Elegant users forum

Dear Soliday, I seems to find a way of overcoming this problem. Currently in my pressure file, I have only two lines of data corresponding the start and end of the lattice. After I duplicate the pressure data in some middle points, making 11 lines of the total data, it seems the problem is gone. I c...

Dear all, When I run ion-effects simulation, sometimes I encounter the following errors: *** Error in `/dls/physics/wsw/ELEGANT2022/2022/bin/Pelegant': realloc(): invalid old size: 0x0000000001c48870 *** ======= Backtrace: ========= /lib64/libc.so.6(+0x7f474)[0x2ac4b92f6474] /lib64/libc.so.6(+0x8486...

Hi Joe, It seems for my case, the bi-lorentzian fit gives a result that looks a little better than bi-gaussian. The charge distribution looks more like a concave curve but the bigaussian gives a more convex curve. And the gaussian fit feels underestimated the charge distribution. Here are the three ...

Hi Joe, Many thanks for the reply. This is also what I observed in my simulation, I did a case with a strong vacuum pressure which leads to strong ion instability. I tested the same case with both 'gaussian' and 'bigaussian', and the 'gaussian' gives a stable result while 'bigaussian' gives an obvio...

Hi, Recently I'm trying to simulate ion effects. When I changed the field_calculation_method from 'gaussian' to 'bigaussian', I encountered a huge increase in execution time, maybe 10 times slower. I'm using ILMATRIX and only one interaction point per turn, and macro_ions=1, it is already very slow....

I'm facing the same problem. Recently I'm doing hybrid mode filling patterns and charge variation where each bunch have different charges. Now I have to use different number of particles to distinguish the charge difference, this is fine for a standard filling pattern where the charges of different ...

Dear Michael, Recently I'm studying transverse effect of cavity Higher Order Modes using the element FTRFMODE. I found that when I changed the n_cavities from 8 to 1 it gives me the same result. Then I downloaded the newest elegant source code and looked into the code, it seems in both 'RFMODE', 'TR...

Dear Michael

Many thanks, now I can understand the script and get correspondence with paper.

Best regards,
Siwei

Dear Michael, Recently I'm studying the transverse multi-bunch feedback and is using the script 'TFBFirSetup' from the elegant example 'APS-24Bunch-CBI'. I learned from elegant forum that this script is using T. Nakamura's Time-domain least squire fitting theory to get the N-tap FIR coefficients. Ho...

Dear Michael It seems the problem comes from when I duplicated the bunch to make the beam, I give a minus value to the duplicate_stagger[4], making the bunches in the beam have a decreasing sequence in time. In this case it seems LRWAKE is dealing with the beam as a single bunch, so it gave a much s...