公开(公告)号：US08455819B2

公开(公告)日：2013-06-04

申请号：US13078198

申请日：2011-04-01

申请人： Martin Green ,  Jason Lee Wildgoose ,  Steven D. Pringle ,  Daniel James Kenny

发明人： Martin Green ,  Jason Lee Wildgoose ,  Steven D. Pringle ,  Daniel James Kenny

IPC分类号： H01J49/42 ,  H01J49/00

CPC分类号： H01J49/065 ,  H01J49/0031 ,  H01J49/022 ,  H01J49/062 ,  H01J49/36 ,  H01J49/4235 ,  Y10T436/24

摘要： An ion guide or mass analyser is disclosed comprising a plurality of electrodes having apertures through which ions are transmitted in use. A pseudo-potential barrier is created at the exit of the ion guide or mass analyser. The amplitude or depth of the pseudo-potential barrier is inversely proportional to the mass to charge ratio of an ion. One or more transient DC voltages are applied to the electrodes of the ion guide or mass analyser in order to urge ions along the length of the ion guides or mass analyser. The amplitude of the transient DC voltage applied to the electrode may be increased with time so that ions are caused to be emitted from the ion guide or mass analyser in reverse order of their mass to charge ratio.

摘要翻译： 公开了一种离子导向器或质量分析器，其包括具有孔的多个电极，在使用中离子传播通过该孔。 在离子导向器或质量分析器的出口处产生伪势垒。 伪势垒的幅度或深度与离子的质荷比成反比。 一个或多个瞬态直流电压被施加到离子导向器或质量分析器的电极，以沿着离子导向器或质量分析器的长度推动离子。 施加到电极的瞬态直流电压的幅度可以随时间增加，使得离子从离子导向器或质量分析器以其质荷比的相反顺序被发射。