Explanipedia

Stable operation of a fully energy-recovered 1-mA-class electron beam at a compact energy-recovery linac Open

Hiroshi Sakai, Dai Arakawa, T. Furuya, K. Haga, M. Hagiwara , et al. · 2025

A compact energy-recovery linac (cERL) has been under development at KEK to drive key accelerator technologies, demonstrate energy recovery under various conditions, and support beam applications. cERL began beam operations in 2013 to crea…

Stable beam operation of approximately 1 mA beam under highly efficient energy recovery conditions at compact energy-recovery linac Open

Hiroshi Sakai, Dai Arakawa, T. Furuya, K. Haga, M. Hagiwara , et al. · 2024

A compact energy-recovery linac (cERL) has been un-der construction at KEK since 2009 to develop key technologies for the energy-recovery linac. The cERL began operating in 2013 to create a high-current beam with a low-emittance beam with …

Modification of Beam Transport Line Design for Simultaneous Top-up Injection to PF and PF-AR Open

Nao Higashi, C. Mitsuda, Shinya Nagahashi, Kentaro Harada, Takashi Nogami , et al. · 2024

The High Energy Accelerator Research Organization (KEK) has two light sources: Photon Factory (PF, 2.5 GeV) and Photon Factory Advanced Ring (PF-AR, 6.5 GeV). In 2017, the operation of a new beam transport line (BT) of PF-AR was started, a…

Reconstruction and beam-transport study of the cERL dump line for high-power IR-FEL operation Open

Norio Nakamura, Yasunori Tanimoto, Nao Higashi, Kentaro Harada, Miho Shimada , et al. · 2023

Infrared (IR) SASE-FEL emission was successfully generated for macro pulses of about 1 μs with the maximum repetition rate of 5 Hz at the cERL. In the future, high-power FEL operation will be planned to increase electron bunches drasticall…

Suppression of eddy-current effects in beam injection using a pulsed sextupole magnet with a new ceramic chamber Open

C. Mitsuda, H. Takaki, Ryota Takai, Takashi Nogami, Takashi Uchiyama , et al. · 2022

At the Photon Factory storage ring (PF ring) of the High Energy Accelerator Research Organization (KEK), a pulsed sextupole magnet (PSM) has been used for top-up injection for the first time. Following its successful operation at the KEK, …

Construction and commissioning of mid-infrared self-amplified spontaneous emission free-electron laser at compact energy recovery linac Open

Y. Honda, Masahiro Adachi, Shu Eguchi, Masafumi Fukuda, Nao Higashi , et al. · 2021

The mid-infrared range is an important spectrum range where materials exhibit a characteristic response corresponding to their molecular structure. A free-electron laser (FEL) is a promising candidate for a high-power light source with wav…

Construction and Commissioning of Mid-Infrared SASE FEL at cERL Open

Y. Honda, Masahiro Adachi, Shu Eguchi, Masafumi Fukuda, Ryoichi Hajima , et al. · 2021

The mid-infrared range is an important spectrum range where materials exhibit a characteristic response corresponding to their molecular structure. A free-electron laser (FEL) is a promising candidate for a high-power light source with wav…

Construction of an Infrared FEL at the Compact ERL Open

Ryukou Kato, Masahiro Adachi, Shu Eguchi, Ryoichi Hajima, Kentaro Harada , et al. · 2021

The compact Energy Recovery Linac (cERL) has been in operation at KEK since 2013 to demonstrate ERL performance and develop ERL technology. Recently KEK has launched an infrared FEL project with a competitive funding. The purpose of this p…

Study of PF-Ring Infrastructure Improvements Using Temperature Measurements in the Ring Tunnel Open

Norio Nakamura, K. Haga, Takashi Nogami, M. Tadano · 2021

Temperature measurements have been performed in the PF-ring tunnel in order to understand the infrastructure performance and the temperature stability towards the PF upgrade project, where better beam stability will be required. Based on t…

Injection Section Upgrading with the Septum-Magnet Replacement in KEK-PF Ring Open

C. Mitsuda, Kentaro Harada, Nao Higashi, Tohru Honda, Yukinori Kobayashi , et al. · 2021

In 2015, the water leakage happened at the cooling pipe of the in-vacuum septum magnet installed into the injection point. Because the maintenance of the leakage needed the total replacement of the magnet, the water circulation was stopped…

Newly Development of Ceramics Chamber with Integrated Pulsed Magnet for Super-Narrow Bore in KEK-PF Open

C. Mitsuda, Kengo Hamaji, Kentaro Harada, Koichi Iwamoto, Yukinori Kobayashi , et al. · 2021

Ceramics chamber with integrated pulsed magnet (CCiPM) is a new air-core type magnet that has a plan to be used as a multipole injection magnet, a dipole injection kicker, and a fast correction kicker in the next-generation light source. T…

Magnetic Field Measurement and Beam Performance Test of Ceramics Chamber with Integrated Pulsed Magnet at KEK-PF Open

Yao Lu, Kentaro Harada, Yukinori Kobayashi, C. Mitsuda, Shinya Nagahashi , et al. · 2021

An air-core magnet named Ceramics Chamber with integrated Pulsed Magnet(CCiPM) is being developed at the photon factory of KEK(KEK-PF), which will have several applications for the future light source. One prototype has been developed as a…

Accelerator Implementing Development of Ceramics Chamber with Integrated Pulsed Magnet for Beam Test Open

