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X-ray Absorption Spectroscopy at SESAME “BASEMA Status”

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Presentation on theme: "X-ray Absorption Spectroscopy at SESAME “BASEMA Status”"— Presentation transcript:

1 X-ray Absorption Spectroscopy at SESAME “BASEMA Status”
Synchrotron-light for Experimental Science and Applications in the Middle East   X-ray Absorption Spectroscopy at SESAME “BASEMA Status” Messaoud Harfouche

2 Answers to Previous Questions and suggestions
What is the vision for BASEMA BL Focus on the XAFS techniques (XANES, EXAFS, XRF, XRD) Need to meet user demands Beamline scientist can propose different techniques that can be combined with XAS RAMAN is the widely used technique and maybe the cheapest XES, HERFD, RIXS are the most advanced techniques but very expensive and needs special design (can’t buy as a complete system) Need multitude of bent crystals (larger is the number better are the results) Need different type of crystals to cover all the energy regions Priority should be given to build a strong XAS user community Need to connect with universities in the region (not that easy) SESAME should offer joint positions with universities (home universities ) to beamline scientists Sign MoUs with universities and research institutions …….. Need to encourage scientists to develop their own research and allow collaborations among the members and other countries.

3 Answers to Previous Questions and suggestions
Modify the DCM to use MCM & Easy exchange by users The DCM doesn’t allow motorized crystal exchange  lots of time to change the crystals  need mechanical & vacuum technicians Gain in flux but loss in resolution  can’t be used for most of EXAFS measurements Flux on the sample is good enough even at higher energies - ~30 keV- if good detectors are used. Cost of such a modification is very high (according to Ricardo Seniorato Bruker ‘former Accel’)

4 Answers to Previous Questions and suggestions
A future upgrade of beamline to use KB focusing system to achieve 3x3 mm2 Ray tracing calculations already performed Beam size from the source is too large  difficult to focus Smallest beam size that can be achieved is 8 x 10 mm2 with a flux of 5 x 109 ph/sec at 8 keV The option of short beamline is excluded need a small intermediate source point with small demagnification Smaller is the beam size - lower is the flux on the sample Project for a micro-focusing beamline on insertion device (Undulator) can be proposed for phase II beamlines (to be proposed by potential users)

5 Answers to Previous Questions and suggestions
What makes a good beamline? Stability and Low noise are key factors! Beamline scientist totally agree on this proposition It is a practical matter rather than calculations and design issue Need to minimize the number of motorization and disconnect the non used ones. Find a system that allows to disconnect a motor remotely and make it passive as soon as it is not used. Find the adequate solution for internal and external cooling system. Use insolating material between the ground and girders for the optics components Other tricks can be collected from experts – starting from SAC/BAC

6 Answers to Previous Questions and suggestions
Being competitive by having reliable and impressive software data acquisition and control software A sketch (Mock-up) of the data acquisition software is already done See the demonstration version Will be discussed with control group Need a very good physicist who is a good programmer or a very good programmer and good in physics. Data reduction and analysis Many software are developed Ifeffit , WInXAS, XAFS, EXAFS pour le mac, PyMCA, fit2D, Match, etc. Some have active mailing list and provide help for the users. Users are free to use there own software

7 Other Comments Opening of the boxes from ESRF
On going (with many delays) Monochromator has been opened and inspected in presence of an expert (A. Simionovici) Visual inspection (internal, external) Testing of stepper motors, cooling and vacuum system Could not test all the motors and signals (No control hardware) Other beamline components are in testing phase XBPM, Slits, Wire monitor The opening of the VCM mirror is delayed until receiving the second mirror VFM Metrology tests are already done at ESRF (thanks to Amparo Vivo) Need an expert who worked with ZEISS mirror mechanisms (Eric Detonna, ESRF)

8 Budget estimation of the control system
Other Comments Budget estimation of the control system Discussed with 3 beamline scientists from SOLEIL SAMBA, DiFabs, ODE The average construction budget for a beamline at SOLEIL was given by the control group (Pascale Betinelli + Yves-Marie Abevin) Will be shown in details at the end of this presentation Annual upgrade budget Not needed at this stage of the construction

9 Users recommendations and wishes
Raman technique will be a good technique to be combined with XAFS, XRF and XRD Need for a cryojet or cryostat for biological and some environmental samples. Needs for users will be submitted as proposal through EUC or directly to BL scientist Should focus more on building the users community which leads to scientific collaborations between users A large beam is needed for bulk measurements and 10x10 mm2 is a good beam size for many applications.

