Wen-Hsien Li (李文献)Center for Neutron Beam Applications

(中子束應用研究中心) National Central University (中央大學)

SIKA- the Taiwan contract cold TAS at OPAL

(2009年2月23日AONSA EC meeting)

whli@phy.ncu.edu.tw

National Central UniversityNational Central University

Official Arrangement bet. Taiwan & Australia․ Signed on June 8, 2005 by TECO & ACIO.․ NSC

(1) Construct a high-performance cold TAS within 4 years.

(2) 4 scientists to operate the cold TAS.(3) Obtain 70% of one instrument time

for NSC related scientists.(~240 days neutron beam time)

(4) Instrument time may be distributed overthe full set of instruments at OPAL reactor.

緣起緣起

*

Australian Nuclear Science and Technology Organisation (ANSTO)

OPALreactor

GuideHall

The locationThe location

Taiwanteamoffice

位於雪梨西南30公里處，時差2小時，飛行時間9小時

計畫目標計畫目標

1. Construction:To design & build a high performance cold neutron TAS at OPAL to be commissioning by 2010.(Project leads by NCU)

2. Operation:To run user programs, to operate SIKA. (4 scientists at ANSTO, 50 research projects / year) (From 2010 for 15 years)

Formosan sika deer

Spin-echo Inelastic K-space Analyzer

Triple-axis spectrometer → Inelastic scattering, analyzing k-space.

Cold TAS : ΔE ~ 0.1 to 1 meV

Spin-echo cold neutron triple-axis spectrometer

Spin-polarized Inelastic K-space AnalyzerUltra-high energy resolution

→ resonance spin echo techniqueWith RSET : ΔE ~ 1 to 100 μeV (optional)

SIKA projectSIKA project

HRPD高解析度中子繞射儀

TOF DCS飛逝時間散射儀

Reflectometer反射儀

Residual stress

HIPD高強度

中子繞射儀

SANS小角度散射儀

Quasi-LaueDiffractometer

Thermal-TAS熱三軸散射儀

Cold-TAS冷三軸散射儀

SIKA locationSIKA location At the OPAL reactor face, receiving CG4

SIKASIKA--The cold neutron tripleThe cold neutron triple--axis spectrometer at ANSTOaxis spectrometer at ANSTO

Virtual source

Collimator

DF Mono.

2θ=30。~135。

Operation areaOperation area

Sika: 45 m2

Taipan: 27 m2

Dance floor : GraniteGrade 0, precession < 10μm1650 × 1095 × 120 mm3

Interlock Cabinet

Motion Control Cabinet

DAE Cabinet

Dance Floor

Perimeter wall

45 m2

Spectrometer design

奈米物性實驗室

Beam port CG4Size of beam at reactor face 50 x 200 mm2 (W x H)Take-off angular range 2ΘM 30o ≤ 2ΘM ≤ 120o

Monochromator crystals HOPG, η = 24’, double focusing, Si(111)

Monochromator dimensions 220 x 340 mm2 (Width x Height)Useful wavelength range 1.74 Å ≤ λ ≤ 5.8 Å (PG 002)Correspond. wave-vector range 3.6 Å-1 ≤ ki ≤ 1.0 Å-1 (PG 002)Correspond. incident energy range 2.4 meV ≤ Ei ≤ 27 meV (PG 002)Virtual source aperture 0 ≤ W ≤ 65 mm ; H = 220 mmDistances- cold source – monochromator- reactor face – monochromator- virtual source – monochromator- monochromator – sample

6715 mm2300 mm2100 mm 2100 mm

Collimators- α1 (pre-monochromator) - α2 (post-monochromator)

20’, 40’, 60’, open 20’, 40’, 60’, open

Incident beam filters- Be cooled (10 cm) Ei < 5 meV- PG (8 cm) Ei = 13.7 & 14.7 meV- Sapphire (8 cm) Ei > 15 meV

Higher order suppression Higher order suppressionFast neutron suppression

2.4 meV ≤ Ei ≤ 31 meV(Si 111)

