Development of the air shower core detector for the primary cosmic-ray observation at the knee.
开发用于膝部初级宇宙射线观测的空气喷淋核心探测器。
基本信息
- 批准号:15540260
- 负责人:
- 金额:$ 2.3万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (C)
- 财政年份:2003
- 资助国家:日本
- 起止时间:2003 至 2004
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The development of the burst detector was made to measure the energy flow of the air shower core originated by heavy cosmic rays such as iron component in order to resolve the primary composition of the cosmic rays at the knee region (10^<15>eV〜10^<16>eV) which is a key information on the cosmic ray origin. A proto type burst detector consisting of 40cm x 50cm x 3.5 cm lead and scintillator of 1cm thick was setup in 2003. The burst signal is read out by photomultiplier through wavelength shifting fiber. Wide dynamic range is obtained by using two photomultipliers of the different gain. From the air shower simulation study, it was shown that the primary composition can be well studied through the observation of the air shower core by this kind of the detectors placed at Tibet Yangbajing (4300 m above sea level) with 3.75m spacing in a grid. The data analysis is based on artificial neural network to separate the nuclear species (reported on 59^<th> annual conference of the Physical Socie … More ty of Japan 2004 and Autumn conference 2004).Systematic checks and improvements were made on the proto type detector in 2004 for the linearity, the dynamic range and the positional uniformity. Data acquisition system was also developed and 4 detectors were set up in the center of the Tibet air shower array. The new burst detector is under operation since Oct. 2004 with trigger condition of burst size greater than 40 particles. The trigger rate is well within the expected value and the observation is successfully continued until now. The result of an early analysis of the experimental data is in a good agreement with the simulation showing that the instrument is working efficiently for the aimed purpose (reported on 60^<th> annual conference of the Physical Society of Japan 2005).It is ensured that the burst detector developed in this research can be used in the next step to observe the primary composition at the knee energy range. It is expected that the enlarged instrument of 20 x 20 channels in a grid will provide the knee composition with high statistics through a few years observation. Less
爆炸探测器的研制是为了测量由铁等重宇宙线产生的空气簇射核心的能量流,以解决膝部宇宙线的主要成分(10^<;15>;ev~10^<;16>;ev),这是关于宇宙线起源的关键信息。2003年建立了由40厘米×50厘米×3.5厘米的铅和1厘米厚的闪烁体组成的原型式爆炸探测器。突发信号由光电倍增管通过波长移位光纤读出。采用两个不同增益的光电倍增管,获得了较宽的动态范围。大气簇射模拟研究表明,在西藏羊八井(海拔4300m),网格间距为3.75m的这种探测器,通过对空气簇射核心的观测,可以很好地研究其主要成分。数据分析是基于人工神经网络来分离核物种(在物理学会…第59届年会上报道2004年对样机的线性度、动态范围和位置均匀性进行了系统的检测和改进。开发了数据采集系统,在西藏空气簇射阵列中心设置了4个探测器。新的爆炸探测器自2004年10月开始运行,触发条件是爆炸尺寸大于40个粒子。触发率很好地在期望值之内,观测成功地延续到现在。对实验数据的早期分析结果与模拟结果吻合较好,表明该仪器达到了预期的目的(报道于2005年日本物理学会第60届年会),为下一步利用本研究开发的爆破仪观测膝关节能量范围内的初级成分奠定了基础。通过几年的观察,预计20×20通道的网格放大仪器将为膝关节成分提供高统计量的数据。较少
项目成果
期刊论文数量(27)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Primary proton spectrum around the knee deduced from emulsion-chamber data obtained at Mts.Fuji and Kanbala
从富士山和坎巴拉获得的乳化室数据推导出膝盖周围的初级质子谱
- DOI:
- 发表时间:2003
- 期刊:
- 影响因子:0
- 作者:柴田 槇雄;齋藤敏治他
- 通讯作者:齋藤敏治他
柴田槇雄, 斎藤敏治, 片寄祐作他: "Automatic analysis of the emulsion chamber using the image scanner applied to the Tibet hybrid experiment"Nuclear Instruments and Methods in Physics Research A. (In press). (2004)
Makio Shibata、Toshiharu Saito、Yusaku Katayose 等:“使用应用于西藏混合实验的图像扫描仪自动分析乳剂室”核物理研究仪器和方法 A.(出版中)。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
Automatic analysis of the emulsion chamber using the image scanner applied to the Tibet hybrid experiment
- DOI:10.1016/j.nima.2003.12.019
- 发表时间:2004-05
- 期刊:
- 影响因子:1.4
- 作者:S. Ozawa;M. Shibata;Y. Katayose;I. Ohta;N. Hotta;T. Saito;X. Wang;T. Ouchi;J. Huang;H. Tsuchiya;J. Ren;S. L. Lu;N. Zhang;J. Li;Xueyao Zhang
- 通讯作者:S. Ozawa;M. Shibata;Y. Katayose;I. Ohta;N. Hotta;T. Saito;X. Wang;T. Ouchi;J. Huang;H. Tsuchiya;J. Ren;S. L. Lu;N. Zhang;J. Li;Xueyao Zhang
柴田槇雄, 斎藤敏治, 片寄祐作他: "Primary proton spectrum in the knee region observed by the Tibet hybrid experiment"Proceedings of 28^<th> International Cosmic Ray Conference. HE1. 107-110 (2003)
Makio Shibata、Toshiharu Saito、Yusaku Katayose 等人:“西藏混合实验观察到的膝部质子谱”第 28 届国际宇宙射线会议论文集 HE1(2003 年)。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
Primary proton spectrum in the knee region observed by the Tibet hybrid experiment
西藏混合实验观测到的膝区初级质子谱
- DOI:
- 发表时间:2003
- 期刊:
- 影响因子:0
- 作者:柴田 槇雄;齋藤敏治;片寄祐作他
- 通讯作者:片寄祐作他
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