The OPAL Discussion Forum

[zahra fathi <zahrafathi1371 AT gmail.com>]

Dear Dr. Frifderich,

Thank you  for your response. Yes, I am using OPAL-cycl. You were right! I opened the .h5 file and there are all things that I need (the total beam size, etc)!

I am grateful for your help.

Best wishes

Zahra

On Sat, Oct 16, 2021 at 3:45 PM Dr. Simon Friederich <s.friederich AT uni-mainz.de> wrote:

Dear Zahra,

You are using OPAL-cycle, right? I'm sorry, I've only used OPAL-t so far.

If the results from the .stat file are different, maybe OPAL-cycle allows to get a 6D bunch distribution from the .h5-file from which you can extract the maximum beam dimensions?
In OPAL-t I can get everything I want from it (and as far as I understood the .stat-file results are computed from the distributions which are saved in the .h5 file).

Best regards
Simon

Dr. Simon Friederich
Helmholtz Institut Mainz 
Johannes Gutenberg-Universität Mainz
Staudingerweg 18
D 55128 Mainz

Postanschrift
Insitut für Kernphysik
Kollaboration B
Johannes Gutenberg-Universität Mainz
Johann-Joachim-Becher-Weg 45
D 55128 Mainz

Tel.: +49 (0)6131 39-23160
E-Mail: s.friederich AT uni-mainz.de

Am 16.10.2021 um 08:21 schrieb zahra fathi:

Dear  Dr. Friederich,

thank you for your reply. The radius of the Cyclotron which I simulated is about 0.45m. I drew max_x,_y and_s vs Energy (it is in attachment), it seems max_x,_y and_s present the location of the beam in the Global coordinate of the cyclotron (not the total beam size with respect to the reference particle). It would be appreciated if you could help me in this way.

Thank you for your time

Best regards

Zahra

On Thu, Oct 14, 2021 at 3:13 PM Dr. Simon Friederich <s.friederich AT uni-mainz.de> wrote:

Dear Zahra,

Concerning the total beam size:
The max_x, max_y and max_s values from the .stat file inherit the total
beam size.

Best regards

Simon

Dr. Simon Friederich
Helmholtz Institut Mainz
Johannes Gutenberg-Universität Mainz
Staudingerweg 18
D 55128 Mainz

Postanschrift
Insitut für Kernphysik
Kollaboration B
Johannes Gutenberg-Universität Mainz
Johann-Joachim-Becher-Weg 45
D 55128 Mainz

Tel.: +49 (0)6131 39-23160
E-Mail: s.friederich AT uni-mainz.de

Am 14.10.2021 um 13:23 schrieb Zahra:
> Hi OPAL group!
> I am new to OPAL. I simulated the beam of a 11MeV Cyclotron using OPAL2.4.0. I
> want to study beam characteristics like beam size. I want to reach the bunch
> distribution. Is there a way to obtain total beam size (not its rms)?
> As we know, rms_x,_y and_s are exist in .stat file, which I drew rms_x,_y
> and_s vs Energy. It is in this link[https://postimg.cc/KKZP7rbD]. Is this
> order of rms_BeamSize acceptable? And Is there a person who knows, what
> happened on beam in 4-10 MeV which make rms_BeamSize (x and y) grow?
> Any help is appreciated