JP2016090503A - Radiation detector support mount - Google Patents

Radiation detector support mount Download PDF

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JP2016090503A
JP2016090503A JP2014228000A JP2014228000A JP2016090503A JP 2016090503 A JP2016090503 A JP 2016090503A JP 2014228000 A JP2014228000 A JP 2014228000A JP 2014228000 A JP2014228000 A JP 2014228000A JP 2016090503 A JP2016090503 A JP 2016090503A
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detector
radiation detector
radiation
support
holding unit
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JP6501139B2 (en
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英輔 板津
Eisuke Itatsu
英輔 板津
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Seiko EG&G Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a radiation detector support mount that can be used for outdoor measurements, offers good portability and set-up ease, and minimizes attenuation of radiation.SOLUTION: A radiation detector support mount 10 includes: a detector holding unit 12 that holds a radiation detector 11, and a support unit 13 designed to support the detector holding unit 12 and made of a carbon material. The detector holding unit 12 is capable of altering the direction of the radiation detector 11 over an elevation/depression angle range of at least 0 to 90°. The detector holding unit 12 is detachable from the support unit 13. The detector holding unit 12 holds the radiation detector 11 at a position offset from the center of a head portion 31 of the support unit 13 in a horizontal direction H. The detector holding unit 12 holds the radiation detector 11 such that an end cap housing 21a of the radiation detector 11 is kept at a distance from the head portion 31 of the support unit 13.SELECTED DRAWING: Figure 1

Description

この発明は、放射線検出器支持架台に関する。   The present invention relates to a radiation detector support frame.

従来、屋外での環境試料（例えば、地表面に沈着した放射性同位元素など）の測定に用いる放射線検出器を支持する支持架台が知られている（例えば、非特許文献１参照）。   Conventionally, a support frame that supports a radiation detector used for measuring an outdoor environmental sample (for example, a radioisotope deposited on the ground surface) is known (see, for example, Non-Patent Document 1).

「放射能測定法シリーズ ３３ ゲルマニウム半導体検出器を用いたｉｎ−ｓｉｔｕ測定法」、文部科学省、平成２０年３月、ｐ.７−８"Radioactivity measurement series 33 In-situ measurement method using germanium semiconductor detector", Ministry of Education, Culture, Sports, Science and Technology, March 2008, p.7-8

ところで、上記従来技術に係る支持架台を用いて環境試料を測定する際に、支持架台が鉄またはアルミニウムなどの金属の材料により形成されていると、環境試料と放射線検出器との間に介在する支持架台の一部（例えば、脚部など）による放射線の減弱が増大するという問題が生じる。このような問題に対して、屋外での測定に対応して運搬容易性および設置容易性を確保しつつ、放射線の減弱を抑制することが望まれている。   By the way, when an environmental sample is measured using the support frame according to the above-described conventional technology, if the support frame is formed of a metal material such as iron or aluminum, it is interposed between the environmental sample and the radiation detector. There arises a problem that the attenuation of radiation by a part of the support frame (for example, a leg) increases. In order to solve such problems, it is desired to suppress the attenuation of radiation while ensuring the ease of transportation and installation in response to outdoor measurements.

本発明は上記事情に鑑みてなされたもので、運搬容易性および設置容易性を確保しつつ、放射線の減弱を抑制することが可能な放射線検出器支持架台を提供することを目的としている。   This invention is made | formed in view of the said situation, and it aims at providing the radiation detector support stand which can suppress attenuation | damping of a radiation, ensuring the ease of conveyance and installation ease.

上記課題を解決して係る目的を達成するために、本発明は以下の態様を採用した。
（１）本発明の一態様に係る放射線検出器支持架台は、放射線検出器を保持する検出器保持部と、前記検出器保持部を支持する炭素材料から形成される支持部と、を備える。 In order to solve the above problems and achieve the object, the present invention employs the following aspects.
(1) The radiation detector support frame which concerns on 1 aspect of this invention is provided with the detector holding part which hold | maintains a radiation detector, and the support part formed from the carbon material which supports the said detector holding part.

（２）上記（１）に係る放射線検出器支持架台では、前記検出器保持部は、少なくとも０°から−９０°の仰俯角範囲で前記放射線検出器の向きを変更可能である。 (2) In the radiation detector support frame according to the above (1), the detector holding unit can change the orientation of the radiation detector in an elevation angle range of at least 0 ° to −90 °.

