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.

CONTACT
  • Contact
    e-mail for all requests related to beamlines P65/P64


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 


0.5 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 motorised sample holder for up to 20 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
Hitachi ME4 SDD


       Energy resolution

200 eV at 5.6keV 


       Count rate


2 * 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


       Larch, Demeter, 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.