Elegant users forum

All files attached. The fiducial bunch takes ~12 minutes with elegant23, second bunch takes ~45 seconds. With elegant21 both bunches take ~45 seconds each. I'm using sample_interval = 10. File is too large to attach (1M particle astra gun file) so I've put in on our ftp site: ftp://ftpanon.diamond.a...

Hi It looks like the fiducialization code has been patched in elegant 23.1.0, now I get a large discrepancy between the first and second bunches output from a jitter simulation even when I set the errors applied to both the first and second bunch to zero. Attached are the results when running an ide...

Hi

Attached ele and lte files for that traceback (the input gun file is ~50MB with 100 pages of 1M particles each produced by the astra2elegant binary from the elegant 22-1 distribution. I was using 3 processors for this test.

Thanks

James

Hi I have a possible bug in Pelegant 22-1 when using first_is_fiducial. Here is the gdb backtrace, it looks like the index i into columnData goes from 0 to the total number of particles (in this case 1000000), but columnData only contains the number of particles loaded by this processor (333333) so ...

Hi Michael

It's an offset quadrupole being used as a bending magnet in the NLS linac. After discussion I think we can add a K1 component to the CSRCSBEND and get the right additional focussing for off-axis particles.

Thanks

James

Hi

I'd like to model an off-axis quadrupole used as a bending magnet with CSR. Is it possible to use CSRCSBEND with a K1 term and FSE to turn off the dipole field but keep the reference co-ordinate bend?

Thanks

James

Hi Elegant-22 is working fine now with Lustre and Infiniband. I've upgraded to openmpi-1.3.3 using the Lustre MPIIO driver, for reference the configure command is: ./configure --prefix=/dls_sw/apps/physics/openmpi-1.3.3 --with-sge --with-io-romio-flags="--with-file-system=lustre+nfs+ufs" Thanks James

I tried that and it builds but it stalls when doing tracking (no output, processor is working), I hadn't got as far as testing pelegant-22 before the file system upgrade so I'm not sure the problem is related. For now I've got a working Pelegant-21 with locking disabled.

#undef F_TEST Works fine for SDDS tools and serial elegant. I still have a problem with parallel elegant using MPI-IO as the openmpi 1.2.7 MPI-IO uses locking. I suspect the correct thing to do is use the Lustre-aware MPI-IO backend (ADIO driver) which is available in openmpi 1.3.3 Until I get the l...

Thanks I will try both and report back.