RICE - Radio Ice Cerenkov Experiment

RICE - 无线电冰切伦科夫实验

• 批准号: 9617412
• 负责人: Dave Besson
• 金额: $ 2万
• 依托单位: University of Kansas Main Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-08-01 至 1999-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9617412&HistoricalAwards=false
• 关键词: RICE; Radio; Ice; Cerenkov; Experiment

Abstract 9617412 Besson Electromagnetic radiation (light, x-rays, gamma rays, etc.) cannot escape from inside the most active regions of the universe, for instance from the nuclei of galaxies, nor can the highest energy gamma rays even propagate through intergalactic space because they will be absorbed by the cosmic background infrared photons. Neutrinos, however, can traverse a considerable amount of material unimpeded, and if they can be detected in such a way that their arrival direction and energy can be determined, they can be used to study high density regions and highest energy events of the cosmos. When an electron type neutrino does interact in a dielectric medium (such as the deep glacial ice beneath South Pole) it will produce a shower of electron and positrons which will rapidly radiate away the energy of the original neutrino as electromagnetic radiation. The probability of such interactions increases with increasing energy, so that a detector's sensitivity increases with energy. Thus, a modest (by neutrino detector standards) sized instrumented volume of ice, say a 100 meter cube, could have an effective volume of a cubic kilometer, a size which is deemed necessary to do astronomy. This is a pilot project to determine the feasibility of the radio detection of neutrino interactions in ice. ***

摘要9617412贝松电磁辐射（光，X射线，伽马射线等）不能从宇宙中最活跃的区域，例如从星系核中逃逸，也不能通过星系际空间传播最高能量的伽马射线，因为它们会被宇宙背景红外光子吸收。 然而，中微子可以不受阻碍地穿过相当数量的物质，如果能够以确定其到达方向和能量的方式检测到它们，它们可以用于研究宇宙的高密度区域和最高能量事件。 当电子型中微子在电介质（例如南极下面的深层冰川）中相互作用时，它会产生电子和正电子的簇射，这些电子和正电子会迅速辐射出原始中微子的能量作为电磁辐射。 这种相互作用的概率随着能量的增加而增加，因此探测器的灵敏度随着能量的增加而增加。 因此，一个中等大小（以中微子探测器的标准）的冰的仪器体积，比如一个100米的立方体，可以有一个立方公里的有效体积，这个尺寸被认为是天文学所必需的。 这是一个试点项目，以确定无线电探测冰中中微子相互作用的可行性。 ***