Mitglied der Helmholtz-Gemeinschaft Forschungszentrum Juelich FZJ GEORGIAN

Mitglied der Helmholtz-Gemeinschaft Forschungszentrum Juelich / FZJ GEORGIAN Technical Universuty (GTU) MALKHAZ JABUA 1 st course Ph. D student of GTU (Supervisors Prof. L. Imnaishvili) Prof. D. Gotta READOUT UPGRADE OF THE JUELICH X-ray DETECTOR October 9, 2008 | Andro Kacharava (JCHP/IKP, FZ-Jülich) Georgian-German school and workshop in Basic Science 10. 08. 2012 TBILISI, GEORGIA

Structure of Presentation General overview of what I do Exeriment I’m involved at Forschungszentrum What I did and achieved during my stay at Forschungszentrum (Master Thesis) Activities planned in nearest future My expectations MALKHAZ JABUA 10/08/2012 | Slide 2

Motivation at IKP/ FZJ v Exploring the details of atomic shells v Measurement of X-ray energies from various samples at ultimate resolution v One of the target objects - Barium Compounds 90 e. V Ø 5. 8 ke. V Metallic Barium Lγ 2, 5 420 me. V Ø Barium vapour 1 ch=147 me. V Fig. 1 Barium Energy Spectrum MALKHAZ JABUA 10/08/2012 | Slide 3

Shortly about the X-rays Wavelength 0. 01 - 10 nm Frequency 3· 1016 Hz - 3· 1031 Hz Energy 120 e. V - 120 ke. V USAGE: MEDICAL SPHERE: Ø Imaging, diagnosis, treatment Ø Computer tomography Ø Radiotherapy INDUSTRY : Ø Airport security control Ø Baggage quick check X-RAY CRYSTALLOGRAPHY : Fig. 2 X-ray fluorescence Photon energy E= h · f Ø Studing the structure of crystals or molecules MALKHAZ JABUA 10/08/2012 | Slide 4

How we reach the ultimate precision of X-ray ENERGY measurement? First order AB=BC=d·sin θB Bragg Law Fig. 3 Crystal Lattice nλ=2 d·sinθB E=hc/λ MALKHAZ JABUA 10/08/2012 | Slide 5

Spherically bent crystal spectrometers Advantages: v High efficiency of X-ray detection v Possibility to measure X-rays in an energy interval simultaneously v X-rays reflected from the crystal are focused on detector’s sensitive surface at high precision Focal Condition Fig. 4 Scheme of spherically bent crystal spectrometer Y=RC·sinθB MALKHAZ JABUA 10/08/2012 | Slide 6

Juelich Spectrometer Fig. 5 Juelich Spectrometer MALKHAZ JABUA 10/08/2012 | Slide 7

Working Principle of CCD detector Charge created by photo effect Fig. 6 Detector operates as - „Bucket Brigade“. MALKHAZ JABUA 10/08/2012 | Slide 8

Detector Construction 2 x 3 CCD array Sensitive area 24 mm x 24 mm per chip 600 x 600 square pixels of size 40 µm per chip Detector thickness - 350 µm Fig. 7 Detector Construction. MALKHAZ JABUA 10/08/2012 | Slide 9

Detector Setup Cooling dewar of detector. Cryostat valve. Turbomolecular pump. Cooling circuit. Inner board for the digital signals distribution. Aluminum shield of detector. Detector chips. Outer board for the digital signals distribution. Detector support. Temperature Isolators. Temperature distribution inner board. Fig. 8 Detector System. MALKHAZ JABUA 10/08/2012 | Slide 10

An old readout system that we had when I came to FZJ Temperature Controller T. C. Analog signal amplifier L 1 -L 9 R 1 -R 9 Temperatures Temperature Acquisition Device ADC Clock driver / multiplexor P/A T. A. PC 1 4 2 5 P/A 3 6 Drive card 2 P/A Drive card 1 P/A Vacuum Cryostat Weak Point Source of disadvantages Fig. 9 An old readout system structure MALKHAZ JABUA 10/08/2012 | Slide 11

