Field map implementation

[Vyacheslav]

Dear Didier,
does any 'synoptic' button exist to plot arrangement of field maps in (x,y) plot?
It is needed in order to control location accuracy of field maps in space.

[Didier]

Dear Vyacheslav,*

No, and the only thing I could imagine would be to draw and orient the field_map in the synoptic graph using the data from the SUPPORPOSE_MAP and SUPPERPOSE_MAP_OUT commands. And of course that wouldn't help you.

Regards,

Didier

[Vyacheslav]

Dear Didier,
why is zero electric RF field on field map viewer?

map.jpg (57.34 KiB) Viewed 3360 times

Data in the field files are in MV/m.

On more addition about notation on the plot: Electrique->Electric.

[Didier]

Dear Vyacheslav,

It's because you set 'ke' parameter to '0'
And thank you, I have corrected the spelling error you noted (next version)

Regards,

Didier

field_e.png (109.3 KiB) Viewed 3358 times

[Vyacheslav]

Am I right that Ez(x,y,z,t)=Ez(x,y,z)*cos(omega*t-kz*z), where Ez is the field map data value is a correct expression for the right-side of z-motion equation?

[Didier]

What is 'kz' ?

Didier

[Vyacheslav]

kz=2*pi/beta*lambda - longitudinal propagation factor (wave number)

[Didier]

Ok, so, I agree with your expression

Regards,

Didier

[Vyacheslav]

Dear Didier,
why does Linac Energy differ from Beam one?

energy.jpg (67.47 KiB) Viewed 3350 times

What does Linac Energy mean? Is it energy of the synchronous particle?
Is the beam energy is the mean value on the all particle energies?

How can I change synchronous particle phase? Just using SET_SYNC_PHASE before FIELD_MAP and put the third parameter equals to the desired synchronous particle phase or by means of SET_BEAM_E0_P0?

One more question. How do I plot/visualize graphs of the existing and calculated project after shutdown on the TraceWin and the following restart of it without recalculation/treatment of the project?

[Didier]

Dear Vyacheslav,

Linac: corresponds to perfect particle transpor in perfect linac
Beam : is real beam including average beam centroid and linac errors
So, your plot, it's envelop result of a beam where you set an phase centroid errors, it's why beam curve is not simillar to "linac" one

To change synchronous phase the first way is to change by hand the RF phase or lets code do it itseft, using SET_SYNC_PHASE

And your last question: perform 2 runs with or without matching options.

Regards,

Didier