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Journal Articles

Neutron transport

Tamura, Itaru

Hamon, 28(4), p.204 - 207, 2018/11

A Neutron guide is one of the devices to transport neutron beam for long distance without sacrificing much neutrons; therefore, it can supply neutrons to many experimental instruments distributed in a large experimental hall. Also, by using a curved guide, only the neutrons in a required energy range can be transported, and $$gamma$$ rays and fast neutrons can be effectively eliminated, therefore the signal to background ratio is improved. In addition, a neutron beam can be branched by applying curved guides. Neutron guides are also used to control the divergence angle and intensity of the neutron beam supplied to the neutron instrument.

Journal Articles

Sub-millimeter synchrotron X-ray focusing by crystal bender

Yoneda, Yasuhiro; Matsumoto, Norimasa; Furukawa, Yukito*; Ishikawa, Tetsuya*

Physica Scripta, T115, p.995 - 997, 2005/00

Sagittal focusing is known as one of the most efficient focusing methods for synchrotron X-rays which increases the photon density at the sample position. Results are reported on the performance of a fixed height exit bender with an unribbed silicon (311) crystal. The fixed height exit was achieved by using a 4-point bending mechanism. This bending mechanism is designed for the SPring-8 standard double crystal monochromator (DCM) of bending-magnet beamlines and the bender is installed as a second crystal of the DCM. By using unribbed crystal, the focusing beam size was kept 0.5 mm in the energy ranges from 35 - 60 keV. Since mirrors for high-energy X-rays are still under development at the moment, focusing techniques by crystal bender are demanded for many practical applications.

Journal Articles

Two-dimensional X-ray focusing by crystal bender and mirrors

Yoneda, Yasuhiro; Matsumoto, Norimasa; Furukawa, Yukito*; Ishikawa, Tetsuya*

AIP Conference Proceedings 705 (CD-ROM), 4 Pages, 2003/00

Results are reported on the performance of a fixed height exit bender with an unribbed silicon (311) crystal. The anticlasic crveture can be minimized for a recutangular Si (311) focusing crystal with "clamped" or "builtin" boundary conditions if the length to width ratio of the crystal is 1.42. The test crystal used in this study was manufactured from a 98mm$$times$$90mm$$times$$2mm dimension of float zone silicon. After final etching, the ratio of the crystal is 1.435. The sub-millimeter sagittal focusing was achieved by using a 4-point bending mechanism in energy ranges from 30keV to 60keV.

Journal Articles

Development of neutron lens and neutron bender

Soyama, Kazuhiko; ; Ichikawa, Hiroki; *

Genshiryoku Kogyo, 43(10), p.36 - 41, 1997/10

no abstracts in English

Journal Articles

Development of neutron optical devices and its application at JRR-3M

Soyama, Kazuhiko; Suzuki, Masatoshi

ASRR-V: Proc., 5th Asian Symp. on Research Reactors, 2, p.894 - 900, 1996/00

no abstracts in English

Journal Articles

Transmission characteristics of a supermirror bender

Soyama, Kazuhiko; Suzuki, Masatoshi; Kodaira, Tsuneo; Ebisawa, Toru*; *; Tasaki, Seiji*

Physica B; Condensed Matter, 213-214, p.951 - 953, 1995/00

 Times Cited Count:1 Percentile:10.87(Physics, Condensed Matter)

no abstracts in English

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