Unified Data Sheet

P65 - EXAFS Beamline

P65 is dedicated to the majority of EXAFS experiments which do not require extremely high brilliance, photon flux or beamsizes below 1 mm2. This includes most operando experiments on catalysts, material sciences and geo- and environmental chemistry. The energy range covers 4 keV - 44 keV.

 


GENERAL SPECIFICATIONS


Techniques available


EXAFS, XANES


Photon source


11 periods undulator


Period

Number of periods

Max power


32.8 mm

11



Source brilliance 


5x10 16 ph /s / 0.1% bw / mA    (max. 100mA)


Available polarisation


linear horizontal


Energy range 


4 keV - 44 keV


Beamline energy resolution


deltaE/E = 1.4 x 10-4 resp. 0.6 x 10-4


Max flux ON SAMPLE

2x1012 ph/s at 8.9 keV
(calculated, tuned undulator)


Spot size ON SAMPLE 


1 x 1 mm2


Sample type


any

 

OPTICS

Type



Water cooled Double Crystal Monochromator


Energy range


4 keV - 44 keV


Resolving power

E/ΔE : 1x104 - 2x104


Available reflections

Si111 and Si311


       Type



       Mirror 1 and 2


Coating

Silicon
Rhodium
Platin

Energy Range

4-44 keV

Usage

Harmonic rejection (4 keV - 44 keV)
Reduce power load density on 1st DCM crystal


        



       ENDSTATION


XAFS

Experimental Table

Breadboard with X95 rail

Beam height over rail 

28cm

Sample environment 

Vacuum sample cross with standard motorized sample holder for 5 samples
He cryostat with sample cell and He exchange gas, T range 4K - 290K, motorized sample holder for 4 samples
Space for user equipment

DETECTOR(S)

Detection modes
Transmission 

yes

Refraction   

no

Fluorescence           

yes

Total electron yield

no

Grazing incidence angle    

yes



Point Detector(s)


Type 


 Ion Chambers

energy resolution 
 none
count rate 


linear up to 1012 s-1  


Beam Size   


given by slits


  Typical collection time


30 s - 300 s per EXAFS scan

Fluorescence Detector


       Type

Canberra 7 element 


       Energy resolution

250 eV at 5.6keV 


       Count rate


105 s-1 per element 


2θ range 


fixed at 90┬░


Typical collection time per point


0.1 s - 5 s

 

CONTROL/DATA ANALYSIS

Software type


       Sardana, Tango

Data output type


       Spectra, parameters such as temp., press, etc.


       Data output


       ASCII, HDF5/NEXUS

Software(s) for quantitative analysis


       Athena, Artemis, FEFF
, Viper


        



       SUPPORT LAB



       A sample preparation lab equipped with a fume hood and a glove box is adjacent to the control hutch. An analytical balance and a hydraulic pellet press is available inside and outside the glove box.