Sökning: "squid"

Visar resultat 21 - 25 av 85 avhandlingar innehållade ordet squid.

1. 21. Probing quantum and classical noise in nano circuits

   Författare :Arsalan Pourkabirian; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; transmon; vacuum fluctuations; circuit-QED; SET; dynamical Casimir effect; two-level fluctuator; artificial atom; SQUID; charge noise;

   Sammanfattning : This thesis presents measurements of classical and quantum noise in nano circuits.The first part of the thesis, covers extensive measurements on charge noise sources.Low-frequency charge noise with the power spectrum close to 1/f(wherefis thefrequency) has been observed in a variety of systems. LÄS MER

3. 22. YBa2Cu3O7-δ Biepitaxial and Step Edge Josephson Junctions on MgO Substrates. SQUID Amplifier

   Författare :Jaime Ramos; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; step edge junction; noise; biepitaxial junction; energy resolution; high-TC superconductor; dc SQUID; YBa2Cu3O7; laser deposition; CeO2; amplifier; Germany; sapphire; MgO;

   Sammanfattning : This thesis concerns the preparation of Josephson junctions and their applications in Superconducting Quantum Interference Devices (SQUIDs). High temperature superconductors were used for operation at 77 K, the boiling temperature of liquid nitrogen. LÄS MER

4. 23. Key Components for High Tc SQUID Magnetometers

   Författare :Per-Åke Nilsson; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : This thesis describes the development of key components for superconducting quantum interference device (SQUID) magnetometers in the high temperature superconductor YBa2Cu3O7 (YBCO). Such magnetometers are made for liquid nitrogen temperature operation, as opposed to low Tc devices that are confined to liquid helium. LÄS MER

5. 24. Ultra-sensitive measurements of magnetically labelled RCA products in a microfluidic channel using a high-Tc SQUID

   Författare :Sobhan Sepehri; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; diagnostics.; high-Tc SQUID; biosensor; magnetic nanoparticle; rolling circle amplification; magnetic bioassay;

   Sammanfattning : The development of a nucleic acid (deoxyribonucleic acid (DNA), ribonucleic acid (RNA)) bioassay based on magnetic nanoparticles (MNPs) with a high-Tc superconducting quantum interference device (SQUID) gradiometer as a magnetic readout is described. The specific binding of the MNPs to the target DNA molecules changes the MNPs size distribution and, therefore, the relaxation dynamics and is measured by magnetic ac susceptometry. LÄS MER

7. 25. Fabrication and noise properties of high-Tc SQUIDs with multilayer superconducting flux transformers

   Författare :Maxim Chukharkin Leonidovich; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; YBCO; High-Tc SQUIDs; SQIFs; ulf-NMR; SQUID magnetometers;

   Sammanfattning : The thesis describes the development of highTc superconducting quantum interference devices (SQUIDs) with multilayer thin film flux transformers. High-Tc SQUID magnetometers are promising in various biomedical applications, including magnetoencephalography (MEG) and ultra-low field magnetic resonance imaging (ulf-MRI). LÄS MER