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An example for Track3P multipacting computation on a single field level. Field gradient: 97e+06
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TotalTime: 20 //total running time in RF cycles, default: 20 RF cycle // If you don't give this block, it will use default value ParticlesTrajectories: // record particles' trajectory, only for running single //field case { ParticleFile: p // file name Skip: 10 // write file each 10 steps Start: 10 // start time step for writing file Stop: 100000 // stop time step for writing file } FieldScales: { Type: FieldGradient // Field level(V Three types, FieldGradient (v/m); / PortInputPortPower power(W) FieldScales: { ; StoreEnergy ScanToken: 0 // 1: scan, 0: no scan Scale: 97e+06 //field scale for particle trajectory } //Normalize field, only for closed waveguide case NormalizedField: { StartPoint: 0 0 0.0486225 //start point of the line for field integral calculation EndPoint: 0 0 0.2061 //end point of the line for field integral calculation } // Primary particles emission Emitter: { x0: -0.001 x1: 0.001 y0: 0.09 y1: 0.12 z0: -0.068 z1: 0.068 BoundaryID: 6 } // Boundary Material //Type Boundary type //1 / Reflector //2 / Absorber //3 / Secondary //4 / Primary //5 / SymmetryPlane Material:{ Type: Primary BoundarySurfaceID: 6 //Boundary surface ID } Material:{ Type: Secondary BoundarySurfaceID: 6 //Boundary surface ID } Material:{ Type: Absorber BoundarySurfaceID: 3 4 7 8 //Boundary surface ID } Material:{ Type: SymmetryPlane BoundarySurfaceID: 1 2 //Boundary surface ID } OutputImpacts: on // Field information container Domain: { PostprocessFile: ./vector1/postprocess.in Bins: 250 } Postprocess: // multipacting postprocess { Toggle: on // on: postprocess, off: no postprocess ResonantParticles: // postprocess for resonant particles { Token: on // on: analysis resonant particles, no: no analysis is done for resonant particles } } |
A complete example with impedance boundary condition
An example of multipacting simulation on a field level scan case
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// Field level(V/m) / Port power(W)
FieldScales:
{
Type: FieldGradient
ScanToken: 1 // 1: scan, 0: no scan
Minimum: 1e+06
Maximum: 100e+06
}
//Normalize field, only for closed waveguide case
NormalizedField:
{
StartPoint: 0 0 0.0486225 //start point of the line for field integral calculation
EndPoint: 0 0 0.2061 //end point of the line for field integral calculation
}
// Primary particles emission
Emitter:
{
x0: -0.001
x1: 0.001
y0: 0.09
y1: 0.12
z0: -0.068
z1: 0.068
BoundaryID: 6
}
Material:{
Type: Primary
BoundarySurfaceID: 6 //Boundary surface ID
}
Material:{
Type: Secondary
BoundarySurfaceID: 6 //Boundary surface ID
}
Material:{
Type: Absorber
BoundarySurfaceID: 3 4 7 8 //Boundary surface ID
}
Material:{
Type: SymmetryPlane
BoundarySurfaceID: 1 2 //Boundary surface ID
}
OutputImpacts: on
// Field information container
Domain:
{
PostprocessFile: ./vector1/postprocess.in
Bins: 360
}
Postprocess: // multipacting postprocess
{
Toggle: on // on: postprocess, off: no postprocess
ResonantParticles: // postprocess for resonant particles
{
Token: on // on: analysis resonant particles, no: no analysis is done for resonant particles
}
}
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An example of tracking particles simulation with only one impact information
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TotalTime: 3 //total running time in RF cycles, default: 20 RF cycle
// Field level(V/m) / Port power(W)
FieldScales:
{
Type: FieldGradient
ScanToken: 0 // 1: scan, 0: no scan
Scale: 97e+06 //field scale for particle trajectory
}
//Normalize field, only for closed waveguide case
NormalizedField:
{
StartPoint: 0 0 0.0486225 //start point of the line for field integral calculation
EndPoint: 0 0 0.2061 //end point of the line for field integral calculation
}
