The Mode Summary table is shown for every OM2p and OM3p simulation. It provides calculations of the mode characteristics for each mode in the simulation.
Mode Summary Parameters
Quantity 
Expression 
Units reported 
Output By 
Notes 

Frequency 
f 
GHz 
OM2p and OM3p 
The resonant frequency of the extracted mode. 
Voltage 
where ω = 2πf is the resonant radial frequency, β is the particle velocity (as a fraction of c) as predefined in the simulation properties dialog box (default value is 1), and c is the speed of light in vacuum. 
Volts 
(None) 
Not output. The voltage is used to compute other quantities in the Mode Summary table. The integration path you defined in the simulation properties dialog box determines the axial direction z as well as the position of the integration in the transverse plane, indicated by (r, θ). 
Energy 
where E is the electric field, is the relative permittivity tensor, and the integral is taken over the cavity volume. 
Joules 
OM2p and OM3p 
Mode energy, or stored energy. The mode fields are always normalized so that this quantity is numerically equal to the freespace permittivity ε_{0}. 
Shunt impedance 
where P_{l} is the wall power loss, described as follows. 
ohms 
OM2p in RZ coordinates, and OM3p. 
Output when Compute Accelerator Results is True in the simulation setup dialog Solver tab. The shunt impedance is calculated over the shunt impedance integration path you predefined in the simulation properties dialog box. 
Q _{total} 

unitless 
OM2p and OM3p 
Total quality factor of the cavity. 
Q _{ wall loss } 
where W is the mode energy, defined above, and P_{l} is the wall power loss defined as follows. 
unitless 
OM2p and OM3p 

Q _{material} 
where tan(δ) is the electric loss tangent. 
unitless 
OM2p and OM3p 

Wall power loss 
where H is the magnetic field, and the integral is over all conducting surfaces. 
Watts 
OM2p and OM3p 
Wall power loss is calculated over the surface of all electrical conductors in the geometry, where R_{s} is the conductor sheet resistance. For PEC, R_{s} is calculated based on the settings in the simulation setup dialog, in the Solver tab, under Power Loss Calculations. 
R/Q 

ohms 
OM2p in RZ coordinates, and OM3p. 
Output when Compute Accelerator Results is True in the simulation setup dialog Solver tab. Ratio of shunt impedance to quality factor. 
Kick factor 
where W is the mode energy and L is the integration path length. 
V/(C*m^{2}) 
OM2p in RZ coordinates, and OM3p. 
Output when Compute Accelerator Results is True in the simulation setup dialog Solver tab. The kick factor is calculated over the kick factor integration path you predefined in the simulation properties dialog box. Unlike the shunt impedance integration path, the kick factor integration path is typically defined slightly offaxis. In OM2p, the kick factor is only computed for RZ coordinate geometries where the azimuthal mode number is set to 1. 
Peak Efield magnitude 
E _{p} 
V/m 
OM2p and OM3p 
Peak electric field magnitude in the cavity. The location is also output. 
Peak Hfield magnitude 
H _{p} 
A/m 
OM2p and OM3p 
Peak magnetic field magnitude in the cavity. The location is also output. 
Peak surface Efield magnitude 
E _{s} 
V/m 
OM2p and OM3p 
Peak electric field magnitude on a conducting surface. The location is also output. 
Peak surface Hfield magnitude 
H _{s} 
A/m 
OM2p and OM3p 
Peak magnetic field magnitude on a conducting surface. The location is also output. 
Peak axial electric field magnitude, on axis 
E _{a} 
V/m 
OM2p and OM3p 
Peak axial electric field magnitude, on axis. The location is also output. 
Peak axial magnetic field magnitude, on axis 
H _{a} 
A/m 
OM2p and OM3p 
Peak axial magnetic field magnitude, on axis. The location is also output. 
Average accelerating gradient 

V/m 
OM2p in RZ coordinates, and OM3p. 
Output when Compute Accelerator Results is True in the simulation setup dialog Solver tab. The average acceleration gradient is found by calculating the voltage along the shunt impedance integration path, and dividing by the length of the path. 
E_{p}/E_{acc} 
unitless 
OM2p in RZ coordinates, and OM3p. 
Output when Compute Accelerator Results is True in the simulation setup dialog Solver tab. 

E_{s}/E_{acc} 
unitless 
OM2p in RZ coordinates, and OM3p. 
Output when Compute Accelerator Results is True in the simulation setup dialog Solver tab. 

H_{s}/E_{acc} 
Siemens 
OM2p in RZ coordinates, and OM3p. 
Output when Compute Accelerator Results is True in the simulation setup dialog Solver tab. 

Transit time factor 

unitless 
OM2p in RZ coordinates, and OM3p. 
Output when Compute Accelerator Results is True in the simulation setup dialog Solver tab. The transit time factor is calculated over the shunt impedance integration path you predefined in the simulation properties dialog box. 
Geometric factor 
where μ_{0} is the free space permeability, and σ is the bulk conductivity of the metal walls. 
ohms 
OM2p in RZ coordinates, and OM3p. 
Output when Compute Accelerator Results is True in the simulation setup dialog Solver tab. The geometric factor is independent of any material losses within the cavity. It depends only on the shape of the cavity and the losses in the metal walls of the cavity. 
Periodic phase advance 
degrees 
All problems with periodic boundaries. 
In periodic problems, this shows the phase advance preset by the user in the simulation properties dialog box. 

Power flow 
where S_{m} is the periodic master surface, and S_{s} is the periodic slave surface. 
Watts 
All problems with periodic boundaries. 
In periodic problems, the power flow is the power that passes through the structure. It is calculated as the average of the power into the master surface and the power out of the slave surface. 
Integration path length 
L 
centimeters 
OM2p and OM3p 
Output when Compute Accelerator Results is True in the simulation setup dialog Solver tab. Effective length of the shunt impedance integration path, accounting for any clipping and symmetry in the geometry. 
Symmetry volume fraction 
unitless 
OM2p and OM3p 
In geometries with symmetry planes, this gives the fraction of the total structure that is included in the simulation. 
The Stored Energy By Material table displays stored electric and magnetic energy, by material.
The Dispersion Curve table is only shown in simulations with periodicity, where a Periodic Master/ Periodic Slave pair of boundary conditions has been used. In such problems, the Dispersion Curve table shows the mode frequency as a function of phase advance.
All of the above results can be viewed by changing the Primary/Qualifier 3 parameter.
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