The OPAL Discussion Forum

[Nicole R Neveu <nneveu AT stanford.edu>]

Wei Hou,

 

Glad to hear things are going well.  Some quick notes:

• You can dump the loaded input distribution by using the option “WRITETOFILE = True,” in your distribution command.

• I.e. you can look at the distribution write out instead of step 0

The time column (clock) for ASTRA may need extra conversion.

• If I’m remembering correctly ….
• particles in ASTRA have a time relative to the reference particle in ASTRA
• OPAL has absolute time for all particles

ASTRA has several reference particles (usually) included in the distribution

• you can delete these for OPAL

 

I haven’t had time to look into this in detail yet, but those differences came to mind.

 

Thanks!

 

Nicole

 

From: <opal-request AT lists.psi.ch> on behalf of Wei Hou Tan <tanweihou AT outlook.com>
Reply-To: Wei Hou Tan <tanweihou AT outlook.com>
Date: Wednesday, February 12, 2020 at 11:17 AM
To: Nicole R Neveu <nneveu AT stanford.edu>
Cc: opal <opal AT lists.psi.ch>
Subject: Re: [Opal] Loading initial distribution from Astra

 

Hi Nicole,

 

I am doing fine here, Philippe is quite happy with OPAL and hence we decide to use it to cross check results from ASTRA, IMPACT-T, etc.

There was no error when I ran both OPAL and ASTRA, just that they both gave different distributions.

I suspect that something is wrong when I converted ASTRA distribution (particle.ini) to OPAL format (opal.ini) but I could not figure out yet.

Here I attach log files from ASTRA and OPAL for your reference.

 

Thanks.

 

Regards

Wei Hou

---

From: Nicole R Neveu <nneveu AT stanford.edu>
Sent: Thursday, February 13, 2020 2:44 AM
To: Wei Hou Tan <tanweihou AT outlook.com>
Cc: opal <opal AT lists.psi.ch>
Subject: Re: [Opal] Loading initial distribution from Astra

 

Hi Wei Hou,

 

I’m doing good, and you?

 

Also, could you please send your error message?

I probably won’t get to this today, but I’ll try to take a look soon.

I’m doing similar comparisons.

 

Thanks,

 

Nicole

 

From: Wei Hou Tan <tanweihou AT outlook.com>
Date: Wednesday, February 12, 2020 at 10:38 AM
To: Nicole R Neveu <nneveu AT stanford.edu>
Subject: Re: [Opal] Loading initial distribution from Astra

 

Hi Nicole,

 

How are you ?

Here I attach all related input files for both ASTRA and OPAL.

Thanks.

 

Regards

Wei Hou

---

From: Nicole R Neveu <nneveu AT stanford.edu>
Sent: Thursday, February 13, 2020 2:01 AM
To: Wei Hou Tan <tanweihou AT outlook.com>; opal <opal AT lists.psi.ch>
Subject: Re: [Opal] Loading initial distribution from Astra

 

Hi Wei-Hou,

 

Can you please send error file / related input files.

 

Thanks,

 

Nicole

 

From: <opal-request AT lists.psi.ch> on behalf of Wei Hou Tan <tanweihou AT outlook.com>
Reply-To: Wei Hou Tan <tanweihou AT outlook.com>
Date: Wednesday, February 12, 2020 at 9:40 AM
To: opal <opal AT lists.psi.ch>
Subject: [Opal] Loading initial distribution from Astra

 

Guten Tag,

 

This is Wei-Hou TAN, graduate student from the Northern Illinois University working with Prof. Philippe Piot.

 

I would like to use my ASTRA initial distribution in OPAL to compare both ASTRA and OPAL simulation results.

However, I could not make it work.

The step0 distribution in OPAL hdf5 file is different from that of in ASTRA, it is shorter.

 

Here is what I did:

I generated my ASTRA distribution in the following format, then rearranged columns in red circles to produce correct format for OPAL.

Then in OPAL, I wrote the following:

Dist: DISTRIBUTION, TYPE = FROMFILE,

        FNAME = "opal.ini",

        EMISSIONMODEL = ASTRA,

        EMITTED = True;  

 

Is it correct ?

Thank you.

 

Regards

Wei Hou