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Experimental Search for Solar Axions and Chameleons

太阳轴子和变色龙的实验搜索

基本信息

批准号：
74565491
负责人：
Professor Dr. Dieter H.H. Hoffmann
金额：
--
依托单位：
Institut für Kernphysik
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2008
资助国家：
德国
起止时间：
2007-12-31 至 2019-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/74565491?language=en
关键词：
Experimental Search Solar Axions Chameleons

项目摘要

The aim of this proposal is to ensure our participation in the CAST (CERN Axion Solar Telescope) experiment. CAST has been operating since 2003 and has successfully improved the limits for the axion-photon coupling constant (for axion masses < 0,02 eV) by a factor of 6 compared to prior axion helioscopes. Improvements of the detectors used at CAST have been implemented last year, and together with a second x-ray telescope, these improvements have increased our sensitivity for Axion-like particles (ALPs) by a factor of 4-5 as compared to our previous measurements.Recently, the search for elementary particles at CAST has been extended beyond ALPs. In addition, we have started to look for Chameleons, candidate particles for dark energy. The theoretical model for Chameleons predicts electromagnetic coupling via the Primakoff effect, as well as a direct coupling to matter. The search for chameleons is also included in the experimental program of CAST for 2015.This proposal has two research goals. First, we want to participate in the search for solar axions in 2015 by operating the x-ray telescope and taking part in the general operation of CAST. Secondly, a new detector to search for Chameleons has been developed at the INFN in Trieste and will be tested at CAST in 2015. We plan to take part in the installation, commissioning, and operation of this detector.Both experimental programs (the extension of the search for solar axions as well as the search for chameleons) have been reviewed by the SPSC committee at CERN and have been approved in October 2014.

该提案的目的是确保我们参与CAST（CERN Axion Solar Telescope）实验。自2003年以来，CAST一直在运行，并成功地将轴子-光子耦合常数的限制（轴子质量<0.02 eV）与以前的轴子日光镜相比提高了6倍。去年，CAST对探测器进行了改进，加上第二台X射线望远镜，这些改进使我们对类轴子粒子（ALP）的灵敏度比以前的测量提高了4-5倍。最近，CAST对基本粒子的搜索已经扩展到ALP之外。此外，我们已经开始寻找变色龙，暗能量的候选粒子。变色龙的理论模型预测了通过普里马科夫效应的电磁耦合以及与物质的直接耦合。变色龙的研究也被列入中国科学院2015年的实验计划。首先，我们希望在2015年通过操作X射线望远镜和参加CAST的一般操作来参与太阳轴子的搜索。第二，位于的里雅斯特的国家科学和技术研究所开发了一种新的探测器，用于搜索变色龙，并将于2015年在CAST进行测试。我们计划参与该探测器的安装、调试和运行。两个实验计划（太阳轴子的扩展搜索以及变色龙的搜索）都已通过欧洲核子研究中心SPSC委员会的审查，并于2014年10月获得批准。