发明授权
US07935923B2 Performance enhancement through use of higher stability regions and signal processing in non-ideal quadrupole mass filters
有权
通过在非理想的四极杆质量过滤器中使用更高的稳定性区域和信号处理来提高性能
- 专利标题: Performance enhancement through use of higher stability regions and signal processing in non-ideal quadrupole mass filters
- 专利标题(中): 通过在非理想的四极杆质量过滤器中使用更高的稳定性区域和信号处理来提高性能
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申请号: US12168407申请日: 2008-07-07
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公开(公告)号: US07935923B2公开(公告)日: 2011-05-03
- 发明人: Kerry Cheung , Luis F. Velásquez-García , Akintunde I. Akinwande
- 申请人: Kerry Cheung , Luis F. Velásquez-García , Akintunde I. Akinwande
- 申请人地址: US MA Cambridge
- 专利权人: Massachusetts Institute of Technology
- 当前专利权人: Massachusetts Institute of Technology
- 当前专利权人地址: US MA Cambridge
- 代理机构: Gauthier & Connors LLP
- 主分类号: H01J37/12
- IPC分类号: H01J37/12
摘要:
A quadrupole mass filter (QMF) is provided. The QMF includes a plurality of rectangular shaped electrodes aligned in a symmetric manner to generate a quadrupole field. An aperture region is positioned in a center region parallel to and adjacent to each of the rectangular shaped electrodes. An incoming ion stream enters the aperture region so as to be controlled by the quadrupole field. A plurality of voltage sources provide a r.f. and d.c. signal to the electrodes for generating the quadrupole field. An auxiliary voltage source applies an auxiliary drive signal to the r.f. and d.c. signal to create new stability boundaries within the standard Mathieu stability regions with high-resolution around operating conditions where there are approximately no higher-order resonances.