（３）上記（１）または（２）に係る放射線検出器支持架台では、前記検出器保持部は、前記支持部に着脱可能である。 (3) In the radiation detector support frame according to the above (1) or (2), the detector holding part is detachable from the support part.

（４）上記（１）から（３）の何れか１つに係る放射線検出器支持架台では、前記検出器保持部は、前記支持部の頭部の中心位置から水平方向にずれた位置で前記放射線検出器を保持する。 (4) In the radiation detector support gantry according to any one of (1) to (3), the detector holding unit is in a position shifted in the horizontal direction from the center position of the head of the support unit. Hold the radiation detector.

（５）上記（１）から（４）の何れか１つに係る放射線検出器支持架台では、前記検出器保持部は、前記放射線検出器のエンドキャップを前記支持部の頭部から離間させて前記放射線検出器を保持する。 (5) In the radiation detector support gantry according to any one of (1) to (4) above, the detector holding unit is configured to separate the end cap of the radiation detector from the head of the support unit. The radiation detector is held.

上記（１）に記載の態様に係る放射線検出器支持架台によれば、炭素材料から形成される支持部を備えることにより、環境試料と放射線検出器との間に支持部の一部が介在する場合であっても、金属材料から形成される支持部に比べて放射線の減弱を抑制することができる。さらに、炭素材料から形成される支持部を、金属材料から形成される支持部に比べて軽量化することができ、運搬容易性および設置容易性を確保することができる。   According to the radiation detector support frame according to the aspect described in (1) above, by including the support portion formed of the carbon material, a part of the support portion is interposed between the environmental sample and the radiation detector. Even if it is a case, attenuation of a radiation can be suppressed compared with the support part formed from a metal material. Furthermore, the support part formed from a carbon material can be reduced in weight compared with the support part formed from a metal material, and the ease of conveyance and installation can be ensured.

上記（２）に記載の態様に係る放射線検出器支持架台によれば、測定対象に応じて放射線検出器の姿勢を最適化することができる。   According to the radiation detector support frame according to the aspect described in (2) above, the posture of the radiation detector can be optimized according to the measurement target.

上記（３）に記載の態様に係る放射線検出器支持架台によれば、運搬容易性および設置容易性を、より一層、向上させることができる。   According to the radiation detector support frame according to the aspect described in (3) above, the ease of transport and the ease of installation can be further improved.

上記（４）に記載の態様に係る放射線検出器支持架台によれば、環境試料と放射線検出器との間に支持部の一部が介在することを抑制し、支持部による放射線の減弱を抑制することができる。   According to the radiation detector support frame according to the aspect described in (4) above, it is possible to suppress a part of the support portion between the environmental sample and the radiation detector, and to suppress the attenuation of radiation by the support portion. can do.

上記（５）に記載の態様に係る放射線検出器支持架台によれば、支持部の頭部による放射線の減弱を抑制することができる。   According to the radiation detector support frame according to the aspect described in (5) above, it is possible to suppress attenuation of radiation by the head portion of the support portion.

本発明の実施形態に係る放射線検出器支持架台の斜視図。The perspective view of the radiation detector support stand which concerns on embodiment of this invention. 本発明の実施形態の変形例に係る放射線検出器支持架台の斜視図。The perspective view of the radiation detector support stand which concerns on the modification of embodiment of this invention. 本発明の実施形態の変形例に係る放射線検出器支持架台における検出器支持部の下部の一部を示す側面図。The side view which shows a part of lower part of the detector support part in the radiation detector support stand concerning the modification of embodiment of this invention.

以下、本発明の一実施形態に係る放射線検出器支持架台について添付図面を参照しながら説明する。   Hereinafter, a radiation detector support frame according to an embodiment of the present invention will be described with reference to the accompanying drawings.

実施形態による放射線検出器支持架台１０は、図１に示すように、放射線検出器１１を保持する検出器保持部１２と、検出器保持部１２を支持する支持部１３と、を備えている。さらに、放射線検出器支持架台１０は、屋内での放射線検出器１１の較正時などにおいて用いられるように着脱可能な線源固定用治具１４を備えている。
なお、図１においては、線源固定用治具１４を図示しているが、屋外などでの測定時においては、線源固定用治具１４は取り外される。一方、屋内での放射線検出器１１の較正時などにおいて線源固定用治具１４は装着される。 As illustrated in FIG. 1, the radiation detector support base 10 according to the embodiment includes a detector holding unit 12 that holds the radiation detector 11 and a support unit 13 that supports the detector holding unit 12. Furthermore, the radiation detector support base 10 includes a radiation source fixing jig 14 that can be attached and detached so as to be used when the radiation detector 11 is calibrated indoors.
In FIG. 1, the radiation source fixing jig 14 is illustrated, but the radiation source fixing jig 14 is removed during measurement outdoors. On the other hand, the radiation source fixing jig 14 is mounted when the radiation detector 11 is calibrated indoors.

