PRELIMINARY TIME SCHEDULE start of commissioning start of user operation April 2000 July plane grating 300 / 1000 lines per mm M 2 M 3

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1 M 1 March 2003 ID15-2 U49/2-PGM-2 (-Cottbus) BL-phone: 3425 CONTACT PERSON building room phone fax P.Hoffmann () *) PantaRhei hoffman@tu-cottbus.de D.Schmeißer () *) PantaRhei dsch@tu-cottbus.de *) Cottbus, Lehrstuhl Angewandte Physik-II, Universitätsplatz 3-4, Cottbus PRELIMINARY TIME SCHEDULE start of commissioning start of user operation April 2000 July 2000 OPTICAL LAY-OUT (schematic) top view M 1 M G plane grating 300 / 1000 lines per mm M PGM-U49/2 side view Undulator cylindrical U49 mirror wall plane mirror torroidal mirror distance between elements (mm) distance to source [mm] exit slit sample premonochromator optics M1 : cylindrical mirror, 2Θ=176, platinum coated, water cooled. monochromator principle: plane grating monochromator with collimated light optical components: M2: plane mirror, platinum coated, water cooled G1,2: plane gratings, 1000 and 300 lines per mm, water cooled M3: cylindrical mirror, 2Θ=176, Gold coated, vertical focusing on exit slit E [ev] d[1/mm] R [mm] coating G G exit slit slit setting: µm postmonochromator optics None reference [1] K.J.S Sawhney, F. Senf, M. Scheer, F. Schäfers, J. Bahrdt, A. Gaupp, and W. Gudat, Nucl. Instr. Meth. A, 390 (1997) Page 1 of 6

2 PERFORMANCE DATA: FLUX Flux Photons / Sec 100mA 0.1% BW Harmonic ( calculated for C ff =2,25) 3. Harmonic ( calculated for C ff =2,25) 5. Harmonic ( calculated for C ff =2,25) Monochromator settings: - Aperture: 2,0 2,0mm - Grating: 1000l/mm - C ff =3,0 - Exit slit: 140µm Photon Energy [ev] Flux curve for with 1000 l/mm grating between 85eV and 1450eV for the 1 st, 3 rd, and 5 th harmonic of the Undulator. Bold lines are measured data and fine lines are calculated data (from Batchelor at al.: BESSY-Jahresbericht 1997). PERFORMANCE DATA: Resolution versus photon energy Gauß broadening [ev] 400m 300m 200m 100m Exit Slit setting : 10 µm 20 µm 50 µm 100 µm 140 µm calculated Photon Energy [ev] Gauß broadening of the Monochromator (Grating: 1000 l/mm) plotted versus Photo Energy. The Gauß broadening was measured at three different photon energies using three gas absorption thresholds. The calculated resolution (c ff =2.2 / slit width equal to source image size) is given as straight line. Page 2 of 6

3 PERFORMANCE DATA: Resolution versus exit slit setting Resolution [E/ E] Resolution at eV (Argon) eV (Nitrogen) eV (Neon) Exit Slit setting [µm] Resolution of the Monochromator (Grating: 1000 l/mm) plotted versus Exit Slit setting. The resolution was calculated from the measured Gauß broadening. PERFORMANCE DATA: 2 nd order suppression vs. photon energy 2 nd Order Percentage of 1 st Order 14,0% 12,0% 10,0% 8,0% 6,0% 4,0% 2,0% Argon Nitrogen Neon 0,0% Photon Energy [ev] Suppression of the 2 nd order (Grating: 1000 l/mm) measured for c ff =3.0 at 3 different photon energies using gas absorption. Page 3 of 6

4 PERFORMANCE DATA: 2 nd order suppression vs. c ff value 40% 2 nd Order Percentage of 1 st Order 35% 30% 25% 20% 15% 10% 5% 0% c ff Value Suppression of the 2 nd order (Grating: 1000 l/mm) measured for different c ff -values at the N1s- gas absorption at 400.9eV with a fixed Undulator gap of 36.05mm. PERFORMANCE DATA: Stability of the (nominal) photon energy Deviation of KE(E F ) from nominal photon energy [ev] 0,10 0,08 0,06 0,04 0,02 0,00-0,02-0,04-0,06-0,08 Fermi-edge position minus monochromator setting -0, (nominal) photon energy [ev] Deviation of the nominal photon energy and the supplied photon energy (Grating: 1000 l/mm). It should be noted that this deviations shows the sum of the errors made by the monochromator and the analyser!{photon energy set with U49/2-PGM (140µm exit slit / grating 1000 l/mm); Au-Fermi edge measured with PHOIBOS-analyser of the SoLiAS experimental station (5eV pass energy)} Page 4 of 6

5 PERFORMANCE DATA: Spot size spot size at experiment: ~500 µm (hor.) x µm (ver.) (dependent on slit setting) {measured vertical size: 126µm (FWHM) at CFF=4.0, exit slit = 140µm} TECHNICAL REFERENCE: Floor plan plan view Aperture Unit Exit Slit 800mm 860mm 1000mm 2600mm 3400mm Experiment Area >4000mm elevation view 860mm Page 5 of 6

6 TECHNICAL REFERENCE: Geometrical boundary conditions experimental area see Floor Plan / plan view last valve focus position focus height above floor beam orientation DN 35 CF window valve 860mm from last valve 1415 mm horizontal TECHNICAL REFERENCE: Vacuum requirements max. pressure <5 x 10-9 mbar at last valve, live zero point signal for interlock oil free vacuum system needed TECHNICAL REFERENCE: Infrastructure measurement setup {please ask Cottbus contact person what equipment is available} electrical power supplies demineralized cooling water pressurised air oilfree exhaust line He-recycling system computer computer network Standard equipment : electron Analyser EA125 (OMICRON) equipped with X-Ray Source and He-Lamp / Photoemission-Electronmicroscope / Preparation chamber / Look 220 V, 380 V max. 44 kva closed system, forerun 30 C / 10 bar, return run 42 C / 2 bar 8 bar not for poisonous gases! installed available, Windows98-PC for data evaluation available TECHNICAL REFERENCE: Data aquisition control system: Standard ID-monochromator control system (VME) data-acquisition computer data-acquisition software remote-control Personal Computer, measurement bus-extension, OS/2-operating system EMP II V24-serial port, AMC-protocol CAN-bus, CAN-protocol (in preparation) Page 6 of 6