Scintillation optical fibre device for collecting ionizing radiation

A device (1) for collecting ionizing radiation, comprising:

• an opaque sheath (3) with first and second ends (10, 15);
• a scintillating element (4) housed inside the opaque sheath, having a first end (7) suitable for receiving ionizing radiation and a second end (14) opposite its first end, the scintillating element being arranged to convert the ionizing radiation received via its first end into light signals and to deliver said signals through its second end;
• filter means (9) placed at the first end (10) of the sheath (3) to prevent at least external photons (ν) gaining access to the first end (7) of the scintillating element (4);
• and
• first connection means (16;
• 22) at the second end (14) of the scintillating element (4) and suitable for connection to light guide means (2) to enable said second end (14) of the scintillating element to be coupled to a light guide (18) of said light guide means,
• wherein said filter means (9) are made in the form of an endpiece having a first material in sheet form (12) presenting weight lying in the range 40 g/m2 to 300 g/m2, and in particular black paper.

An assembly for collecting ionizing radiation, comprising:

• light guide means (2) suitable for being connected to a device for collecting ionizing radiation (1), the device for collecting ionization radiation comprising, an opaque sheath (3) with first and second ends (10, 15);
• a scintillating element (4) housed inside the opaque sheath, having a first end (7) suitable for receiving ionizing radiation and a second end (14) opposite its first end, the scintillating element being arranged to convert the ionizing radiation received via its first end into light signals and to deliver said signals through its second end;
• filter means (9) placed at the first end (10) of the sheath (3) to prevent at least external photons (ν) gaining access to the first end (7) of the scintillating element (4);
• and
• first connection means (16;
• 22) at the second end (14) of the opaque sheath and suitable for connection to light guide means (2) to enable said second end (14) of the scintillating element to be coupled to a light guide (18) of said light guide means.