use a tilted CSBEND to correct kick

[minjie_yan]

Dear Michael,

My beamline consists mainly of (HKICK, ..., tilted CSBEND, ... ). The CSBEND is tilted in such a way that it corrects the horizontal kick from the upstream HKICK back to zero , and at the same time bends the beam vertically. This means that I need something corrects the trajectory in the horizontal plane, but changes the reference orbit in the vertical plane.

I am thinking of replacing the tilted CSBEND with a zero-length HICK, followed by a vertical CSBEND...

Do you know how to work around this problem? What would you recommend?

Thanks in advance!

best regards,

Minjie

[michael_borland]

Minjie,

Can you explain a little more about why you are doing this? Is the bending magnet supposed to bend in the vertical primarily, but also has some error in the tilt angle?

--Michael

[minjie_yan]

Hi Michael,

We actually want to simulate a scenario of a kicker and septum. The bending magnet is supposed to bend in the vertical plane primarily, and with some very small "error" in the tilt angle, which is intended to correct the kick from the HKICKER. (unfortunately we don't have much spaces left between the kicker and the septum for further elements. So the beam enters the septum still with the kick. )

best regards,

Minjie

[michael_borland]

Minjie,

In that case, what you probably should use is a combination of TILT and ETILT. Set TILT="pi 2 /" to get a vertical bend, which will change the reference coordinates. Set ETILT (Error TILT) to some small angle, which will give corresponding errors relative to the reference coordinates in both planes.

--Michael

[minjie_yan]

Thanks for the suggestion! I will try with it.