The OPAL Discussion Forum

[Christof Metzger-Kraus <christof.j.kraus AT gmail.com>]

Dear all,

another (working) possibility for cases like Bettinas is to use file names that contain an integer such as in ez_normalizedcathodpos_1.txt, ez_normalizedcathodpos_2.txt, ..., ez_normalizedcathodpos_10.txt. You then define a design variable named e.g. fnum. The field maps can then be chose in the template file like this:

FNAME="ez_normalizedcathodpos__fnum_.txt".

For a better understanding I have attached Bettinas example to the e-mail.

Best,

Christof

On Thu, Jul 11, 2019 at 1:39 PM Frey Matthias (PSI) <matthias.frey AT psi.ch> wrote:

Dear Bettina

> Does anybody know how to run this?

That's true, the sampler does not accept string input. Since there are only 3 possibilities you could do an if-else in the tmpl-file and

sample an integer.

> Are changes to the sampler software necessary?

Yes. But I think it would be a small change.

Best,

Matthias

---

Von: opal-request AT lists.psi.ch [opal-request AT lists.psi.ch]" im Auftrag von "Kuske, Bettina [bettina.kuske AT helmholtz-berlin.de]
Gesendet: Donnerstag, 11. Juli 2019 13:22
An: opal AT lists.psi.ch
Betreff: [Opal] sampler input

Dear all,

 

I would like to use the sampler for our gun / diagnostic line.

As the cathode position and field flatness are ambiguous, I need to

vary also the gun fieldfile.

 

Lower/Upperbounds accept only numbers, not strings.

I cannot skip these parameters, nor enter ‘dummy’ numbers 1 to 3

while reading the 3 filenames from a file.

 

Using something like 1:“filename“, leads to a ‚1‘ in the input, the string is ignored.

 

To try different filenames is essential for these studies.

Does anybody know how to run this?

Are changes to the sampler software necessary?

 

I greatly appreciate your help!

 

Bettina

 

---

Helmholtz-Zentrum Berlin für Materialien und Energie GmbH

Mitglied der Hermann von Helmholtz-Gemeinschaft Deutscher Forschungszentren e.V.

Aufsichtsrat: Vorsitzender Dr. Volkmar Dietz, stv. Vorsitzende Dr. Jutta Koch-Unterseher
Geschäftsführung: Prof. Dr. Bernd Rech (Sprecher), Prof. Dr. Jan Lüning, Thomas Frederking

Sitz Berlin, AG Charlottenburg, 89 HRB 5583

Postadresse:
Hahn-Meitner-Platz 1
D-14109 Berlin

Attachment: GunField_sampler.in
Description: Binary data

Attachment: GunField.tmpl
Description: Binary data