放射線検出器１１は、例えばゲルマニウム半導体検出器やシリコン半導体検出器などの半導体検出器である。放射線検出器１１は、クライオスタット２１の内部を電気的に冷却するスターリング冷凍機などの電気冷却装置２２を備えている。放射線検出器１１は、クライオスタット２１において、放射線の入射窓（図示略）を有するエンドキャップハウジング２１ａの内部の真空領域に、放射線に対して有感なゲルマニウム結晶やシリコン結晶などの半導体結晶（図示略）を保持している。半導体結晶に形成された結晶電極（図示略）はエンドキャップハウジング２１ａの内部に収容された電荷型前置増幅器（図示略）に接続されている。電荷型前置増幅器は、半導体結晶に入射した放射線のエネルギーに応じた波高値を有する出力信号パルスを出力する。   The radiation detector 11 is a semiconductor detector such as a germanium semiconductor detector or a silicon semiconductor detector. The radiation detector 11 includes an electric cooling device 22 such as a Stirling refrigerator that electrically cools the inside of the cryostat 21. The radiation detector 11 includes a semiconductor crystal (not shown) such as a germanium crystal or a silicon crystal sensitive to radiation in a vacuum region inside an end cap housing 21a having a radiation entrance window (not shown) in the cryostat 21. ). A crystal electrode (not shown) formed on the semiconductor crystal is connected to a charge preamplifier (not shown) housed in the end cap housing 21a. The charge type preamplifier outputs an output signal pulse having a peak value corresponding to the energy of radiation incident on the semiconductor crystal.

検出器保持部１２は、いわゆる自由雲台などである。検出器保持部１２は、支持部１３に着脱可能に固定されている。検出器保持部１２は、放射線検出器１１を着脱可能に保持しながら、少なくとも０°から−９０°の仰俯角範囲で放射線検出器１１の向き（エンドキャップハウジング２１ａの基端側から先端側に向かう方向）を変更可能である。
なお、検出器保持部１２は、少なくとも０°から−９０°の仰俯角範囲を有しているので、放射線検出器１１の取付姿勢を変更（例えば、上下反転など）することによって、放射線検出器１１の向きを０°から＋９０°の仰俯角範囲に設定してもよい。 The detector holding unit 12 is a so-called free pan head or the like. The detector holding part 12 is detachably fixed to the support part 13. The detector holding unit 12 holds the radiation detector 11 in a detachable manner, and at the elevation angle range of at least 0 ° to −90 ° (from the proximal end side to the distal end side of the end cap housing 21a). The direction of heading) can be changed.
Since the detector holding unit 12 has an elevation angle range of at least 0 ° to −90 °, the radiation detector can be changed by changing the mounting posture of the radiation detector 11 (for example, upside down). The direction of 11 may be set to an elevation angle range of 0 ° to + 90 °.

