1. Transverse impedance of trapped modes in LHC collimator
A.Grudiev
RLC meeting

2. r=2R Shunt impedance Accelerator definition: r
RLC-circuit definition: R
r=2R
Use loss(kick) factor instead of impedance

3. Kick factor of transverse modes
Two formula have been used in order to check numerical accuracy:

4. Table of transverse mode parameters: gap = 5 and 2.5 mm
gap = 5 mm
f[GHz] Q ry[kΩ/m] ky[V/nC/mm] Δky[%]
gap =2.5 mm
f[GHz] Q ry[kΩ/m] ky[V/nC/mm] Δky[%]

5. Estimate of tune shift due to l=0 head-tail mode in SPS

6. Tune shift due higher order head-tail modes

7. Transverse impedance calculated using Gdfidl (red) and reconstructed from HFSS data (blue)