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Home page of Luciano Gottardi

Instrument Scientist

Instrument Science Group

NWO-I SRON - Netherlands Institute for Space Research

Welcome to South Holland

Niels Bohrweg 4
2333 CA Leiden

The Netherlands

Tel: +31 (0)88 777 5861

Tel. lab: (5896,5897)
Fax: +31 (0)88 777 5601

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Research Interests

Low Temperature Detectors for Astrophysics and Particle Physics

See A Review of X-ray Microcalorimeters Based on Superconducting Transition Edge Sensors for Astrophysics and Particle Physics

The X-IFU is a 2-D imaging camera, which allows the identification and characterization of the different ionization stages in hot plasmas thanks to its excellent spectral resolution (2.5 eV at 6 keV). This enables detailed diagnostics of abundances, temperatures, densities and bulk or turbulent velocities of hot plasma in extended objects. It is an integral-field spectrometer operating in the soft X-ray band. The detector consists of an array of 3840 micro-calorimeters based on Transition Edge Sensors (TESs). The read-out is performed using Frequency Domain Multiplexing (FDM) in the 1-5 MHz bandwidth and is based on low noise Superconducting Quantum Interference Devices (SQUID) and high-Q superconducting LC resonators.

The MiniGRAIL detector is a cryogenic 68 cm diameter spherical gravitational wave antenna made of CuAl(6%) alloy with a mass of 1400 Kg, a resonance frequency of 2.9 kHz and a bandwidth around 230 Hz. The quantum-limited strain sensitivity dL/L would be ~4x10-21. The antenna will operate at a temperature of 20 mK.

Sensitivity of the spherical gravitational wave detector MiniGRAIL operating at 5 K. Phys. Rev. D 76, 102005 (2007)

Complete model of a spherical gravitational wave detector with capacitive transducers: Calibration and sensitivity optimization. Phys. Rev. D 75, 022002 (2007)

Last update: March 21, 2014