Alpha radiation detector having an optical sensor for measuring the radon concentration in the ambient air
AssigneeLivair GmbH
InventorRudolf Waltl
Life of this patent
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Abstract
The invention relates to an alpha radiation detector (1) for measuring the radon concentration in the ambient air, comprising a housing (10) having a base (5) on which a hood (2) is arranged, which hood has a chamber (9) which is located therein, wherein the opaque housing (10) is designed in such a way that ambient air can penetrate into the chamber (9) from the outside, the alpha radiation detector further comprising an optical sensor (4). According to the invention, the hood (2) has an inner wall which is provided at least in part with a scintillation material (3) which generates light pulses (8) upon impingement of alpha particles (7), which light pulses are sensed by the optical sensor (4).
Claims15
An alpha radiation detector for measuring radon concentration in ambient air, the alpha radiation detector comprising:
- a housing having a base on which there is arranged a hood having a chamber which is located therein, the housing being configured in such a way that ambient air can penetrate into the chamber from outside, and
- an optical sensor;
- the hood having a first portion having an inner wall, which is provided with a scintillation material which generates light pulses upon impingement of alpha particles, which light pulses are sensed by the optical sensor, wherein the hood has a second portion formed as a ring which is made of a material that is impermeable to light but permeable to gas, so that radon gas can penetrate into the chamber from outside through a wall of the ring in a direction that is transverse to a circumferential direction of the ring, wherein the first portion and the second portion are arranged on top of each other.
An alpha radiation detector for measuring radon concentration in ambient air, the alpha radiation detector comprising:
- a housing having a base on which there is arranged a hood having a chamber which is located therein, the housing being configured in such a way that ambient air can penetrate into the chamber from outside, and
- an optical sensor;
- wherein:
- the base is made of a printed circuit board material and is equipped with
- an evaluation electronics;
- the optical sensor is arranged within the chamber, on the base;
- the optical sensor is a silicon photomultiplier;
- and
- the base has at least one aperture, which is closed by a material that is impermeable to light but permeable to gas, so that radon gas can pass into the chamber from outside, through the aperture.
An alpha radiation detector for measuring radon concentration in ambient air, the alpha radiation detector comprising:
- a housing having a base on which there is arranged a hood having a chamber which is located therein, the housing being configured in such a way that ambient air can penetrate into the chamber from outside, and
- an optical sensor,
- wherein the hood includes:
- an inner wall having a scintillation material which generates light pulses upon impingement of alpha particles, the light pulses being sensed by the optical sensor;
- an annular portion which is made of a material that is impermeable to light but permeable to gas, so that radon gas can penetrate into the chamber from outside;
- and
- a first portion which is impermeable to light and a second portion which is impermeable to light, but permeable to gas.
Dependencies are inferred from the claim text.