Ion Beam Facilities in Japan (TIARA/DuET/HIT) Eiichi Wakai (MLF, - - PowerPoint PPT Presentation

Session: Low Energy Ion Beam Facilities & PIE Activities in Japan

Ion Beam Facilities in Japan (TIARA/DuET/HIT) Eiichi Wakai (MLF, J‐PARC Center, JAEA )

R a D I A T E

4th Collaboration Meeting in IVIL of Tokai‐mura, Japan during 20‐22th Sep. 2017

R a D I A T E

4th Collaboration Meeting in IVIL of Tokai‐mura, Japan during 20‐22th Sep. 2017

September 22, 2017

NBI2017+RaDIATE

Content 1. Research Background

• 2. Introduction of Ion Beam Facilities in Japan

(TIARA/DuET/HIT)

• 3. Some Results
• 4. Summary

1. Research Background

 Merit of Low Energy Multiple‐Ion Beam Experiment: (1) Higher dpa rate (about 5 dpa/h) (2) No radioactivity (3) Relatively low cost operation (4) He/dpa and H/dpa can be controlled for the purpose

1. Research Background

 Irradiation hardening can be estimated from microstructural analysis.

• E. Wakai, et al.,

Tensile Properties TEM images

Radiation hardening estimated from Microstructures

• 2. Introduction of Ion Beam

Facilities in Japan(TIARA/DuET/HIT)

 Triple Ion Irradiation Facility of JAEA (QST at present) Takasaki city, Gunma‐prefecture, Japan

• 2. Introduction of Ion Beam

Facilities in Japan(TIARA/DuET/HIT)

He H Fe

H+ (Ion implanter) Degrader Specimen

 Triple Ion Irradiation Facility of JAEA (QST at present)

10.5 MeV Fe2+, 1.05 MeV-He+, 0.38 MeV-H+

• 2. Introduction of Ion Beam

Facilities in Japan(TIARA/DuET/HIT)

 Triple Ion Irradiation Facility of JAEA (QST at present)

• 2. Introduction of Ion Beam

Facilities in Japan(TIARA/DuET/HIT)

 DuET Facility of Kyoto Univ.

Two beam lines such as Fe ion beam and He ion beam

• 2. Introduction of Ion Beam

Facilities in Japan(TIARA/DuET/HIT)

 HIT Facility of Univ. of Tokyo (Tokai‐mura, Ibaraki)

• 3. Some Results

11 Au thin plate 約10nm

TEM Specimen prepared by Focused Ion Beam

• 3. Some Results

(a) (b) (c)

Dual beams

(10 appm-He/dpa)

Triple beams

(10 appm-He/dpa, 40 appm-H/dpa)

Triple beams

(100 appm-He/dpa, 500 appmH/dpa)

50 nm

0.08% 3.2% 1.2%

Cavities formed in F82H irradiated at 470oC to 50dpa at the depth of around 1 m.

Swelling of F82H under Dual or Triple Ion Irradiation (10.5 MeV Fe2+, 1.05 MeV-He+, 0.38 MeV-H+)

• E. Wakai, et al., “Effect of triple ion beams in ferritic/martensitic steel on swelling behavior”, Journal of Nuclear

Materials 307‐311 (2002), pp.278‐282.

• 3. Some Results
• E. Wakai, et al., “Effect of triple ion beams in ferritic/martensitic steel on swelling behavior”, Journal of Nuclear Materials 307‐311 (2002),

pp.278‐282.

