ocelot.cpbd.reswake

writen by I. Zagorodnov, DESY and S.Tomin XFEL, 2015.

Module Contents

Functions

wake2impedance(s, w)	Fourier transform with exp(iwt)
impedance2wake(f, y)	Fourier transform with exp(-iwt)
imp_resistiveAC_SI(f, cond, a, tau, L)	resistive impedance of round pipe (in SI Units)
ResistiveZaZb(xb, bunch, a, conductivity, tau, Ind)	param xb
LossShape(bunch, wake)	loss, spread, peak
pipe_wake(z, current, tube_radius, tube_len, conductivity, tau, roughness, d_oxid)	param z
xfel_pipe_wake(s, current)	param s smaller number (usually negative) is the head

ocelot.cpbd.reswake.wake2impedance(s, w)

Fourier transform with exp(iwt) s - Meter w - V/C f - Hz y - Om

ocelot.cpbd.reswake.impedance2wake(f, y)

Fourier transform with exp(-iwt) f - Hz y - Om s - Meter w - V/C

ocelot.cpbd.reswake.imp_resistiveAC_SI(f, cond, a, tau, L)

resistive impedance of round pipe (in SI Units) dimensions: f - Hertz

cond - in 1/Second a - pipe radius in m tau - the relaxation time in s L-inductive for dielectric layer

ocelot.cpbd.reswake.ResistiveZaZb(xb, bunch, a, conductivity, tau, Ind)

Parameters

• xb –

• bunch –

• a – tube radius

• conductivity –

• tau –

• Ind –

Returns

ocelot.cpbd.reswake.LossShape(bunch, wake)

loss, spread, peak dimensions:

wake - m , Volt/pC out - V/pC;

ocelot.cpbd.reswake.pipe_wake(z, current, tube_radius, tube_len, conductivity, tau, roughness, d_oxid)

Parameters

• z –

• current –

• tube_radius –

• tube_len –

• conductivity –

• tau –

• roughness –

• d_oxid –

Returns

ocelot.cpbd.reswake.xfel_pipe_wake(s, current)

Parameters

• s – smaller number (usually negative) is the head

• current –

Returns

s, current, wake

ocelot.cpbd.reswake.tube_radius = 0.005