SIKA primary spectrometer specificationSIKA primary spectrometer specification

Monochromator:Double focusing

PG and Si

165.1

mm

162m

m

456m

m

210.9

mm1139.57mm

209.95mm

100m

m

200

mm

50mm

4.05mm

1401mm

1419mm

20 0 m m

50mm

138m

m

253

mm

68mm

19.2mm

Sour

ce

Beam TubeExit Port

4413.99mm Central to Reactor Face

2824.05mm Supermirror Guide, Top, Buttom, and Side M=32mm

2100mm

2100mm

Monochromator11×11 slabs

Slab size = 20×20 mm2Gap between slab = 0.5 mm

2ΘM

348

mm

225mm

Sample

Reactor Face

136m

m

259m

m

80mm250mm

VirtualSource

SecondaryShutter

Sapphirefilter inside

Collimators

900mm

1200mm

80 × 240 × 100 mm(L × H × W )

300mm

1070mm

730mm

250mm

250mm

600m

m

250mm

240m

m

Reactor core

Shielding drum

Reactor face

Double focusingPG/Si monochromator

SIKA primary spectrometerSIKA primary spectrometer

Collimator

Monochromator to sample : 2.1 m

Si mono雙向聚焦單色晶體

PG mono雙向聚焦單色晶體

Be, PG, Sapphire

filters過濾晶體

Neutron beam中子束

Collimators準直器

Beam shutter束線開關

Components inside the drum Components inside the drum

Side view

Shielding drum assembly videoShielding drum assembly video

• By AZ-System• 20 × 22 mm2 HOPG• 11 × 11 crystals• Double focusing

SIKA SIKA monochromatormonochromator

• By AZ-System• 17 × 210 × 10 mm3 Si• 13 crystals• Double focusing

HOPG(002)Si(111)

• Manufacture in TaiwanShielding drumShielding drum

January 2009 at鼎貿

SIKA sample stageSIKA sample stageWill go for

Huber tables

13 HOPG analyzer +1 PSD bank

SIKA secondary spectrometerSIKA secondary spectrometer

1 single detector + 1 diffraction PSD

SIKA secondary spectrometerSIKA secondary spectrometerAssembly:

Similar to that of BT-7, NIST but with electronics are placed at the

bottom

Electronics

2.1m

The team & timeline

奈米物性實驗室

Peter VorderwischConsultant

Chun-Chuen YangInstr. Scientist

Eno ImamovicDesigner

Chun-Ming WuInstr. Scientist

Geoff DuranceMCNP Consultant

Tzu-Neng ChanElectronics

The SIKA teamThe SIKA team

Wen-Hsien LiProject Leader

Jen-Chih PengSpect. control

Hui-Chia SuData analysis

Chin-Wei WangPhD. Student

Yi-Hsuan HungSecretary

Task Name2006 2007 2008 2009 2010

Qtr 1 Qtr 2 Qtr 3 Qtr 4 Qtr 1 Qtr 2 Qtr 3 Qtr 4 Qtr 1 Qtr 2 Qtr 3 Qtr 4 Qtr 1 Qtr 2 Qtr 3 Qtr 4 Qtr 1 Qtr 2 Qtr 3

SIKA Project PhasePRIMARY Spectrometer

Conceptual DesignMcStas (Performance, Optimization)MCNP SourceMCNP ShieldingConceptual Design Drawings

Engineering DesignCollimator change, Input opticsShielding

ProcurementMonochromator (PG & Si)Collimators, Input opticsSample ModuleShieldingElectronic ComponentsDance Floor (ANSTO)

SECONDARY SpectrometerConceptual DesignEngineering DesignProcurement

INSTALLATIONMonochromator ShieldingMechanical PartsElectrical PartsIT Systems

COMMISSIONINGOPERATION

t

SIKASIKA--timelinetimeline

SIKAA cold-neutron triple-axisspectrometer at ANSTO

SIKA project timelineSIKA project timeline

Conceptual design

Engineering design

Manufacture & procure

Assemble & install

Commissioning

Primary Secondary

2009200820072006 2010

SecondaryPrimary

Welcome to visitNCU Center for Neutron Beam Application

Physics DepartmentNational Central University, Taiwan