RaDIATE: Graphite Status Report
Kavin Ammigan1, Nikolaos Simos2, Frederique Pellemoine3
1Fermi National Accelerator LaboratoryBatavia, IL 60510, USA
2Brookhaven National LaboratoryUpton, NY 11973, USA
3Michigan State University, FRIBEast Lansing, MI 48824, USA
RaDIATE Collaboration Meeting19 May 2014
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BNL BLIP irradiation experiment
+ Proton energy ∼ 180 MeV+ Irradiation performed in
tandem with isotopeproduction
+ 9 weeks of irradiation ofvarious graphite grade andC/C composite specimens
+ PIE at BLIP target processinglaboratory
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Irradiated graphite grades
Graphite grades
POCO
IG-430
SGL R7650
C2020
3D C/C composite
Irradiation parameters
Proton energy ∼ 180 MeV
σx ∼ 10 mm, σy ∼ 7 mm
Peak DPA ∼ 0.1
Peak temperature ∼ 200 ◦C
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Irradiated graphite grades
Graphite grades
POCO
IG-430
SGL R7650
C2020
3D C/C composite
Irradiation parameters
Proton energy ∼ 180 MeV
σx ∼ 10 mm, σy ∼ 7 mm
Peak DPA ∼ 0.1
Peak temperature ∼ 200 ◦C
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PIE equipment
Tensile tester and specimen fixture
3/4 point flexural test fixture
Ultrasonic system
Dilatometer and high temperature furnace
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PIE status and recent results
3 Tensile and thermal tests already performed on various graphitegrades1
3 Additional testing:
+ Mechanical (flexural) tests on 3D C/C specimens+ Electrical resistivity measurements to evaluate thermal
conductivity
1LBNE target material radiation damage from energetic protons of the Brookhaven Linear Isotope Production (BLIP) facility,http://www-radiate.fnal.gov/downloads.html
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Initial 3D C/C flexural test results
3 Un-irradiated specimens+ Consistent failure at the middle of the gage with 3 point
bending+ Flexural strength dependent on number of longitudinal fibers
along specimen gage
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3 Irradiated specimens+ Specimens irradiated in both water and argon environment+ 0.05 DPA+ ∼ 4 fibers along gage
Unirradiated Irradiated (water) Irradiated (argon)0
50
100
150
200
250
300
350
Fle
xura
l str
engt
h (M
Pa)
Flexural strength of 3D C/C composite
Unirradiated Irradiated (water) Irradiated (argon)0
5
10
15
20
25
30
35
40
45
50
Fle
xura
l Mod
ulus
(M
Pa)
Flexural Modulus of 3D C/C composite
+ More specimen tests to compare for DPA effects
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EDXRD experiment at NSLSObjective:
+ EDXRD studies of irradiated novel materials and compositesunder consideration in next generation fusion/fission reactorsand high-power accelerators
Irradiated array of materials relevant to LBNE and RaDIATE:+ Graphite: POCO, IG-430, SGL R7650+ Carbon composite: 3D C/C, 2D C/C+ Other: Ti-6Al-4V
Experiment performed:+ April 29 - May 6
Other potentially relevant materials:+ Gum metal, Super Invar, Tungsten
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EDXRD experimental stageMulti-functional stage capable of handling realsize irradiated specimens, under vacuum, fourpoint bending state of stress and eventuallyheating/annealing via a portable, collimated laserbeam
Experimental stage at X17B1 beamline at NSLS
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Preliminary results
Irradiated graphite (IG-430) Irradiated C/C composite
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Future tests
+ Further flexural tests on 3D C/C composite+ Thermal conductivity measurements
+ Next EDXRD experimental window (summer 2014)+ Monochromatic high energy X-rays+ Laser induced annealing of specimens
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Future plans
+ New irradiation runs to achieve higher DPA and gas production+ PIE of old/failed graphite targets 2, e.g. NuMI target fins
+ Challengeså Irradiation cost and timeå Irradiation facilities: BLIP, FETS?
2 Irradiated Materials Table, http://www-radiate.fnal.gov/downloads.html
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Future plans
+ New irradiation runs to achieve higher DPA and gas production+ PIE of old/failed graphite targets 2, e.g. NuMI target fins
+ Challengeså Irradiation cost and timeå Irradiation facilities: BLIP, FETS?
2 Irradiated Materials Table, http://www-radiate.fnal.gov/downloads.html
17 / 17RaDIATE: Graphite Status Report
Future plans
+ New irradiation runs to achieve higher DPA and gas production+ PIE of old/failed graphite targets 2, e.g. NuMI target fins
+ Challengeså Irradiation cost and timeå Irradiation facilities: BLIP, FETS?
2 Irradiated Materials Table, http://www-radiate.fnal.gov/downloads.html
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