JPS58109872A - Radiation quantity monitor - Google Patents
Radiation quantity monitorInfo
- Publication number
- JPS58109872A JPS58109872A JP20840981A JP20840981A JPS58109872A JP S58109872 A JPS58109872 A JP S58109872A JP 20840981 A JP20840981 A JP 20840981A JP 20840981 A JP20840981 A JP 20840981A JP S58109872 A JPS58109872 A JP S58109872A
- Authority
- JP
- Japan
- Prior art keywords
- electrode plates
- radiation dose
- plates
- radiation quantity
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J47/00—Tubes for determining the presence, intensity, density or energy of radiation or particles
- H01J47/02—Ionisation chambers
Abstract
Description
【発明の詳細な説明】
この発明は、放射線測定のための放射線線量モニタに関
するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a radiation dose monitor for measuring radiation.
従来この種の線量モニタとしては第１図に示すものがあ
った。図において、（１）は電極板支持台、（２１＋３
１は放射線線量の測定のための平行平板形の第１、第２
の電極板であり、該両電極板（２＋ ＋３１の両端はと
もに上記支持台（１）により固定されている。また（４
）は上記支持台（１）を支持する支持ケース、（５１＋
６１は支持ケース（４）の両端にそれぞれ取付けられた
コネクタ、＋７１ ＋８１は上記電極板＋２１ （３１
とコネクタｆ５１ ＋６１とをそれぞれ接続しているリ
ード線である。A conventional dose monitor of this type is shown in FIG. In the figure, (1) is an electrode plate support stand, (21+3
1 is a parallel plate-shaped first and second plate for measuring radiation dose.
Both ends of the electrode plates (2+ +31) are fixed by the support base (1).
) is a support case that supports the support stand (1), (51+
61 are connectors attached to both ends of the support case (4), +71 and +81 are the electrode plates +21 (31
These are lead wires connecting the connectors f51 and f51 to the connectors f51 and f61, respectively.
次に動作について説明する。Next, the operation will be explained.
第１電極板（２）にはリード線（７）およびコネクタ（
５）を介して高電圧が印加されている。そのため放射線
が第１．第２の電極板（２１＋３１間の空間領域を通過
すると、空気が電離しイオン化される。そしてこのイオ
ンが第２の電極板（３）に集められてリード線（８）お
よびコネクタ（６）を介して電流が流れる。この電流は
放射線の線量と相関関係を示すため、この電流を検出す
ることにより、本装置を放射線線量の測定器として使用
できる。The first electrode plate (2) has a lead wire (7) and a connector (
5) A high voltage is applied through. Therefore, radiation is the first. When the air passes through the spatial region between the second electrode plate (21+31), the air is ionized and ionized.The ions are then collected on the second electrode plate (3) and connect the lead wire (8) and the connector (6). A current flows through the device.Since this current shows a correlation with the radiation dose, by detecting this current, the present device can be used as a radiation dose measuring device.
従来の放射線線量モニタは電極板が固定されているため
、温度により電極板がそったり、へこんだりし、両電極
板により形成される空間領域が変化する。その結果放射
線線量は一定でも検出される電流は空間領域との間に相
関関係を持っているため、温度変動が生じると正確な測
定ができないという欠点があった。Since the electrode plates of conventional radiation dose monitors are fixed, the electrode plates warp or dent due to temperature, and the spatial area formed by both electrode plates changes. As a result, even if the radiation dose is constant, the detected current has a correlation with the spatial area, so if temperature fluctuations occur, accurate measurements cannot be made.
この発明は上記のような従来のものの欠点を除去するた
めになされたもので、電極板の固定を両電極板とも片側
固定とすることにより、温度による電極板の膨張や収縮
を吸収し、空間領域の間隔を常に一定にして正確な測定
ができるようにした放射線線量モニタを提供することを
目的としている。This invention was made in order to eliminate the drawbacks of the conventional ones as described above. By fixing both electrode plates on one side, it absorbs the expansion and contraction of the electrode plates due to temperature and saves space. It is an object of the present invention to provide a radiation dose monitor that enables accurate measurement by always keeping the interval between regions constant.
以Ｆこの発明の一実施例を図について説明する。Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
′＄２図において、＋２１ ＋３１は第１．第２の電極
板、（１）は両電極板ｆ２１ ＋３１を固定している支
持台であり、（９）は両電極板＋２１ ＋３１を固定し
ていない絶縁台である。'In the $2 diagram, +21 +31 is the first. The second electrode plate (1) is a support stand to which both electrode plates f21 +31 are fixed, and (9) is an insulating stand to which both electrode plates +21 +31 are not fixed.
