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    • 3. 发明申请
    • Laser desorption mass spectrometer with uniform illumination of the sample
    • 激光解吸质谱仪具有均匀照明的样品
    • US20050236564A1
    • 2005-10-27
    • US10832822
    • 2004-04-26
    • Craig KellerCurtis LomaxEdward WallersteinTimothy MontagneMichael Youngquist
    • Craig KellerCurtis LomaxEdward WallersteinTimothy MontagneMichael Youngquist
    • H01J49/04H01J49/16
    • H01J49/164H01J49/0413H01J49/0418
    • Systems and methods for rastering a series of illumination pulses across the surface of a sample under investigation in a mass spectrometer system so as to create a two dimensional illumination pattern (raster pattern) on the sample. A probe interface that engages a probe is configured to translate the probe along a first direction, and a pulse deflection mechanism is configured to vary the pulse-probe intersect position along a second direction. A control system, implementing a rastering algorithm, provides control signals to the pulse deflection mechanism to adjust the pulse path and the probe translation mechanism to adjust the probe position so that each illumination pulse impinges on one of a plurality of addressable locations on the sample. The resulting raster pattern may cover the entire sample or one or more portions of the sample, depending on the spot size and the displacement distances for each pulse along the first and second directions. Ions desorbed from the sample by each pulse are detected, and a corresponding series of spectra are generated for each of the series of pulses. The spectrum resulting from each pulse may be combined with others to form a combined spectrum for the portion of the sample illuminated by the raster pattern.
    • 用于在质谱仪系统中对正在研究的样品的表面上的一系列照明脉冲进行扫描以在样品上产生二维照明图案(光栅图案)的系统和方法。 接合探针的探针接口被配置为沿着第一方向平移探针,并且脉冲偏转机构被配置为沿着第二方向改变脉冲 - 探针相交位置。 控制系统实现了一种复原算法,向脉冲偏转机构提供控制信号,以调整脉冲路径和探头平移机构,以调整探头位置,使得每个照明脉冲射入样本上的多个可寻址位置之一。 取决于沿着第一和第二方向的每个脉冲的光斑尺寸和位移距离,所得到的光栅图案可以覆盖样品的整个样品或一个或多个部分。 检测每个脉冲从样品中脱离的离子,并为每个脉冲序列产生相应的一系列光谱。 每个脉冲产生的光谱可以与其他脉冲组合,以形成由光栅图案照射的样本部分的组合光谱。
    • 4. 发明申请
    • Laser desorption and ionization mass spectrometer with quantitative reproducibility
    • 激光解吸和电离质谱仪具有定量重现性
    • US20050279929A1
    • 2005-12-22
    • US11155302
    • 2005-06-17
    • Michael YoungquistCraig Keller
    • Michael YoungquistCraig Keller
    • B01D59/44H01J49/16
    • H01J49/164
    • Laser desorption/ionization time-of-flight mass spectrometer (“LDI-TOF-MS”) devices, and methods, that accurately measure the mass of analytes contained in a sample and which also measure the quantities of analytes present in a sample in a consistent manner from instrument-to-instrument and over time on a single instrument. In particular, the invention provides LDI-TOF-MS devices and methods in which: 1) the energy of the laser pulse and the area of the sample illuminated (fluence) is consistent and controlled so as to produce consistent conditions for analyte desorption and ionization; 2) the mass analyzer behaves in a reproducible manner; and 3) the detection system produces a signal that consistently represents the arrival of ions of different masses.
    • 激光解吸/离子化飞行时间质谱仪(“LDI-TOF-MS”)装置和方法,可精确测量样品中所含分析物的质量,并测量样品中存在的分析物的量 从仪器到仪器的一致方式,以及随着时间的推移在单个仪器上。 特别地,本发明提供了LDI-TOF-MS装置和方法,其中:1)激光脉冲的能量和照射的样品的面积(注量)一致和控制,以便产生用于分析物解吸和电离的一致条件 ; 2)质量分析仪以可重复的方式进行操作; 和3)检测系统产生一致地表示不同质量的离子的到达的信号。