JPH065660Y2 - Scintillation detector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial Application Field" The present invention relates to a scintillation detector in which a scintillator is coupled to a photomultiplier tube.

"Prior Art" In general, a scintillation detector, as shown in Fig. 6, emits light when radiation is incident (1).
And a photodetector (2) such as a photomultiplier for detecting the emitted light. Conventionally, the scintillator (1) and the photodetector (2) have been simply coupled with a coupling agent (3) having a light transmitting property, such as silicon grease. Especially, when a coupling agent having high adhesiveness is required, a silicone RTV rubber has been used.

[Problems to be solved by the device] The scintillator (1) can be used almost semipermanently and is expensive, while the photodetector (2) is often replaced after a certain period of use. However, the coupling agent (3)
When a silicon RTV rubber having high adhesion is used as the above, it is extremely difficult to separate the scintillator (1) and the photodetector (2). For example, when peeling with a sharp blade, the expensive scintillator (1) may be damaged or damaged.

An object of the present invention is to obtain a scintillator (1) and a photodetector which can be easily replaced.

"Means for Solving the Problem" The present invention is one in which a scintillator is bonded to the photocathode of a photodetector by a coupling agent, and a stripping fine wire is sandwiched between the bonding surfaces.

"Operation" Nylon threads, piano wires, and other thin wires for peeling are sandwiched together with the coupling agent on the bonding surface to bond them together. Peel off the photodetector. The coupling agent remaining after peeling is scraped off by polishing or the like.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, (2) is a photodetector, and a thin wire (5) with a thickness of about 0.1 mm is sandwiched between the photocathode (4) of the photodetector (2) and the cup. Scintillator with ring agent (3)
Attach (1). At this time, the fine line (5) is positioned as close as possible to the end of the scintillator (1) so as not to interfere with the transmission of light. Further, the gap between the scintillator (1) and the photodetector (2) is kept constant, and it takes about one day to cure the coupling agent (3), but the scintillator (1) should not tilt during that time. Therefore, the thin wire (5) also acts as a spacer at both ends.

When removing the scintillator (1) from the photodetector (2), use the thin wire (5).
Pull so that the coupling agent (3) is cut or peeled by holding both ends of. The remaining coupling agent (3) is ground with a file or grindstone.

Although the thin wire (5) is arranged in the longitudinal direction of the scintillator (1) in the embodiment shown in FIGS. 1 and 2, it should be arranged in the lateral direction of the scintillator (1) as shown in FIG. May be.

Also, as shown in FIG. 4, only one thin wire (5) may be used. In this case, one end is fixed to the photodetector (2) and the other end is rotated in the direction of the arrow. Alternatively, the coupling agent (3) may be cut or peeled off.

FIG. 5 shows an example in which a heating wire such as a nichrome wire is used as the thin wire (5). And the scintillator (1) is the photodetector
When peeling from (5), insert the switch (6) and connect the thin wire (5) to the power supply (7).
When coupled to, the fine wire (5) will generate heat and the coupling agent (3) will be easily peeled off.
Pull the coupling agent (3) so as to cut or peel it.

[Advantages of the Invention] Since the present invention is configured as described above, the scintillator replacement work can be performed easily and reliably with almost no effect on the performance of the scintillation detector.

[Brief description of drawings]

FIG. 1 is a perspective view of a first embodiment of a scintillation detector according to the present invention, FIG. 2 is a side view of the same as above, FIG. 3 is a plan view of a second embodiment of the present invention, and FIG. 3 is a plan view of the third embodiment, FIG. 5 is a plan view of a fourth embodiment of the present invention, and FIG. 6 is a side view of a conventional example. (1) ... Scintillator, (2) ... Photodetector, (3) ... Coupling agent, (4) ... Photocathode, (5) ... Peeling fine wire, (6) ... Switch, (7) ... Power supply.

Claims (3)

[Scope of utility model registration request] 1. A scintillation detector comprising a photodetector and a scintillator bonded to the photocathode with a coupling agent, wherein a stripping fine wire is sandwiched between the bonding surfaces. 2. The scintillation detector according to claim 1, wherein the stripping fine wire is made of nylon thread or piano wire and also serves as a spacer for keeping the gap constant. 3. The scintillation detector according to claim 1, wherein the stripping fine wire is made of a nichrome wire, and the stripping fine wire is coupled to a power source to generate heat during stripping.