SIKA Project

Sika – Cold Neutron Triple-Axis Spectrometer
Instrument Scientists
Dr Shin-ichiro Yano
Dr Chun-Ming Wu
Dr Kirrily Rule
Dr Guochu Deng

Instrument Cabin Phone 
+61 2 9717 3728

SIKA—Taiwan First Cold Neutron Triple-Axis Spectrometer Built at OPAL

The construction project of the cold neutron, triple-axis spectrometer named SIKA was completed at the end of 2012.  In 2013, National Central University who lead the construction project handed over the instrument to the National Synchrotron Radiation Research Center to lead the commissioning and user program.   In September 2014 we will have our first call for proposals, and officially open the instrument to domestic and international users.

SIKA is equipped with a large (230 x 252 mm2) double-focusing graphite monochromators to provide a large neutron flux on sample.  A 13 blade horizontal focusing graphite analyser combined with He-3 tube or a one-dimensional position sensitive detector (48 wires) provides for great flexibility on how the neutrons are detected.

The combination of high neutron flux, good energy and momentum resolution, low background and a large dynamic range will make SIKA ideally suited to study of spin and lattice dynamics, magnon and phonon dispersion relations in single crystal sample.  Relaxation phenomena, critical scattering, soft-modes, and relaxation-effects in complex fluids, magnetism, ionic conductors, catalysts, H storage and functional energy-related materials will also play an important role in the science output of SIKA.  

Specifications

Instrument location:
>Cold-Neutron Beam-Tube CG4 in reactor beam hall
Monochromator:
>Pyrolytic Graphite (002), double focusing, incident energy range 2.43 < Ei < 30 meV
Flux at sample position:
>Expected to be ~2.4 x108 n/cm2s at 2.1 Å 
(double focusing, virtual source width 5 cm)
Söller Collimators:
>Pre-monochromator, post-monochromator, pre-analyser collimators: open, 20’, 40’, 60’
>Pre-(single) detector collimators: open, 20’, 40’, 60’
>Pre-PSD collimator: radial collimator
Angular ranges:
>28.4o ≤ 2ΘM ≤ 120o
>-100o ≤ 2ΘS ≤ 100o
>-90o ≤ 2ΘA ≤ 90o
Analyser:
>Pyrolytic Graphite (002), 13 blades, each 20mm x 150mm (W x H), ±90˚ individually rotated
Available Filters:
>2 x PG filter
>Be filter works < 5 meV
Detectors:
>3He Single Detector
>1D Position Sensitive Detector (PSD)
Publication: 
1Dual lattice incommensurabilities and enhanced lattice perfection by low-temperature thermal annealing in photoelectric (CH3NH3)PbBr3
Wen-Hsien Li,* Chi-Hung Lee, Tsu-Yin Ling, Ma-Hsuan Ma, Pai-Chun Wei, Jr-Hau He, Chun-Min Wu, Jen-Chih Peng, Guangyong Xu, Yang Zhao, and Jeffrey W. Lynn
Phys. Rev. M 5, 025401 (2021) ANSTO/NIST (IF=3.337)
2Charge transfer enhanced magnetic correlations in type‐II multiferroic Co3TeO6
Chi‐Hung Lee, Erdembayalag Batsaikhan, Ma‐Hsuan Ma, Wen‐Hsien Li*, Chin‐Wei Wang, Chun‐Min Wu, Hung‐Duen Yang, Jeffrey W. Lynn, and Helmuth Berger
Journal of the Chinese Chemical Society 68, 395-402 (2021) NIST (IF=1.210)
3Magnetic and structural dimer networks in layered K2Ni(MoO4)2
G. Senthil Murugan, K. Ramesh Babu, R. Sankar, W. T. Chen, I. Panneer Muthuselvam, Sumanta Chattopadhyay, and K.-Y. Choi
Phys. Rev. B 103, 024451 (2021) ANSTO (IF=4.036)
4Physical insights on the low lattice thermal conductivity of AgInSe2
Yingcai Zhu*, Bin Wei, Junyan Liu, Nathan Z. Koocher, Yongheng Li, Lei Hue, Wenke He, Guochu Deng, Wei Xu, Xueyun Wang, James M. Rondinelli, Li-Dong Zhao, Jeffrey Snyder. Jiawang Hong*
Material Today Physics 19, 100428, (2021) ANSTO (IF=31.041)
5Spin excitations and spin wave gap in the ferromagnetic Weyl semimetal Co3Sn2S2
Chang Liu, JianLei Shen, JiaCheng Gao, ChangJiang Yi, Di Liu, Tao Xie, Lin Yang, Sergey Danilkin, GuoChu Deng, WenHong Wang, ShiLiang Li, YouGuo Shi, HongMing Weng*, EnKe Liu* and HuiQian Luo*
Science China Physics, Mechanics & Astronomy volume 64, 217062 (2021) ANSTO (IF=4.226)