Spallation (triple) Fusion (triple) Fusion (dual) 470oC 600oC

100nm 200nm 200nm 200nm 200nm 200nm

50 dpa

Density of dislocation (m-2) 1.0E+13 1.0E+14 1.0E+15 470o C 600o C Irradiation Temperature(oC) Triple (Spallation Triple (Fusion) Dual (Fusion) Pre-irradiation level 101

4

101

5

101

3

Dislocation of F82H under Dual or Triple Ion Irradiation

• 3. Some Results

0.01 0.1 1 10 400 500 600

Triple ion beams Spallation condition (He/dpa, H/dpa)

Swelling Swelling (%) (%) Irradiation Irradiation Temperature emperature（℃）

Triple ion beam Fusion condition (He/dpa, H/dpa)

Dual ion beams （He/dpa)

Material: F82H steel

(Fe‐8Cr‐2W‐0.1C‐0.04Ta ferritc/martenstic steel) for fusion structure material,

50 dpa TIARA Triple Ion Beam Experiment

H measurement in nuclear resonance method (from 15N(H, )12C )

H Implanted depth

H Concentration (at%) gannma‐ray Counts (arb. Unit) Depth from surface

16

F82H-std +50%CW(1) +90appm C +50%CW(2)

3.2% 1.4% 0.5%

50 nm

(c) (b’) (b)

(b’) (c) F82H-std +50%CW(1) +90appm C +50%CW(2)

3.2% 1.4% 0.5%

50 nm

(c) (b’) (b)

(b’) (c)

(a)

50nm

Swelling can be reduced by CW and carbon concentration

Swelling Reduction for F82H steel

17

Number Density of Cavity （×1021） Averaged Diameter of Cavity (nm)

He H He+H

5 Swelling (％) 12Cr 9Cr

He H He+H

100 12Cr 9Cr

He H He+H

2 12Cr 9Cr

He H He+H 9C r 12Cr 1 2 3 4 Number Density of Dislocation (x1013/m2)

Model Fe‐Cr Alloy: Swelling Behavior by Ion Irradiation (TIARA of JAEA)

Swelling depending

• n Temp., Dual &

Triple

By Tanaka

N.Sekimura et al. Journal of Nuclear Materials 283-287(2000)

Materials: V TIARA Multi‐ion beam experiment

Synergistic effect of He, H, and Dpa in V

変態線からの距離 (mm)

• 3
• 4
• 2
• 1

1 2

2.5 3.0 3.5 4.0 4.5 5.0

照射前硬さ 照射後硬さ

照射硬化 変態線 溶接金属側 母材側

微小押し込み硬さ (GPa)

Nano‐Indentation Measurement

TIG Welded F82H irradiated to 5 dpa at 300C in tiara Welded Metal Region Base Metal

Hardening Behavior, F82H, 100dpa, 360℃

2.0 4.0 6.0 8.0 10.0

25 50 75 100 125

Irradiation dose（dpa）

Micro-Hardness (GPa)

200 400 600 800 1000 1200

y (MPa)

neutron irradiation

(HFIR, 300 C)

Ion irradiation

(10.5MeV Fe, 360 C) Fe/He dual Fe single 750 C-tempered 800 C-tempered

• M. Ando (QST/JAEA)

He-appm/dpa 1 dpa 10 dpa Dislocation(No Cavity) Cavity Dislocation

1 10

HIT Ion Irradiation (SUS316) (N. Okubo)

Increment of hardness

HIT Ion Irradiation (SUS316) (N. Okubo)

S.-i. Kitazawa et al. Radiation Physics and Chemistry, 127(2016)264–268

SAW (Surface Acoustic Wave) Measurement Technique for detection of radiation hardening

SAW (Surface Acoustic Wave) Measurement Technique for detection of radiation hardening

SAW (Surface Acoustic Wave) Measurement Technique for detection of radiation hardening

4. SUMMARY

 As low energy ion beam facilities with multiple ion beams in Japan, TIARA of JAEA (QST), DuET of Kyoto Univ., and HIT of Univ.

• f Tokyo were shown.

 The merits of low energy multiple‐Ion beam experiment are given as below; (1) Higher dpa rate (about 5 dpa/h), (2) No radioactivity, (3) Relatively low cost operation, (4) He/dpa and H/dpa can be controlled for the purpose  The synergistic effect of He, H, dpa on swelling behavior were mainly shown in F82H, model alloy Fe‐Cr, and V.  Some analysis techniques were introduced such as SAW technique, nano indentation, H measurement in nuclear resonance method (from 15N(H, )12C ) for radiation damage.