次に動作について説明する。Next, the operation will be explained.
両電極板＋２） ＋３１は支持台（１）により片側固定
されているため温度による膨張や収縮があっても電極板
＋２１ ＋３１の他端は同一方向に移動するので、電極
板（２）（３）の移動による空間領域への影響はない。Since both electrode plates +2) +31 are fixed on one side by the support base (1), even if they expand or contract due to temperature, the other ends of the electrode plates +21 and +31 will move in the same direction. ) movement has no effect on the spatial domain.
このため温度によるイオン電流の変化はなく、イオン電
流は安定している。Therefore, there is no change in the ion current due to temperature, and the ion current is stable.
なお上記実施例では、放射線線量モニタについて説明し
たが、それ以外の装置たとえば空間型荷置を測定する容
量計であってもよく、上記実施例と同様の効果を奏する
。In the above embodiment, a radiation dose monitor has been described, but other devices such as a capacitance meter for measuring space-type cargo storage may be used, and the same effects as in the above embodiment can be obtained.
以上のように、この発明によれば、２枚の電極板を片側
固定するように構成したので、温度による膨張や収縮を
防止でき、測定のばらつきがなく、非常に安定した放射
線線量の測定ができる。またこの放射線線量モニタは人
体に対する放射線照射量を測定するものであるので、そ
の測定精度が上がることは安全保護対策上重大な効果が
ある。As described above, according to the present invention, since the two electrode plates are configured to be fixed on one side, expansion and contraction due to temperature can be prevented, there is no measurement variation, and very stable radiation dose measurement can be achieved. can. Furthermore, since this radiation dose monitor measures the amount of radiation irradiated to the human body, increasing the measurement accuracy has a significant effect in terms of safety protection measures.
第１図は従来の放射線線量モら夕の断面側面図、第２図
はこの発明の一実施例による放射線線量モニタの断面側
面図である。
（１）・・・支持台、＋２１ （３１・・・電極板、（
９）・・・絶縁台。FIG. 1 is a cross-sectional side view of a conventional radiation dose monitor, and FIG. 2 is a cross-sectional side view of a radiation dose monitor according to an embodiment of the present invention. (1)... Support stand, +21 (31... Electrode plate, (
9)...Insulation stand.
Claims (1)
の電極板と、この２枚の電極板の一端を固定する支持台
と、上記２枚の電極板の他端を固定せずに相互に絶縁し
上記電極板の温度変化による移動を許す絶縁台とを備え
たことを特徴とする放射線線量モニタ。(1) Two parallel plate-shaped electrode plates for measuring radiation dose, a support stand that fixes one end of these two electrode plates, and a support stand that fixes the other end of the two electrode plates without fixing them. A radiation dose monitor comprising: an insulating stand that is mutually insulated and allows the electrode plates to move due to temperature changes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20840981A JPS58109872A (en) | 1981-12-23 | 1981-12-23 | Radiation quantity monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20840981A JPS58109872A (en) | 1981-12-23 | 1981-12-23 | Radiation quantity monitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58109872A true JPS58109872A (en) | 1983-06-30 |
Family
ID=16555756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20840981A Pending JPS58109872A (en) | 1981-12-23 | 1981-12-23 | Radiation quantity monitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58109872A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6731451B2 (en) | 1994-02-18 | 2004-05-04 | Hitachi, Ltd. | Information management apparatus |
| JP2010054309A (en) * | 2008-08-27 | 2010-03-11 | Mitsubishi Heavy Ind Ltd | Radiotherapy apparatus using transmission type dosimeter |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54145586A (en) * | 1978-05-04 | 1979-11-13 | Japan Atom Energy Res Inst | Radiation ionization chamber |
-
1981
- 1981-12-23 JP JP20840981A patent/JPS58109872A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54145586A (en) * | 1978-05-04 | 1979-11-13 | Japan Atom Energy Res Inst | Radiation ionization chamber |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6731451B2 (en) | 1994-02-18 | 2004-05-04 | Hitachi, Ltd. | Information management apparatus |
| US7706541B2 (en) | 1994-02-18 | 2010-04-27 | Fipa Frohwitter Intellectual Property Ag | Information management apparatus |
| JP2010054309A (en) * | 2008-08-27 | 2010-03-11 | Mitsubishi Heavy Ind Ltd | Radiotherapy apparatus using transmission type dosimeter |
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