Lifetime Measurement of HBC-foil and Nanocrystalline Diamond foil by Using KEK 650-keV High...
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![Page 1: Lifetime Measurement of HBC-foil and Nanocrystalline Diamond foil by Using KEK 650-keV High Intensity H - and DC ion Beam I.Sugai a, A.Takagi a,Y.Irie.](https://reader035.fdocuments.in/reader035/viewer/2022062801/56649e265503460f94b1568a/html5/thumbnails/1.jpg)
Lifetime Measurement of HBC-foil and Nanocrystalline Diamond foil by Using KEK 650-ke
V High Intensity H- and DC ion Beam
I.Sugaia, A.Takagia,Y.Iriea, Y.Takedaa, M.Oyaizuaa, H.Kawakamia, R.W.Shawb,M.A.Plumb,C.S.Feigerlec
a : KEK, b: SNS/ORNL, c: UT
Talks: 1. Requirement of HBC-foil 2. Preparation of the HBC-foil and the Nanocrystal diamond foil 3. Lifetime measurement by using KEK 650 keV H- and DC ion
beam 4. Summary and Conclusion
![Page 2: Lifetime Measurement of HBC-foil and Nanocrystalline Diamond foil by Using KEK 650-keV High Intensity H - and DC ion Beam I.Sugai a, A.Takagi a,Y.Irie.](https://reader035.fdocuments.in/reader035/viewer/2022062801/56649e265503460f94b1568a/html5/thumbnails/2.jpg)
Schematic layout of the Accelerator Complex of J-PARC and Stripper Foil Position
![Page 3: Lifetime Measurement of HBC-foil and Nanocrystalline Diamond foil by Using KEK 650-keV High Intensity H - and DC ion Beam I.Sugai a, A.Takagi a,Y.Irie.](https://reader035.fdocuments.in/reader035/viewer/2022062801/56649e265503460f94b1568a/html5/thumbnails/3.jpg)
Injection Beam and Stripper Foil Properties of 3GeV ring at J-PARC
Kinetic energy 200 MeV (first stage) 400 MeV (second stage) Beam pulse length 0.5 ms Repetition rate 25HzAverage beam current 0.333mA Beam Size 10 mm x 10 mm Foil thickness 300- 500 g/cm2
Foil peak temperature >1800K(If average foil hitting number of bunched proton is >17 and
Circulating bunched beam is 8.3x 1013/bunch )
![Page 4: Lifetime Measurement of HBC-foil and Nanocrystalline Diamond foil by Using KEK 650-keV High Intensity H - and DC ion Beam I.Sugai a, A.Takagi a,Y.Irie.](https://reader035.fdocuments.in/reader035/viewer/2022062801/56649e265503460f94b1568a/html5/thumbnails/4.jpg)
Road to the HBC-foil
• Limits of Cluster Foils;• The max.accessible foil thickness:140±30 g/cm2
• Thickness reduction of original thickness:-3/4 or-75% • And pin-holes were observed
• In order to overcome these problems
• We have tried to mix the graphite rod with foreign atoms like Be, B, Al, Si, etc.• Among these, the boron-mixed foils showed especially good results.
Stripper foils made by this method, which We call Hybrid Boron mixed Carbon stripper foil
(HBC-foil)
![Page 5: Lifetime Measurement of HBC-foil and Nanocrystalline Diamond foil by Using KEK 650-keV High Intensity H - and DC ion Beam I.Sugai a, A.Takagi a,Y.Irie.](https://reader035.fdocuments.in/reader035/viewer/2022062801/56649e265503460f94b1568a/html5/thumbnails/5.jpg)
SLIT
To TMP 650keVH- BeamH+ Beam
Faraday Cup
RadiationThermometer
VIDEOCamera
Transfer rod
Al Target Folder
Carbon Foils
View Port
View Port
Experimental apparatus for lifetime measurement of various carbon stripper foils for 650-keV at KEK
ICFA2008
![Page 6: Lifetime Measurement of HBC-foil and Nanocrystalline Diamond foil by Using KEK 650-keV High Intensity H - and DC ion Beam I.Sugai a, A.Takagi a,Y.Irie.](https://reader035.fdocuments.in/reader035/viewer/2022062801/56649e265503460f94b1568a/html5/thumbnails/6.jpg)
![Page 7: Lifetime Measurement of HBC-foil and Nanocrystalline Diamond foil by Using KEK 650-keV High Intensity H - and DC ion Beam I.Sugai a, A.Takagi a,Y.Irie.](https://reader035.fdocuments.in/reader035/viewer/2022062801/56649e265503460f94b1568a/html5/thumbnails/7.jpg)
Pictures of Various Foils Tested by using 650 keVH- and DC Ion Beam of 3.5 mmbeam spotSingle HBC-foil Sandwiched SiC fibers10-4 (HBC: 390g/cm2)
Before beam irradiation Under irradiation (107h) Survived (256.5h)Double-Layered HBC-foil Sandwiched SiC fibers10-3 (HBC: 205x2=410g/cm2)
