US 11,231,507 B2 · Radiation monitor

Abstract

A screw compressor includes a screw rotor, a casing, and a fluid supply portion to supply fluid in a membrane form into a compression chamber in the casing. The screw rotor has a male and female rotors. A male bore covering the male rotor and a female bore covering the female rotor are formed on the inner surface of the casing. An intersection line, on a higher pressure side, of the male and female bores is defined as a compression cusp. In a bore development view, a trajectory made by the first intersection of an extension line of a female lobe ridge and a male lobe ridge being moved, along with the rotation of the male and female rotors, is defined as a trajectory line. An opening of the fluid supply section to the compression chamber is positioned between the compression cusp and the trajectory line.

Claims16

Dependent claims

A radiation monitor comprising:

a radiation detecting unit including a phosphor that emits light responsive to incident radiation;
an optical fiber that transmits the light emitted from the phosphor of the radiation detecting unit;
a photodetector that converts single photons, the single photons making up the light transmitted from the optical fiber, to electrical pulse signals;
a counter that counts the electrical pulse signals converted by the photodetector;
a database configured to associate counting rates of electrical pulse signals with dose rates of radiation;
and
an arithmetic section configured to convert a counting rate of electrical pulse signals, the counting rate having been counted by the counter, to a dose rate of radiation by using the database, wherein
the phosphor contains an additive that emits photons when energy is applied, and
the additive has a concentric concentration gradient.

6 more elements

Dependencies are inferred from the claim text.

Radiation monitor

Life of this patent

Radiation monitor

Life of this patent

Abstract

Claims16