Columnar defects acting as passive internal field detectors

Columnar defects acting as passive internal field detectors

We have studied the angular dependence of the irreversible magnetization of several YBa2Cu3O7 and 2H-NbSe2 single crystals with columnar defects tilted off the c axis. At high magnetic fields, the irreversible magnetization M i(Q) exhibits a well-known maximum when the applied field is parallel to the tracks. As the field is decreased below H;0.02Hc2, the peak shifts away from the tracks’ direc...

Sensitivity to Thoron on Passive Radon Detectors

INTRODUCTION Although a lot of studies on radon have been done for a long time, there are few reports on thoron. It was considered that the presence of thoron could be negligible because of its own quantity compared to that of radon. However, recent studies have shown high thoron levels in our living environment (1-4). In particular, high thoron concentrations were occasionally observed in some...

Aligned carbon nanotubes as polarization-sensitive, molecular near-field detectors.

Near-field scanning optical microscopes are widely used in imaging of subwavelength features in various material systems and nanostructures. For a variety of applications, polarization-sensitive near-field probes can provide valuable information on the nature and symmetry of the imaged nanoparticles and emitters. Conventional near-field optical microscopy lacks in-plane polarization sensitivity...

Thoron spike test for passive radon detectors.

Diffractive Optical Elements for Passive Infrared Detectors

Complex diffractive lens arrays for passive infrared detection systems have been designed and fabricated by laser beam writing and injection moulding. Continuous relief profiles with depths up to 20 μm were originated, characterised and replicated. 1999 Optical Society of America OCIS codes: (050.1970, 120.1880)