支持部１３は、脚頭部３１と、３つまたは４つの脚部３２と、を備えている。なお、脚部３２の数は、３または４に限定されない。支持部１３における少なくとも脚部３２は、炭素材料（例えば、炭素繊維など）によって形成されている。
脚頭部３１の外形は、板状に形成されている。脚頭部３１は、表面上に載置される検出器保持部１２を解除可能に固定する。脚頭部３１の中心位置は、水平方向Ｈにおいて、検出器保持部１２が放射線検出器１１を保持する位置に対してずれている。これにより検出器保持部１２によって保持される放射線検出器１１の検出部（例えば、半導体結晶など）の位置は、水平方向Ｈにおいて脚頭部３１の中心位置からずれている。検出器保持部１２は、放射線検出器１１のエンドキャップハウジング２１ａを、脚頭部３１から離間させて保持している。
例えば４つの脚部３２は、脚頭部３１を支持している。各脚部３２の基端部（第１端部）３２ａは、脚頭部３１に設けられた支持部３１ａに締結部材３１ｂによって回転可能に固定されている。各脚部３２は、支持部３１ａに対して回転する第１端部３２ａを備えることによって、脚頭部３１に対する角度を変更可能に取り付けられている。各脚部３２は、固定部材３２ｂによって固定位置を変更可能な複数の棒状部材３２ｃを備えることによって、伸縮可能に形成されている。 The support portion 13 includes a leg head portion 31 and three or four leg portions 32. The number of leg portions 32 is not limited to 3 or 4. At least the leg portion 32 in the support portion 13 is formed of a carbon material (for example, carbon fiber).
The outer shape of the leg head 31 is formed in a plate shape. The leg head 31 releasably fixes the detector holding unit 12 placed on the surface. The center position of the leg head 31 is shifted in the horizontal direction H from the position where the detector holding unit 12 holds the radiation detector 11. As a result, the position of the detector (for example, a semiconductor crystal) of the radiation detector 11 held by the detector holder 12 is shifted from the center position of the leg head 31 in the horizontal direction H. The detector holding unit 12 holds the end cap housing 21 a of the radiation detector 11 separately from the leg head 31.
For example, the four leg portions 32 support the leg head 31. A base end portion (first end portion) 32a of each leg portion 32 is fixed to a support portion 31a provided on the leg head portion 31 by a fastening member 31b so as to be rotatable. Each leg part 32 is attached so that the angle with respect to the leg head part 31 can be changed by including a first end part 32a that rotates relative to the support part 31a. Each leg portion 32 is formed to be extendable by being provided with a plurality of rod-like members 32c whose fixing positions can be changed by a fixing member 32b.

線源固定用治具１４は、屋内での放射線検出器１１の較正時などにおいて脚頭部３１の下部に着脱可能に固定されている。線源固定用治具１４の外形は、基端部（第１端部）１４ａから先端部（第２端部）１４ｂに向かって伸びる棒状に形成されている。線源固定用治具１４は、炭素材料（例えば、炭素繊維など）によって形成されている。線源固定用治具１４の第１端部１４ａは、脚頭部３１の下部に設けられた治具支持部３１ｃに締結部材３１ｄによって回転可能に固定されている。線源固定用治具１４の第２端部１４ｂは、放射線検出器１１の効率較正用の標準線源を固定する。線源固定用治具１４の第１端部１４ａの回転軸は、所定姿勢（放射線検出器１１の向きが鉛直方向Ｖの下方の状態）の放射線検出器１１の検出部の中心（例えば、半導体結晶の中心など）を含んでいる。これにより線源固定用治具１４は、標準線源と放射線検出器１１の検出部との距離を所定の一定距離に維持しながら、放射線検出器１１の検出部と標準線源を結ぶ線と放射線検出器１１の中心軸とがなす角度を適宜に変更可能である。   The radiation source fixing jig 14 is detachably fixed to the lower portion of the leg head 31 when the radiation detector 11 is calibrated indoors. The external shape of the radiation source fixing jig 14 is formed in a rod shape extending from the base end portion (first end portion) 14a toward the tip end portion (second end portion) 14b. The radiation source fixing jig 14 is made of a carbon material (for example, carbon fiber). The first end portion 14 a of the radiation source fixing jig 14 is rotatably fixed to a jig support portion 31 c provided at the lower portion of the leg head portion 31 by a fastening member 31 d. The second end portion 14 b of the radiation source fixing jig 14 fixes a standard radiation source for efficiency calibration of the radiation detector 11. The rotation axis of the first end portion 14a of the radiation source fixing jig 14 is the center (for example, semiconductor) of the radiation detector 11 in a predetermined posture (the direction of the radiation detector 11 is below the vertical direction V). Crystal center). As a result, the radiation source fixing jig 14 maintains a distance between the standard radiation source and the detection unit of the radiation detector 11 at a predetermined constant distance, and a line connecting the detection unit of the radiation detector 11 and the standard radiation source. The angle formed by the central axis of the radiation detector 11 can be changed as appropriate.

上述したように、本実施形態による放射線検出器支持架台１０によれば、少なくとも脚部３２が炭素材料から形成される支持部１３を備えることにより、環境試料などの測定対象と放射線検出器１１との間に脚部３２の一部が介在する場合であっても、放射線の減弱を抑制することができる。さらに、炭素材料から形成される支持部１３を備えるので、金属材料から形成される支持部に比べて軽量化することができ、運搬容易性および設置容易性を確保することができる。   As described above, according to the radiation detector support gantry 10 according to the present embodiment, at least the leg portion 32 includes the support portion 13 formed of a carbon material, so that the measurement target such as an environmental sample, the radiation detector 11, and the like. Even when a part of the leg 32 is interposed between the two, the attenuation of radiation can be suppressed. Furthermore, since the support part 13 formed from a carbon material is provided, the weight can be reduced compared to the support part formed from a metal material, and the ease of transport and installation can be ensured.

