VUV-FEL User workshop, August 23-24, 2004

Transcription

1 Layout of the user facility Kai Tiedtke Kai Tiedtke, VUV-FEL User workshop, August 23-24, 2004

2 Kai Tiedtke, Outline Photon beam transport Layout of the experimental hall Beam distribution optics Monochromator/direct beamlines Time-schedule General infrastructure water, gases, power, comp-lan

3 Kai Tiedtke, Photon beam transport

4 Kai Tiedtke, FEL beamline Dipole beamline FEL beam Dipole radiation Beam dump ~20m to undulator section e - beam

5 Kai Tiedtke, Photon beam transport: (ultra-high vacuum and windowless) PETRA transfer tunnel ~20m to undulator section Photons First mirror chamber Experimental hall PETRA storage ring e - Dump Accelerator tunnel

6 Kai Tiedtke, gas filled attenuator (~15m, Ø: 100 mm) Differential pump units

7 Kai Tiedtke, Gas filled attenuator Controlled attenuation of FEL beam for nm Attenuation of 10-6 (depends on gas) Preserves beam attributes (coherence, statistics, spectrum, etc.) 1 0,01 N 2 Kr Xe P= 0.1 mbar Transmission 1E-4 1E-6 Calculated transmission of a 15m long gas cell 1E-8 1E Wavelength [nm]

8 Kai Tiedtke, Layout of the experimental hall

9 Layout of the user facility Kai Tiedtke, Klimaschrank Optical laser beamlines BL1 100 µm BL2 20 µm PG2 BL3 10 µm PG1 VUV Raman spectrometer Dipole radiation beamline Optical laser 30m to last dipole magnet Gas absorber High resol. PGM monochromator

10 Kai Tiedtke, FEL optics The FEL beam can be switched to five different end stations just by moving one or two plane mirrors Two experimental stations (PG1 & PG2) will be served by a high resolution plane grating monochromator Three experimental stations use the direct FEL beam They are equipped with toroidal mirror (BL1) and ellipsoidal mirror (BL2, BL3) Option for BL2 to use unfocused beam

11 Kai Tiedtke, Mirrors of direct beamlines The optics system has been designed to reduce the risk of damge due to high peak power Six grazing incidence plane mirrors/ one toroidal/two ellipsoidal (dimensions: 510x60x70) Silicon substrates High density carbon coatings Option for BL2 (unfocused): Ni coating for higher harmonics

12 Kai Tiedtke, Residual figure error of BL0-M1 Properties Specification Results Geometry Radius >20km R>230km Slope error tangential: 0.1 rms sagittal: 0.2 rms rms rms

13 Surface roughness (Microinterferometry at 8 random positions) Kai Tiedtke, HASYLAB@ Sq: 0.09 nm Properties Specification Results Surface roughness <0.5 nm rms nm rms

14 Kai Tiedtke, Mirror chambers of direct beamlines Only one type of mirror chamber to minimize effort for design, construction, and operation (a total of 9 chambers) External precise motion mechanism for the alignment Option to install one or two mirrors Cutaway view Mirrors Getter pumps Bellows Alignment system Granite block Flourescence Screen

15 Kai Tiedtke, Collimated plane grating monochromator M. Martins (University of Hamburg) et al., funded by BMBF

16 Kai Tiedtke, Simulation of the resolving power and the transmission for the 200 lines/mm grating

17 Kai Tiedtke, Simulation of the resolving power and the transmission for the 1200 lines/mm grating

18 VUV-Raman Spectrometer M. Rübhausen (University of Hamburg) et al., funded by BMBF Kai Tiedtke,

19 6 VUV-FEL Users Workshop Kai Tiedtke, Vacuum interface (BL1, BL2 and PG2) 500 vacuum chamber experiment differential pumping unit mirror chamber beamline The interface prevents the penetration of dust and hydrocarbons into the beamline vacuum.

20 Kai Tiedtke, FEL Beamlines / Time schedule Branch Commisioning Focusing optic Focus size (FWHM) [µm] Distance DPU* flange-focus [m] Nonmonochromatized BL1 end 2005 toroidal 100 ~1 BL2 04/2005 ellipsoidal BL3 end 2006 end 2005 ellipsoidal or KB optic unfocused 10 PGM Monochromator PG2 04/2005 toroidal 100x100 ~ 1 PG1 end 2006 elliptical KB 5x20 VUV-Raman Spectrometer 2007 mounted at PG1 DPU* = differential pumping unit

21 Kai Tiedtke, PG1 PG2 BL1 100 µm BL2 20 µm BL3 10 µm The near future (Note: this is only the 1:5 0 model!)

22 Kai Tiedtke, Radiation protection No interference between VUV-FEL and PETRA operation FEL beam distribution area is only control area except for FEL operation mode (=> prohibited area) Experimental area of VUV FEL hall is in general freely accessible

23 Kai Tiedtke, General infrastructure

24 General infrastructure Kai Tiedtke, preassembling area Klimaschrank Clean room

25 Kai Tiedtke, Preassembling area 30qm Clean room with class 100

26 Electric power and media Kai Tiedtke, 230V three phase current pump exhaust water N 2 compressed air He backflow

27 VUV-FEL Users Workshop Kai Tiedtke,

28 General infrastructure Kai Tiedtke, 1 st floor: Space for User office preassembling area Klimaschrank Clean room

29 Kai Tiedtke,

30 Kai Tiedtke, What users have to do before Beamtime (see HASYLAB Web pages) 4 weeks before your scheduled beamtime please send: Declaration of Substances and apparatus Possibly together with a copy of safety regulations on the handling of hazardous substances. You will find more detailed information ( gas handling, etc.) on the HASYLAB safety web page. List of all experimentalists with details of the expected length of stay ("Registration"). Request for the use of the chemistry laboratory at HASYLAB. to the HASYLAB secretaries' office.

31 Kai Tiedtke, The end.

32 Kai Tiedtke,