Disadvantages of an old readout system v LOW TOTAL SPEED OF READOUT FROM DETECTORS Reasons: Low efficiency of detector readout software. Necessity of signal multiplexing, causing additional timing delays. Solution: Development of the software, simultaneously generating the signals for 6 CCDs, thus effectively eliminating the need of their multiplexing. v LOW LEVEL OF RELIABILITY AND EFFICIENCY Reason: Mix-up of personal computer’s standard electronics and detector’s specific hardware. Solution: Physical and logical separation of upper mentioned hardware resources. MALKHAZ JABUA 10/08/2012 | Slide 12

RENEWED readout system of detectror. What we did here? Labview R PC Temperature Controller CRATE Fiber 1 x optical PCI bridge T. C. Optics 1 x sequencer L 1 -L 9 R 1 -R 9 Temperatures T. A. Linux PC 2 x ADCs P/A 1 4 P/A 2 5 P/A 3 6 Vacuum Cryostat P/A Temperature Acquisition Device Outer Electronics Crate P/A NEW readout SYSTEM Projected at ZEL/ FZJ Fig. 10 The NEW readout scheme for the detectors. MALKHAZ JABUA 10/08/2012 | Slide 13

Radioactive source we use at present 55 Fe ( 55 Mn)* Mn Ka : E = 5892 e. V Mn Kb : E = 6490 e. V Int Ka / Int Kb 7. 2 MALKHAZ JABUA 10/08/2012 | Slide 14

First tests with 55 Fe DET. 1 DET. 3 Kα (e. V) Lit. Noise 5892 Kβ (e. V) Lit. 6490 Kα / Kβ Lit counts 7. 24 ± 0. 28 DISTANCE TO DETECTOR 10 CM Kα (e. V/Ch) Fig. 11 ADC spectrum. 6496 6474 Kα / Kβ channels 6. 171 Kβ (e. V) Kβ 6. 177 7. 3± 0. 3 9. 9± 0. 4 DISTANCE TO DTECTOR 20 CM (e. V/Ch) 6. 151 Kβ (e. V) 6486 6447 Kα / Kβ 8. 3± 0. 5 7. 8± 0. 4 MALKHAZ JABUA 10/08/2012 | Slide 15

What I did and achieved during my stay at IKP/FZJ Juelich Participation in a detector electronics setup process Design and realization of detectors’ new readout software and hardware resources and it’s adaption to the demands of real time experiment RESULT: Accelerated system performance by the factor of three Creation of software modules which decodes and logically organizes the data taken from ADC units. RESULT: New more flexible and user friendly software for CCD data analysis Taking part in a collaboration to set up user friendly temperature monitoring and control system based on LABVIEW software GENERAL GOAL: Flexible and reliable readout system for data processing and analysis MALKHAZ JABUA 10/08/2012 | Slide 16

FUTURE PLANS at IKP/ FZJ Optimization of the operating parameters of the detectors Optimization of hardware and software modules serving the system After successful tests, detector mounting in a crystal spectrometer X-ray energy measurements from different compounds MALKHAZ JABUA 10/08/2012 | Slide 17

FUTURE PLANS at IEK/ FZJ Research of an internal friction inside solid materials at different temperatures. Disadvantages of current appliances: research Unstability and correspondingly the low precision level of measurements, caused by the use of thread. - Impossibility of automatization and computerization. - 7 -8 -9 -10 Hanging system for the Pendelum (1) through the thread (7). 5 - speciment, 6 - oven. Fig. 12 Design of current infra-low frequency relaxometer for the measurement of an internal Friction inside solid materials at different temperatures. MALKHAZ JABUA 10/08/2012 | Slide 18

NEW type of relaxometer Electromagnets for excitation of torsional vibrations – 22, lighter – 25, focusing lens – 26, mirror – 27, differential photoresistor – 28. Fig. 13 -14. Design of the new infra-low frequency automated relaxometer (without thread) for the measurement of an internal Friction inside solid materials at different temperatures. MALKHAZ JABUA 10/08/2012 | Slide 19

STEPS TO BE DONE Build-up and test of an unique appliance for the measurement of an internal friction inside solids materials Development of software product for readout and analysis of the data taken from experiments Examination of projected hardware and software resources in real time experimental conditions High precision measurement and data analysis MALKHAZ JABUA 10/08/2012 | Slide 20

Name of research work Monitoring and control of physical processes inside technological and experimental research appliances MALKHAZ JABUA 10/08/2012 | Slide 21

Together we are stronger Thanks for your attention MALKHAZ JABUA 10/08/2012 | Slide 22