また、放射線検出器１１を保持する検出器保持部１２を備えることにより、環境試料などの測定対象に応じて放射線検出器１１の姿勢を最適化することができる。さらに、支持部１３に着脱可能な検出器保持部１２を備えることにより、運搬容易性および設置容易性を、より一層、向上させることができる。さらに、水平方向Ｈにおいて脚頭部３１の中心位置からずれた位置で放射線検出器１１を保持する検出器保持部１２を備えるので、環境試料などの測定対象と放射線検出器１１との間に支持部１３の一部が介在することを抑制し、支持部１３による放射線の減弱を抑制することができる。さらに、放射線検出器１１のエンドキャップハウジング２１ａを脚頭部３１から離間させて保持する検出器保持部１２を備えるので、脚頭部３１による放射線の減弱を抑制することができる。   In addition, by including the detector holding unit 12 that holds the radiation detector 11, the posture of the radiation detector 11 can be optimized according to the measurement target such as an environmental sample. Furthermore, by providing the detector holding part 12 which can be attached to and detached from the support part 13, the ease of transport and the ease of installation can be further improved. Furthermore, since the detector holding unit 12 that holds the radiation detector 11 at a position shifted from the center position of the leg head 31 in the horizontal direction H is provided, it is supported between the measurement target such as an environmental sample and the radiation detector 11. It is possible to suppress a part of the portion 13 from being interposed, and to suppress the attenuation of radiation by the support portion 13. Furthermore, since the detector holding unit 12 that holds the end cap housing 21a of the radiation detector 11 away from the leg head 31 is provided, attenuation of radiation by the leg head 31 can be suppressed.

以下に、上述した実施形態の変形例について説明する。
上述した実施形態において、検出器保持部１２によって保持される放射線検出器１１の検出部（例えば、半導体結晶など）の位置は、水平方向Ｈにおいて脚頭部３１の中心位置からずれているとしたが、これに限定されない。例えば放射線検出器１１の向きが鉛直方向Ｖの下方または上方となる場合に、検出部（例えば、半導体結晶など）の位置が脚頭部３１の中心位置の下方または上方に配置されてもよい。 Below, the modification of embodiment mentioned above is demonstrated.
In the embodiment described above, the position of the detector (for example, a semiconductor crystal) of the radiation detector 11 held by the detector holder 12 is deviated from the center position of the leg head 31 in the horizontal direction H. However, it is not limited to this. For example, when the direction of the radiation detector 11 is below or above the vertical direction V, the position of the detector (for example, a semiconductor crystal) may be arranged below or above the center position of the leg head 31.

上述した実施形態において、検出器保持部１２は省略され、放射線検出器１１が直接的に支持部１３に着脱可能とされてもよい。
実施形態の変形例に係る放射線検出器支持架台１０は、図２および図３に示すように、放射線検出器１１を支持する検出器支持部４１と、線源固定用治具１４と、を備えている。
検出器支持部４１は、貫通孔５０が形成された台座５１と、台座５１に固定された４つの脚部５２と、を備えている。検出器支持部４１における少なくとも４つの脚部５２は、炭素材料（例えば、炭素繊維など）によって形成されている。
台座５１の外形は、板状に形成されている。台座５１は、表面上に載置される放射線検出器１１を解除可能に固定する。放射線検出器１１のクライオスタット２１は、鉛直方向Ｖの下方に向かって貫通孔５０に挿入され、エンドキャップハウジング２１ａを台座５１から下方に突出させている。放射線検出器１１の電気冷却装置２２は、台座５１の表面上に載置されている。
４つの脚部５２は、台座５１を支持している。各脚部５２の基端部（第１端部）５２ａは、台座５１に設けられた支持部５１ａに締結部材５１ｂによって回転可能に固定されている。各脚部５２は、支持部５１ａに対して回転する第１端部５２ａを備えることによって、台座５１に対する角度を変更可能に取り付けられている。各脚部５２は、固定部材５２ｂによって固定位置を変更可能な複数の棒状部材５２ｃを備えることによって、伸縮可能に形成されている。 In the embodiment described above, the detector holding unit 12 may be omitted, and the radiation detector 11 may be directly attached to and detached from the support unit 13.
As shown in FIGS. 2 and 3, the radiation detector support base 10 according to the modification of the embodiment includes a detector support portion 41 that supports the radiation detector 11 and a radiation source fixing jig 14. ing.
The detector support portion 41 includes a pedestal 51 in which a through hole 50 is formed, and four leg portions 52 fixed to the pedestal 51. The at least four legs 52 in the detector support portion 41 are formed of a carbon material (for example, carbon fiber).
The outer shape of the base 51 is formed in a plate shape. The pedestal 51 fixes the radiation detector 11 placed on the surface in a releasable manner. The cryostat 21 of the radiation detector 11 is inserted into the through-hole 50 downward in the vertical direction V, and the end cap housing 21 a protrudes downward from the pedestal 51. The electric cooling device 22 of the radiation detector 11 is placed on the surface of the pedestal 51.
The four legs 52 support the pedestal 51. A base end portion (first end portion) 52a of each leg portion 52 is rotatably fixed to a support portion 51a provided on the base 51 by a fastening member 51b. Each leg part 52 is attached so that the angle with respect to the base 51 can be changed by providing the 1st end part 52a rotated with respect to the support part 51a. Each leg portion 52 is formed to be extendable by being provided with a plurality of rod-shaped members 52c whose fixing positions can be changed by the fixing members 52b.

