laser modulation in helical undulator

[michael_borland]

Zhen,

Alas, we didn't think to provide that feature. Should be easy to get into the next version. If you build from source, I can provide a patch.

--Michael

[michael_borland]

Zhen,

Actually, you can do that. I missed it when I checked the manual. Just set the LASER_TILT parameter to whatever angle you want (default is zero).

--Michael

[zzhang]

Michael,

Sorry I didn't notice your reply. I am confused about the LASER_TILT. I thought it meant to tilt the wave front of the laser pulse, which is similar with the work of Phys. Rev. ST Accel. Beams 17, 070701. Here I want to rotate the polarization direction of the laser to generate electric field components of the laser in the two directions. Is this different with the meaning of the LASER_TILT?

Thanks for your help.

Zhen

[michael_borland]

Zhen,

Sorry for the late reply. LASER_TILT is rotation about the propagation axis, so it's what you want.

--Michael