FLASH2 mirror protection system

Version 8.1 by sndueste on 2023/02/28 11:37

In order to make sure that the mirrors are not damaged by short wavelength radiation a protection system takes care.  The system is realized in combination of a server and jddd warning panels.

There are 2 mirror protection servers ( one for the 2 mirrors in the tunnel and one for the experimental hall)


image2020-9-25_17-12-45.png image2021-2-10_18-8-7.png


The server checks that for the set wavelength the coating of the mirrors is appropriate. IF NOT the tunnel protection server will close PS1 and the hall protection server will close PS2. The closing is combined with a warning indicating the problem.


If everything is set properly and the possible wavelength is  < 5.5 nm  (checked by FL1 electron energy) this will be indicated in the tunnel view

(the indicator if the protection is set is always shown)

image2021-2-10_18-4-17.png


If the protection server is not active this will be indicated when PS1 is closed image2021-2-10_17-55-57.png

and even more if it is openimage2021-2-10_17-54-19.png

If the protection server, wavelength server or mirror moving server is unavailable or has some errors the messageimage2021-2-10_17-51-59.png   will be displayed. IN the right lower corner it also shows the reason. clicking on the warning one gets to the protection overview:


image2021-2-10_18-6-39.png


Opening PS1:

to prevent opening PS1 if the mirrors are not save there is also some logic behind the open button

The "open PS1" button opens a new window , which should look like this: image2021-4-13_16-38-3.png


In case something is not o.k. there are possible warnings: 

image2021-4-13_16-39-35.png  image2021-4-13_16-40-3.png image2021-4-13_16-40-46.png  image2021-4-13_16-41-41.png



Expert stuff:

FLASH.UTIL/MIRROR.PROTECTION/FL2.HALL/ACTION indicates actions the server will do, 0=ok, >0 will be close

This also works if the  absorber is still closed and is used in the jddd warnings

0 = ok
1 = closing absorbler
2 = absorber already closed
3 = absorber control disabled



If parameters like TTF2.FEEDBACK/FL2.WAVELENGTHCONTROL/FLASH2/WAVELENGTH.USED  are not readable  → generate warning


warning conditions:

2021-02-10 17_48_21-XFCE.png


general considerations (by Sören)

* Lese Wellenlaenge, Absorber Status
  - Wenn nicht lesbar, setze remote-error, aber laufe mit den letzen bekannten Werten weiter!

* Test ob wir auf einer gefaerdeten Beamline (nur Halle) stehen
  - Wenn nicht, ueberspringe alle nachfolgenden Tests

* Fuer alle aktivierten Spiegel, teste ob die Wellenlaenge gefaehrlich ist
  - Wenn ja, schliesse den Absorber (aber nur wenn Absorber-Controll erlaubt ist)

Es gibt zwei Instanzen des Servers, einer fuer die Tunel Section und einen fuer die Halle.

In der Halle testen wir nur wenn wir __nicht__ auf der Center-Beamline stehen (FL26 oder FL22, FL21!?)