10 BASEMA

11 Current Status of BASEMA
CDR has been written and ready to be reviewed TDR has been started 3D drawing of all the components is ongoing (Akrum) Inspecting, testing and documenting the optics components Research vision for the beamline (preparing students, collaborations)

12 BASEMA

13 BASEMA Port D08 by Adel Amro Booster Storage ring Beamline

14 Can’t go to higher Energies due to the machine performances
ESRF (100 mA) just to have a good comparaison Can’t go to higher Energies due to the machine performances

15 Beamline Characteristics
Parameter Unit Value Source (BM) T 1.45 Hor. acceptance mrad 3 Vert. acceptance 0.6 Energy range keV 4 – 30 Energy resolution - ~ 10-4 Photon flux (S1) Ph/sec 2x1012 (8keV) Beam size (S1) mm2 ~0.1 x 0.1 Beam size (S2) 8x10 5x109 (8keV) Energy range Lower limit due to absorption of air in the EH Higher limit due to machine limitation

16 Spectral energy range (~4 –30 keV)
: K- edge : L- edge : Difficult It will be hard to probe some elements at very lower concentrations

17 OLD NEW Beamline Hutches Control racks Control racks
Experimental Hutch Control room Lab. Control racks Optics Hutch Control racks Optics Hutch Control room Experimental Hutch NEW

18 Hutches & Optics Layout
Control racks Optics Hutch Control room Experimental Hutch

19 Beamline Optics VCM VFM Still at ESRF: Arrived at SESAME:
to be delivered with BM16 comp. Arrived at SESAME: will be opened once VCM arrived

20 Beamline Optics Surface Roughness
13 points evenly spaced by 50.8mm are measured on each strip

21 Beamline Optics Averaged rms values VCM VFM

22 Beamline Optics Micro-roughness RMS distribution on VCM stripes Pt Si

23 Beamline Optics Micro-roughness RMS distribution on VFM stripes Pt Si

24 LTP measurement VCM (Slope error)
Beamline Optics LTP measurement VCM (Slope error) Slope errors correspond to residuals to the best cylinder Three parallel traces spaced by 15 mm are measured on each stripe Si Pt bender performances were not checked

25 LTP measurement VFM (Slope error)
Beamline Optics LTP measurement VFM (Slope error) Slope errors correspond to residuals to the best cylinder Three parallel traces spaced by 15 mm are measured on each stripe Si Pt bender performances were not checked

26 Si Pt Heat load absorption and power density on VCM Element
Transmitted Power (W) Absorbed Power(W) Abs. Power Dens.(W/mm²) Prim slits 108.8 - Be 250 µm 78.1 30.7 0.17 M1 mirror 33.6 26.0 0.0009 1rst crystal (23°) 0.003 0.11 Si Element Transmitted Power (W) Absorbed Power(W) Abs. Power Dens.(W/mm²) Prim slits 108.8 - Be 250 µm 78.1 30.7 0.17 M1 mirror 51.9 7.6 1rst crystal (23°) 0.003 0.18 Pt

27 Thermoelastic calculations (FE)
Beamline Optics Power density calculated on the surface of the Si coated stripe of the VCM Thermoelastic calculations (FE) Without cooling With cooling

28 Beamline Optics DCM Discussions and decisions: ROBL DCM at ESRF
Arrived to SESAME Opened in presence of an expert (A. Simionovici) Discussions and decisions: Use the current set up of cooling system for whole period of commissioning Mount the bender for the second crystal once we have beam through optics to experimental hutch

29 Beamline Optics Tests on the DCM Stepper motors

30 Beamline Optics Tests on the DCM Cooling System

31 Beamline Optics Tests on the DCM Cooling System

32 Beamline Optics Tests on the DCM Vacuum System

33 No controller at SESAME
Beamline Optics Problems encountered Vertical motors can’t be mounted (need to be fixed on the floor) Some Controllers still at ESRF for pico- and servo-motors No controller at SESAME Drops were observed on the first crystal Contacted optics groups at ESRF, APS Need to find a way to clean them

34 Beamline Optics Other Components
All the components from ESRF were unpacked Except the VCM Test is ongoing for the motors and motor controllers Cooling and vacuum will follow soon Tested components will be covered and stored in the Lab. Primary alignment of the components will be done at the end

