LHAASO在宇宙线物理中的里程碑意义
文献类型：期刊论文
| 作者 | Cao, Zhen,, |
| 刊名 | Kexue Tongbao/Chinese Science Bulletin
 |
| 出版日期 | 2022 |
| 卷号 | 67期号:14页码:1558-1566 |
| ISSN号 | 0023074X |
| DOI | 10.1360/TB-2022-0160 |
| 文献子类 | Article |
| 英文摘要 | The Large High Altitude Air Shower Observatory (LHAASO) is one of the largest experiments in the history of cosmic ray physics research for 110 years. The key scientific goal is to search for cosmic ray origins. Not only for exploring for ultra-high-energy (UHE) gamma ray sources, LHAASO is also used for the precision measurements of the charged cosmic rays for their composition and energy spectral distributions near-by the Earth, thus allowing a systematic study of the cosmic rays for their acceleration in source regions and propagation through the interstellar space. In this paper, we reviewed the history of proposing, construction and operation of LHAASO. We also briefly explain the discoveries made in the first phase of operation of LHAASO mainly during the deployment of the next half of the array. They demonstrate the capability of finding new gamma ray sources particularly for extended radiation regions in gamma ray energy greater than 100 TeV. Since the energy range is so high that have never been systematically explored by previous experiments, the territory allows us to do many new studies and to have new views on the existing gamma ray sources particularly in the way to identify them as cosmic ray sources. The first discoveries by LHAASO actually start the era of UHE gamma ray astronomy, by unveiling the various types of PeVatron candidates in our galaxy. This paved the way of finding the origins of cosmic rays, offered guidance of precision study of the cosmic ray particle acceleration mechanisms and propagation effects in the future. This is unique in the history of cosmic ray research that a single experiment could make breakthroughs in both gamma ray astronomy and precision measurement of charged cosmic ray particles. Separating single species of cosmic rays out of the total cosmic ray flux at such high energy, was treated as an impossible mission in the community. Meanwhile, the LHAASO experiment provides a platform with extreme conditions for precision testing for existing theories and models, or even poses challenges to them. The current measurements of the newly discovered PeVatrons also set performance specifications for post-LHAASO experiments in cosmic rays, gamma rays and astronomic neutrino detections. We express our views about the historic impact of the LHAASO experiment in this paper. We also outlook the future experiments along the direction pointed by LHAASO. In short term, it is urgent to boost the sensitivity of pointing observation of UHE gamma ray sources, to resolve the detailed structures of possible cosmic ray sources among the PeVatrons discovered by LHAASO. This is the way to unveil the particle acceleration mechanisms in the PeVatrons. In the medium term, the discovery power for PeVatrons in our galaxy particularly in the southern hemisphere ought to be enhanced. The goal is to find sufficient sources to count for all observed cosmic ray flux. In the long run, we need to raise the astronomic neutrino detection sensitivity to a level that matches the gamma ray detection, namely to have the capability of detecting the neutrino flux from a single source like the Crab Nebula or Cygnus region as predicted according to their gamma ray flux measured by LHAASO. This is the way to approach the ultimate goal of certifying the cosmic ray origins. © 2022, Science Press. All right reserved. |
| 电子版国际标准刊号 | 20959419 |
| 语种 | 中文 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/299824]  |
| 专题 | 高能物理研究所_粒子天体物理中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Cao, Zhen,,. LHAASO在宇宙线物理中的里程碑意义[J]. Kexue Tongbao/Chinese Science Bulletin,2022,67(14):1558-1566. |
| APA | Cao, Zhen,,.(2022).LHAASO在宇宙线物理中的里程碑意义.Kexue Tongbao/Chinese Science Bulletin,67(14),1558-1566. |
| MLA | Cao, Zhen,,."LHAASO在宇宙线物理中的里程碑意义".Kexue Tongbao/Chinese Science Bulletin 67.14(2022):1558-1566. |
入库方式： OAI收割
来源：高能物理研究所
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