Filter-Units
General infos
The filter control panel can be used to move in filters AND to calculate the transmission of the fundamental wavelength of the FEL and its 3rd harmonic.
The moving procedure is supervised by a protection system. First of all the fast shutter is closed before moving the filter wheel (to protect the filters during moving) and blocked till the movement is over. Then the fast shutter has to be opened again with the Fast shutter control button. It does not open automatically!
In addition the pulse energy and the number of bunches in the FEL is monitored. IF the radiation dose exceeds a certain limit the filters can not be moved into the beam. Then the beam has to be attenuated using the gas attenuator to a range where the filters can be used again. More info: JdddFilterProtection
Mounted filters, replacement in N2 box
- Filter History and mounted filters of FLASH1 and FLASH2: what filter was mounted at which motor position
- Replacement filters in N2 flow box
Filter transmission
- Transmission of filters calculated from CXRO; the Origin graphs now as pdf for and filter wheels
- : Transmission of filters as measured by PTB as pdf
- : Transmission of Nb, Zr, Al, Si Luxel filters measured between 2.5nm and 25nm by the PTB in comparison with CXRO data
- : Laurents transmissiont measurements for "Rohringer" Beamtime - shows deviations for Si !
Documentation of the filter protection in jddd
Data collection of FEL parameters and Filter damage
Filter material | Thickness[nm] | Wavelength [nm] | pulse energy [µJ] | # of Bunches | Apertures? | Integral dose (mJ) | Filter unit | survived? | date | Comments |
Al | 100 | 13 | 300 | 1 | 3mm | ~3 | BL wheel 2 | hours | Sept 2014 | Adrians beamtime |
Al | 198 | 13 | 1.8 | 401 | 3mm | ~0.7 | BL wheel 2 | ~10 minutes | August 2014 | only in combination with Nb 385nm on wheel 1, Attenuator with Xe at 5% transmission (0.15mbar), Industry beamtime |
Nb | 385 | 13 | 1.8 | 401 | 3mm | ~0.7 | BL wheel 1 | ~10 minutes | August 2014 | only in combination with Al 198nm on wheel 2, Attenuator with Xe at 5% transmission (0.15mbar), Industry beamtime |
Nb | 197 | 13 | 2.5 | 401 | 3mm | ~1 | BL wheel 2 | ~10 minutes | August 2014 | only in combination with Al 423 nm on wheel 1, Attenuator with Xe at 5% transmission (0.15mbar), Industry beamtime |
Al | 423 | 13 | 2.5 | 401 | 3mm | ~1 | BL wheel 2 | ~15 minutes | August 2014 | only in combination with Al 423nm on wheel 1, Attenuator with Xe at 5% transmission (0.15mbar), Industry beamtime |
Al | 101 | 13 | 2.5 | 401 | 3mm | ~1 | BL wheel 2 | ~15 minutes | August 2014 | only in combination with Al 423nm on wheel 1, Attenuator with Xe at 5% transmission (0.15mbar), Industry beamtime |
Al | 298 | 13 | 2.5 | 401 | 3mm | ~1 | BL wheel 2 | ~15 minutes | August 2014 | only in combination with Al 423nm on wheel 1, Attenuator with Xe at 5% transmission (0.15mbar), Industry beamtime |
C Al C | 500 | 13 | 2.5 | 401 | 3mm | ~1 | BL wheel 2 | ~15 minutes | August 2014 | only in combination with Al 423nm on wheel 1, Attenuator with Xe at 5% transmission (0.15mbar), Industry beamtime |
Al | 423 | 13 | 2.5 | 401 | 3mm | ~1 | BL wheel 1 | ~1 h | August 2014 | Industry beamtime, Attenuator with Xe at 5% transmission (0.15mbar) |
Al | 423 | 13 | 70 | 1 | 3mm | 0.07 | BL wheel 1 | ~1 h | August 2014 | Industry beamtime |
Al | 193 | 13 | 52 | 1 | 3mm | 0.05 | BL wheel 1 | ~1 h | August 2014 | Industry beamtime |
Al | 193 | 13 | 50-80 | 1 | 3mm, 5mm, 10mm | ~0.1 | BL wheel 1 | ~30min | August 2014 | Industry beamtime |
Si | 419 | 19 | 15-20 | 87 | 3mm | 1.3 | BL wheel 1 | 36h | June 2014 | Moshammer beamtime , ~ 70% of beam were absorbed! http://ttfinfo.desy.de/ExpHallelog/show.jsp?dir=/2014/24/13.06&pos=2014-06-13T17:17:44 |
Al | 400 | 19 | 15-20 | 87 | 3mm | 1.3 | BL wheel 1 | many h | June 2014 | Moshammer beamtime , ~ 70% of beam were absorbed! http://ttfinfo.desy.de/ExpHallelog/show.jsp?dir=/2014/24/13.06&pos=2014-06-13T17:56:57 |
Zr | 200 | 19 | 2-3 | 77 | 1mm | 0.2 | BL wheel 1 | few h | June 2014 | |
Al | 100 | 13 | 6-8 | 15 | 1mm ! | ~ 0.1 | BL | short ? - then BROKEN | Jan 2014 | |
Al | 200 | 4 | 180 | 1 | none, but 2-3 mm beam in the hall | ~ 0.2 | BL | yes, minutes | Dec 2013 | |
Al | 400 | 4 | 180 | 1 | none, but 2-3 mm beam in the hall | ~ 0.2 | BL | yes, minutes | Dec 2013 | |
Si3N4 | 350 | 4.3 | 180 | 1 | none, but 2-3 mm beam in the hall | ~ 0.2 | BL | yes, minutes | Dec 2013 | |
Al | 100 | 4.3 | 180 | 1 | none, but 2-3 mm beam in the hall | ~ 0.2 | BL | BROKEN | Dec 2013 | |
Si | 220 | 4.3 | 180 | 1 | none, but 2-3 mm beam in the hall | ~ 0.2 | BL | BROKEN | Dec 2013 | |
Zr | 220 | 4.3 | 180 | 1 | none, but 2-3 mm beam in the hall | ~ 0.2 | BL | BROKEN | Dec 2013 | |
Al | 100 | 6.8 | 80 | 30 | 3mm | 2.4 | BL | BROKEN | Mar 2011 |
