Research and facility of neutron scattering in Indonesia

Ikram, Abarrul; Bharoto,

doi:10.1016/s0921-4526(01)01049-3

Cited by 6 publications

(3 citation statements)

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“…To overcome these troubles, we began replacing, with the help of JAERI, some of the 32 detectors and our original 10 min collimators with 6 min ones [2]. The crystallographic and magnetic structures of various samples have been investigated, such as hightemperature superconducting materials (YBCO, BSCCO systems), magnetic materials (rare-earth-iron intermetallics), superionic conductors (AgI, Ag 2 S, AgPO 3 and their composites), dielectric materials (Aurivillius-type oxides), zeolites, and others.…”

Section: High Resolution Powder Diffractometermentioning

confidence: 99%

Scientific Review: Neutron Diffraction Activities in Serpong

et al. 2007

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The Neutron Scattering Laboratory at Serpong is equipped with three diffractometers: a powder diffractometer (PD), a four circle diffractometer/texture diffractometer (FCD/TD) and a high resolution powder diffractometer (HRPD). The powder diffractometer (PD) was the first instrument installed (1987) by JICA/Japan and is situated in the reactor experimental hall (XHR) of the multi-purpose reactor (RSG) GA Siwabessy. The two others were installed in 1992 under phase III of the Sumitomo project, together with other neutron scattering instruments. In 1995 the PD instrument was modified to allow for residual stress measurements (RSM) in collaboration with the Japan Atomic Energy Research Institute (JAERI). The detailed activities of this instrument are explained in elsewhere in this issue. High resolution powder diffractometerThe high resolution powder diffractometer (HRPD) is a versatile diffractometer to study both crystallographic and magnetic structures of powder samples. Since X-ray diffraction is rather insensitive to light atoms such as hydrogen and oxygen, neutron diffraction is indispensable for the structure determination of materials containing such light elements. Furthermore, neutrons have an inherent magnetic moment that enables probing many kinds of magnetic structures ranging from colinear-commensurate to incommensurate configurations.The high resolution powder diffractometer (HRPD) is installed at the second neutron guide (NG2) in the neutron guide hall (NGH) about 71 meters away from the reactor core. It consists of a monochromator, collimators, a sample table, and a multicounter system. The monochromator drum has three exits corresponding to three different take-off angles: 2θ M = 41.5°, 89°, and 130°. At present the instrument is set for 2θ M = 89°. Figures 1 and 2 show the instrument and the schematic diagram of HRPD, respectively.At the beginning, a pyrolitic graphite PG(004) focusing monochromator system comprised of five PG(004) single crystals provided a focused neutron beam having a wavelength of 2.352 Å. Although two PG(002) filters had been inserted in front of the sample with the consequence of reducing the beam intensity, higher order peaks were still apparent in the diffraction pattern, which confused the analysis. Later on, to overcome this problem, a hot pressed germanium single crystal replaced the PG monochromator [1] under a bilateral cooperation between JAERI and BATAN. The Ge(331) single crystal was pressed up to 70 kgcm −2 during heating at 850°C for one hour to increase the mosaic spread. Although the Ge(331) Figure 1. The HRPD instrument.Figure 2. Schematic diagram of HRPD.

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Section: High Resolution Powder Diffractometermentioning

confidence: 99%

Scientific Review: Neutron Diffraction Activities in Serpong

et al. 2007

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“…Cuplikan yang digunakan dalam eksperimen ini adalah TiO2 berbentuk bulk silinder yang diperoleh dari ANSTO dan diletakkan pada goniometer cuplikan. Pengukuran pola difraksi dilakukan menggunakan peralatan difraktometer neutron serbuk resolusi tinggi (DN3) yang terdapat di Pusat Teknologi Bahan Industri Nuklir -BATAN dengan panjang gelombang monokromator neutron termal 1,8223 Å yang dihasilkan oleh monokromator hot-pressed Ge(331) (15)(16)(17) . Data difraksi dikumpulkan pada sudut 2θ antara 2,5º hingga 157,5º dengan langkah 0,05º pada suhu ruang.…”

Section: Metodologiunclassified

Pengaruh Sudut Kolimasi Kolimator 2 Terhadap Resolusi Dan Intensitas Berkas Difraktometer Neutron Dn3

Fajar¹,

Mugirahardjo²

2010

gnd

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PENGARUH SUDUT KOLIMASI KOLIMATOR 2 TERHADAP RESOLUSI DAN INTENSITAS BERKASDIFRAKTOMETER NEUTRON DN3. Telah dilakukan studi efek perubahan sudut kolimasi kolimator 2 terhadapperforma difraktometer neutron serbuk DN3. Semakin besar sudut kolimasi kolimator 2 maka intensitas berkasterukur di detektor utama juga semakin tinggi. Sebaliknya resolusi peralatan menjadi semakin rendah pada suduthamburan rendah dan tinggi. Telah didiskusikan beberapa alternatif untuk meningkatkan kinerja peralatan DN3dengan mempertimbangkan kompromi antara resolusi dan intensitas seperti peningkatan kolimasi berkas danpemanfaatan sistem monokromator fokusing.Kata Kunci : difraktometer, intensitas, resolusi, TiO2

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“…Four-circle diffractometer/texture diffractometer (FCD/TD) of National Nuclear Energy Agency of Indonesia (BATAN) was installed at the NG2-1 beam port sited in the Reactor Experimental Hall (XHR) of the GA Siwabessy multi-purpose research reactor in Serpong, Indonesia. This dualpurpose diffractometer was designed for studies of crystal structure and texture measurements, and was constructed robustly to allow heavy attachments [1]. For experimental uses, the monochromator goniometer system can be moved in four directions, while the sample table can be controlled in three directions.…”

Section: Introductionmentioning

confidence: 99%

Automation of Four Circle Diffractomete /Texture Diffractometer for Studies of Crystal Structure and Texture Measurements

Bharoto

Ramadhani

Suparno

et al. 2014

AMR

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National Nuclear Energy Agency of Indonesia has several neutron beam instruments for materials science research. One of the instrument is Four Circle Diffractometer / Texture Diffractometer for study of crystal structure and texture measurement. Due to the instrument is fully occupied by many samples, the instruments has to be further developed in order to conduct experiment effectively and efficiently. For that reason, the instrument controller has been replaced with a new programmable controller that can handle all axis simultaneously. Since the controller has been replaced with the new one, a software for data acquisition and measurement also has been modified using a visual basic of programming language with an addition of function, i.e. an automatic measurement for either single-crystal or poly-crystal sample. The software calculates four peaks of Miller indices of the sample for determining the crystal position to be scanned. Then, the software performs the automatic measurement started from scanning the axis of θ-2θ, calculating the peak position by fitting the data obtained from sample diffraction data, then positioning the θ and 2θ axis to the peak position. Finally, the software performs the scanning of the π-χ axis for texture analysis, and save the experiment data into a certain format for the texture analysis software, i.e. Material Analysis Using Diffraction (MAUD).

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Research and facility of neutron scattering in Indonesia

Cited by 6 publications

References 0 publications

Scientific Review: Neutron Diffraction Activities in Serpong

Scientific Review: Neutron Diffraction Activities in Serpong

Pengaruh Sudut Kolimasi Kolimator 2 Terhadap Resolusi Dan Intensitas Berkas Difraktometer Neutron Dn3

Automation of Four Circle Diffractomete /Texture Diffractometer for Studies of Crystal Structure and Texture Measurements

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