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HPGe detectors technologies

HPGe detectors technologies. Dzhelepov Laboratory of Nuclear Problems. Participants : Agnieszka Kapelak , UAM Poznań Michalina Komorowska, UW Warszawa Paulina Staszewska, UAM Poznań Supervisor : mgr inż. Dariusz Borowicz, IFJ PAN Kraków, DLNP JINR.

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HPGe detectors technologies

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  1. HPGedetectorstechnologies Student Practice in JINR Fields of Research - HPGe detectors technologies

  2. Dzhelepov Laboratory of Nuclear Problems Participants: • Agnieszka Kapelak , UAM Poznań • Michalina Komorowska, UW Warszawa • Paulina Staszewska, UAM Poznań Supervisor: mgrinż. Dariusz Borowicz, IFJ PAN Kraków, DLNP JINR Experimental Research Department of Nuclear Spectroscopy and Radiochemistry Student Practice in JINR Fields of Research - HPGe detectors technologies

  3. High PurityGermaniumDetectorsbasics and application • ƴ - rayspectroscopy • Nuclearmedicine • Environmental monitoring • Verygood energy resolution Student Practice in JINR Fields of Research - HPGe detectors technologies

  4. LiquidNitrogenCooling Variety of HPGecryostats and Dewarvessels Student Practice in JINR Fields of Research - HPGe detectors technologies

  5. Differenttypes of HPGedetectors Planardetectors • For detectinglowenergies • ≤ 150 keV • Applied for polarizationmeasurments • Smallelectricalcapacitance • example 2 pF for X-raysdetectors (typically 16 mm diameter and 5 mm thick) Student Practice in JINR Fields of Research - HPGe detectors technologies

  6. Differenttypes of HPGedetectors Coaxialdetectors • For higherenergies, up to severalMeV • Largervalues of electricalcapacitance ̴20 pF • Commonlyusedcrystalsize - 6 cm indiameter Student Practice in JINR Fields of Research - HPGe detectors technologies

  7. Specialtypes of HPGedetectors Specialdetector for lowenergies • Largevolume50 cm³ • Electricalcapacitancelowerthan 1 pF! • detectionthreshold250 eV! Student Practice in JINR Fields of Research - HPGe detectors technologies

  8. From materials to devicesGermaniumdetectorstechnologies Cuttingthecrystal, making of thep-njunction Cutting out theprotecion ring Evaporation of Au on p-njuntionside Student Practice in JINR Fields of Research - HPGe detectors technologies

  9. Germaniumdetectorstechnologies Etching and oxidizing for an ohmic contact. Temperatureevaporation of Pd and Au upon a prepared surface. Final etching and protecting the surface from theenvironment. Student Practice in JINR Fields of Research - HPGe detectors technologies

  10. Making of thedetectors BEFORE AFTER Student Practice in JINR Fields of Research - HPGe detectors technologies

  11. Detectorscharacteristics and measurments The higher possible voltage value, the better charge collection and better time resolution Voltage – Capacity characteristic Voltage – Current characteristic • U₀ - voltagevalue for whichthefullvolume of thedetectorisactive Student Practice in JINR Fields of Research - HPGe detectors technologies

  12. Detectorscharacteristics and measurments Energy resolution measurments for HPGe Student Practice in JINR Fields of Research - HPGe detectors technologies

  13. DifferentsetupsequippedwithHPGe GAMMASPHERE GASP JUROGAMM EAGLE EUROBALL Student Practice in JINR Fields of Research - HPGe detectors technologies

  14. Thanks for yourattentionSpecialthanks to: • Dr Stanislav Z. Pakuliak (BLTP JINR, Dubna) • Dr Władysław Chmielowski (JINR, Dubna) • Dr hab. Roman Zawodny (UAM, Poznań) • mgr inż. Dariusz Borowicz (IFJ, Kraków / JINR, Dubna) Student Practice in JINR Fields of Research - HPGe detectors technologies

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