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首页> 外文期刊>Physical Review. Accelerators and Beams >Heavy-ion-induced desorption yields of cryogenic surfaces bombarded with span class="aps-inline-formula"math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"mn1.4/mnmtext?/mtextmtext?/mtextmiMeV/mimo//momi mathvariant="normal"u/mi/math/span xenon ions
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Heavy-ion-induced desorption yields of cryogenic surfaces bombarded with span class="aps-inline-formula"math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"mn1.4/mnmtext?/mtextmtext?/mtextmiMeV/mimo//momi mathvariant="normal"u/mi/math/span xenon ions

机译：用 class =“ aps-inline-formula”> 1.4 ？ ？ MeV / u 氙离子

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摘要

Heavy-ion-induced desorption of two different cryogenic targets was studied with a new experimental setup installed at the GSI High Charge State Injector. One gold-coated and one amorphous-carbon-coated copper target, bombarded under perpendicular impact with $1.4ext{ }ext{ }mathrm{MeV}/mathrm{u}$ ${mathrm{Xe}}^{18+}$ ions, were tested. Partial pressure rises of ${mathrm{H}}_{2}$, CO, ${mathrm{CO}}_{2}$, and ${mathrm{CH}}_{4}$ and effective desorption yields were measured at 300, 77, and 8 K using continuous heavy-ion bombardment. We found that the desorption yields decrease with decreasing target temperature and measured the yield rises as a function of CO gas cryosorbed at 8 K. In this paper we describe the experimental system comprising a new cryogenic target assembly, the preparation of the targets, the test procedure, and the evaluation of the effective pumping speed of the setup. Pressure rise and gas adsorption experiments are described; the obtained results are discussed and compared with literature data.
机译：使用安装在GSI高电荷状态进样器上的新实验装置研究了重离子诱导的两个不同低温目标的解吸。一个镀金的靶和一个镀无定形碳的铜靶，在垂直撞击下用$ 1.4 text {} text {} mathrm {MeV} / mathrm {u} $ $ { mathrm {Xe}} ^ {测试了18 +} $个离子。 $ { mathrm {H}} _ {2} $，CO，$ { mathrm {CO}} _ {2} $和$ { mathrm {CH}} _ {4} $的分压上升且有效使用连续重离子轰击在300 K，77 K和8 K下测量解吸产率。我们发现，解吸产率随目标温度的降低而降低，并测量了产率的升高与在8 K下低温吸附的CO气体的关系。在本文中，我们描述了一个包括新低温靶组件的实验系统，靶的制备，测试程序，并评估设置的有效抽速。描述了压力上升和气体吸附实验;对获得的结果进行了讨论，并与文献数据进行了比较。

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