公开(公告)号：US06633041B2

公开(公告)日：2003-10-14

申请号：US10245656

申请日：2002-09-16

Applicant: Thomas E. Felter

Inventor： Thomas E. Felter

IPC: H01J4914

CPC classification number: H01J49/147 ,  H01J1/3042 ,  H01J49/08 ,  H01J49/4215 ,  H01J2201/30407

Abstract: An improved quadrupole mass spectrometer is described. The improvement lies in the substitution of the conventional hot filament electron source with a cold cathode field emitter array which in turn allows operating a small QMS at much high internal pressures then are currently achievable. By eliminating of the hot filament such problems as thermally “cracking” delicate analyte molecules, outgassing a “hot” filament, high power requirements, filament contamination by outgas species, and spurious em fields are avoid all together. In addition, the ability of produce FEAs using well-known and well developed photolithographic techniques, permits building a QMS having multiple redundancies of the ionization source at very low additional cost.

Abstract translation: 描述了改进的四极质谱仪。 改进之处在于用冷阴极场发射体阵列代替传统的热丝电子源，该冷阴极场发射器阵列又允许在很高的内部压力下操作小的QMS，然后目前是可实现的。 通过消除热丝，诸如热“裂解”精细的分析物分子，排除“热”丝，高功率需求，排气物质的细丝污染和杂散电场等问题都避免在一起。 此外，使用已知和发展良好的光刻技术生产FEA的能力允许以非常低的附加成本构建具有多个电离源冗余的QMS。

公开(公告)号：US06452167B1

公开(公告)日：2002-09-17

申请号：US09315001

申请日：1999-05-19

Applicant: Thomas E. Felter

Inventor： Thomas E. Felter

IPC: H01J4914

CPC classification number: H01J49/147 ,  H01J1/3042 ,  H01J49/08 ,  H01J49/4215 ,  H01J2201/30407

Abstract: An improved quadrupole mass spectrometer is described. The improvement lies in the substitution of the conventional hot filament electron source with a cold cathode field emitter array which in turn allows operating a small QMS at much high internal pressures then are currently achievable. By eliminating of the hot filament such problems as thermally “cracking” delicate analyte molecules, outgassing a “hot” filament, high power requirements, filament contamination by outgas species, and spurious em fields are avoid all together. In addition, the ability of produce FEAs using well-known and well developed photolithographic techniques, permits building a QMS having multiple redundancies of the ionization source at very low additional cost.

Abstract translation: 描述了改进的四极质谱仪。 改进之处在于用冷阴极场发射体阵列代替传统的热丝电子源，该冷阴极场发射器阵列又允许在很高的内部压力下操作小的QMS，然后目前是可实现的。 通过消除热丝，诸如热“裂解”精细的分析物分子，排除“热”丝，高功率需求，排气物质的细丝污染和杂散电场等问题都避免在一起。 此外，使用已知和发展良好的光刻技术制造FEA的能力允许以非常低的附加成本构建具有多个电离源冗余的QMS。

公开(公告)号：US06521898B2

公开(公告)日：2003-02-18

申请号：US09903475

申请日：2001-07-10

Applicant: Ara Chutjian ,  Murray R. Darrach ,  Otto J. Orient

Inventor： Ara Chutjian ,  Murray R. Darrach ,  Otto J. Orient

IPC: H01J4914

CPC classification number: H01J49/14

Abstract: The present invention provides an improved electron ionizer for use in a quadrupole mass spectrometer. The improved electron ionizer includes a repeller plate that ejects sample atoms or molecules, an ionizer chamber, a cathode that emits an electron beam into the ionizer chamber, an exit opening for excess electrons to escape, at least one shim plate to collimate said electron beam, extraction apertures, and a plurality of lens elements for focusing the extracted ions onto entrance apertures.

Abstract translation: 本发明提供一种用于四极质谱仪的改进的电离子发生器。 改进的电子离子发生器包括排出样品原子或分子的排斥板，离子化器室，向电离器室中发射电子束的阴极，用于过量电子逸出的出口，至少一个垫板以准直所述电子束 ，提取孔，以及用于将提取的离子聚焦到入口孔上的多个透镜元件。

公开(公告)号：US06492640B2

公开(公告)日：2002-12-10

申请号：US09759519

申请日：2001-01-16

Applicant: Ikutaka Terakura

Inventor： Ikutaka Terakura

IPC: H01J4914

CPC classification number: H01J49/14

Abstract: In an ionization device of a mass spectrometer, an abnormality diagnosis device or control section switches a change-over switch without lighting up a filament, and reads a trap current and a total current supplied to the filament, by current/voltage converting sections. Then, by determining whether the trap current and the total current are zero or more, a trouble due to a contact between the filament or a trap electrode and an ionization chamber is found. When it is determined that a condition is normal, the filament is turned on and the feedback control is operated. Also, the trap current and the total current are respectively read, and in accordance with the values thereof, there is found a deficiency due to a shift of the attachment position of the filament or the trap electrode, or a burnout of the filament.

Abstract translation: 在质谱仪的离子化装置中，异常诊断装置或控制部切换开关而不点亮灯丝，并通过电流/电压转换部读取供给灯丝的陷波电流和总电流。 然后，通过确定陷阱电流和总电流是否为零以上，发现由于灯丝或陷阱电极和电离室之间的接触引起的故障。 当确定条件正常时，灯丝被打开并且反馈控制被操作。 另外，陷阱电流和总电流分别被读取，并且根据其值，发现由于灯丝或陷阱电极的安装位置的偏移或灯丝的烧坏引起的缺陷。

公开(公告)号：US06271527B1

公开(公告)日：2001-08-07

申请号：US09588991

申请日：2000-06-06

Applicant: Ara Chutjian ,  Murray R. Darrach ,  Otto J. Orient

Inventor： Ara Chutjian ,  Murray R. Darrach ,  Otto J. Orient

IPC: H01J4914

CPC classification number: H01J49/14

Abstract: The present invention provides an improved electron ionizer for use in a quadrupole mass spectrometer. The improved electron ionizer includes a repeller plate that ejects sample atoms or molecules, an ionizer chamber, a cathode that emits an electron beam into the ionizer chamber, an exit opening for excess electrons to escape, at least one shim plate to collimate said electron beam, extraction apertures, and a plurality of lens elements for focusing the extracted ions onto entrance apertures.

Abstract translation: 本发明提供一种用于四极质谱仪的改进的电离子发生器。 改进的电子离子发生器包括排出样品原子或分子的排斥板，离子化器室，向电离器室中发射电子束的阴极，用于过量电子逸出的出口，至少一个垫板以准直所述电子束 ，提取孔，以及用于将提取的离子聚焦到入口孔上的多个透镜元件。