TEMPORARY POSITIONS

available in the AURIGA Collaboration

at Padova and Trento Universities

starting from January 2000

The AURIGA Collaboration is committed in a research work on the development of cryogenic resonant motion transducers for resonant detectors of gravitational waves, both of the capacitive type equipped with a readout based on Superconducting Quantum Interference Devices (SQUIDs) and of the optical type (Fabry-Perot resonant cavities). This program has been recently funded by a grant from the Italian Ministery of University and Research (MURST-COFIN1999), which provides for the following temporary positions. This research activity will proceed in parallel to the operation and upgrade of AURIGA, an INFN ultracryogenic bar detector of gravitational waves.

The main goal of this R&D is to realize transducer systems in configurations ready to be integrated in the bar detectors and able to improve both the energy sensitivity to impulsive signals and the effective bandwidth of the operating detectors by almost two orders of magnitude within two years. A facility equipped with mechanical suspensions and a 3He-4He dilution refrigerator will allow to fully test and optimize the complete transducer systems at ultracryogenic temperatures.

The available temporary positions starting from January 2000 are:

  1. A. 2-years post-doc at the Physics Department of the University of Padova. Physics PhD or equivalent scientific experience is required. Main working site: INFN-Laboratori Nazionali di Legnaro. Main working field: R&D of resonant capacitive transducers equipped with a SQUID amplifier readout.
  2. 2-years post-doc at the Physics Department of the University of Trento. Physics PhD is required. Main working site: Low Temperature Laboratory of Trento. Main working field: R&D of SQUID-based amplification systems coupled to resonating loads.
  3. 1+1 years technologist at the Physics Department of the University of Padova. University degree in experimental physics is required. Main working site: INFN-Laboratori Nazionali di Legnaro. Main working field: operation and development of the ultracryogenic test facility for displacement transducers.
  4. Short term grants are available for experimental physicists of various levels of experience visiting Trento to work on specific deliverables related to the development of the cryogenic capacitive transducer system equipped with SQUID amplifiers.
For more information please contact:
Dr. Giovanni Andrea Prodi
Physics Department, University of Trento,
I-38050 Povo (Trento) Italy
mailto:prodi@science.unitn.it
phone +39 0461 881521
fax +39 0461 881696
 
 

Outlines of the Scientific Programs:

  1. post-doc on R&D of resonant capacitive transducers equipped with a SQUID amplifier readout The post-doc will collaborate with other AURIGA staff members and Ph.D. students. He will contribute to the development of transducer-amplifier systems and to the optimization of their noise performances by working particularly on:
      1. the design and optimization of resonant capacitive motion transducers with respect to the mechanical and electrical properties;
      2. its integration with the SQUID based amplification and impedance matching system developed at Trento;
      3. the optimization of the overall noise performance of transducer-amplifier systems in configurations suitable to be integrated in the AURIGA detector.
    The ultracryogenic test facility for displacement transducer systems at INFN-LNL will be used extensively.
     
     
  2. post-doc on R&D of SQUID-based amplification systems coupled to resonating loads The post-doc will collaborate with other AURIGA staff members and Ph.D. students. He will contribute to the development of SQUID-based amplification systems for resonating loads close to 1 kHz by working particularly on:
      1. the development and test of very low noise SQUID systems with resonating input loads;
      2. the optimization of their noise performances including the back action contribution;
      3. the optimization of the matching stages between the electromechanical displacement transducer and the SQUID system.
    The activity will be performed both at liquid Helium temperatures and at 3He-4He dilution refrigerator temperatures.

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  4. technologist for the operation and development of the ultracryogenic test facility for displacement transducers The technologist will collaborate with other AURIGA staff members and Ph.D. students. He will contribute to the testing of complete transducer systems, both capacitive and Fabry-Perot. In particular he will assist with the operation of the the ultracryogenic transducer test facility, with the integration of transducer systems in the facility and with the necessary developments of the facility.
    The candidate should preferably have experience on cryogenics and vacuum techniques and some background on material science.

  5.  
     
  6. The short term visiting positions at Trento to work on the development of the cryogenic capacitive transducer system equipped with SQUID amplifiers could contribute in many respects as for:
      1. the improvement of the electromechanical transduction efficiency;
      2. the improvement of the energy coupling to the SQUID amplifier;
      3. the development of very low noise SQUID systems coupled to resonating loads;
      4. the thermalization at ultracryogenic temperatures of transducer systems;
      5. the improvement of the quality factors of electrical and mechanical resonators in the transducer systems.

Early applications will receive first consideration.