Field Map Cavities Errors on Ex; Ey; Ez

[comunian]

Dear Didier,
In TraceWin, it is possible to include errors in the cavity-field, from a field map, amplitude (E), expressed as a percentage.
However, in superconducting cavities, effects such as thermal deformation may also modify the relative contributions
of the electric-field components (E_x;E_y;E_z), without simply changing the overall field amplitude.
Is it possible to include this effect in the error study by introducing independent relative weights for the three components, for example
E=a_1*E_x;a_2*E_y;a_3*E_z,
with a relative normalization such as
a_1^2+a_2^2+a_3^2=1,
while retaining the existing global field-amplitude normalization through (E_0)?
In other words, the global amplitude error would still be controlled by (E_0), as it is currently,
while additional errors would modify the relative distribution among E_x; E_y; and E_z.
Best Regards,
Michele Comunian

[Didier]

Dear Michele,

At present, the error Ez is defined as E = Eo(1 + Err). Err is defined as a random value between [-Err; +Err]. I could envisage adding two parameters, Errx and Erry, to the error definition commands, but how do you think the random selection should be carried out?

Regards,

Didier