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中子用戶計畫
用戶資訊
中子學校、研討會

Sika - 冷中子三軸散射儀
儀器科學家

矢野真一郎
吳浚銘
Kirrily Rule
鄧國初

儀控室電話
+61 2 9717 3728

SIKA---台灣首座建於澳洲OPAL反應爐之冷中子三軸散射實驗站

Q-E Map 為提供台灣國內學研界世界一流的中子實驗設施,行政院國家科學委員會(科技部前身)委託國立中央大學在澳洲雪梨附近的澳洲核能科學與技術組織(AustralianNuclear Science and Technology Organisation,ANSTO)興建一部冷中子三軸散射儀- SIKA。本中心奉行政院國家科學委員會交辦之指示,於此中子實驗設施試車成功後,承接其運轉及維護工作、協助國內各領域研究團隊前往澳洲ANSTO及世界其他中子設施執行中子實驗,並負責用戶培育及中子應用研究推廣業務。SIKA的運作讓台灣與國際的用戶群能利用SIKA進行頂尖的中子研究,藉由與全世界中子設施的合作以及參與國際中子研究機構,我們預期SIKA於民國104年上半年開始,服務台灣的用戶,期待在不久的將來能成功地提升台灣中子研究團隊的成長。

SIKA三軸光譜儀使用了非彈性中子散射技術來測量材料中的激發能量。這個技術給予了晶體材料之單晶在動力學特性上更深入的資料。測量激發光譜的理論分析提供了原子與原子 間相互作用的資料,像是原子間作用力,或是磁離子磁矩之間的相互作用。

Phonon由於 SIKA 配備有大反射面積230X252 mm2之石墨單色晶體,能提供高強度冷中子束(低能量)因而可以得到高解析微中子能量的變化,例如原子晶格的振盪激發(聲子)、電子自旋體系內的集體激發(磁振子)、 離子電場中磁性離子的激發(晶場分裂)、分子晶體中的原子擴散或旋轉運動。與美國NIST的熱中子三軸散射儀BT7一樣,SIKA配備有13根20X150 mm2之石墨分析體,多種氦3單偵測器模組(Single and Diffraction Detector),位置敏感型多偵測器度(PSD)。可獨立運作的分析晶體,搭配多元化的偵測器配置,讓SIKA除了可以執行傳統三軸散射儀的所有摸式之外,其多模式運作功能,可指定多個QE範圍作連續掃描,或是加速實驗速度的聚焦掃描等先進非彈性三軸散射儀操作模式。

儀器規格
實驗站位置:
>Cold-Neutron Beam-Tube CG4 in reactor beam hall
單色晶體:
>Pyrolytic Graphite (002), double focusing, incident energy range 2.43 < Ei < 30 meV
樣品位置之中子束強度:
>Expected to be ~2.4 x108 n/cm2s at 2.1 Å
(double focusing, virtual source width 5 cm)
準直器模組:
>Pre-monochromator, post-monochromator, pre-analyser collimators: open, 20’, 40’, 60’
>Pre-(single) detector collimators: open, 20’, 40’, 60’
>Pre-PSD collimator: radial collimator
中子束發射角度:
>28.4o ≤ 2ΘM ≤ 120o
>-100o ≤ 2ΘS ≤ 100o
>-90o ≤ 2ΘA ≤ 90o
分析晶體:
>Pyrolytic Graphite (002), 13 blades, each 20mm x 150mm (W x H), ±90˚ individually rotated
可選配之過濾晶體:
>2 x PG filter
>Be filter works < 5 meV
偵測器模組:
>3He Single Detector
>1D Position Sensitive Detector (PSD)
提供完整資訊的SIKA儀錶面板 友善的分析軟體界面


高負載樣品桌與多元化的樣品環境選擇



樣品傾角範圍:CF4-bottom loader
Upper tilt angle : ± 13o
Lower tilt angle : ± 15o

XYZ 軸移動範圍:
X travel range: ± 25 mm
Y travel range: ± 25 mm
Z travel range: ± 20 mm

樣品旋轉角度(ω)範圍:
Rotation range: ± 180o

承重能力:
With 5 Axes goniometer stage: 150 kg
S1 rotary stage: 650 kg
(Ref: 12 Magnet is ~550 kg)