35 Optical properties at the sample position
Si(111) crystal E (keV) Mirror angle (mrad) N (ph/s) E (eV) Size ( HV mm) Div. (HV mrad) 3rd order 5 (a) 3.2 mrad 2.41012 0.63 0.550.25 2.910.28 3.1107 (1.3X10-5) 5 2.8 mrad 2.21012 0.64 0.550.24 2.920.25 1.3108 (6.0X10-5) 8 2.81012 1.07 0.560.25 2.910.25 2.5105(8.9X10-8) 12 2.2 mrad 1.81012 1.83 2.910.20 6.0103(3.3X10-9) Si(311) crystal E (keV) Mirror angle (mrad) N (ph/s) DE (eV) Size (HV mm) Div. (HV mrad) 3rd order 14 2.8 2.41011 0.92 0.540.24 2.910.25 2.7104 (1.1X10-7) 18 1.41011 1.49 0.540.23 2.850.24 - 24 4.51010 2.66 0.540.25 2.700.24 30 2.2 1.71010 4.22 0.560.25 2.500.19

36 Optical properties at the sample position
Number of photons on the sample (S1) without focusing system (KB)

37 KB Focusing system Ray tracing simulation results
KB parameters from secondary source Optical Element Distance (m) Demagn. S1 – VFM (P) 2.92 VFM – S2 (q) 0.58 1/10 S1– HFM (p) 3.18 1/6 HFM – S2 (q) 0.32 Ray tracing simulation results Sec. slits N (ph/s) DE (eV) Size (µm HV) Div (mrad HV) Fully open 1.41012 1.06 54 x 23 2.231.18 10050 µm 4.9109 1.04 7.5x9.7 2.101.12

38 KB Focusing system 8x10 mm2 ~5x109 Ph/sec Secondary source (S1 sample)
Focused beam (S2 sample) 8x10 mm2 ~5x109 Ph/sec

39 Estimated Costs Materials Costs (M$)
Interface (hutches and infrastructure) Front End Beamline Optics XBPM Crystals for DCM Modifications on the existing optics (if needed) Focusing system (KB+microscope) (To be discussed) Vacuum System Computing and Control System Hardware (PCs, VME, drivers,…) Software and DAQ Furniture End Station Tables (2) Detectors ICs, diodes and gas mixing system 0.04 SDD (1) Multi-element Ge detector (promises for 7e Ge detector S.H.) Total costs with focusing system Total costs without focusing system (-0.25)

40 Estimated Time Schedule
Task Start End Conceptual Design Report (CDR) 2011 November, 2012 Technical Design Report Design Report Final Design Report December, 2012 July, 2013 Jun, 2013 November, 2014 Lead procurement December, 2014 May, 2015 Components modifications and procurement January, 2015 September, 2015 Installation October, 2015 Control Integrating and testing Jun, 2015 December, 2015 Commissioning (depending on machine) January 2016 July, 2016 Proposals for expert users April, 2016 - Accepting Expert Users October, 2016 Proposals for beamtime (all users) September 15, 2016 Users at bemlline January, 2017

41 Other Activities IAEA Coordinated Research Project (2 proposals)
Adsorption and mobility of heavy metals in soils in the vicinity of Jordanian- and Yarmouk- rivers (SESAME project) Antimony as an element with environmental concern and its pollution in Mongolia collaboration project between SESAME, Jordan and The Institute of Chemistry and Chemical Technology, Mongolia Accepted proposal for joint SESAME/ICTP School Advanced School on Synchrotron Techniques in Environmental Scientific projects SESAME-ICTP Co-supervising a Master Student from Al-Quds University Upgrade of BASEMA “the XAFS/XRF Beamline at SESAME” and application to a scientific case Co-supervising a Master Student from Jordanian Uniersity Heavy metals in the vicinity of Jordanian and Yermok rivers soils

42 Acknowledgement SESAME Staff A. Amro, T. Abu Hanieh, Y. Moumani,
Andreas Scheinost (ROBL, ESRF) Amparo Vivo (metrology Lab., ESRF) Alexander Simionovici (Univ. Josef Fourier and ESRF) Thiery Moreno (SOLEIL, France) SESAME Staff A. Amro, T. Abu Hanieh, Y. Moumani, F. Al-Omari, A. Attyeh, M. Shehab M. Al-Najdawi, S. Budair, O. Noor, M. Al-khalili etc.


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