New Configuration and Results with the LPSC Charge Breeder
Experimental setupLight and heavy ions charge breeding
Booster ‘improvements’14 GHz results with the new configuration
18 GHz resultsPreliminary 14+18 GHz frequency mixing
Thierry Lamy, Julien Angot, Christian Fourel, Thomas Thuillier
Laboratoire de Physique Subatomique et de CosmologieCNRS-IN2P3/UJF/INP Grenoble
Experimental setup (1)New Configuration and Results with the LPSC Charge Breeder
H-V Emittancemeters
Allison type 1+ and n+ Emittancemeters
Example natural Kr1+ isotopesDelivered by the 2.45 GHz Monobob source
(GANIL-SPIRAL2)
New Configuration and Results with the LPSC Charge BreederExperimental setup (2)
New Configuration and Results with the LPSC Charge BreederExperimental setup (3)
New Configuration and Results with the LPSC Charge BreederExperimental setup (4)
1+ BeamFrom TIS
n+ Beamto acceleration
Well known ECRtechnologysimplicityCw or pulsedoperation
SIMION 3D Calculations
ECR Plasma capture andIonization
DecelerationOpticaladaptation
New Configuration and Results with the LPSC Charge BreederExperimental setup (5)
0,0
0,1
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0,9
1,0
-60 -50 -40 -30 -20 -10 0 10 20 30
DV (volts)
Capturevs DV
Ar8+ Rb15+ Zn11+ Sn22+
The potential difference between the 1+ and the n+ sources permit the capture
New Configuration and Results with the LPSC Charge BreederLight and heavy ions charge breeding (1)
Thermoionization source
1+ beam line
17O3+, 34S6+, 68Zn12+,85Rb15+…17O3+, 34S6+, 68Zn12+…
85Rb15+ (+ O2 gas) 3.6 % 70 ms, (We had before, 5 %, 225 ms)
The tuning of the boostermay depend on the isotopehalf life
74Rb 64.9 ms82Rb 1.273 m
Rb1+ spectrumRubidium
87Rb1+85Rb1+
85Rb1+ X emittance
85Rb15+ X emittance
New Configuration and Results with the LPSC Charge BreederLight and heavy ions charge breeding (2)
10 eV
Na+
NaO+
Y
Y’
New Configuration and Results with the LPSC Charge BreederLight and heavy ions charge breeding (3)
Sodium beam
23Na6+ (+ He gas) 1.9 % 50 ms
14 GHz
200 W
300 W
400 W
500 W
600 W
New Configuration and Results with the LPSC Charge Breeder
V curves versus RF Power
Light and heavy ions charge breeding (4)
Na3+
Na6+
Na7+
Na8+
New Configuration and Results with the LPSC Charge BreederLight and heavy ions charge breeding (5)
Magnetic nose
Booster ‘improvements’New Configuration and Results with the LPSC Charge Breeder
EvacuationAdmission
New double frequency plasma chamberCooling between inner and outer cylinderIR camera: FLIR Thermacam E45
Plasma chamber fully cooled down in 25 ms
Cooling tests of the double frequency plasma chamber
New Configuration and Results with the LPSC Charge Breeder
Booster Body(grounded)
Central insulator, e = 3mm(2 parts) 60 kV: OK
1
2Extraction side
Insertion central insulator 1 Insertion central insulator 1Recouvrement (1et 2): 100 mm
After 10 yearsRemember: central core of the Booster (HT)To be inserted into the insulator
New Configuration and Results with the LPSC Charge BreederBooster ‘improvements’
New Configuration and Results with the LPSC Charge BreederBooster ‘improvements’
A slight demagnetization at theinjection 8 kG on the poles (nominal)
Champ magnétique radial sur les pôles de l'hexapôle du booster
0
1
23
45
6
78
9
0 5 10 15 20 25 30 35Injection Z (cm) Extraction
B(k
G) Pôle 1 0° (-)
Pôle 2 60° (+)Pôle 3 120° (-)
Pôle 4 180° (+)Pôle 5 240° (-)
Pôle 6 300° (+)
Hexapole insertionInto the centralinsulator
Plasma chamber insertionInto the hexapole
Hexapole magnetization check
Booster ‘improvements’New Configuration and Results with the LPSC Charge Breeder
Magnetic plug injection insertion
Booster ready to land !
Efficient and fast worker(Julien not contaminated)6 screws to tighten
Magnetic plug extraction insertion6 screws to tighten
Montage alumine extractionVue nez extraction Montage butée Permaglass
Vue support tube ralentisseurFixation alumine injection Fixation alumine extraction
Booster ‘improvements’New Configuration and Results with the LPSC Charge Breeder
New Configuration and Results with the LPSC Charge BreederPreliminary results
Booster opened many times (high drain current on power supply)
@14 GHz the Eff. Yield 85Rb13+after the modifications 2%
12 V
@ 18 GHz08/31/08
After 1 weekdrying
@18 GHz: Eff. Yield 85Rb13+ 1% (after 1 hour)
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1
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100 200 300 400 500 600 700
Puissance (W)
Ren
dem
ent
pou
rR
b13
+(%
)
14GHz18GHz50% 14GHz + 50% 18GHz25% 14GHz + 75% 18GHz10% 14GHz + 90% 18GHz
New Configuration and Results with the LPSC Charge Breeder
Initial conditions
1.3 % at best after 3 hours experiment‘slight’ effect of frequency mixingAt least no drama…!
CH1
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1
-0.10 -0.05 0.00 0.05 0.10 0.15 0.20 0.25 0.30
12 eV
93 ms
Preliminary results
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