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[Opal] String variable for aperture

From: Simon Friederich <s.friederich AT uni-mainz.de>
To: <opal AT lists.psi.ch>
Subject: [Opal] String variable for aperture
Date: Wed, 1 Apr 2020 13:26:27 +0200
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Organization: Institut für Kernphysik Mainz

Dear all,

As we have changing apertures throughout our beamline I'd really like to use string variables but I don't get the correct syntax. I want something like:

STRING apert1 = "circle(0.015)"
STRING apert2 = "circle(0.030)"

drift1: DRIFT, ELEMEDGE=0.5, APERTURE=apert1, L=0.5;
drift2: DRIFT, ELEMEDGE=1, APERTURE=apert2, L=0.5;

But the error appears
Error> *** User error detected by function "OpalElement::getApert()"
Error> Unknown aperture type 'APERT1'.
Error> Unknown aperture type 'APERT1'.

Do I miss something?

Best regards
Simon

P.S.: I know this workaround does it
REAL napert1 = 0.015;
REAL napert2 = 0.030;

drift1: DRIFT, ELEMEDGE=0.5, APERTURE="circle(" & STRING(napert1) & ")", L=0.5;
drift1: DRIFT, ELEMEDGE=1, APERTURE="circle(" & STRING(napert2) & ")", L=0.5;

But maybe there is a better way to do it.

-- 
------------------------------------
Dr. Simon Friederich
Helmholtz-Institut Mainz
Kollaboration B / ACID
Johannes Gutenberg-Universität Mainz
Staudingerweg 18
55128 Mainz, Deutschland

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

[Opal] String variable for aperture, Simon Friederich, 04/01/2020
- Re: [Opal] String variable for aperture, Christof Metzger-Kraus, 04/01/2020
- Re: [Opal] String variable for aperture, Snuverink Jochem (PSI), 04/01/2020