CEA Codes forum

Dear sir,
I met a probelem when I used a distribution from input particle file. I don't know why. Thank you.

Dear Didier,

There's a command named "Diag_Current" for beam transmission efficiency matching. I'm wondering if it's possible to add a "Diag_Particles" command for fast matching without considering beam current (Zero input current)?

Kinds,
shliu

Dear Sir,
I wonder how to modify the display format of numbers on an image, such as representing decimals in scientific notation like changing 0.001 to 10^-3 in the image shown in the attachment?

Best,
shuhui

Dear Didier,

Would you mind adding two commands according to the same beam center position and angle for x and y?

DIAG_DPOSITION for the same position center for x and y at the same position, and DIAG_DDIVERGENCE for the same angle center for x and y at the same position.

Kinds,
shliu

Dear Didier,

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

Kinds,
shliu

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

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.

Hi Didier,

I upload the project file to check the problem with the command diag_dtwiss.

Could you help to check it? Maybe I didn't quite understand the description in the manual.

Kinds,
shliu

Thank you!

Then how about the last problem? How to use diag_dtwiss. Is there a simple example?

BTW, how to set the same twiss parameters at the same position? Would there be an example?I list a .dat file here. DRIFT 300 75 0 0 0 ADjust 101 1 0 SOLENOID 100 1 75 DRIFT 300 75 0 0 0 DIAG_WAIST 101 1 1 ADJUST 102 1 0 EDGE 0 1600 150 0 0 75 0 BEND 45 1600 0 75 0 ADJUST 102 1 0 EDGE 0 1600 150 0 0 ...