quality

Shimon Yamada, Shigeru Kashiwagi, Ikuro Nagasawa, Kenichi Nanbu et autres

A test-Accelerator as Coherent Terahertz Source (t-ACTS) has been under development at Tohoku University, in which an intense coherent terahertz radiation is generated from the short electron bunches. Velocity bunching scheme in a traveling wave accelerating structure is employed to generate the …

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Study of Coherent Smith–Purcell Radiation in the Terahertz Region Using Ultra-Short Electron Bunches

Hiroki Yamada, Toshiya Muto, F. Hinode, Shigeru Kashiwagi et autres

Smith–Purcell radiation (SPR) can be generated nondestructively, providing valuable applications in light sources and beam monitors. Coherent SPR is expected to enable single-shot measurements of very short bunch lengths on the fs scale. Since the reconstruction of the longitudinal bunch shape from …

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The International Linear Collider: Report to Snowmass 2021

A. Aryshev, T. Behnke, M. Berggren, James Brau et autres

The International Linear Collider (ILC) is on the table now as a new global energy-frontier accelerator laboratory taking data in the 2030s. The ILC addresses key questions for our current understanding of particle physics. It is based on a proven accelerator technology. …

The International Linear Collider: Report to Snowmass 2021

Ichiro Adachi, Kaustubh Agashe, Tatjana Agatonovic Jovin, H. Aihara et autres

The International Linear Collider (ILC) is on the table now as a new global energy-frontier accelerator laboratory taking data in the 2030s. The ILC addresses key questions for our current understanding of particle physics. It is based on a proven accelerator technology. …

交叉型アンジュレータを用いた THz 域偏光可変超放射発生の研究

Hirotoshi SAITO, Toshiya MUTO, Shigeru Kashiwagi, F. Hinode et autres