Ghost Particles

High-energy subatomic particles nicknamed “ghost particles” for their ability to pass through just about anything can be stopped, scientists have confirmed.

Doing the stopping is IceCube, a block of extremely clear ice one cubic kilometre in size and 1.5 to two kilometres below the surface of earth, where it is very dark and high pressures keep the ice clear and bubble-free. The ice is embedded with 5,160 sensors that detect very faint amounts of light.

Neutrinos are detected when they interact with the ice itself as they pass through the detectors. When that happens, Grant said, they produce a charged particle such as an electron. Typically, light travels fastest in a vacuum and more slowly in ice. But a particle produced by a neutrino interacting with the ice travels faster than the typical speed of light in ice.

When it does that, a burst of blue light, known as Cherenkov radiation, is produced. Grant described it as “almost the optical equivalent of sonic boom.”

The higher energy the neutrino, the more ice it lights up. The researchers use that to detect each neutrino and calculate its energy.


Cloud storage

Cloud Storage is a model of data storage in which the digital data is stored in logical pools, the physical storage spans multiple servers, and the physical environment is typically owned and managed by a hosting company. These cloud storage providers are responsible for keeping the data available and accessible, and the physical environment protected and running. People and organizations buy or lease storage capacity from the providers to store user, organization, or application data.

Cloud storage services may be accessed through a co-located cloud computer service, a web service or by applications such as cloud desktop storage or content management systems.

(Subject to revision as this layman poster learns more!)