Takashi Nogami

Mechanical analysis of UHV flanges with low-impedance structures for the new generation light source

Baoyuan Bian, Yasunori Tanimoto, Takashi Uchiyama, Tohru Honda et autres

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

Hiroshi Sakai, Dai Arakawa, T. Furuya, K. Haga et autres

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 create stable, low-emittance, energy-recovered beams. The project focused on …

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

Hiroshi Sakai, Dai Arakawa, T. Furuya, K. Haga et autres

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 stable continuous wave (CW) superconducting …

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

Nao Higashi, C. Mitsuda, Shinya Nagahashi, Kentaro Harada et autres

Abstract 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, and the …

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

Norio Nakamura, Yasunori Tanimoto, Nao Higashi, Kentaro Harada et autres

Abstract 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 drastically with energy …

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

C. Mitsuda, H. Takaki, Ryota Takai, Takashi Nogami et autres

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, this new injection scheme …

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MAGNETIC FIELD EVALUATION OF AN OCTUPOLE TYPE CERAMICS CHAMBER WITH INTEGRATED PULSED MAGNET FOR BEAM INJECTION

Y. Lu, C. Mitsuda, Hiroyuki TAKAKI, Yukinori KOBAYASHI et autres

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

Y. Honda, Masahiro Adachi, Shu Eguchi, Masafumi Fukuda et autres

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 wavelength tunability to investigate the nonlinear response of materials. …

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Construction and Commissioning of Mid-Infrared SASE FEL at cERL

Y. Honda, Masahiro Adachi, Shu Eguchi, Masafumi Fukuda et autres

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 wavelength tunability to investigate the nonlinear response of materials. …

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

C. Mitsuda, Kengo Hamaji, Kentaro Harada, Koichi Iwamoto et autres

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. The magnet coils …

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

Yao Lu, Kentaro Harada, Yukinori Kobayashi, C. Mitsuda et autres

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 dipole kicker, whose bore is only …

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

C. Mitsuda, Kentaro Harada, Nao Higashi, Tohru Honda et autres

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 permanently, and accordingly, the …

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