Search found 26 matches

by arahim
30 Sep 2019, 08:24
Forum: Ring Tracking
Topic: Study of TMCI
Replies: 19
Views: 11778

Re: Study of TMCI

I am trying to find the threshold of microwave instability using the aps upgraded lattice as an example. I am using zlongit for the input of broadband impedance. I have considered the Z/n=0.180 Ohm and freq 50GHz, corresponding RA=6.6e4. But during tracking, particles are getting lost after only few...
by arahim
05 Aug 2019, 06:36
Forum: Ring Tracking
Topic: tracking of longitudinal phase space
Replies: 11
Views: 12471

Re: tracking of longitudinal phase space

Can you please share the script for calculating the alpha3 (third order momentum compaction factor).

Abdurrahim
by arahim
26 Jun 2019, 07:39
Forum: Ring Tracking
Topic: Study of TMCI
Replies: 19
Views: 11778

Re: Study of TMCI

I am trying to make an sdds file for impedance (freq vs real part and imaginary part) using plaindata2sdds. In sdds file many of the rows were missing. I copied the data from data file and pasted in sdds file but during simulation I got error message "frequency values not equally spaced for real dat...
by arahim
26 Jun 2019, 07:25
Forum: Ring Tracking
Topic: Study of TMCI
Replies: 19
Views: 11778

Re: Study of TMCI

Thanks a lot. It worked..
by arahim
16 Jun 2019, 02:41
Forum: Ring Tracking
Topic: Study of TMCI
Replies: 19
Views: 11778

Re: Study of TMCI

I want to incorporate amplitude dependent tune shift (ADTS) in TMCI simulation. During calculation of ADTS by elegant, particle is being lost in few hundred of turns but in Accelerator tool box particle is surviving after 1000 turns even with higher initial launching amplitude. What is wrong with my...
by arahim
29 May 2019, 07:50
Forum: Ring Tracking
Topic: Study of TMCI
Replies: 19
Views: 11778

Re: Study of TMCI

I am tracking 10 ps (one sigma) bunch for microwave threshold in a storage ring. The input for longitudinal impedance is as follows: zz: zlongit,broad_band=1,freq=30e9,Rs=42e3,Q=1,bin_size=4.2e-12,n_bins=0 I have given the option for auto resizing the number of bins. It works for low beam current bu...
by arahim
01 May 2019, 09:13
Forum: Parallel Elegant
Topic: Pelegant is taking too much time
Replies: 2
Views: 7666

Pelegant is taking too much time

I am running run2.ele on sequential and parallel version of elegant. On seq. elegant run is completed in ~ 5 minutes, while with pelegant program is still running even half an hour is passed. I am using pelegant with 12 processors. Will the syntax of the input file will be same in elegant and pelega...
by arahim
06 Apr 2019, 01:06
Forum: Ring Tracking
Topic: Study of TMCI
Replies: 19
Views: 11778

Re: Study of TMCI

Thanks a lot..it works..
by arahim
05 Apr 2019, 08:25
Forum: Ring Tracking
Topic: Study of TMCI
Replies: 19
Views: 11778

Re: Study of TMCI

I am using ztransverse for the simulation of TMCI. I have given the command in the following way.. zz_rw_trans: ztransverse, & zxreal="rw_cdr2014v1.impe1=f+ReZxH", zximag="rw_cdr2014v1.impe1=f+ImZxH", & zyreal="rw_cdr2014v1.impe1=f+ReZyH", zyimag="rw_cdr2014v1.impe1=f+ImZyH", & n_bins=4096, bin_size...
by arahim
13 Feb 2019, 23:43
Forum: Ring Tracking
Topic: tracking of longitudinal phase space
Replies: 11
Views: 12471

Re: tracking of longitudinal phase space

Thanks a lot. It is working fine. As I understood, vary_element will execute all the command mentioned prior or after it on the .ele page in every loop. Please correct me if I am wrong. n_steps, n_indices and index_number are not very clear to me from the elegant manual. Please help me to understand...