Mismatch MEBT lattice  [SOLVED]

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Norwayyngvelevinsen
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Mismatch MEBT lattice

Post by Norwayyngvelevinsen »

Hi

After version 2.23.3.4 of TraceWin, we see a significant mismatch between MEBT and DTL, with a 50% beam loss at the entrance of DTL (partran).

Tested on Linux only. Would you be able to advise? With 2.23.3.3 and older, we see only very litlte losses, maybe 0.2% for same sections.
Attachments
partran1.out
(236.04 KiB) Downloaded 134 times
MEBT.ini
(43.77 KiB) Downloaded 109 times
lattice.dat
(37.43 KiB) Downloaded 111 times
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FranceDidier
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Re: Mismatch MEBT lattice

Post by FranceDidier »

Dear Yngve,

I tried with the version 2.23.3.5 & last one 2.23.3.8 on Linux and Windows and I have no significant losses in any case. Well, I had to use my own RFQ output distribution, that's the only difference I have with your case.
losses.png
losses.png (14.24 KiB) Viewed 2247 times
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Re: Mismatch MEBT lattice

Post by Norwayyngvelevinsen »

Hi

Thanks for coming back to me so quickly. Sorry yes, I forgot to attach the dst file. I see as well that with the generated distribution (6D ellipse) I have same behaviour as you. I also tried to check if updating the beam parameters based on the input file would change it, but I still did not see any losses. Using the attached dst file for the input beam and I get the behaviour I described originally.
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part_rfq_bad.dst
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Re: Mismatch MEBT lattice  [SOLVED]

Post by FranceDidier »

Dear Yngve,

Sorry for that, It's fixed

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Didier
Norwayyngvelevinsen
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Re: Mismatch MEBT lattice

Post by Norwayyngvelevinsen »

Thank you for the quick fix. I can confirm simulations behave as expected again.
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