公开(公告)号：US5744796A

公开(公告)日：1998-04-28

申请号：US744366

申请日：1996-11-07

申请人： Keizo Kinoshita ,  Seiji Samukawa ,  Tetsu Mieno

发明人： Keizo Kinoshita ,  Seiji Samukawa ,  Tetsu Mieno

IPC分类号： G01N27/62 ,  H01J37/05 ,  H01J49/10 ,  H01J49/14 ,  H01J49/26

CPC分类号： H01J37/32935 ,  H01J49/14

摘要： In a mass spectrometer, a DC power supply amplifier is additionally provided in a circuit for generating an accelerating voltage of an electron beam for ionizing radicals. A "potential for ionization of radicals" is applied as a reference voltage of the accelerating voltage of the radical ionizing electron beam, and an output signal of the mass spectrometer is measured as a background signal strength. Then, the DC power supply amplifier is controlled to alternately supply the "potential for ionization of radicals" and a "potential slightly lower than a potential for dissociative ionization of parent gas or dissociative ionization of parent radicals", as the accelerating voltage of the radical ionizing electron beam. A difference between the background signal strength and the output signal of the mass spectrometer when the "potential slightly lower than a potential for dissociative ionization of parent gas or dissociative ionization of parent radicals" is applied as the accelerating voltage of the radical ionizing electron beam, reflects the density of radicals.

摘要翻译： 在质谱仪中，在用于产生用于电离自由基的电子束的加速电压的电路中另外提供直流电源放大器。 作为自由基电离电子束的加速电压的基准电压，施加“自由基离子化的电位”，并且测量质谱仪的输出信号作为背景信号强度。 然后，控制直流电源放大器交替地提供“自由基电离的潜力”和“母体气体离解电离的潜力或亲本自由基的离解电离的潜力”，作为激进的加速电压 电离电子束。 作为自由基电离电子束的加速电压，使用“电位略低于母体的离子化离子化电位或母体自由基的离解电离的电位”时的质谱仪的背景信号强度和输出信号之间的差异， 反映了自由基的密度。