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Main improvements of the 2nd-generation Tandetron compared with the old GIC(General Ionex Corporation)-Tandetron are : (1) a high intensity cesium sputter ion source is equipped with the new system, so that the ^\u003c14\u003eC counting rate is almost one order higher than that for the old system. In addition, since up to 59 targets can be loaded at a time, measurements can be conducted more efficiently. (2) carbon isotopes ^\u003c12\u003eC-, ^\u003c13\u003eC- and ^\u003c14\u003eC- are injected into a tandem accelerator simultaneously, by using a recombinator system, which will archive high accuracy measurements of the carbon isotope ratio. (3) the terminal voltage of the accelerator is 2.5MV, which gives the maximum yield in producing C^\u003c3+\u003e from C- in the charge exchange process of the tandem accelerator. In addition, a slit feedback system with a position sensitive Faraday cup to monitor the energy of accelerated ^\u003c13\u003eC^\u003c3+\u003e ions stabilizes terminal voltage, which provides us highly stable isotope-ratio measurement. (4) a gas ionization detector measures E and E_\u003cresidual\u003e of incoming ions, to separate ^\u003c14\u003eC^\u003c3+\u003e ions from various background ions. Provided that the background ions are rejected efficiently, ^\u003c14\u003eC ages older than 60,000 will be measurable with this system. (5) A computer program is equipped with the system which controls the carbon-isotope-ratio measurement for multi-samples automatically. This provides us a high-efficient measurement without any hard works of operation staff. These improvements are discussed here in detail. 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名古屋大学に設置されているGIC社およびHVEE社製の2台のタンデトロン加速器質量分析計の現状
https://doi.org/10.18999/10.19999/sumrua.9.27
bd16e515-51d3-44f1-b7d9-7661b6ca66c9
名前 / ファイル | ライセンス | アクション | |
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2010-05-19 | |||||
タイトル | ||||||
タイトル | 名古屋大学に設置されているGIC社およびHVEE社製の2台のタンデトロン加速器質量分析計の現状 | |||||
その他のタイトル | ||||||
その他のタイトル | Present Status of the GIC-and HVEE-Tandetron AMS Systems of the DMRC, Nagoya University | |||||
著者 |
中村, 俊夫
× 中村, 俊夫× Nakamura, Toshio× パルス, ルディ× Pals, Ludi |
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権利 | ||||||
権利情報 | 名古屋大学年代測定資料研究センター 天然放射性元素測定小委員会 | |||||
権利 | ||||||
権利情報 | 本文データは学協会の許諾に基づきCiNiiから複製したものである | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 加速器質量分析 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | タンデトロン | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 高輝度セシウムスパッタ負イオン源 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 同位体同時入射システム | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | リコンビネーター | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | ビームプロフィルモニタ | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 電離箱検出器 | |||||
抄録 | ||||||
内容記述 | In the financial years of 1995-1996,we introduced a second-generation Tandetron (a carbon dating system, Model 4130-AMS) which was manufactured by High Voltage Engineering Europe (HVEE) BV, the Netherlands. Main improvements of the 2nd-generation Tandetron compared with the old GIC(General Ionex Corporation)-Tandetron are : (1) a high intensity cesium sputter ion source is equipped with the new system, so that the ^<14>C counting rate is almost one order higher than that for the old system. In addition, since up to 59 targets can be loaded at a time, measurements can be conducted more efficiently. (2) carbon isotopes ^<12>C-, ^<13>C- and ^<14>C- are injected into a tandem accelerator simultaneously, by using a recombinator system, which will archive high accuracy measurements of the carbon isotope ratio. (3) the terminal voltage of the accelerator is 2.5MV, which gives the maximum yield in producing C^<3+> from C- in the charge exchange process of the tandem accelerator. In addition, a slit feedback system with a position sensitive Faraday cup to monitor the energy of accelerated ^<13>C^<3+> ions stabilizes terminal voltage, which provides us highly stable isotope-ratio measurement. (4) a gas ionization detector measures E and E_<residual> of incoming ions, to separate ^<14>C^<3+> ions from various background ions. Provided that the background ions are rejected efficiently, ^<14>C ages older than 60,000 will be measurable with this system. (5) A computer program is equipped with the system which controls the carbon-isotope-ratio measurement for multi-samples automatically. This provides us a high-efficient measurement without any hard works of operation staff. These improvements are discussed here in detail. As the results of those improvements stated above, the highest performances in the ^<14>C measurements with the new Tandetron is : (1) a measurement error of ^<14>C age can be as small as ±20 years with a measurement time of a few tens of minutes for a carbon sample of less than 1 mg ; (2) a full automatic measurement can be routinely performed ; (3) more than 3,000 samples can be measured annually. | |||||
内容記述タイプ | Abstract | |||||
内容記述 | ||||||
内容記述 | 第10回名古屋大学タンデトロン加速器質量分析計シンポジウム(平成9 (1997)年度)報告 「最新型タンデトロン加速器質量分析計(加速器年代測定システム)による高精度・高分解能14C年代測定の利用分野・方法の開拓(II)」 | |||||
内容記述タイプ | Other | |||||
出版者 | ||||||
出版者 | 名古屋大学年代測定資料研究センター 天然放射性元素測定小委員会 | |||||
言語 | ||||||
言語 | jpn | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | departmental bulletin paper | |||||
ID登録 | ||||||
ID登録 | 10.18999/10.19999/sumrua.9.27 | |||||
ID登録タイプ | JaLC | |||||
関連情報 | ||||||
関連タイプ | isVersionOf | |||||
関連識別子 | ||||||
識別子タイプ | URI | |||||
関連識別子 | http://ci.nii.ac.jp/naid/110001136041/ | |||||
書誌情報 |
名古屋大学加速器質量分析計業績報告書 巻 9, p. 27-45, 発行日 1998-03 |
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フォーマット | ||||||
application/pdf | ||||||
著者版フラグ | ||||||
値 | publisher |