[POTKU] no observed ions in Potku simultion

Thu Nov 9 09:46:47 EET 2023

Hi Mikko,

Thanks for the quick response.

I have a full day of meetings about to start, but very quickly:

> does the output window give many "energy would change too much in the 
> virtual detector" -notifications?
it gives some yes, but hard for me to say if this is "many" though.
The below is a sample of the output when running with just one 
processor. "ions observed" remains zero throughout.

/Presimulation finished
Calculated 0 of 1000000 ions (0%)
Calculated 10000 of 1000000 ions (1%)
Calculated 20000 of 1000000 ions (2%)
Calculated 30000 of 1000000 ions (3%)
Calculated 40000 of 1000000 ions (4%)
Calculated 50000 of 1000000 ions (5%)
Calculated 60000 of 1000000 ions (6%)
Calculated 70000 of 1000000 ions (7%)
Calculated 80000 of 1000000 ions (8%)
Calculated 90000 of 1000000 ions (9%)
Energy would change too much in virtual detector
Energy would change too much in virtual detector      1.713 MeV
Energy would change too much in virtual detector     -0.871 MeV
Energy would change too much in virtual detector
Calculated 100000 of 1000000 ions (10%)
Energy would change too much in virtual detector
Calculated 110000 of 1000000 ions (11%)
Calculated 120000 of 1000000 ions (12%)
Calculated 130000 of 1000000 ions (13%)
Calculated 140000 of 1000000 ions (14%)
Energy would change too much in virtual detector
Calculated 150000 of 1000000 ions (15%)
Energy would change too much in virtual detector
Calculated 160000 of 1000000 ions (16%)
Calculated 170000 of 1000000 ions (17%)
Calculated 180000 of 1000000 ions (18%)
Calculated 190000 of 1000000 ions (19%)
Energy would change too much in virtual detector     -1.114 MeV
Energy would change too much in virtual detector
Calculated 200000 of 1000000 ions (20%)
Calculated 210000 of 1000000 ions (21%)
Energy would change too much in virtual detector
Calculated 220000 of 1000000 ions (22%)
Calculated 230000 of 1000000 ions (23%)
.....
/
> a) If you want you could possibly sent the project file to me to look 
> it closer..or possibly faste option forward:
> b) Second option could already be: the sneak peak for the next potku 
> release which is about just to emerge.
If will try option b) as a first attempt, as I am also quite eager to 
see the new version anyway.
If this fails I will send you the project folder, this won't be until 
later this evening though (due to meetings).

> Our university web pages have just went through large refreshment, and 
> some "old" pages cannot be accessed at the moment, Potku page included.
Yes, I noticed this a couple of days ago.
Our pages are due a refresh very soon too, so I am waiting to experience 
similar problems here haha

I'll let you know how I get on.
/Rob

*Robert Frost MEng PhD *
Researcher in the Ion-physics Group
Division of Applied Nuclear Physics
Department of Physics & Astronomy
Uppsala University
Sweden
email: rob.frost at physics.uu.se
phone: +46 (0) 723411586

On 09/11/2023 08:24, Laitinen, Mikko wrote:
> Good morning Robert, All Potku users,
>
> All the parameters in the screenshots seems ok for the MCERD 
> simulations, at first glimpse.
>
> However, does the output window give many "energy would change too 
> much in the virtual detector" -notifications?, and by a lot I mean 
> thats only it gives? (one could try only single processor to test the 
> re-occurrence too?)
> Example text:
>
>
> This kind of "no ions" would be the 'typical' case for hydrogen, for 
> example, if the minimum energy is set to "1 MeV". This is because the 
> minimum energy needs to be about half the smaller than the actual ion 
> energy one wants to simulate/match. But, this should not be the issue 
> now for the Aluminum. At the moment, I dont recall this issue, or the 
> solution to this.
>
> ---
> a) If you want you could possibly sent the project file to me to look 
> it closer..or possibly faste option forward:
> b) Second option could already be: the sneak peak for the next potku 
> release which is about just to emerge.
> This can be found from Github already for win, mac and linux:
> https://github.com/JYU-IBA/potku/releases/tag/2.2.0
>
> In this version, there's still few known issues (have been fixed up 
> mostly), like
> 1) in some simulation related crash, the previous data cannot be opened
> 2) changing the fluence in simulations prompts "simulations need to be 
> re-done"
> 3) few minor issues
>
> But once those are also fixed, next week?, I will announce this more 
> "officially".
> (Note: if one opens the project with the new version, then old potku 
> cannot anymore open the same project. (to preserve the possibility for 
> previous version, open for example a copied project instead). The 
> configuration files are now JSON format and introduction of the energy 
> detector (addition to the TOF) have introduced new parameters, for 
> example. But the new version is otherways wayy ahead of the old 
> 2022/03/31 version, including also many speed and usability 
> improvements to the slab analysis side).
>
> mikko.
>
> ps. Our university web pages have just went through large refreshment, 
> and some "old" pages cannot be accessed at the moment, Potku page 
> included..
>
>
> --
> Mikko Laitinen, PhD, Docent
> Academy Research Fellow
> Department of Physics, Accelerator Laboratory
> ________________________________________________________
> Postal address: University of Jyväskylä,
> Department of Physics, P.O. Box 35, FI-40014, Finland
> Street address: Survontie 9 D, Ylistönrinne, Jyväskylä
> Work phone: +358 40 8054 113
> E-mail address: mikko.i.laitinen at jyu.fi
>
> ________________________________________
> From: potku-bounces at lists.jyu.fi <potku-bounces at lists.jyu.fi> on 
> behalf of Robert Frost <rob.frost at physics.uu.se>
> Sent: Wednesday, November 8, 2023 8:56 PM
> To: potku at lists.jyu.fi
> Subject: [POTKU] no observed ions in Potku simultion
>
> Hi,
>
> I'm currently trying to make use of the simulation tool in Potku, but 
> the number of "observed ions" simply remains zero (screenshot below 
> and also attached).
>
> Screenshots of all related setting are also included below (and attached).
>
> Any idea what I am doing wrong?
>
> Thanks,
> Rob
>
>
> [cid:part1.MkUxBdPx.0PguyRlK at physics.uu.se]
>
> [cid:part2.vDtaBxso.6uatLmkj at physics.uu.se][cid:part3.3TiaTmrf.QiKjpHa8 at physics.uu.se][cid:part4.dMj3EZ45.NrrWraD4 at physics.uu.se]
>
>
>
> --
> Robert Frost MEng PhD
> Researcher in the Ion-physics Group
> Division of Applied Nuclear Physics
> Department of Physics & Astronomy
> Uppsala University
> Sweden
> email: rob.frost at physics.uu.se<mailto:rob.frost at physics.uu.se>
> phone: +46 (0) 723411586
>
>
>
>
>
>
>
>
>
>
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