Search found 26 matches

by arahim
15 Dec 2020, 02:21
Forum: Ring Tracking
Topic: Varying the value of charge
Replies: 1
Views: 4057

Varying the value of charge

I am tracking the particles to study the beam instability. The lattice file includes charge, impedance files and various watch points and other elements. Every time I vary the value of charge in the lattice file, then perform the tracking. I want to use use &vary element in run file to change the ch...
by arahim
01 Dec 2020, 23:08
Forum: Parallel Elegant
Topic: Different results in pelegant
Replies: 2
Views: 6129

Re: Different results in pelegant

Yes, it is due to less number of particles. Thanks..
by arahim
26 Nov 2020, 02:12
Forum: Parallel Elegant
Topic: Different results in pelegant
Replies: 2
Views: 6129

Different results in pelegant

During the tracking of the particles for instability study in the ring using pelegant (2019.1.1, Jun 27 2019), I am getting different results, when I am selecting 1node 32processors and 5nodes and 1 processor(per node). In one case vertical emittance is blowing, while in another it is stable. What i...
by arahim
23 Oct 2020, 00:42
Forum: Parallel Elegant
Topic: Pelegant is taking too much time
Replies: 2
Views: 7623

Re: Pelegant is taking too much time

How should we select the optimum number of nodes and and optimium number of processors to track the single bunch in a storage ring to study the single bunch instabilities. I have taken number of particles 100000 in a bunch and tracking 500000 turns.
by arahim
06 Jul 2020, 00:02
Forum: Ring Tracking
Topic: Tracking a beam coming from linac in to booster
Replies: 3
Views: 4706

Re: Tracking a beam coming from linac in to booster

Thanks..I had tracked up to 10 Lakh turns. Correcting the RF frequency and clean command actually worked well.. Thank you vey much..
by arahim
30 Jun 2020, 07:31
Forum: Ring Tracking
Topic: Tracking a beam coming from linac in to booster
Replies: 3
Views: 4706

Tracking a beam coming from linac in to booster

I have generated a linac output bunch (single) by the command &bunched_beam. &bunched_beam n_particles_per_bunch = 20000, emit_x = 60e-09, sigma_dp = 0.005, sigma_s = 0.15, emit_y = 60e-09, beta_x = 15.83, alpha_x=2.6589, beta_y = 5.45, alpha_y=-0.9191, eta_x = 0.27655, etap_x=-0.0468, enforce_rms_v...
by arahim
24 Jun 2020, 07:43
Forum: Ring Tracking
Topic: Study of TMCI
Replies: 19
Views: 11709

Re: Study of TMCI

I could locate the error...The lattice is having non zero values of alphax,alphay and etapx. I was not assigning these parameters any values in my input files and hence by default, code is reading them as zero and hence emittance blowing..
Arahim
by arahim
08 Jun 2020, 04:55
Forum: Ring Tracking
Topic: Study of TMCI
Replies: 19
Views: 11709

Re: Study of TMCI

Dear Dr. Borland, I am tracking the beam (single bunch) through the Ring1 lattice without any impedance but the horizontal emittance, energy spread and bunch length is keep on increasing with the number of turns, while vertical emittance is nearly constant. I have configured the RF with the paramete...
by arahim
05 Oct 2019, 04:52
Forum: Ring Tracking
Topic: Study of TMCI
Replies: 19
Views: 11709

Re: Study of TMCI

Thanks a lot for your quick help. As per your suggestion, I will increase the number of particles in the simulation. I have a doubt about Ra. For a given value of Z_longitudinal/n in a storage ring, what value of Ra should be fixed for the input of zlongit ? I have calculated the Ra to be given as a...
by arahim
03 Oct 2019, 04:34
Forum: Ring Tracking
Topic: Study of TMCI
Replies: 19
Views: 11709

Re: Study of TMCI

Thanks a lot..It worked. To simulate the microwave instability, I have used the elegant functions ILMATRIX, SREFFETCS, RFCA and ZLONGIT in the above files but the elegant tracking result gives an underestimated value (~0.1mA) of microwave threshold. I have doubt whether I have chosen the correct fun...