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Dark side of the light

Dark side of the light. Ing. Karolina Macúchová Supervisor : doc. Ing. J. Zicha, CSc. CERN – experiment OSQAR. Motivation. Dark Matter – Neutrinos, Wimps, Axions?. Search for Axions. Experimental approach: axion coupling with two photons.

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Dark side of the light

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  1. Konference Studentské tvůrčí činnosti 2013 Darksideofthelight Ing. Karolina Macúchová Supervisor: doc. Ing. J. Zicha, CSc.

  2. Konference Studentské tvůrčí činnosti 2013 CERN – experiment OSQAR

  3. Konference Studentské tvůrčí činnosti 2013 Motivation Dark Matter – Neutrinos, Wimps, Axions?

  4. Konference Studentské tvůrčí činnosti 2013 Search for Axions Experimental approach: axion coupling with two photons Probability of photon – axion conversion in vacuum: Photon regeneration experiment

  5. Konference Studentské tvůrčí činnosti 2013 Experimental Setup • laser • a, b – adjustable mirrors for beam • beam expander • first LHC magnet • light trap • optical filters • second LHC magnet • dark chamber • CCD camera • data acquisition - PC • cooling (H2O) • cooling (liquid Helium, T = 1.9 K) • vacuum pump (p = 10-6-10-7mbar) • vacuum pump • cooling (LN2) • laser beam • Laser cavity

  6. Konference Studentské tvůrčí činnosti 2013 Experimental Setup Photon source: Ar+4W at 514 nm Laser injection LHC magnets: 9T over 14.3 m cooled down to 1.9 K

  7. Konference Studentské tvůrčí činnosti 2013 Adjustment and focusing →

  8. Konference Studentské tvůrčí činnosti 2013 Other instrumentation Dark chamber – neutral density filters Beam dump

  9. Konference Studentské tvůrčí činnosti 2013 Laser laboratory • Plano-concave laser resonator • 1000 mm prototype • He-Ne laser 18mW at 632.8 nm

  10. Konference Studentské tvůrčí činnosti 2013 Outlook • Approximately 21 m long resonator for the OSQAR experiment • In vacuum 10-6 mbar

  11. Konference Studentské tvůrčí činnosti 2013 Thankyouforyourattention.

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