Implementation of a Deceleration Beamline for the Investigation of Charge 
Exchange Processes using Highly Charged Ions

Higgins, Stuart

Implementation of a Deceleration Beamline for the Investigation of Charge Exchange Processes using Highly Charged Ions

Higgins, S. (2009). Implementation of a Deceleration Beamline for the Investigation of Charge Exchange Processes using Highly Charged Ions. Master Thesis, Imperial College, London, United Kingdom.

Item is 公開

表示: 全項目非表示: 全項目

基本情報

表示: 非表示:

アイテムのパーマリンク: https://hdl.handle.net/11858/00-001M-0000-0011-76FC-A 版のパーマリンク: https://hdl.handle.net/11858/00-001M-0000-0011-76FD-8

資料種別: 学位論文

ファイル

表示: ファイル

非表示: ファイル

:

2009-019.pdf (全文テキスト（全般）), 32MB

表示保存

ファイルのパーマリンク:
https://hdl.handle.net/11858/00-001M-0000-0011-76FB-C

ファイル名:
2009-019.pdf

説明:
-

OA-Status:

閲覧制限:
公開

MIMEタイプ / チェックサム:
application/pdf / [MD5]

技術的なメタデータ:

表示

著作権日付:
-

著作権情報:
eDoc_access: PUBLIC

CCライセンス:
-

作成者

表示:

非表示:

作成者:
Higgins, Stuart¹, 著者

所属:
1Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society, ou_904547

内容説明

表示:

非表示:

キーワード: -

要旨: A new experimental beamline has been constructed at the Heidelberg Electron Beam Ion Trap (EBIT) for the investigation of charge exchange processes between slow Highly Charged Ions (HCIs) and a neutral gas target, which are measurements of astrophysical relevance. In order to study this process in detail in the laboratory, the new experiment is designed to decelerate ions extracted from the EBIT. The ion optical properties of the new beamline and the properties of decelerated ions have been simulated using the program SIMION. Simulations show that ions are decelerated without any major broadening of their kinetic energy distribution, whereas angular distribution increases with deceleration voltage. The deceleration potential as a function of focal distance is shown to follow a parabolic relationship. Performance tests of the new beamline support the results of the simulation and qualitatively demonstrate the ion optical-like properties of the deceleration system. First experiments with Ar18+ and Ar17+ incident upon a neutral argon target have been successfully completed, with the observation of the K- peak and higher order transitions in both cases. The decay of the metastable state 3S1 of Ar16+ could be identi ed as an important decay channel using coincidence spectroscopy. Calculated hardness ratios for the spectra (0:186 +/- 0:010 for Ar18+ and 0:090 +/- 0:005 for Ar17+) are lower than those found in previous experiments by di erent groups. This deviation is most likely a consequence of lower background events as a result of the coincidence spectroscopy technique employed.

資料詳細

表示:

非表示:

言語: eng - English

日付: 受理: 2009

出版の状態: 受理 / 印刷中

ページ: VIII, 90 S. : Ill. graph. Darst.

出版情報: London, United Kingdom : Imperial College

目次: -

査読: -

識別子（DOI, ISBNなど）: eDoc: 435267

学位: 修士号 (Master)

アイテム詳細

基本情報

ファイル

関連URL

作成者

内容説明

資料詳細

関連イベント

訴訟

Project information

出版物