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Summer Students Practice Flerov Laboratory of Nuclear Reactions, JINR, Dubna 2010

Summer Students Practice Flerov Laboratory of Nuclear Reactions, JINR, Dubna 2010. Stud ies with radioactive ion beams at fragment separators. student: Maciej Mikulski (UJ) and his supervisor: dr Grzegorz Kaminski. Main goals:. learn how to produce Radioactive Ion Beams (RIBs).

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Summer Students Practice Flerov Laboratory of Nuclear Reactions, JINR, Dubna 2010

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  1. Summer Students Practice Flerov Laboratory of Nuclear Reactions, JINR, Dubna 2010 Studieswithradioactiveionbeamsat fragment separators FLNR Dubna

  2. student: Maciej Mikulski (UJ) and his supervisor: dr Grzegorz Kaminski FLNR Dubna

  3. Main goals: learn how to produce Radioactive Ion Beams (RIBs) get familiar with object of experiments at in-flight separator make friendship with Lise identify nuclei from experimental data get practical knoweledge about neutron detectors FLNR Dubna

  4. the Acculinna Group is studying the properities and the structure of lightest nuclei FLNR Dubna FLNR Dubna

  5. Two main methods of producing exotic beans: • Isotope Separation On-Line (ISOL) • In Flight pure beams time of life limitation > 0.1 s beams: keV-GeV cocktail of isotopes very short living nuclei > 1 ms beams: a few teens of MeV-GeV FLNR Dubna

  6. In-flight example B - magnetic rigidityB – vector of magnetic field  - radius of particle trajectory E ~ a few teens MeV/A primary beam thin target start stop detectors TOF – Time Of Flight B1 B3 B2 B1< B2<B3 degrader dE – energy losses FLNR Dubna

  7. Measurements on 11B beam @ 32.9AMeV

  8. Measurement method two sytmetrical magnetic sections: dispersive&achromatic beam 11B 33 AMeV Si 300 mm 16x16 strips Si 1mm 16x16 strips CsI/PD 4 units 9Be (14 mg/cm2)27Al (17 mg/cm2)197Au (9 mg/cm2) a slit instaled in dispersive focal plane to increase the momentum resolution ~0.13% dp/p

  9. Magnetic field scanning

  10. simulations from Lise++ experimental data this let us identify nuclei

  11. FLNR Dubna

  12. Velocity distributions: DIC & DIRECTcomponents Each of this components relates to diffrent reaction mechanism. FLNR Dubna

  13. Measurements on 32S beam @ 50.3AMeV

  14. Measurements on 32S beam @ 50.3AMeV 32S @ 50 AMeV detectors 9Be, 500m Beam of isotopes at B close to 26S Plastic scintilator & momentum slit Wedge 9Be, 500m & momentum slit

  15. Measurements on 32S beam @ 50.3AMeV ΔE-ToF identification plots for the cases of separator tuningon 27S (a) and 26S (b) No events of 26S and 25P !!! Time of flight (TOF) of 26S too long Not optimal configuration target & wedge thickness – too thick

  16. Measurements on 32S beam @ 50.3AMeV Practice goal: find better configuration of target&wedge for new measurements on 32S beam – a compromise between 26S energy (TOF), target and wedge thickness and data acquisition dead time wedge 100μm wedge 200μm wedge 300μm wedge 500μm

  17. neutron detectors

  18. neutron detector voltage divider photomultiplier stilbene cristal FLNR Dubna

  19. neutron multi detector of 64 modules is beeing constructed, now we have 32 stibene crystals  80 x 50 mm3 5H 8He 10He11Li 14Be FLNR Dubna

  20. each of us mounted a few modules FLNR Dubna

  21. special thanks to my always friendly and patient supervisor and to hard-working and ready to help organizators of thispractise dr Władysław Chmielowski dr hab. Roman Zawodny mgr Grzegorz Kamiński thankyou for yourattention FLNR Dubna

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