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PRISM-FFAG
PRISM Working Group
004
• ┞ ㌹• PRISM RF さ• PRISM RF System• PRISM RF AMP ••
004
┞ ㌹
Δp/p = ±20%time
Energy
Small ΔE
time
Energy
Large ΔE
Δp/p = ±3%
•RF Field ┞ ㌹
PRISM(=Phase Rotation Intense Slow Muon source):µ-e conversion
さ
004
60%
Time(µs)
68MeV/c
1. 2.5µs@68MeV/c1µs ┞ ㌹ 60%
2. Bucket Height(ΔEMAX) RF
ΔEMAX =
±20% ┘
PRISM-FFAG Ring•200kV/m@5MHz
•100Hz ㌹(Duty 0.1%)
PRISM RF さ (1)
004
さ RFProton Synchrotron RF System
0
10
20
30
40
50
60
0 2 4 6 8 10 12
Frequency (MHz)
Fie
ld G
radie
nt
(kV
/m)
SATUNE
MIMAS
CERN PSB
CERN PS
AGS
ISIS
KEK BSTR
KEK PS
JKJ!50GeV MR
JKJ!3GeV RCS
50GeV MR Upgrade
KEK-HGC
J-parc 50GeV MR
J-parc 3Gev RCS
004
RPISM RF さ (2)RF 5MHz, 250kV/m
Δp/p=±3%
±5ns Muon width at given momentum
Geant3 Simulation result by A.Sato
RF
phase(nsec) phase(nsec)
Δp/p=±8%
1 2 3
004
さ• (200kV/m)
さ
( MHz)┑
RpCL
ERF
HRF HRF
wRF=1/ L*C)
㊪
Duty0.1%•Core ス (air cooling)•┷
RF core さ
004
PRISM-FFAG RF
Air cooling (Duty 0.1%)Cooling1.7m × 1.0m (Inner 1m × 0.3m)Size of core33cmLength0.9kΩ/gapImpedance6 cores/gap# of cores5 gapsGaps/Cavity150-200kV/mField Gradient
4CW100,000E, DC33-37kV,1.5MW(peak for 10µs),Max Current 60A
Power Tube
004
RF Magnetic Cores
Magnetic Alloys
Ferrites
Requirements for PRISMB=V/ωS=10kV/(2π×5MHz×3.5cm×30cm)=300Gauss
µQf
004
MA Core for PRISM RF
1.7m1.7m
3.5cm
1m
004
PRISM MA Core (2)
148Ω
213Ω252Ω
004
PRISM RF System•
•5gaps•6 MA Cores/gap•33cm/gap
•8 ├•Duty 0.1%
33cm
7cm
µ-Beam3.5cm
004
PRISM RF AMP
㊪
㌹ C.G┷ 1.5kW
004
PRISM RF AMP R&D• 2003 RF System ″• PRISM AMP モ (
734Ω) Test RF System
Cavity
AMP
S.GPS
C.GPS
AnodePS
Include 10cores
M-Experimental Hall, RCNP,Osaka-Univ.
CavityPower Supply
AMP
004
PRISM RF AMP •43kV/gap 734Ω
•スゝ ┘(60A RF current)
86.6kVp-p
PRISM RF Cavity(0.9kΩ)予想される性能(テスト結果から推測)
55kV/gap
165kV/m
004
PRISM Cavity Design
APS
AMP
Cavity
By C. Ohmori, Y. Kuriyama
Beam Pipe
Side View
33cm
1 Gap モ PRISM 2004
APSBeam Pipe
AMP
Cavity
004
• PRISM RF System R&D• ″ MA Cores• モ
RF 5MHz 43kV
• ┘ PRISM RFCavity
2005 モ