Observation of Small Air Shower Lasted in Short Arriving Time

小风雨到达时间短的观测

• 批准号: 63460018
• 负责人: KITAMURA Takashi
• 金额: $ 3.46万
• 依托单位: Kinki University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1988
• 资助国家: 日本
• 起止时间: 1988 至 1989
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-63460018/
• 关键词: Arriving Shower Within Very Short Times; Arrived Shower Lasted in Order of Minutes; Very Big Showers Extended Over 50 km; Search for Primordial Black Holes or Quark Nuggets; Search for Spin Up of Pulser or Explosion of Supernova; Phenomena With Devia

1) The observations have been continued since August 17th in 1989.The total real time is 1935.7 hours and the observed event number is 31,750 up to the end of February, the frequency being 16.4 hour.2) It is confirmed that almost all the events follow Poisson distribution.3) In the observation, several events with deviations of over 3 sigma were found (we cannot give the definite number at present because of variations of the number according to changes of time bin).4) Moreover, one example in which above 10 events arrived within 0.8 sec was found. We are under studying how to give the definite conclusion for this example and the several events cited above to be extraordinary.5) We are now preparing to set an absolute time scale with accuracy less than 1 micro-second for one year operation. This is for studying any correlation of these events with astronomical sources.6) The absolute time scale is also for making coincidences of our experimental apparatus with other apparatus where are over 50 km distant from our apparatus. This may be valid for observations of ultrahigh energy air showers with energies above 10 EeV.

1)从1989年8月17日开始连续观测，到2月底，共观测到真实的时1935.7小时，观测到事件31,750次，频率16.4小时。发现了几个偏差超过3 σ的事件（由于时间仓的变化会导致数量的变化，目前我们无法给出确切的数字）。4）此外，发现了一个以上10个事件在0.8秒内到达的例子。我们正在研究如何对这个例子和上面引用的几个事件给出明确的结论。5）我们现在正准备设置一个绝对时标，精度小于1微秒，用于一年的运行。这是为了研究这些事件与天文源的任何相关性。6）绝对时标也是为了使我们的实验装置与距离我们装置超过50公里的其他装置重合。这可能是有效的，为10 EeV以上的能量的高能空气簇射的观测。

项目成果

M.Chikawa他3名: "An Experimental System for Observation Lasted Arriving Time of Small Air Showers" 21st International Cosmic Ray Conference(Adelaide). 4. 278-281 (1990)

M.Chikawa 等 3 人：“小型空气阵雨持续到达时间观测的实验系统”第 21 届国际宇宙射线会议（阿德莱德）（阿德莱德）。 4. 278-281 (1990)。

M.Chikawa他3名: "An Experimental System for Observation of Lasted Arriving Time of Small Air Showers" 21st International Cosmic Conference(Adelaide). 4. 278-281 (1990)

M.Chikawa 和其他 3 人：“小型空气阵雨持续到达时间的实验系统”第 21 届国际宇宙会议（阿德莱德）（阿德莱德）。 4. 278-281 (1990)。

M.Chikawa, T.Kitamura, T.Konishi & K.Tsuji: "An Experimental System for Observation of Bursts of Very High Energy Gamma Ray Lasted for the Order of 1 to 10 Seconds (Japanese)" Science and Technology:Kinki Univ.(Annual Reports by Res. Inst.for Sci. & Tech.

M.千川、T.北村、T.小西

M.Chikawa他3名: "A New Experimental System for Observation of Short Arriving Time of Extensive Air Showers Using Computer Controlled Electronic Camac" 近畿大学理工学総合研究所研究報告. 2. 123-139 (1990)

M. Chikawa 等 3 人：“使用计算机控制电子 Camac 观测大范围空气阵雨短到达时间的新实验系统”近畿大学研究所研究报告 2. 123-139 (1990)。

T.Konishi, K.Tsuji, T.Kitamura & M.Chikawa: "An Experimental System for Detection of a Burst of Cosmic Rays (Japanese)" Annual Reports by Faculty of Science & Technology, Kinki Univ. Vol.25, p49-p52, 1989.

T.小西、K.Tsuji、T.北村