Dose the envelope contain the dispersion effect?

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ChinaZhaoliangchao
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Dose the envelope contain the dispersion effect?

Post by ChinaZhaoliangchao »

Dear Didier,

When I plot the beam envelope in 'Envelope' mode, it looks like the envelope does not contain the dispersion effect. But in 'Partran' mode, the dispersion effect is shown in the envelope.

So, does the envelope contain the dispersion effect (in "Envelope" mode) ?Or, how to enable it?
Attachments
line1.dat
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line1.ini
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dispersion function.png
dispersion function.png (39.01 KiB) Viewed 6590 times
plot in partran mode.png
plot in partran mode.png (53.99 KiB) Viewed 6590 times
plot in envelope mode.png
plot in envelope mode.png (62 KiB) Viewed 6590 times
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FranceDidier
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Re: Dose the envelope contain the dispersion effect?

Post by FranceDidier »

Dear Zhao,

The dispersion effect shown in the partran is due to input energy spread you have defined to 0.6 MeV. In envelope mode, your beam iis defined as CW, no spread can be considered.
spread.png
spread.png (4.67 KiB) Viewed 6585 times
If you want to have something similar you have to defined beam like following picture. Its not exactly the same input energy spread, but by this way envelope and teacking will be the same.
spread2.png
spread2.png (4.13 KiB) Viewed 6585 times
input_twiss.png
input_twiss.png (11.64 KiB) Viewed 6585 times
Regards,

Didier
ChinaZhaoliangchao
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Re: Dose the envelope contain the dispersion effect?

Post by ChinaZhaoliangchao »

So it is. Thank you.

Best regards
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