上述した実施形態において、支持部１３は、炭素材料によって形成される移動可能な台車などであってもよい。   In the embodiment described above, the support portion 13 may be a movable carriage formed of a carbon material.

本発明の実施形態は、例として提示したものであり、発明の範囲を限定することは意図していない。これら実施形態は、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことができる。これら実施形態やその変形は、発明の範囲や要旨に含まれると同様に、特許請求の範囲に記載された発明とその均等の範囲に含まれるものである。   The embodiments of the present invention are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

１０…放射線検出器支持架台、１１…放射線検出器、１２…検出器保持部、１３…支持部、１４…線源固定用治具、２１…クライオスタット、２１ａ…エンドキャップハウジング、３１…脚頭部、３２…脚部、４１…検出器支持部、５１…台座、５２…脚部   DESCRIPTION OF SYMBOLS 10 ... Radiation detector support stand, 11 ... Radiation detector, 12 ... Detector holding part, 13 ... Supporting part, 14 ... Radiation source fixing jig, 21 ... Cryostat, 21a ... End cap housing, 31 ... Leg head 32 ... Legs, 41 ... Detector support, 51 ... Base, 52 ... Legs

Claims (5)

放射線検出器を保持する検出器保持部と、
前記検出器保持部を支持する炭素材料から形成される支持部と、
を備える、
放射線検出器支持架台。 A detector holder for holding the radiation detector;
A support portion formed of a carbon material that supports the detector holding portion;
Comprising
Radiation detector support frame. 前記検出器保持部は、
少なくとも０°から−９０°の仰俯角範囲で前記放射線検出器の向きを変更可能である、
ことを特徴とする請求項１に記載の放射線検出器支持架台。 The detector holding unit is
The orientation of the radiation detector is changeable in an elevation angle range of at least 0 ° to -90 °;
The radiation detector support frame according to claim 1. 前記検出器保持部は、
前記支持部に着脱可能である、
ことを特徴とする請求項１または請求項２に記載の放射線検出器支持架台。 The detector holding unit is
It is detachable from the support part,
The radiation detector support frame according to claim 1, wherein the radiation detector support frame is provided. 前記検出器保持部は、
水平方向において前記支持部の頭部の中心位置からずれた位置で前記放射線検出器を保持する、
ことを特徴とする請求項１から請求項３の何れか１つに記載の放射線検出器支持架台。 The detector holding unit is
Holding the radiation detector at a position displaced from the center position of the head of the support in the horizontal direction;
The radiation detector support frame according to any one of claims 1 to 3, wherein the radiation detector support frame is provided. 前記検出器保持部は、
前記放射線検出器のエンドキャップを前記支持部の頭部から離間させて前記放射線検出器を保持する、
ことを特徴とする請求項１から請求項４の何れか１つに記載の放射線検出器支持架台。 The detector holding unit is
Holding the radiation detector by separating the end cap of the radiation detector from the head of the support;
The radiation detector support frame according to any one of claims 1 to 4, wherein the radiation detector support frame is provided.
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