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Use of Microbeam Use of Microbeam at JAEA Takasaki at JAEA Takasaki Mitsuhiro FUKUDA Research Center for Nuclear Physics(RCNP) Osaka University APAC2007 THZH102

APAC2007 THZH102 Use of Microbeam at JAEA Takasaki

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Microsoft PowerPoint - THZH102_talkUse of MicrobeamUse of Microbeam at JAEA Takasaki at JAEA Takasaki
Mitsuhiro FUKUDA Research Center for Nuclear Physics(RCNP)
Osaka University
APAC2007 THZH102
Tomihiro Kamiya, Masakazu Oikawa, Takahiro Satoh, Takuro Sakai, Satoshi Kurashima, Nobumasa Miyawaki, Susumu Okumura, Hirotsugu Kashiwagi, Watalu Yokota
Research Center for Nuclear Physics (RCNP) Osaka University
Mitsuhiro Fukuda, Kichiji Hatanaka, Tetsuhiko Yorita
ContentsContents 1. Microbeam Production Systems
at TIARA Facility
3. Development of a New High-Energy Heavy Ion Microbeam System
4. Generation of High Quality Beams by Upgrading Cyclotrons
5. Summary
1. Microbeam Production Systems at 1. Microbeam Production Systems at TIARATIARA FacilityFacility
K110 Cyclotron
En er
gy (M
Primary beam
Quadrupole lenses
Focal plane
Microbeam line
Heavy Ion Microbeam Line Light Ion Microbeam Line Several-dozen MeV Several MeV
Spot Size of Light Ion Microbeam Spot Size of Light Ion Microbeam
μm
0 0.4 0.8 1.2 Horizontal Position (μm)
In te
ns ity
Scanning the microbeam
2 dimensional distribution of elements in cattle blood vessel cell
20μm x 20μm
In-air Micro-PIXE Analysis Using 2 MeV Proton Microbeam
Application of several-hundred-MeV heavy ion Microbeam
Beam spot size : 510 μm
Single-ion hit rate : several hits/min
Collimator
Cell
Beam
Cell nucleus
• Analysis of cellular spatial sensitivity, interaction of damages, dynamics of cellular repair and intra-cellular process like apoptosis
Hit position
Collimation of Beam
3. Development of a New High3. Development of a New High--EnergyEnergy Heavy Ion Microbeam SystemHeavy Ion Microbeam System
Micro Slits
27 90
m m
Ion Beam Optics
(achieved)
less than 1μm
applied to
(under development)
4. Generation of High Quality Beams4. Generation of High Quality Beams by Upgrading Cyclotronsby Upgrading Cyclotrons
TIARA Cyclotron Facility
RCNP Cyclotron Facility
Flattop CavityBeam
-1.5
-1
-0.5
0
0.5
1
1.5
R el
at iv
e A
m pl
itu de
Phase (degrees)
0. 00
0. 05
0. 10
0. 15
0. 20
0. 25
0. 30
Be am
C ur
re nt
Ordinary Acceleration
1
1 0 4
9 0 0 1 0 0 0 1 1 0 0 1 2 0 0 1 3 0 0 1 4 0 0


1 5 c h / 1 R F Time
0
20
40
60
80
100
ON


Probe Position (mm)
1 0 4
1 0 5
9 0 0 1 0 0 0 1 1 0 0 1 2 0 0 1 3 0 0 1 4 0 0


1 5 c h / 1 R F Time
260 MeV 20Ne7+
@ JAEA AVF Cyclotron
Temperature increase caused by heat from coils : Δtyoke ~5 oC
Magnetic field stability : ΔB/B ~ 3×10-4
- Insertion of water cooled plate for heat shielding
Δtyoke ~ 0.1 oC - Stabilization of cooling water
temperature for coils Δtcoolant ~ 0.5 oC
ΔB/B ~ 1×10-5
¼ cut
Cyclotron magnet
Water-cooled plate
Trim coil
Yoke Pole
Main coil
High Quality Beam at RCNP Cyclotron FacilityHigh Quality Beam at RCNP Cyclotron Facility Ring Cyclotron
K=400 MeV ΔE/E ~ 0.01% Since 1992
Stability of Magnetic Field
ΔB/B < 0.001% Grand Raiden
Energy Resolution ΔE/E ~ 0.005%
Upgraded recently
Ultrahigh Energy Resolution Experiment Using the Ultrahigh Energy Resolution Experiment Using the High Quality BeamHigh Quality Beam
Lateral and Angular dispersion matching between WS-beam line and Grand RAIDEN
Ultrahigh resolution of ΔE = 12.8 keV
World record !!
Ultrahigh resolution (3He,t) measurement
5 ~ 10 μm (Collimation)
H ~ Xe>10-3 (original)
<1 μmH ~ Au10-4Heavy ion
10-5Light ion
ApplicationsSpot sizeIonΔE/EMicrobeam