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This research project is supported by a Marie Curie Early Initial Training Network Fellowship of the European Community’s Seventh Framework Programme under.

Published byThomasina Beatrix Richard Modified over 8 years ago

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Presentation on theme: "This research project is supported by a Marie Curie Early Initial Training Network Fellowship of the European Community’s Seventh Framework Programme under."— Presentation transcript:

1 This research project is supported by a Marie Curie Early Initial Training Network Fellowship of the European Community’s Seventh Framework Programme under contract number (PITN-GA-2011-289355-PicoSEC-MCNet) Light extraction from scintillating crystals 13 March 2015 Pawel Modrzynski, CERN Marie Curie fellow

2 Agenda 1.Scintillating crystals 2.Nano - patterning of scintillating crystals – ideas 3.Few words about me ‹#›

3 Crystals Scintillator is a material that exhibits scintillation — the property of luminescence when excited by ionizing radiation. Luminescent materials, when struck by an incoming particle, absorb its energy and scintillate, (i.e., re-emit the absorbed energy in the form of light). ‹#›

4 0.8mm x 0.8mm crystal has been wrapped in carbon conductive tape. Visible face has been deposited with chromium ‹#›

5 Sample after patterning. 24 patches – 40000 holes each. Holes dimensions: ~320nm diameter, ~400nm depth 960000 holes ‹#›

6 1.4x1.4x7.2 mm crystal deposited with TiO2, 178 zones of 50x50 um – 10000 holes each 24 patches – directly engraved in the crystal, 40000 holes each 30 – 35 % from preliminary measurements between patterned and unpatterned area, when excited with UV diode, air contact 40 – 70 % from preliminary measurements between patterned and unpatterned area, when excited with UV diode, air contact

7 Opal photonic crystals 2 ideas for Opal PhC on scintillators: i.Mono/Polilayer deposited on the crystal. ii.TiO2 patterning using “lift off” of the opals. ‹#›

8 Langmuir-Blodgett monolayer deposition method Langmuir-Blodgett deposition trough (produced by KSV Nima)

9 Mono/multilayer deposition on the crystal. ‹#› Monolayer on the water surface crystal

10 Effect: -Sphere size: ~390nm -Hexagonal pattern -Spheres positions maintained

11 Langmuir-Blodgett deposition (AFM image) Sample: glass Effect: -Sphere size: ~400nm -Hexagonal pattern

12 ‹#› Deposition tests : Langmuir-Blodgett method Sample: glass and silicon wafer Material: 400nm in diameter polystyrene spheres

13 Few Words about me PhD Student at UCL(University College London) Topic: Light extraction from scintillating crystals Studies: Materials engineering, Wroclaw University of Technology (2004 – 2010) Master thesis: Vortex Anemometer Using MEMS Cantilever Sensor http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=55985 05 Vortex Anemometer Using MEMS Cantilever Sensor, Zylka, P.; Modrzynski, P.; Janus, P.; Journal Of Microelectromechanical Systems, ISSN: 10577157, Vol: 19, Issue: 6, Date: 2010, Start page: 1485,

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