Pyroelectric portable accelerator
Pyroelectric portable accelerator
Jun Kawai
Kyoto University
Outline
Handy XRF
Pyroelectric XRF & XAFS
Discharge X-ray tube
Pyroelectric nuclear fusion
Acknowledgements
S. Kunimura
Asahi Glass Found.
BCR680 plastic standard
Pyroelectric X-Ray tube COOL-X
XRF with Pyroelectric
X-Ray Generator
Ida & Kawai
JAAS 2004
0.1 ppm
300 mW
Pyroelectric crystal 9V electric dry battery
Aluminum foil
100
(Ca)
Ba
50
60
Ba
40
(Zr)
(Ca)
(Cu)
Cr
Ba
Intensity/counts
Intensity/counts
80
Intensity/counts
80
60
Cl
40
30
Ba
(Cu)
Ba Cr
20
Cd
2
20
4
6
8
10
Pb
Pb
12
2
4
6
10
12
2
14
4
6
8
10
12
14
Energy/keV
60
(Ca)
(Ca)
(Ca)
60
40
Cr
60
Intensity/counts
Intensity/counts
50
80
40
20
Ba
(Ar)
Pb
40
30
20
Ba
(Cu)
Cr
(Zr)
(Cu)
(Zr)
(Ar)
0
Energy/keV
80
120
8
Fe
Se
Pb
0
14
(Cu)
(Zr)
10
Hg
Energy/keV
Intensity/counts
Fe
Hg
Pb
20
(Ca)
(Zr)
0
100
Ba
40
Cd
(Fe)
20
60
(Zr)
10
Ba
(Cu)
(Fe)
(Ar)
Ba
Pb
0
0
2
4
6
8
Energy/keV
10
12
14
2
4
6
8
Energy/keV
10
12
14
0
2
4
6
8
10
12
Energy/keV
Pyroelectric XRF spectra of the
cinnabar seal inks (朱肉)
14
X-Ray Spectrometry
Intensity (counts)
Ta L
X-ray Absorption Intensity (arb. units)
Cu K
Ta L
800
600
Compton
Scattering
400
I0
200
Ca K x-ray
fluorescence
I (t=200 m)
I (t=400 m)
0
2000
2000
4000
6000
8000
10000
Energy (eV)
Sample
X-ray
Generator
X-ray
Si PIN
Detector

25 mm
150 mm
Appl.Phys. Lett.
Grazing Incidence (=30 deg.)
400 m
Grazing Incidence
(=30 deg.)
200 m
Normal Incidence
200 m
Ca absorption
coefficients
4000
6000
Energy (eV)
8000
10000
Terasawa type X-ray tube
Ni
Cu
W
Conclusions
• Many portable XRF: ppm sensitivity
• Pyroelectric+preconcentration: 0.1 ppm
• Pyroelectric XAFS (SR will be of no use
in the future)
• Pyroelectric nuclear fusion….?
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小型X線管を用いた高感度全反射蛍光X線分析装置の開発