High Resolution Chopper Spectrometer (HRC) at J-PARC

Itoh, Shinichi; Yokoo, Tetsuya; Satoh, Setsuo; Yano, Shin Ichiro; Kawana, Daichi; Suzuki, Jun–ichi; Sato, Taku

doi:10.1016/j.nima.2010.11.107

Cited by 79 publications

(29 citation statements)

References 11 publications

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“…The energy resolution can be improved when ∆t ch < ∆t m , with a concomitant reduction in the peak neutron intensity within an acceptable tradeoff. We confirmed that, under limited conditions, the neutron intensity and the energy resolution were in good agreement with the design values [1]. Also, we installed the DAQ (data acquisition) system, and verified the data acquisition process and data analysis process [2].…”

Section: Introductionsupporting

confidence: 73%

“…The High Resolution Chopper Spectrometer (HRC) was installed at the BL12 beam port in the Material and Life Science Facility (MLF), the Japan Proton Accelerator Research Complex (J-PARC), in order to study dynamics in condensed matters with high-resolutions and relatively highenergy neutrons [1,2]. A schematic layout of the HRC is illustrated in Fig.…”

Section: Introductionmentioning

confidence: 99%

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Progress in High Resolution Chopper Spectrometer, HRC

et al. 2013

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The High Resolution Chopper Spectrometer (HRC) was installed at J-PARC, to study dynamics in condensed matters with high-resolutions and relatively-high-energy neutrons. Although the HRC was damaged by the earthquake disaster, we recovered and started neutron scattering experiments. During the recovery works, we also improved the performance of the HRC, by installing a supermirror guide tube, a collimator system, an experiment control environment etc.

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Section: Introductionsupporting

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Progress in High Resolution Chopper Spectrometer, HRC

et al. 2013

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“…The crystal orientation was determined using the x-ray Laue method (YXLON MG452, 450 kV/5 mA). Inelastic neutron scattering experiments were performed on the High Resolution Chopper Spectrometer (HRC) [39][40][41] installed at the Materials and Life Science Facility, in the Japan Proton Accelerator Research Complex. DAVE/MSlice 42 was used for analyzing the data.…”

Section: Methodsmentioning

confidence: 99%

Damped spin-wave excitations in the itinerant antiferromagnet γ−Fe0.7Mn0.3

et al. 2017

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The collective spin-wave excitations in the antiferromagnetic state of γ-Fe0.7Mn0.3 were investigated using the inelastic neutron scattering technique. The spin excitations remain isotropic up to the high excitation energy,hω = 78 meV. The excitations gradually become broad and damped above 40 meV. The damping parameter γ reaches 110(16) meV athω = 78 meV, which is much larger than that for other metallic compounds, e.g., CaFe2As2 (24 meV), La2−2xSr1+2xMn2O7 (52 − 72 meV), and Mn90Cu10 (88 meV). In addition, the spin-wave dispersion shows a deviation from the relation (hω) 2 = c 2 q 2 +∆ 2 above 40 meV. The group velocity above this energy increases to 470(40) meVÅ, which is higher than that at the low energies, c = 226(5) meVÅ. These results could suggest that the spin-wave excitations merge with the continuum of the individual particle-hole excitations at 40 meV.

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“…The High Resolution Chopper Spectrometer (HRC) offers high resolutions and delivers relatively high-energy neutrons for a wide range of studies on the dynamics of materials [13,15,16]: the range of incident neutron energies E i = 5-2000 meV is available, and especially, by using E i ≤ 300 meV, energy resolution of ∆E/E i = 2% can be achieved in the best case. For conventional experiments, the energy resolution is set to ∆E/E i = 3-10% to increase the neutron flux.…”

Section: High Resolution Chopper Spectrometer Hrcmentioning

confidence: 99%

Materials and Life Science Experimental Facility (MLF) at the Japan Proton Accelerator Research Complex II: Neutron Scattering Instruments

Nakajima

Kawakita

Itoh

et al. 2017

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Abstract:The neutron instruments suite, installed at the spallation neutron source of the Materials and Life Science Experimental Facility (MLF) at the Japan Proton Accelerator Research Complex (J-PARC), is reviewed. MLF has 23 neutron beam ports and 21 instruments are in operation for user programs or are under commissioning. A unique and challenging instrumental suite in MLF has been realized via combination of a high-performance neutron source, optimized for neutron scattering, and unique instruments using cutting-edge technologies. All instruments are/will serve in world-leading investigations in a broad range of fields, from fundamental physics to industrial applications. In this review, overviews, characteristic features, and typical applications of the individual instruments are mentioned.

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High Resolution Chopper Spectrometer (HRC) at J-PARC

Cited by 79 publications

References 11 publications

Progress in High Resolution Chopper Spectrometer, HRC

Progress in High Resolution Chopper Spectrometer, HRC

Damped spin-wave excitations in the itinerant antiferromagnet γ−Fe0.7Mn0.3

Materials and Life Science Experimental Facility (MLF) at the Japan Proton Accelerator Research Complex II: Neutron Scattering Instruments

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