|
ИСТИНА |
Войти в систему Регистрация |
ИСТИНА ИНХС РАН |
||
High-resolution neutron Fourier diffractometer at the IBR-2 pulsed reactor: a new conceptстатья Исследовательская статья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 11 апреля 2019 г.
- Авторы: Anatoly Balagurov, Dmitry Balagurov, Ivan Bobrikov, Andrey Bogdzel, Vladimir Drozdov, Andrey Kirilov, Vladimir Kruglov, Sergey Kulikov, Svetlana Murashkevich, Valentin Prikhodko, Vasily Shvetsov, Valery Simkin, Alexandre Sirotin, Nikolay Zernin, Valery Zhuravlev
- Журнал: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
- Том: 436
- Год издания: 2018
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 263
- Последняя страница: 271
- Аннотация: The High Resolution Fourier Diffractometer (HRFD) is a neutron time-of-flight spectrometer with a fast Fourier chopper and a correlation mode of data acquisition designed to study atomic and magnetic structures of crystalline materials with high resolution in reciprocal space. The HRFD was constructed in the early 1990s by a collaboration of JINR (Dubna), PNPI (Gatchina) and VTT (Espoo) and began operating routinely in 1994 at the IBR-2 pulsed reactor in Dubna. If correlation analysis is used, the HRFD Δd/d resolution is determined by the maximum rotational speed of the Fourier chopper. For Vmax=6000 rpm, “high-resolution” patterns are measured by backscattering detectors with Δd/d≈0.0015 despite a very short flight path (L≈20 m) between chopper and sample. Switching to a regular TOF-mode (without Fourier chopper) makes HRFD one of the world’s best high-intensity diffractometers. In this paper, the experience of using HRFD at IBR-2 is considered and a possible solution for some technical and methodical problems of Fourier diffractometry at a long-pulse neutron source recognized during its operation is discussed. New possibilities appearing after the recent substantial HRFD upgrade and further perspectives on the method are also presented.
- Добавил в систему: Балагуров Анатолий Михайлович