Upgrades of the PICO 40L experiment

皮科40 L是皮科合作的一项新举措，旨在将发现暗物质粒子的灵敏度提高另一个数量级，同时建立一种新的气泡室技术。该实验目前处于建设的早期阶段，但已经确定了一些新的想法和升级和改进的要求。为了确保皮科40 L探测器达到其设计灵敏度，并在SNOLAB的地下环境中稳定运行，我们要求加拿大集团能够购买部件，以升级他们负责的几个组件：热控制系统，数据处理和网络接口以及新的μ子否决系统。还需要新的校准源来校准新的、屏蔽更好的探测器。

PICO 40L is a new initiative by the PICO collaboration that aims at improving the sensitivity towards the discovery of dark matter particles by another order of magnitude and to establish a new bubble chamber technology at the same time. The experiment is currently in the early stages of construction but some new ideas and requirements for upgrades and improvements have already been identified. To ensure that the PICO 40L detector will reach its design sensitivity and operate stably in the underground environment at SNOLAB, we request that the Canadian groups be enabled to purchase parts for upgrades to several of the components they are responsible for: The thermal control system, the data handling and network interface as well as a new muon veto system. New calibration sources will also be required to calibrate the new, better shielded detector.