樣品環境設備列表
代號 名稱 描述 控溫範圍
AVM-1 12T asym., vertical field magnet 12 Tesla vertical field re-condensing magnet: 0.5T/min; it can accommodate dilution fridge. 1.5K-300K
CF-1 Cryofurnace, bottom loader Standard bottom loader for SIKA can reach 750K with high T insert; Can be used with electric field equipment. 8K-750K
CF-3 Cryofurnace, bottom loader Pooled bottom loader for general use can reach 750K with the high T insert 5K-750K
CF-4 Cryocooler, bottom loader Bottom loader can be used with electric field equipment or with 8T vertical field cryomagnet. 5K-300K
CF-7 Top loading, cryofurnace Top Loading AS Scientific Cryofurnace, it can reach 750K with full rang sample stick. 4K to 750K
CF-9 Top loading, cryofurnace Top Loading cryostat, it can be used with 8T vertical field cryomagnet. 2K to 300K
DL-1 Dilution fridge Dilution fridge can be used drop the minimum temperature to 0.05K Min: 0.05K
F-1 ILL-type vacuum furnace The 1600°C ILL-type high vacuum furnace is heated by passing up to 300 A through a thin niobium element. Max: 1600°C
OC-1 Orange Cryostat LHe wet cryostat 1.5K-300K
OS-1 He-3 one-shot fridge Helium 3 cooled one shot fridge to be used with the orange cryostat OC-1 0.5K FOR 8hrs
VD-1 XCS vapour delivery system The Hiden Isochema XCS system is available for in-situ static or dynamic vapour delivery provides a maximum rate of 500 mL per minute Max: 50°C
 SIKA Publications
1SIKA-the multiplexing cold-neutron triple-axis spectrometer at ANSTO
C.-M. Wu,G. Deng, J.S. Gardner,P. Vorderwisch, W.-H. Li, S. Yano, J.-C. Peng and E. Imamovicc
Journal of Instrumentation, Volume 11, October (2016) ANSTO
2Correlations and dynamics of spins in an XY-like spin-glass (Ni0.4Mn0.6)TiO3 single-crystal system
R. S. Solanki, S. -H. Hsieh, C. H Du, G. Deng, C. W. Wang, J. S. Gardner, H. Tonomoto, T. Kimura, and W. F. Pong
Phys. Rev. B 95, 024425 (2017) ANSTO
3Local bonds anomalies and dynamics in bismuth ferrite
J. W. Lin, J. S. Gardner, C.-W. Wang, G. Deng, C. M. Wu, V. K. Peterson, and J. G. Lin*
AIP ADVANCES 7, 055836 (2017) ANSTO
4Magnetic correlations in the intermetallic antiferromagnet Nd3Co4Sn13
C W Wang, J W Lin, C S Lue, H F Liu, C N Kuo, R A Mole, and J S Gardner
J. Phys.: Condens. Matter 29, 435801 (2017) ANSTO
5Suppression of Magnetic Order before the Superconducting Dome in MnP
Shin-ichiro Yano*, Diane Lançon, Henrik M. Rønnow, Thomas C. Hansen, Eric Ressouche, Navid Qureshi, Bachir Ouladdiaf, and Jason S. Gardner
Journal of the Physical Society of Japan 87, 023703 (2018) ANSTO, ILL
6Spin-glass ground state in a triangular-lattice compound YbZnGaO4
Zhen Ma, Jinghui Wang, Zhao-Yang Dong, Jun Zhang, Shichao Li, Shu-Han Zheng, Yunjie Yu, Wei Wang, Liqiang Che, Kejing Ran, Song Bao, Zhengwei Cai, P. Čermák, A. Schneidewind, S. Yano, J. S. Gardner, Xin Lu, Shun-Li Yu, Jun-Ming Liu, Shiyan Li, Jian-Xin Li, and Jinsheng Wen
Phys. Rev. Lett. 120, 087201 (2018) ANSTO
7Spin dynamics and magnetoelectric coupling mechanism of Co4Nb2O9
Guochu Deng*, Yiming Cao, Wei Ren, Shixun Cao,* Andrew J. Studer, Nicolas Gauthier, Michel Kenzelmann, Gene Davidson, Kirrily C. Rule, Jason S. Gardner, Paolo Imperia, Clemens Ulrich, and Garry J. McIntyre
Phys. Rev. B 97, 085154 (2018) ANSTO
8The Martensitic Transformation in Indium-Thallium Alloys
T. R. Finlayson, G. J. McIntyre, and K. C. Rule
The Minerals, Metals and Materials Series, https://doi.org/10.1007/978-3-319-76968-4_45 (2018) ANSTO
9Low-energy spin dynamics of orthoferrites AFeO3 (A = Y, La, Bi)
Kisoo Park, Hasung Sim, Jonathan Leiner, Yoshiyuki Yoshida, Jaehong Jeong, Shin-ichiro Yano, Jason Gardner, Philippe Bourges, Milan Klicpera, Vladimir Sechovsky, Martin Boehm, J-G Park
J. Phys.: Condens. Matter 30, 235802 (2018) ANSTO
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