{"title":"ALPACA实验:首次在南方天空观测亚pev伽玛射线的项目","authors":"Teruyoshi Kawashima","doi":"10.21468/scipostphysproc.13.008","DOIUrl":null,"url":null,"abstract":"The ALPACA experiment is a project aiming to observe sub-PeV gamma rays for the first time in the southern hemisphere. The main goal of ALPACA is to identify PeVatrons, the accelerators of Galactic PeV cosmic rays, by observing sub-PeV pion-decay gamma rays generated in interactions between PeV cosmic rays and the interstellar medium. This new air shower experiment is located at an altitude of 4,740 m above sea level in the middle of Mt. Chacaltaya in Bolivia. The air shower array consists of 401 scintillation counters covering an 83,000 m ^2 <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><mml:msup><mml:mi /><mml:mn>2</mml:mn></mml:msup></mml:math> surface area. In addition, a water-Cherenkov-type muon detector array with an area of 3,700 m ^2 <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><mml:msup><mml:mi /><mml:mn>2</mml:mn></mml:msup></mml:math> is installed to discriminate gamma rays from background cosmic rays. The prototype array ALPAQUITA will start data taking in 2022 and will extend to ALPACA in 2024. We report on a general introduction to ALPACA, the progress of the project, and the sensitivity to sub-PeV gamma rays.","PeriodicalId":355998,"journal":{"name":"SciPost Physics Proceedings","volume":"46 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2023-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"The ALPACA experiment: The project of the first sub-PeV gamma-ray observation in the southern sky\",\"authors\":\"Teruyoshi Kawashima\",\"doi\":\"10.21468/scipostphysproc.13.008\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The ALPACA experiment is a project aiming to observe sub-PeV gamma rays for the first time in the southern hemisphere. The main goal of ALPACA is to identify PeVatrons, the accelerators of Galactic PeV cosmic rays, by observing sub-PeV pion-decay gamma rays generated in interactions between PeV cosmic rays and the interstellar medium. This new air shower experiment is located at an altitude of 4,740 m above sea level in the middle of Mt. Chacaltaya in Bolivia. The air shower array consists of 401 scintillation counters covering an 83,000 m ^2 <mml:math xmlns:mml=\\\"http://www.w3.org/1998/Math/MathML\\\" display=\\\"inline\\\"><mml:msup><mml:mi /><mml:mn>2</mml:mn></mml:msup></mml:math> surface area. In addition, a water-Cherenkov-type muon detector array with an area of 3,700 m ^2 <mml:math xmlns:mml=\\\"http://www.w3.org/1998/Math/MathML\\\" display=\\\"inline\\\"><mml:msup><mml:mi /><mml:mn>2</mml:mn></mml:msup></mml:math> is installed to discriminate gamma rays from background cosmic rays. The prototype array ALPAQUITA will start data taking in 2022 and will extend to ALPACA in 2024. We report on a general introduction to ALPACA, the progress of the project, and the sensitivity to sub-PeV gamma rays.\",\"PeriodicalId\":355998,\"journal\":{\"name\":\"SciPost Physics Proceedings\",\"volume\":\"46 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2023-09-28\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"SciPost Physics Proceedings\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.21468/scipostphysproc.13.008\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"SciPost Physics Proceedings","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.21468/scipostphysproc.13.008","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
摘要
ALPACA实验是一个旨在首次在南半球观测亚pev伽马射线的项目。ALPACA的主要目标是通过观测PeV宇宙射线与星际介质相互作用产生的亚PeV介子衰变伽马射线，来识别pevatron，即星系PeV宇宙射线的加速器。这个新的风淋室实验位于玻利维亚Chacaltaya山中部海拔4740米的地方。空气淋室阵列由401个闪烁计数器组成，覆盖83,000 m ^ 22的表面积。此外，还安装了一个面积为3700 m ^ 22的水-切伦科夫型μ子探测器阵列，用于区分伽马射线和背景宇宙射线。原型阵列ALPAQUITA将于2022年开始数据采集，并将于2024年扩展到ALPACA。我们报告了ALPACA的一般介绍，项目的进展，以及对亚pev伽马射线的灵敏度。
The ALPACA experiment: The project of the first sub-PeV gamma-ray observation in the southern sky
The ALPACA experiment is a project aiming to observe sub-PeV gamma rays for the first time in the southern hemisphere. The main goal of ALPACA is to identify PeVatrons, the accelerators of Galactic PeV cosmic rays, by observing sub-PeV pion-decay gamma rays generated in interactions between PeV cosmic rays and the interstellar medium. This new air shower experiment is located at an altitude of 4,740 m above sea level in the middle of Mt. Chacaltaya in Bolivia. The air shower array consists of 401 scintillation counters covering an 83,000 m ^2 2 surface area. In addition, a water-Cherenkov-type muon detector array with an area of 3,700 m ^2 2 is installed to discriminate gamma rays from background cosmic rays. The prototype array ALPAQUITA will start data taking in 2022 and will extend to ALPACA in 2024. We report on a general introduction to ALPACA, the progress of the project, and the sensitivity to sub-PeV gamma rays.
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