81003310

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キン イオン ビーム ト ガス ターゲット ノ ショウトツジ ノ ハンノウ ダンメンセキ ソクテイ システム ノ サクセイ

Fabrication of the measurement system for the cross sections in collisions between Au beams and gas targets

Review of the Faculty of Maritime Sciences, Kobe University

08<商船・理工論篇>

47-58

神戸大学大学院海事科学研究科

2011-07

2011-08-10

We fabricated an experimental system for a study on the collision physics of negative Au ions with atoms or molecules using the tandem accelerator. First of all, the gas pressure in the gas cell was measured by Baratron. Taking account of the pressure gradient in the gas cell, the gas thickness was calibrated by HE IGC for some kinds of gases. A system that can measure the beam current of the ions deflected in a small angle was installed at the 0-degree beam line of the tandem accelerator system. Negative ions through the tandem accelerator were detected with the system, and the current was measured as a function of the gas pressure in the gas cell at some terminal voltages. The total electron-loss cross sections of the negative Au ion ware obtained. The cross sections were consistent with those of other researcher's results, but the cross sections for high energy ions were smaller than the other’s results. The gas pressure dependence of the low-energy Au+ ion beam current measured with the “0-deg. detector” was similar to that measured with the 15-deg. line Faraday cup. The atomic and the molecular collision experiment of MeV ions can be conducted with this system.

紀要論文