SIKA - Cold 3-Axis Spectrometer

 

Instrument Scientists

Dr Shin-ichiro Yano

Dr Chun-Ming Wu

Dr Guochu Deng

Dr Kirrily Rule


More Information on SIKA:

  • Sample environment
  • Specifications
  • Fact sheet
  • Applications
  • Manual for users
  • Information for Taiwanese users
  • Publications
  • Instrument Schedule

 

SIKALOGO

 

SIKA
Instrument Cabin Phone 9717 3728

 


 

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


3-axis (or triple-axis) spectrometers were originally developed by Bert Brockhouse (Nobel Prize in Physics, 1994) at Chalk River in Canada, and he was awarded the Nobel Prize in part for this invention, along with the constant-Q method of operation and for a series of seminal experiments performed at Chalk River in the fifties and sixties. 

 

To provide Taiwanese users a world-class neutron experimental facility, Ministry of Science and Technology (formal National Science Council) funded the construction of a cold neutron triple-axis spectrometer, which is carried out by National Central University. The Taiwan-Australian neutron instrument SIKA is located at Australian Nuclear Science and Technology Organization (ANSTO), near Sydney, Australia. NSRRC took over the instrument in 2013 and has since commissioned the instrument and introduced it into the international user program. NSRRC is also responsible for the promotion of neutron research and user cultivation in Taiwan. 

 

sika rhs-chart

 

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 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.      

 

 

phonon dispersion

 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/cm2•s 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 ≤ 2_M ≤ 120º
>-100º ≤ 2_S ≤ 100º
>-90º ≤ 2_A ≤ 90º

Analyser:
>Pyrolytic Graphite (002), 13 blades, each 20mm x 150mm (W x H), ±90º individually rotated

Available Filters:
>2 x PG filter
>Be filter works < 5 meV

Detectors:
>3He Single Detector
>1D Position Sensitive Detector (PSD)

 

 

sika-dashboard

 

  analysis - software
Overall Information in SIKA Dashboard System     Friendly Analysis Software for Data Plotting and Fitting

  

Heavy Loading Sample Stage and Diversified Sample Environments

 


heavy loading stage sika

Tilt angle range:

 

Lower tilt angle : ± 15º

XYZ Translation:
X travel range: ± 25 mm
Y travel range: ± 25 mm
Z travel range: ± 20 mm

Sample Rotation(_):
Rotation range: ± 180º

Weight Capability:
With 5 Axes goniometer stage: 150 kg
S1 rotary stage: 650 kg

sika rhs 1 2

 

 

 

List of sample environments

 

Code

Name

Description

Temp range

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-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

Liquid-helium-cooled orange 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