Development of compact emulsion spectrometer using a permanent magnet

开发使用永磁体的紧凑型乳液光谱仪

• 批准号: 14540279
• 负责人: SHIBUYA Hiroshi
• 金额: $ 2.37万
• 依托单位: Toho University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14540279/
• 关键词: permanent magnet; magnetic circuit; emulsion spectrometer; neutrino flux; neutrino oscillation; neutrino; ECC; nuclear emulsion

We have developed a compact emulsion spectrometer which can be used in places where neither electronic detectors nor electromagnets are available.(1)We designed and constructed a permanent magnetic circuit for the compact emulsion spec-trometer in cooperation with company engineers. Two types of magnetic circuits were examined by calculating magnetic field to be produced. Three-layer-structure Halbach configuration was chosen because it would produce uniform magnetic field inside it.(2)We measured magnetic field inside the magnetic circuit and confirmed that it was almost the same as the designed value.(3)We made a compact emulsion spectrometer by inserting an emulsion chamber which consists of emulsion films and spacers.(4)The compact emulsion spectrometer was exposed to a 180 MeV/u Carbon beam of HIMAC, the National Institute of Radiological Sciences in order to study its performance. The momentum (p/z) of the Carbon beam was successfully measured with a resolution of 12% from the difference between track angles in the most upstream and the most downstream films.(5)It was also exposed to a 158GeV/N Indium beam of SPS, CERN in order to examine its performance on the momentum measurements of pions and Kaons produced in high energy nucleus-nucleus interactions. The analysis is now in progress.

我们研制了一种紧凑型乳胶光谱仪，可用于既无电子探测器又无电磁铁的地方。(1)We与公司工程师合作，为紧凑型乳胶光谱仪设计并建造了永磁电路。通过计算产生的磁场，对两种磁路进行了分析。选择三层结构的Halbach结构是因为它可以在内部产生均匀的磁场。(2)We测量了磁路内的磁场，并确认其与设计值几乎相同。(3)We通过插入由乳胶膜和间隔物组成的乳胶室，制成了紧凑型乳胶光谱仪。（4）用HIMAC的180 MeV/u碳束对紧凑型乳胶谱仪进行了曝光，以研究其性能。成功地测量了碳束的动量（p/z），其分辨率为12%，来自最上游和最下游膜中的轨道角之间的差异。(5)It为了考察它在高能核-核相互作用中产生的π介子和K介子动量测量中的性能，我们还将它暴露在CERN的SPS的158 GeV/N铟束流中。目前正在进行分析。

项目成果

A.Kayis-Topaksu et al.: "Cross section measuremnet for quasi-elastic production of charmed baryons in νN interactions"Phys.Lett.B. 575. 198-207 (2003)

A. Kayis-Topaksu 等人：“νN 相互作用中粲粲重子的准弹性产生的横截面测量”Phys.Lett.B. 575. 198-207 (2003)

A.Kayis-Topaksu et al.: "Cross section measurement for quasi-elastic production of charmed baryons in νN interactions"Phys.Lett.B. 575. 198-207 (2003)

A. Kayis-Topaksu 等人：“νN 相互作用中粲算重子的准弹性产生的横截面测量”Phys.Lett.B. 575. 198-207 (2003)

A.Kayis-Topaksu et al.: "Observation of one event with the characteristics of associated charm production in neutrino charged-current interactions"Phys. Lett. B. 539. 188-196 (2002)

A.Kayis-Topaksu 等人：“对中微子带电电流相互作用中具有相关魅力产生特征的一个事件的观察”Phys。

A.Kayis-Topaksu et al.: "Measurement of Λ^+_c production in neutrino charged current interactions"Phys.Lett.. B555. 156-166 (2003)

A. Kayis-Topaksu 等人：“中微子带电电流相互作用中 Λ^+_c 产生的测量”Phys.Lett.. B555 (2003)。

A.Kayis-Topaksu et al.: "Determination of the semi-leptonic branching fraction of charm hadrons produced in neutrino charged-current interactions"Phys.Lett.B. 549. 48-57 (2002)

A.Kayis-Topaksu 等人：“中微子带电电流相互作用中产生的粲强子的半轻子分支分数的测定”Phys.Lett.B.