Elegant users forum

Hi Michael, Yes, I noticed the line in lsc.c you showed me, so I basically made the initial particle distribution with xp=yp=0 in the simulations (also for constant beam radius making theory calculations for LSC impedance easier), so there are no position changes due to xp and yp. According to the s...

Hi Michael,

I used LSCDRIFT element to introduce energy modulation, then followed EMATRIX to give r56. So the Lattice actually is simply {LSCDRIFT, EMATRIX, LSCDRIFT, EMATRIX, LSCDRIFT, EMATRIX}. What should I do with LSCDRIFT to turn off longitudinal motion ?

Thanks,
Biaobin

Hi, I am doing simulations about three-stage microbunching instability study. I used a simple model {drift1,BC1,drift2,BC2,drift3,BC3} (where all three BC are EMATRIX elements to only introduce r56, no compression) to benchmark my theory equations. When I am using beam energy as 1GeV, they agree wel...

Hi Soliday, Thank you so much. After installed port and gsl, I can compile SDDS now. In case someone others want to know the details, I listed the following steps in my case. For compiling elegant, - cd oag/apps/configure and edit RELEASE to add epics/base path EPICS_BASE=$(TOP)/../../epics/base - t...

Hi Soliday, I followed the steps as: 1. download the source code and then using "tar xvf ***.tar.gz" - elegant.34.3.1.tar.gz - oag.apps.configure.tar.gz - epics.base.configure.tar.gz - epics.extensions.configure.tar.gz - SDDS.4.0.tar.gz 2. set environmental variable - export RPN_DEFNS=/Users/biaobin...

Hi Soliday, I am trying to compile elegant in my mac since I have modified the source code. I followed the instructions in Linux Guide and successfully compiled the code in Ubuntu 16.04. Then I tried running the Build-AOP-RPMs.tcl and also tried following the step 1 --step 7 in https://www.aps.anl.g...

Hello, When I am tracking particles with a linac, the following lattice layout of line0 and line1 will give different energy chirp calculated from the final particles distribution, W0: WATCH,FILENAME="W0.out",MODE="COORD" W1: WATCH,FILENAME="W1.out",MODE="COORD" CAV0: RFCA,L=15,VOLT="1.5531783542592...

Hi Michael, Sorry to disturb you again. I am doing microbunching instability study in Linac with elegant. I have two questions about the LSC model in Elegant. - Does elegant consider about the energy chirp effects to the whole beam? Physically, the head should be accelerated due to LSC, the tail dec...

Hi Michael, Actually we are talking about the same thing, we are using different units. - (px, py, pz, p) in my previous reply are all in units of [eV/c] - (px, py, pz, p) in your previous reply are all dimensionless, p = beta*gamma, pz = betaz* gamma - In the code, (px, py, pz) are in units of [eV/...

Hi Michael, Sorry for misleading you, I think the initial one is right. I think I understand it now. betaz = vz/c = (m vz)/(mc) = pz/(mv * c/v) = (pz/p)*beta. For highly relativistic particles beta is about 1. So betaz = pz/p, that's what you are using in your code. And for low energy case, beta = s...