Obiettivo ObjectivesThe objectives of this project are to develop ultra-low noise, wide bandwidth SQUID amplifiers to demonstrate their utility by incorporating them into five different demonstrator instruments and two practical measurement applications. SQUIDs based on low temperature superconductors (LTS) and high temperature superconductors (HTS) will serve as the key elements in these systems. Instrumentation will be developed around the SQUIDs to ensure practical measurements of electric quantities. The performance and limits of these demonstrators will be evaluated and compared to conventional technologies, e.g. semiconductors.State of progressThe programme is currently running in its final year. Several deliverables have been completed, partly well exceeding the specifications given in their Work Package description. The LTS picovoltmeter reached a bandwidth of 12 MHz (target was 5 MHz); the LTS noise thermometer was proved to work down to well below 280 mK (target range was 1-4 K); the related work packages have been completed. The HTS picovoltmeter has been used for transient measurements, currently the performance is optimised by the use of integrated input coils in the HTS SQUIDs. The HTS noise thermometer system has been experimentally proven to work qualitatively, currently the resistive SQUIDs as well as the readout SQUIDs are being optimised. SQUID NMR measurements have been successfully demonstrated with the completed NMR amplifier. All project partners are determined to work together in close and constructive scientific collaboration to finish the programme successfully on time.BackgroundSuperconducting Quantum Interference Devices (SQUIDs) are the most sensitive sensors for magnetic flux. By variation of the input circuitry to the SQUIDs, they can be used for electrical measurements, where resolutions down to 10-12 V and 10-14 A have been achieved in laboratory environment. In this configuration, SQUIDs can be seen as a basic device, similar to the transistor, to be incorporated in amplifiers and systems with noise levels impossible to achieve with any other technology.WorkprogrammeThe programme is divided into the development of:* SQUID amplifiers for LTS and HTS SQUIDs as a base for the programme, * picovoltmeters, incorporating LTS and HTS SQUIDs,* noise thermometers, incorporating LTS and HTS SQUIDs and* a nuclear magnetic resonance (NMR) amplifier, based on LTS SQUIDs.Successful completion will be shown by demonstrators used for electrical measurements. The HTS picovoltmeter will be used as a transient detector from high-voltage components, the NMR amplifier will be integrated in an instrument for practical NMR measurements. All demonstrators will be developed and built in close collaboration by the different project partners. Campo scientifico engineering and technologyelectrical engineering, electronic engineering, information engineeringelectronic engineeringsensorsnatural sciencesphysical scienceselectromagnetism and electronicssemiconductivitynatural sciencesphysical scienceselectromagnetism and electronicssuperconductivity Programma(i) FP4-SMT - Specific research and technological development programme in the field of standards, measurements and testing, 1994-1998 Argomento(i) 0101 - Measurements in support of the research phase Invito a presentare proposte Data not available Meccanismo di finanziamento CSC - Cost-sharing contracts Coordinatore Oxford Instruments plc Contributo UE Nessun dato Indirizzo Cowley Road CB4 4WZ Cambridge Regno Unito Mostra sulla mappa Costo totale Nessun dato Partecipanti (5) Classifica in ordine alfabetico Classifica per Contributo UE Espandi tutto Riduci tutto Asea Brown Boveri AB Svezia Contributo UE Nessun dato Indirizzo 2,Gideonsbergsgatan 2 721 78 Västeras Mostra sulla mappa Costo totale Nessun dato Bundesrepublik Deutschland Germania Contributo UE Nessun dato Indirizzo 100,Bundesallee 100 38116 Braunschweig Mostra sulla mappa Costo totale Nessun dato Chalmers University of Technology AB Svezia Contributo UE Nessun dato Indirizzo 1,Kemigarden 1 412 96 Göteborg Mostra sulla mappa Costo totale Nessun dato NKT RESEARCH CENTER A/S Danimarca Contributo UE Nessun dato Indirizzo 11,Priorparken 878 2605 BRONDBY Mostra sulla mappa Costo totale Nessun dato National Physical Laboratory (NPL) Regno Unito Contributo UE Nessun dato Indirizzo Queen's Road TW11 0LW Teddington Mostra sulla mappa Costo totale Nessun dato