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MUSICC3D: A 3D CODE FOR MODELING MULTIPACTING
Wednesday, October 3, 2013
Unité mixte de recherche
CNRS-IN2P3Université Paris-Sud
91406 Orsay cedexTél. : +33 1 69 15 73 40Fax : +33 1 69 15 64 70http://ipnweb.in2p3.fr
Hamelin Thibault
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OUTLINE
1. Introduction of Multipacting
2. MUSICC3D software
Principle of calculation with MUSICC3D
Outputs of MUSICC3D
3. Simulation of Spiral 2 cavities
4. Simulation of Spoke cavities for ESS project
5. Conclusions and perspectives
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PRINCIPLE OF MULTIPACTING
Secondary Emission Yield (SEY)Cycle conditions
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REPRESENTATION OF MULTIPACTING
Multipacting’s susceptibility zones calculated for copper
(colours represents the SEY)
Parallel plate
Frequency gap
Elec
tric
pea
k fie
ld
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REPRESENTATION OF MULTIPACTING
Frequency gap
Elec
tric
pea
k fie
ld
Multipacting’s susceptibility zones calculated for copper
(colours represents the SEY)
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REPRESENTATION OF MULTIPACTING
Frequency gap
Elec
tric
pea
k fie
ld
Multipacting’s susceptibility zones calculated for copper
(colours represents the SEY)
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REPRESENTATION OF MULTIPACTING
Frequency gap
Elec
tric
pea
k fie
ld
Multipacting’s susceptibility zones calculated for copper
(colours represents the SEY)
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Structures have complex 3D geometries
Need to use 3D software for Multipacting
3D ASPECT
HF cavities for particle acceleratorHF amplifier
Microwave circuits on satellites
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OUTLINE
1. Introduction of Multipacting
2. MUSICC3D software
Principle of calculation with MUSICC3D
Outputs of MUSICC3D
3. Simulation of Spiral 2 cavities
4. Simulation of Spoke cavities for ESS project
5. Conclusions and perspectives
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PRINCIPLE OF CALCULATION WITH MUSICC3D
Developed at IPNO
Any 3D geometries (one or more materials)
3D tetrahedral meshing HF field imported from an external field solver
Based on the Runge Kutta method and solve trajectories of electrons with the relativistic equation of motion
Model of virtual charge
The integrations over the multi differential SEY (Ein, ain, Eout, aout) is done with the Montecarlo method.
Visualisation of electron’s trajectory (MUSICC3D)
max
0
nb
SEYQ
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OUTPUTS OF MUSICC3D
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OUTLINE
1. Introduction of Multipacting
2. MUSICC3D software
Principle of calculation with MUSICC3D
Outputs of MUSICC3D
3. Simulation of Spiral 2 cavities
4. Simulation of Spoke cavities for ESS project
5. Conclusions and perspectives
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SIMULATION OF SPIRAL 2 CAVITY
(E = 4.78*Eacc)
Cavity (l/4) in testing at IPNO for the new particle accelerator in GANIL (f = 88 MHz)
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SIMULATION OF SPIRAL 2 CAVITY
(E = 4.78*Eacc)
Cavity (l/4) in testing at IPNO for the new particle accelerator in GANIL (f = 88 MHz)
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SIMULATION OF SPIRAL 2 CAVITY
(E = 4.78*Eacc)
Cavity (l/4) in testing at IPNO for the new particle accelerator in GANIL (f = 88 MHz)
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In red : MUSICC3D simulations In blue : experimental measures
SIMULATION OF SPIRAL 2 CAVITY
Cavity (l/4) in testing at IPNO for the new particle accelerator in GANIL (f = 88 MHz)
(E = 4.78*Eacc)
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OUTLINE
1. Introduction of Multipacting
2. MUSICC3D software
Principle of calculation with MUSICC3D
Outputs of MUSICC3D
3. Simulation of Spiral 2 cavities
4. Simulation of Spoke cavities for ESS project
5. Conclusions and perspectives
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SIMULATION OF SPOKE CAVITY FOR ESS PROJECT
IPNO is in charge of the design of new Spoke cavities for the ESS project(f = 352 MHz)
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SIMULATION OF SPOKE CAVITY FOR ESS PROJECT
(E = 4.84*Eacc)
IPNO is in charge of the design of new Spoke cavities for the ESS project(f = 352 MHz)
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SIMULATION OF SPOKE CAVITY FOR ESS PROJECT
(E = 4.84*Eacc)
IPNO is in charge of the design of new Spoke cavities for the ESS project(f = 352 MHz)
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SIMULATION OF SPOKE CAVITY FOR ESS PROJECT
IPNO is in charge of the design of new Spoke cavities for the ESS project(f = 352 MHz)
(E = 4.84*Eacc)
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SIMULATION OF SPOKE CAVITY FOR ESS PROJECT
IPNO is in charge of the design of new Spoke cavities for the ESS project(f = 352 MHz)
(E = 4.84*Eacc)
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OUTLINE
1. Introduction of Multipacting
2. MUSICC3D software
Principle of calculation with MUSICC3D
Outputs of MUSICC3D
3. Simulation of Spiral 2 cavities
4. Simulation of Spoke cavities for ESS project
5. Conclusions and perspectives
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CONCLUSIONS AND PERSPECTIVES
Conclusions Prediction Multipacting zones
Electric peak field Location
Multiple output 2D or 3D trajectories Charges Phases Number of collision Collision energy
Perspectives
Conception and fabrication of the demonstrator allows the study of Multipacting
Characterisation of the varied SEY materials Multipacting study according to the different states of the matter’s surfaces
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Thank you for your attention