C. Mitsuda, Teruo Honiden, Yukinori Kobayashi, Shinya Nagahashi, Tatsuro Nakanishi , et al. · 2019

We advance the development of Ceramics Chamber Integrated Pulsed Magnet (CCIPM) of air-core type as the application to low emittance ring with a narrow bore of light source accelerator in the future. The CCIPM is composed of ceramics cylin…

1 mA Stable Energy Recovery Beam Operation with Small Beam Emittance Open

T. Obina, Dai Arakawa, Masato Egi, T. Furuya, K. Haga , et al. · 2019

A compact energy-recovery linac (cERL) have been operating since 2013 at KEK to develop critical components for ERL facility. Details of design, construction and the result of initial commissioning are already reported*. This paper will de…

New Industrial Application Beamline for the cERL in KEK Open

Yu Morikawa, K. Haga, M. Hagiwara, Kentaro Harada, Nao Higashi , et al. · 2019

The new beam line for the industrial applications is constructed at the cERL (compact Energy Recovery LINAC) in KEK. In these applications, only north straight sections of cERL consisting of injector and main LINAC will be used. The test f…

Construction and commissioning of direct beam transport line for PF-AR Open

Nao Higashi, Seiji Asaoka, K. Furukawa, K. Haga, Kentaro Harada , et al. · 2017

PF-AR was constructed as an accumulator ring for TRISTAN, and in the KEKB era it has been revitalized as a 6.5 GeV synchrotron radiation source. The injection energy was 3 GeV and the beam was accelerated to 6.5 GeV prior to the user run. …

A New Stripline Kicker for PF-AR Transverse Feedback Damper Open

Ryota Takai, Tohru Honda, Takashi Nogami, T. Obina, Yasunori Tanimoto , et al. · 2017

A feedback damper equipped with a long stripline kicker was used to damp transverse beam oscillation at the Photon Factory Advanced Ring (PF-AR), which is a 6.5-GeV synchrotron radiation source of KEK. Recently, the stripline kicker was re…

CCDC 728253: Experimental Crystal Structure Determination Open

Yoshitomo Okamura, Takashi Nogami, Takayuki Ishida · 2017

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …

Construction of the New Kicker Magnet Systems for PF-Advanced Ring Open

Akira Ueda, Seiji Asaoka, Tohru Honda, Shinya Nagahashi, Norio Nakamura , et al. · 2017

From July 2016 we are constructing a new beam transport (BT) line for the Photon Factory Advanced Ring (PF-AR). The new BT line was designed to transport the full energy 6.5-GeV beam directly from the LINAC, and the top up injection will b…

NTT Communications India Pvt. Ltd. and Netmagic Solutions Pvt. Ltd. Open

Takashi Nogami · 2016

In 2003, NTT Communications (NTT Com) decided to establish a representative office to deliver its international circuits to mainly Japanese customers who were using NTT Com's circuits outside of India, and to establish new locations in Ind…

Measurement and Control of Beam Losses Under High Average-current Operation of the Compact ERL at KEK Open

S. Sakanaka, K. Haga, Y. Honda, Hiroshi Matsumura, Tsukasa Miyajima , et al. · 2016

The compact ERL (cERL)* is a superconducting accelerator aimed at demonstrating excellent ERL technologies for the future light source. The cERL comprises a 5 MeV injector, a main linac, and a recirculation loop. In the cERL, production an…

Vacuum system of the compact Energy Recovery Linac Open

Tohru Honda, Yasunori Tanimoto, Takashi Nogami, Ryota Takai, T. Obina , et al. · 2016

The compact Energy Recovery Linac (cERL), a test accelerator to establish important technologies demanded for future ERL-based light sources, was constructed in late 2013 at KEK. The accelerator was successfully commissioned in early 2014,…

Project to renew the undulators at the photon factory Open

K. Tsuchiya, Masahiro Adachi, Tatsuro Shioya, Tohru Honda, Yasunori Tanimoto , et al. · 2016

At the 2.5-GeV Photon Factory (PF) storage ring, we recently constructed four new undulators known as U#02-2, U#13, SGU#15, and U#28 for BL02, BL13, BL15, and BL28, respectively. SGU#15 is an in-vacuum undulator with a period length of 17.…

Recent Developments and Operational Status of the Compact ERL at KEK Open

T. Obina, Masahiro Adachi, Shin‐ichi Adachi, Tomoya Akagi, M. Akemoto , et al. · 2016

The Compact Energy Recovery Linac (cERL) at KEK is a test accelerator in order to develop key components to realize remarkable ERL performance as a future light source. After the beam commissioning in December 2013, the legal current limit…

Present Status of KEK Photon Factory and Future Project Open

Tohru Honda, Masahiro Adachi, Seiji Asaoka, K. Haga, Kentaro Harada , et al. · 2016

Two synchrotron radiation sources of KEK, the PF-ring and the PF-AR, continue their user operation with various improvements. Scrap and build of the first generation undulators of 1980s at the PF-ring is pushed forward year by year. Five n…

Recent Progress and Operational Status of the Compact ERL at KEK Open

S. Sakanaka, Masahiro Adachi, Shin‐ichi Adachi, Tomoya Akagi, M. Akemoto , et al. · 2015

The Compact Energy Recovery Linac (cERL) is a superconducting test accelerator aimed at establishing technologies for the ERL-based future light source. After its construction during 2009 to 2013, the first CW beams of 20 MeV were successf…

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