// Primary particles emission
Emitter:
{
t0: 0 //time(in RF cycle) for start emission
t1: 1 //time(in RF cycle) for end emission
Type: 4
Position: 4.0388e-4 4.63728e-3 6.49586e-2
BoundaryID: 6
}
Material:{
Type: Primary
BoundarySurfaceID: 6 //Boundary surface ID
}
Material:{
Type: Secondary
BoundarySurfaceID: 6 //Boundary surface ID
}
Material:{
Type: Absorber
BoundarySurfaceID: 3 4 7 8 //Boundary surface ID
}
Material:{
Type: SymmetryPlane
BoundarySurfaceID: 1 2 //Boundary surface ID
}
OutputImpacts: on
// Field information container
Domain:
{
dt: 0.5
PostprocessFile: ./vector1/postprocess.in
MaxImpacts: 1
Bins: 300
}
Postprocess: // multipacting postprocess
{
Toggle: on // on: postprocess, off: no postprocess
ResonantParticles: // postprocess for resonant particles
{
Token: off // on: analysis resonant particles, no: no analysis is done for resonant particles
InitialImpacts: 4 // particles with impacts number greater than initial impacts are considered, default is 4
EnergyRange: 10 10000 //particles with impact energy fall in this region is considered, default value: >10ev, <10000ev
}
DKSingleEmit:
{
Token: on
FileName: DKSingleEmit
SymmetryBoundaryIDs: 1 2
}
}
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An example for Track3P dark current simulation for 90 degree square bend structure
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TotalTime: 20
ParticlesTrajectories:
{ ParticleFile: p
Skip: 10
// Start: 500
// Stop: 2500
}
FieldScales:
{
Type: InputPortPower
ScanToken: 1 // 1: scan, 0: no scan
Minimum: 72e+06
Maximum: 72e+06
Interval: 1e+06
Scale: 213e+06 //field scale for particle trajectory
}
Emitter:
{
t0: 0
t1: 20.0
Type: 7 //dark current type (field emission)
BoundaryID: 6
N: 3 |
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ModelInfo: { File: cell.ncdf BoundaryCondition: { Magnetic: 1 3 4 Impedance: 6 Waveguide: 7 8 } SurfaceMaterial: { ReferenceNumber: 6 Sigma: 5.8e7 } } Port : { Reference number: 7 Origin: 0.0, 0.04105, 0.0 XDirection: 1.0, 0.0, 0.0 YDirection: 0.0, 0.0, -1.0 ESolver: { Type: Analytic Mode: { Waveguide type: Rectangular Mode type: TE, 1, 0 A: 0.028499 B: 0.00895 } } } Port : { Reference number: 8 Origin: 0.0, -0.04105, 0.0 XDirection: 1.0, 0.0, 0.0 YDirection: 0.0, 0.0, 1.0 ESolver: { Type: Analytic Mode: { Waveguide type: Rectangular Mode type: TE, 1, 0 A: 0.028499 // number of unit particles in the Bmacroparticle M: 0.00895 9.108e-31 // real mass of a unit }particle Q: -1.602e-19 d: .000001 WorkFunction: } } FiniteElement4.4 Beta: {120 OrderSuppressionFactor: 2.0 CurvedSurfaces//WriteToFile: on1 } FrequencyScan: { Start: 9.33e+9 End: 9.48e+9 Interval: 0.01e+9 } PostProcess: { Toggle: off Port Number: 0 //input port ModeFile: field } VerifyLinearSolver: yes LinearSolver: { Solver: MUMPS } |
Specify lossy materials
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ModelInfo: {
File: tapereda.ncdf
BoundaryCondition: {
Magnetic: 1
Electric: 2
Exterior: 6
Waveguide: 7
}
Material : {
Attribute: 1 //block 1 is vacuum
Epsilon: 1.0
Mu: 1.0
}
Material : {
Attribute: 2 //block 2 is lossy (cubit block)
Epsilon: 3.0
Mu: 1.0
EpsilonImag: -5.4 //lossy material
}
}
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...
// x y z directions limitation
x0: 0.0
x1: 0.025
y0: -0.1
y1: 0.2
z0: -0.2
z1: 0.1
}
OutputImpacts: on // write out impact energy infor.
Material:
{
Type: 3 //second partticle following SEY curve
BoundarySurfaceID: 6
// WriteToFile: 1
N: 100
M: 9.108e-31 // real mass of a unit particle
Model: 2
N: 3
Sigma0: 0.0 0.25 0.47 0.66 0.83 0.97 1.08 1.17 1.25 1.3 1.34 1.4 1.37 1.31 1.24 1.19 1.14 1.09 1.06 1.03 1.0 0.97 0.95 0.93 0.91 0.89 0.87 0.85 0.84 0.83 0.81 0.79 0.77 0.75 0.73
Einit: 0.0 50 100 150 200 250 300 350 400 450 500 700 900 1100 1300 1500 1700 1900 2100 2300 2500 2700 2900 3100 3300 3500 3700 3900 4100 4300 4500 4900 5300 5700 6100
}
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