The Basic Study for Atomic Hydrogen Gas

本项目旨在产生自旋极化的原子陀螺气体，并研究该气体的物理特性。要进行这项研究工作，必须建立(1)超导磁体的强磁场，(2)稀释低温恒温器的低温，(3)氢气与原子的解离，(4)室内气体的冷凝，(5)气体密度、极化等的检测，(6)用微波喷射储存的气体。现在，我们已经用超导磁体完成了强磁场。磁场被激发到6.4特斯拉，并以恒流模式驱动。液化液。4He消耗率分别为0.59、1h和0.89。/h分别在恒流模式和正常电流模式下。稀释式低温恒温器已在我所的车间建成。在氦-3模式下进行的测试显示了较好的性能，但稀释模式的运行表明需要进行一些改进。改进工作已接近尾声。在室温下观察到了射频振荡器对氢气的解离作用。制作了氢气原子室，并在其中安装了测辐射热计。为了完成这个项目，我们还需要进行以下几个方面的研究：(1)用稀释式低温恒温器冷却气体；(2)原子氢气体检测方法的建立；(3)气体密度和极化的测量。(4)极化原子氢气的喷射测试。

This project aims at the production of the spin polarized atomic gydrogen gas and study the physical characteristics of the gas. To perform this research work, one must construct (I) the high magnetic field by a superconductive magnet, (2) low temperature by a dilution cryostat, (3) dissociation of hydrogen gas to atoms, (4) condensation of gas in a chamber (5) detection of the gas density, polarization etc. and (6) the ejection of stored gas by microwave.Now, we have completed the high magnetic field by superconductive magnet. The magnetic field was excited up to 6.4 Tesla, and driven by constant current mode. The liq. ^4He consumption rate was 0.59, lh and 0.89. /h at constant and normal current modes, respectively. The dilution cryostat has been built at the workshop of our institute. The test by helium-3 mode showed fairly good performance, but it has been made clear that some improvements were necessary by the dilution mode operation. The improvement has been almost finished. The dissociation of hydrogen gas by RF oscillator was observed at room temperature. The chamber for the atomic hydrogen gas is made and the bolometer is installed in it. We are now testing the detection of the atomic hydrogen gas in a small superconducting magnet set in a glass dewar.In order to complete this project, the following studies should be performed further.(1) The cooling of the gas at several lomx by the dilution mode cryostat.(2) The establishment of the gas detection method for the atomic hydrogen.(3) The measurements of the gas density and polarization.(4) The test of the ejection of the polarized atomic hydrogen gas.