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

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Presentation on theme: "X-ray Absorption Spectroscopy at SESAME “BASEMA Status” Messaoud Harfouche Synchrotron-light for Experimental Science and Applications in the Middle East."— Presentation transcript:

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

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. 2

3 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’ ) Answers to Previous Questions and suggestions 3

4 A future upgrade of beamline to use KB focusing system to achieve 3x3  m 2 – 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  m 2 with a flux of 5 x 10 9 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 ) Answers to Previous Questions and suggestions 4

5 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 Answers to Previous Questions and suggestions 5

6 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 Answers to Previous Questions and suggestions 6

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) 7

8 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 8

9  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  m 2 is a good beam size for many applications. Users recommendations and wishes 9

10 BASEMA 10

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) 11

12 12 BASEMA

13 BASEMA Port D08 Booster Storage ring Beamline 13 by Adel Amro

14 Machine : 14 Can’t go to higher Energies due to the machine performances

15 Beamline Characteristics ParameterUnitValue Source (BM)T1.45 Hor. acceptancemrad3 Vert. acceptancemrad0.6 Energy rangekeV4 – 30 Energy resolution -~ Photon flux (S1)Ph/sec 2 x (8keV) Beam size (S1)mm 2 ~0.1 x 0.1 Beam size (S2) m2m2 8x10 Photon flux (S1)Ph/sec 5 x 10 9 (8keV) 15  Lower limit due to absorption of air in the EH  Higher limit due to machine limitation Energy range

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

17 Control racks Optics Hutch Control room Experimenta l Hutch Optics Hutch Control room Experimenta l Hutch Control racks Lab. Beamline Hutches NE W 17 OL D

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

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

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

21 Averaged rms values VCM VFM Beamline Optics 21

22 Beamline Optics Micro-roughness RMS distribution on VCM stripes PtSi 22

23 Micro-roughness RMS distribution on VFM stripes PtSi Beamline Optics 23

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

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

26 ElementTransmitted Power (W) Absorbed Power(W) Abs. Power Dens.(W/mm²) Prim slits Be 250 µm M1 mirror rst crystal (23°) ElementTransmitted Power (W) Absorbed Power(W) Abs. Power Dens.(W/mm²) Prim slits Be 250 µm M1 mirror rst crystal (23°) Heat load absorption and power density on VCM Si Pt 26

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

28 Beamline Optics DCM  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 28

29  Stepper motors Beamline Optics Tests on the DCM 29

30 Beamline Optics Tests on the DCM  Cooling System 30

31 Beamline Optics Tests on the DCM  Cooling System 31

32 Beamline Optics Tests on the DCM  Vacuum System 32

33 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 33

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 34

35 E ( keV ) Mirror angle ( mrad ) N (ph/s)  E (eV) Size ( H  V mm ) Div. ( H  V mrad ) 3 rd order 5 (a)3.2 mrad 2.4     10 7 (1.3X10 -5 ) 52.8 mrad 2.2     10 8 (6.0X10 -5 ) 82.8 mrad 2.8     10 5 (8.9X10 -8 ) mrad 1.8     10 3 (3.3X10 -9 ) E ( keV ) Mirror angle ( mrad ) N (ph/s)  E (eV) Size ( H  V mm ) Div. ( H  V mrad ) 3 rd order     10 4 (1.1X )          Optical properties at the sample position Si(111) crystal Si(311) crystal 35

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

37 Sec. slitsN ( ph/s )  E ( eV ) Size ( µm H  V )Div ( mrad H  V ) Fully open 1.4  x   50 µm4.9  x  1.12 Optical Element Distance (m) Demagn. S1 – VFM (P)2.92 VFM – S2 (q)0.581/10 S1– HFM (p) 3.181/6 HFM – S2 (q) 0.32 KB parameters from secondary source KB Focusing system Ray tracing simulation results 37

38 KB Focusing system Secondary source (S1 sample)Focused beam (S2 sample) 8x10  m 2 ~5x10 9 Ph/sec 38

39 Materials Costs (M$)  Interface (hutches and infrastructure) 0.50  Front End0.15  Beamline Optics0.49 o XBPM0.10 o Crystals for DCM0.04 o Modifications on the existing optics0.10 (if needed) o Focusing system (KB+microscope)0.25 (To be discussed)  Vacuum System0.03 Computing and Control System0.40  Hardware (PCs, VME, drivers,…) 0.3  Software and DAQ 0.1 Furniture End Station0.51  Tables (2)0.12  Detectors o ICs, diodes and gas mixing system0.04 o SDD (1)0.05 o Multi-element Ge detector0.30 (promises for 7e Ge detector S.H.) Total costs with focusing system 2.08 Total costs without focusing system (-0.25) 1.83 Estimated Costs 39

40 TaskStartEnd Conceptual Design Report (CDR)2011November, 2012 Technical Design Report Design Report Final Design Report December, 2012 July, 2013 Jun, 2013 November, 2014 Lead procurementDecember, 2014May, 2015 Components modifications and procurementJanuary, 2015September, 2015 InstallationMay, 2015October, 2015 Control Integrating and testingJun, 2015December, 2015 Commissioning (depending on machine)January 2016July, 2016 Proposals for expert usersApril, Accepting Expert UsersJuly, 2016October, 2016 Proposals for beamtime (all users)September 15, Users at bemllineJanuary, Estimated Time Schedule 40

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 41

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


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