Development of the laser calibration system of the charged particle detector for hadron photo production

强子照片制作用带电粒子探测器激光校准系统的研制

• 批准号: 24740164
• 负责人: NIIYAMA Masayuki
• 金额: $ 2.83万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2012
• 资助国家: 日本
• 起止时间: 2012-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-24740164/
• 关键词: ハドロン物理; エキゾチックハドロン; 検出器開発; ３次元荷電粒子検出器; 国際情報交換

The internal structure of baryons are one of the most important issue in the hadron physics. Ordinary baryons have been believed consists of three constituent quarks. The L(1405) is a candidate of a baryon with five constituent quarks. The internal structure of the L(1405) can be studied from the spatial distribution of the wave function. For this measurement, it is essentially important to detect decay products of L(1405), however due to the non-uniform magnetic and electric field, the momentum resolution of the detector was deteriorated. In this study, we developed a laser calibration system of the detector and low noise amplifiers to improve the momentum resolution of the detector. We confirmed that the calibration system and new readout electronics have sufficiently good performance. The data taking with this detector and calibration system are on-going. The results of the development were reported at international conferences.

重子的内部结构是强子物理中最重要的问题之一。一般的重子被认为是由三个夸克组成的。L(1405年)是一个由五个夸克组成的重子的候选者。从波函数的空间分布可以研究L的内部结构。在这种测量中，探测L(1405年)的衰变产物是非常重要的，但由于磁场和电场的不均匀，探测器的动量分辨率下降。在这项研究中，我们开发了探测器和低噪声放大器的激光定标系统来提高探测器的动量分辨率。我们证实，校准系统和新的读出电子设备具有足够好的性能。该探测器和校准系统的数据采集正在进行中。这项研究的结果在国际会议上得到了报告。

项目成果

High time resolution RPCs with different readout geometries

• DOI: 10.1088/1748-0221/7/12/p12005
• 发表时间: 2012-12
• 期刊: Journal of Instrumentation
• 影响因子: 1.3
• 作者: N. Tomida;C. Hsieh;M. Niiyama;H. Ohnishi;W. Chang;T. Hashimoto;H. Hamano;K. Mizutani

Recent results from LEPS and prospects of LEPS II at SPring-8

• DOI: 10.1016/j.nuclphysa.2013.03.013
• 发表时间: 2013-09
• 期刊: Nuclear Physics
• 作者: Masayuki Niiyama

Spin-Density Matrix Elements forγp→K∗0Σ+ at Eγ=1.85−3.0 GeV with Evidence for theκ(800) Meson Exchange

Eγ=1.85−3.0 GeV 时 γp→K*0Σ+ 的自旋密度矩阵元素以及 κ(800) 介子交换的证据

• 发表时间: 2012
• 期刊: Phys. Rev. Lett.
• 作者: S.H. Hwang;K.Hicks;J.K. Ahn;T. Nakano;D.S. Ahn;W.C. Chang;J.Y. Chen;S. Date;H. Ejiri;H. Fujimura;M. Fujiwara;S. Fukui;W. Gohn;T. Hotta;K. Imai;T. Ishikawa;K. Joo;Y. Kato;H. Kohri;Y. Kon;H.S. Lee;Y. Maeda;M. Miyabe;T. Mibe;Y. Morino
• 通讯作者: Y. Morino

Development of large readout area, high time resolution RPCs for LEPS2 at SPring-8

在 SPring-8 上为 LEPS2 开发大读出面积、高时间分辨率 RPC

• 发表时间: 2012
• 期刊: PoS
• 作者: N. Tomida;C.Y. Hsieh;M. Niiyama;H. Ohnishi;W.C. Chang;T. Hashimoto;H. Hamano;K. Mizutani
• 通讯作者: K. Mizutani

Hadron physics with GeV photons at SPring-8/LEPS II

SPring-8/LEPS II 中使用 GeV 光子的强子物理

• 发表时间: 2013
• 作者: S.H. Hwang;K.Hicks;J.K. Ahn;T. Nakano;D.S. Ahn;W.C. Chang;J.Y. Chen;S. Date;H. Ejiri;H. Fujimura;M. Fujiwara;S. Fukui;W. Gohn;T. Hotta;K. Imai;T. Ishikawa;K. Joo;Y. Kato;H. Kohri;Y. Kon;H.S. Lee;Y. Maeda;M. Miyabe;T. Mibe;Y. Morino;M. Niiyama
• 通讯作者: M. Niiyama