2017 Fiscal Year Research-status Report
Development of X-ray phase contrast imaging platforms for investigations dynamic evolution of matter in extreme conditions
| Project/Area Number |
17K05729
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| Research Institution | Osaka University |
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Principal Investigator |
Pikuz Tatiana 大阪大学, 工学研究科, 特任准教授(常勤) (20619978)
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| Project Period (FY) |
2017-04-01 – 2020-03-31
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| Keywords | Phase contrast imaging, / High Resolution imaging, / Pump-probe experiment, / LiF detector, / XFEL backlighting, |
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| Outline of Annual Research Achievements |
In the first year the requirements on experimental platform for high performance imaging of shock wave front and Rayleigh-Taylor instabilities (RTI) in laser compressed target was formulated. Concept is based on general principles of a point projection absorption and phase-contrast imaging and implementation of novel high-resolution large dynamic range LiF crystal detector. Depending on the type of backlighter source two experimental layout proposed, designed and constructed as prototypes. In the first approach a LiF detector is coupled with non-coherent laser produced plasma source (NCPPI scheme), in the second one a LiF detector is combined with coherent XFEL beam (CPPI scheme). The main elements of NCPPI and CPPI are installed at LULI2000 laser system and at SACLA, correspondently. First test-measurements have been done. NCLR scheme design to reduce spatial resolution down to few microns by suppression of penumbra blurring. Test experiments at LULI200 laser facility demonstrated the spatial resolution of 3 microns with source size of 25 micron. CPPI scheme utilizes high brightness, full coherence and collimation of XFEL beam. It allows observation of small density gradients in both high- and low absorption object. At SACLA XFEL high contrast test-images of RTI targets with spatial resolution ~ 1 micron in the field of view of 1.5 cm2 were measured at energy of 10 keV.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
During the first year of work all plans were realized.
At first test-measurements at LULI200 the spatial resolution of ~3 microns in the imaging of test grid (1000 lpi frequency) was achieved, that is 4 times better compare to resolution realized at existing schemes of pump-probe experiments. For projection imaging scheme the possibility to reach resolution significantly better then size of backlighter source is very promising.
Very impressive results were obtained at SACLA on imaging of RTI target. In single shot of XFEL radiation highly enhanced phase contrast detailed images of high absorbing ripple structure attached to very low density plastic foam were measured with spatial resolution of 1 micron in the field of view of > 1.5 cm2. The aspect ratio field of view/spatial resolution is the highest, observed in such type of experiment.
Articles: 1 published (Burst intensification by singularity emitting radiation in multi-stream flows, Scientific reports (2017) 7:17968), 1 accepted (Development of new diagnostics based on LiF detector for pump-probe experiment, MRE), 1 submitted (Turbulent hydrodynamics experiments in HED plasmas, High Power Laser Science and Engin.), 1 article “Advances high resolution x-ray diagnostics for HEDP experiments” prepared for submission to Scientific Research. Presentations: 1 invited, 1 oral, 2 posters.
Obtained results are very optimistic and confirm validity of considered approach to reach the main goal of the project.
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| Strategy for Future Research Activity |
-Further optimization of CPPI scheme at XFEL facility to carry out experiments on phase-contrast imaging of shock waves front in laser compressed thin targets.
-Systematic metrological measurements for characterization photoluminescence response and spatial resolution of LiF detector to coherent radiation of XFEL for photon energy of 5 - 10 keV.
-Further optimization of NCPPI scheme at LULI 2000 facility for radiography experiment on observation dynamic evolution of RTI driven by laser pulses.
-Modeling of the absorption and phase contrast transmission of X-ray radiation passing through various pump-probe targets.
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| Causes of Carryover |
During experimental research it was found that at some particular condition a LiF crystal detector can be used as rewritable imager, i.e. measurement can be done with the same crystal several times. It was also found an operation mode which allows to apply a multi-imaging recording on the same LiF crystal. That significantly reduced the needed number of crystals compare to the original assumption. I plan the rest of the money to transfer to the FY2018 and use them to purchase additional linear stage and optical-mechanical mounting elements.
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[Journal Article] Development of new diagnostics based on LiF detector for pump-probe experiments2018
Author(s)
Pikuz T.A., Faenov A.Ya., Ozaki N., Matsuoka T., Albertazzi B., Hartley N., Miyanishi, K Katagiri, S. Matsuyama, K. Yamauchi K., Habara H., Inubushi Y., Togashi T., Yumoto H., Ohashi H., Tange Y., Yabuuchi T., Yabashi M., Grum-Grzhimailo A., Casner A., Skobelev I., Makarov S. Pikuz S. , et all.
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Journal Title
Matter and Radiation and ExtremesRadiation
Volume: 印刷中
Pages: 印刷中
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[Presentation] Development of new diagnostics in the interests of pump-probe experiments2017
Author(s)
Pikuz T.A., Faenov A.Ya., Ozaki N., Matsuoka T., Albertazzi B., Hartley N., Matsuyama S., Yamauchi K., Habara H., Inubushi Y., Togashi T., Yumoto H., Ohashi H., Tange Y., Yabuuchi T., Yabashi M., Grum-Grzhimailo A., Casner A., Rigon G., Koenig M., Tanaka K.A., Ishikawa T., Kodama R.
Organizer
International Conference on Matter and Radiation at Extremes (ICMRE)
Int'l Joint Research / Invited
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[Presentation] New x-ray diagnostic development for pump-probe experiments2017
Author(s)
Pikuz T.A., Faenov A.Ya., Ozaki N., Matsuoka T., Albertazzi B., Hartley N., Matsu Campus, yama S., Yamauchi K., Habara H., Inubushi Y., Togashi T., Yumoto H., Ohashi H., Tange Y., Yabuuchi T., Yabashi M., Grum-Grzhimailo A., Casner A., Rigon G., Koenig M., Tanaka K.A., Ishikawa T., Kodama R.
Organizer
The 1st Asia-Pacific Conference on Plasma Physics (AAPPS-DPP 2017)
Int'l Joint Research
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[Presentation] Development of new diagnostics in the interests of pump-probe experiments2017
Author(s)
Pikuz T., Faenov A., Ozaki N., Matsuoka T., Albertazzi B., Hartely N., Matsuyama S., Yamauchi K., Habara H., Inubushi Y., Togashi T., Yumoto H., Ohashi H., Tange Y., Yabuuchi T., Yabashi M., Grum-Grzhimailo A., Casner A., Rigon G., Koenig M., Tanaka K.A., Ishikawa T., Kodama R.
Organizer
The 6th International Conference on High Energy Dendsity Physics (ICHED2017)
Int'l Joint Research
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