CEA Codes forum

Hi,

Your example finally works perfectly, it does nothing!
Indeed as you ask to have identical TWiss parameters at the same position, it is easy, it is obviously always true.
I don't really understand what you want to do

Regards,

Didier

I want to set α_x=α_y, β_x=β_y at a location.
There's a diag_dbeta, but there's no diag_dalpha command.

Ok, we didn't understand each other, sorry.
A new diagnostic, DIAG_DTWISS2, does what you ask.

Regards,

Didier

Thank you very much!

Another command may be like DIAG_SET_MATRIX2 to check the "Beam matrix" element since sometimes I need to check beam parameters at a position. For example, how to match the m_13 element when a solenoid is introduced before.

Kinds,
shliu

Dear Didier,

Maybe the command DIAG_SET_MATRIX is already enough for my problem. Thank you!

Kinds,
shliu

Dear Shliu,

Very well

Didier