1. EM simulations of the LHC beam screens including the weld
Preliminary analysis
C. Zannini, E. Metral, G. Rumolo, B. Salvant

2. Model studied LHC design as it is built and installed
In this step we are only interested to understand the effect of the weld .
weld

3. Model studied
a=46.4 mm
b=36.8 mm
w=2 mm
L=1m w b a L

4. Comparing with and without weld
For a displacement in x of 5 mm the horizontal dipolar wake with weld seems to be five time larger than the wake without weld

5. Horizontal dipolar wake with weld versus displacement
The displacement is considered negative if it is in the direction opposite the weld
The horizontal dipolar wake with weld for a displacement in x of -5 mm seems to be twenty-five time larger than the wake with weld for a displacement in x of 5 mm

6. Comparing dipolar terms
xdip weld  2*xdip_noweld
xdip 2weld  2*xdip_weld