恆定電流運轉之同步輻射紅外顯微光譜及其應用

A Study of Fourier-Transform Infrared Microspectroscopy under Top-Up Injection Operation at NSRRC

李耀昌(Yao-Chang Lee) ； 陳慶曰(Ching-Iue Chen) ； 黃佩瑜(Pei-Yu Huang) ； 劉金炎(Chin-Yen Liu)

《科儀新知》 170期 (2009/06) Pp. 7-15

https://doi.org/10.29662/IT.200906.0001

摘要

從2005年底國家同步輻射研究中心正式啟用恆定電流注射模式運轉。在恆定電流模式下，儲存環內維持電子束流300mA運轉，此模式使光束線光學元件維持具恆定熱載的優勢，且具有更高的紅外光通量和輝度提供給用戶進行實驗。但在恆定電流注射模式運轉下，紅外光譜擷取過程中常受到電子束注入儲存環瞬間的高頻雜訊干擾，因此我們設計了一個邏輯電路閘之控制模組，以避免高頻雜訊的干擾。在本文中將詳細說明此邏輯閘模組機制與紅外顯微光譜實驗站之現況，經由此邏輯閘模組控制和同步輻射傅立葉轉換紅外顯微技術，不但可提供量測樣品於中紅外光區的分子振動吸收光譜，更可利用樣品中不同成分物種之特徵吸收，以建立紅外光譜影像。

並列摘要

Top-up mode is the standard mode of operation at the National Synchrotron Radiation Research Center (NSRRC, Taiwan) for serving users since the end of the year of 2005. Based on running constant beam current, beamlines take the advantage of constant heat load, higher flux of photon, and brightness for data acquisition. However, a random high frequency noise was always induced in the infrared spectrum during top-up mode operation. In order for eliminating the spectral noise during electron injection, an innovative gating system was constructed and proved to be effective method by steering acquisition program of infrared microspectroscopy system. In this study, we reported the detailed gating scheme, a gating module and the status of end-station of infrared microspectroscopy. Utilizing both noise eliminating system and technique of synchrotron-radiation-based FT-IR, we successfully acquired subsequently spectra and spectral images.