Before beam irradiation Under irradiation (104h) Survived (203.5h)
![Page 8: Lifetime Measurement of HBC-foil and Nanocrystalline Diamond foil by Using KEK 650-keV High Intensity H - and DC ion Beam I.Sugai a, A.Takagi a,Y.Irie.](https://reader035.fdocuments.in/reader035/viewer/2022062801/56649e265503460f94b1568a/html5/thumbnails/8.jpg)
Microcrystalline Diamond Sandwiched SiC fibers f or SNS3-2 (SNS #510: 383g/cm2)
Before irradiation Under irradiation (6h) back bending (11h)
Irradiation after 3min Under irradiation (5.0h) back bending (14h)
![Page 9: Lifetime Measurement of HBC-foil and Nanocrystalline Diamond foil by Using KEK 650-keV High Intensity H - and DC ion Beam I.Sugai a, A.Takagi a,Y.Irie.](https://reader035.fdocuments.in/reader035/viewer/2022062801/56649e265503460f94b1568a/html5/thumbnails/9.jpg)
Nanocrystalline Diamond without SiC fibers4-2 (SNS #527: 433g/cm2)
Before irradiation Under irradiation (10.5h) Inside curing (10.5h)
Inside curing ( 21h) Inside curing ( 21h)
![Page 10: Lifetime Measurement of HBC-foil and Nanocrystalline Diamond foil by Using KEK 650-keV High Intensity H - and DC ion Beam I.Sugai a, A.Takagi a,Y.Irie.](https://reader035.fdocuments.in/reader035/viewer/2022062801/56649e265503460f94b1568a/html5/thumbnails/10.jpg)
Nanocrystalline Diamond with Si frame11-1 (SNS #730: 541g/cm2) 2008/07/17~7/20
Before irradiation Under irradiation (29h) Surface (62h)
Surface (62h) Surface (62h)
![Page 11: Lifetime Measurement of HBC-foil and Nanocrystalline Diamond foil by Using KEK 650-keV High Intensity H - and DC ion Beam I.Sugai a, A.Takagi a,Y.Irie.](https://reader035.fdocuments.in/reader035/viewer/2022062801/56649e265503460f94b1568a/html5/thumbnails/11.jpg)
Multi-layered DLC for TRIUMF8-5 (TRIUMF Multi-layered DLC: 2.3m/ 480g/cm2)
Before irradiation Under irradiation (0.5h) Broken (1h)
Surface image in dark
![Page 12: Lifetime Measurement of HBC-foil and Nanocrystalline Diamond foil by Using KEK 650-keV High Intensity H - and DC ion Beam I.Sugai a, A.Takagi a,Y.Irie.](https://reader035.fdocuments.in/reader035/viewer/2022062801/56649e265503460f94b1568a/html5/thumbnails/12.jpg)
Carbon nano-tube for AIST7-3 (CNT Sheet: 3~4m/ 300~400g/cm2)
Before irradiation Under irradiation (5h) Broken by a hole (9h)
![Page 13: Lifetime Measurement of HBC-foil and Nanocrystalline Diamond foil by Using KEK 650-keV High Intensity H - and DC ion Beam I.Sugai a, A.Takagi a,Y.Irie.](https://reader035.fdocuments.in/reader035/viewer/2022062801/56649e265503460f94b1568a/html5/thumbnails/13.jpg)
CM-foil for ACF (Arizona)10-1 (CM: 425g/cm2) 2008/05/20,
Before irradiation Under irradiation (0.5h) Broken (1.5 h)
![Page 14: Lifetime Measurement of HBC-foil and Nanocrystalline Diamond foil by Using KEK 650-keV High Intensity H - and DC ion Beam I.Sugai a, A.Takagi a,Y.Irie.](https://reader035.fdocuments.in/reader035/viewer/2022062801/56649e265503460f94b1568a/html5/thumbnails/14.jpg)
Microcrystal Diamond foil with Si frame (Kobelco)11-2 (Diamond: 540g/cm2)
Before irradiation Under irradiation (31.5h) Broken (62h)
![Page 15: Lifetime Measurement of HBC-foil and Nanocrystalline Diamond foil by Using KEK 650-keV High Intensity H - and DC ion Beam I.Sugai a, A.Takagi a,Y.Irie.](https://reader035.fdocuments.in/reader035/viewer/2022062801/56649e265503460f94b1568a/html5/thumbnails/15.jpg)
0
200
400
600
800
1000
0 5 10 15 20 25Relative distance (mm)
Thi
ckne
ss (g
/cm
2 ) HBC-Foil: 417g/cm2Region
Iradiated by 650 keV H- ions
3mm~
0
200
400
600
800
1000
0 5 10 15 20 25
Relative distance (mm)
Thi
ckne
ss (g
/cm
2 ) HBC-Foil: 210g/cm2x2
3mm~
Region
Iradiated by 650 keV H- ions
The reduction in thickness of the HBC-foil ICFA2008
![Page 16: Lifetime Measurement of HBC-foil and Nanocrystalline Diamond foil by Using KEK 650-keV High Intensity H - and DC ion Beam I.Sugai a, A.Takagi a,Y.Irie.](https://reader035.fdocuments.in/reader035/viewer/2022062801/56649e265503460f94b1568a/html5/thumbnails/16.jpg)
-30
-20
-10
0
10
20
30
