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Nanoparticle Radiation Detectors

Nanoparticle Radiation Detectors. Outline Conventional Radiation Detectors Nanoparticle Radiation Detectors CNT IR and UV detectors What can you do with γ rays? Conclusions. Conventional Radiation Detectors.

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Nanoparticle Radiation Detectors

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  1. Nanoparticle Radiation Detectors • Outline • Conventional Radiation Detectors • Nanoparticle Radiation Detectors • CNT IR and UV detectors • What can you do with γ rays? • Conclusions A. Kyriakis, NCSR "Demokritos"

  2. Conventional Radiation Detectors Many types of radiation detectors are used from gas detectors, to solid state like scintillators, Silicon based stip or pixel detectors or even CdTe and Diamond sensor. All of them are made of conventional materials and mainly silicon A. Kyriakis, NCSR "Demokritos"

  3. Nanoparticle Radiation Detectors The post-Silicon era Carbon in the form of Nanotubes A. Kyriakis, NCSR "Demokritos"

  4. Single Walled Carbon Nanotubes(SWCNT) A. Kyriakis, NCSR "Demokritos"

  5. CNT’s types A. Kyriakis, NCSR "Demokritos"

  6. SWCNT IR detector SEM photo of the IR CNT detector basic block H.Chen et al “Carbon nanotube based multiple spectrum infrared camera”, NMDC, 2011 IEEE A. Kyriakis, NCSR "Demokritos"

  7. MWCNT Growth Mechanism Gruppo INFN pe le NanoTecnologie, LFF Workshop – Napoli – November 22-23, 2012 A. Kyriakis, NCSR "Demokritos"

  8. MWCNT Carpet Development MWCNT Carpet Nuclear Instruments and Methods in Physics Research A 629 (2011), 377-381 A. Kyriakis, NCSR "Demokritos"

  9. MWCNT in different substrates • Work performed by the SinPhoNIA collaboration (sinphonia.na.infn.it) show that the hetero-junction created when CNT are grown on Si has surprising photo-detecting properties: • Operate from UV to IR • Room Temperature • No electronics for signal amplification • Low voltage to operate ~20V • Very cheap in production Gruppo INFN pe le NanoTecnologie, LFF Workshop – Napoli – November 22-23, 2012 A. Kyriakis, NCSR "Demokritos"

  10. What can you do with γ rays? Main absorption mechanism for 200KeV to 2MeV γ rays in Carbon is Compton scattering A. Kyriakis, NCSR "Demokritos"

  11. What can you do with γ rays? • What is important is to trace the recoil electron path coming from the Compton scattering to shrink the cone and estimate the source of the γ rays. • Calculation show that scattered electrons of about 1MeV are expected to travel about 2mm in Carbon and thus this is a good detector dimension to have full charge collection • Try to construct a pixel CNT • detector of about 2mm depth • and 500μm x 500μm • pixel size or even less to • have enough hits to • reconstruct the • electron path. A. Kyriakis, NCSR "Demokritos"

  12. Conclusions • A lot of work has been done worlwide in the last years to move from Silicon to Carbon age • Seems that CNT could give cheap and reliable photon detectors from IR down to UV but the detection capability in X - rays and γ –rays is still under investigation • Nevertheless seems a very promising and challenging field that worth to be investigated A. Kyriakis, NCSR "Demokritos"

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