0 2 4 6 8 10 12(% in
g/
cm2 )
Measurerment DirectionHBC-Foil (385g/cm2)
12.5cm
7.5c
m
-30
-20
-10
0
10
20
30
0 2 4 6 8 10 12
Thi
ckne
ss d
evia
tion
Relative distance (cm)
Measurerment Direction
12.5cm
7.5c
m
The thickness uniformity of the HBC-foil ICFA2008
Center
Center
![Page 17: Lifetime Measurement of HBC-foil and Nanocrystalline Diamond foil by Using KEK 650-keV High Intensity H - and DC ion Beam I.Sugai a, A.Takagi a,Y.Irie.](https://reader035.fdocuments.in/reader035/viewer/2022062801/56649e265503460f94b1568a/html5/thumbnails/17.jpg)
Table-1 Lifetime of various foils
Type of foil Lifetime (h)
Initial thickness(g/cm2)
Thickness Reduction ( % )
Foil conditions Beam Current (A)
FoilTemperature (K)
Uncertainty ±10 ±10 ±100
Single HBC sandwiched by SiC fibers (KEK)
256.5survival
417 30.0 No deformation, but pin-holes
90 1970
Double Layered HBC sandwiched by SiC fibers (KEK)
203.5survival
210 x 2 26.0 Small shrinkage and No pin-holes
90 1950
Microcrystalline Diamond sandwiched by SiC fibers (SNS)
10.5 349 3.0 Back bending and No pin-holes
110 1930
Nanocrystalline Diamond without SiC fibers (SNS)
21.0 439 6.5 Back bending and pin-holes 130 1950
Nanocrystalline Diamond with Si frame (SNS)
62.0 541 2.1 Crack inside frame and No pin-hole
90 2100
Multi-DLC (TRIUMF) 1.0 480 Non-measurable due to a big hole
Broken 110 2260
Carbon nano-tube ( AIST) 9.0 450 Non-measurable due to a big hole
Broken 90 1880
CM (Arizona) with SiC 1.5 425 Non-measurable due to a big hole
Broken 90 1920
Microcrystalline Diamond with Si frame (Kobelco)
61.5 540 5.7 Crack inside frame and Big a hole
90 2080 Lifetime of the foils was measured with a 650 keV H- and DC ion beam and 3.5 ±1.0 mm of beam spot
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Raman Spectra of DM,CM and HBC-foils
• The DM-foils are irradiated by ion beam and laser. The CM (amorphous)-foil is irradiated by only ion beam. In all irradiated foils, we can clearly see broad peaks at around 1580 and 1350 cm-1.
• The DM-foil irradiated by ion beam shows small peak at 1332cm-1, in contrast by laser irradiation.
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
1100 1200 1300 1400 1500 1600 1700
Raman Shift [cm-1]Raman sp1-LN.fig
Diamond (Non-irrad.)
Diamond (irrad. by ion beam)
HBC (Non-irrad.)
Amorphous C (Irrad. by ion beam)
Diamond (irrad. by laser)
2006/5/16
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Element analysis of thin HBC-foil
• The spectrum was obtained by RBS with a 2 MeV He+ ion, clearly showing the 10B and 11B nuclide peaks and several contamination. The both thickness corresponds to approximately 24 % of the carbon foil thickness.
0
500
1000
1500
2000
2500
3000
0 200 400 600 800 1000
CO
UN
TS
CHANNEL
10B
11B
12C
13C
16O28Si
133Cs
10B
11B
12C
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Specific gravity and resistivity of cluster foilin comparison with other forms of carbon.
Sample Specific gravity Resistivity
(g/cm3) (cm)
Single crystal of graphite 2.26 10-4parpendicular to c-axis
Fine grain graphite 1.75-1.9 ~1 parallel to c-axis
1.5-1.8x10-3
Diamond 3.5 >1016
Cluster foil 1.85± 0.20 0.080± 0.005
CM foil 1.94± 0.19 0.015± 0.002
HBC-foil 1.20± 0.30
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Summary and Conclusion
1. We have measured the lifetime of various foils made by several methods by using KEK 650keV H- and DC ion beam
2. Among these, the lifetime of the HBC-foils showed 256 h for single and 203.5 h for double layered HBC-foils, which correspond to about 170 and 135 times longer than that of the best CM foil. However, for the single HBC-foil we observed small pin-holes at the irradiated area and it’s peripheries even at the 1900 ±100K for 256 h long time irradiation.
3. Nano and microcrystalline diamond foils showed rather back bending at the high temperature of 2000±100K, but lasted longer than 20h.
4. Further R & D should be needed especially to reduce the pin-hole production for the HBC-foils at 2000K.
ICFA2008