公开(公告)号：US5915269A

公开(公告)日：1999-06-22

申请号：US59927

申请日：1998-04-14

申请人： Jerry E. Cahill ,  David H. Tracy

发明人： Jerry E. Cahill ,  David H. Tracy

IPC分类号： G01N30/02 ,  G01N30/60 ,  G01N30/86 ,  G01N30/88 ,  B01D15/08 ,  G06F15/20

CPC分类号： G01N30/8693 ,  G01N30/88 ,  G01N2030/025 ,  G01N2030/8804 ,  G01N30/6095 ,  G01N30/8658

摘要： In a gas chromatograph system having a column with a stationary phase and a carrier gas moving through the column to contact the stationary phase, the system being useful for detecting analytes in a sample, a method and apparatus for predicting the retention times for the analytes under various conditions, the method utilizing the steps of:a) detecting the analytes under a number of sets of given conditions;b) calculating values for various parameters characteristic of the system based on a mathematical model that includes a correction to compensate for the permeability of said column to said carrier gas;c) entering into the model the values for the characteristic parameters and at least one further set of conditions; andd) using the model to predict retention times for conditions other than those of step a;the apparatus composed of a data handling system including a model for predicting retention times at a variety of conditions of operation of the system, the model having a first set of inputs including retention times determined during a number of operating condition sets; and a second input representative of the permeability of the column to the carrier gas, the data handling system possessing a prediction mechanism for putting into the model a set of conditions other than those of a) above and for putting in the set of parameters, and for predicting retention times for those conditions other than those of a).

摘要翻译： 在具有固定相的柱和载气通过柱接触固定相的气相色谱系统中，该系统可用于检测样品中的分析物，用于预测分析物的保留时间的方法和装置 各种条件，所述方法采用以下步骤：a）在多种给定条件下检测分析物; b）基于包括补偿所述柱对所述载气的渗透性的校正的数学模型计算系统的各种参数特性的值; c）向模型中输入特征参数的值和至少一组另外的条件; 以及d）使用该模型预测除了步骤a之外的条件的保留时间; 该装置由包括用于在系统的各种操作条件下预测保留时间的模型的数据处理系统组成，该模型具有包括在多个操作条件集合中确定的保留时间的第一组输入; 以及表示所述列对所述载气的磁导率的第二输入，所述数据处理系统具有预测机构，用于将与上述a）不同的一组条件放入所述模型中，并用于投入所述参数集合;以及 用于预测除a）之外的条件的保留时间。

公开(公告)号：US5412468A

公开(公告)日：1995-05-02

申请号：US28515

申请日：1993-03-09

申请人： Peter L. Lundberg ,  Michael I. Crockett ,  David H. Tracy

发明人： Peter L. Lundberg ,  Michael I. Crockett ,  David H. Tracy

IPC分类号： G01J3/28 ,  G01J3/36 ,  G01J3/32

CPC分类号： G01J3/2803 ,  G01J3/027

摘要： Spectral bands are grouped for data acquisition in a spectrophotometer with a charge-coupled detector having a plurality of pixels. Preliminary data is generated on time-integrated radiation to the pixels for a sample. Maximum permitted exposure times for the pixels are calculated from the data and a predetermined maximum exposure. The maximum times are grouped so that for each group the ratio of the highest to the lowest maximum times is less than 100. A group run time is established for each group nominally less than the lowest maximum time in the group. Subgroups are created and ordered so that accumulated readout times for the pixels are less than wait times established to prevent readout contamination from subsequent charge buildup. The spectrophotometer is further operated on the sample for the run time of each group and subgroup to generate spectral data.

摘要翻译： 光谱带被分组用于在具有多个像素的电荷耦合检测器的分光光度计中进行数据采集。 将时间积分辐射产生初步数据给样本的像素。 从数据和预定的最大曝光计算像素的最大允许曝光时间。 最大时间被分组，使得对于每个组，最高到最低最大时间的比率小于100.对于组中名义上小于组中最低最大时间的组，建立组运行时间。 子组被创建和排序，使得像素的累积读出时间小于建立的等待时间，以防止后续电荷累积的读出污染。 分光光度计进一步在样品上运行，用于每组和亚组的运行时间，以产生光谱数据。

公开(公告)号：US4804978A

公开(公告)日：1989-02-14

申请号：US157755

申请日：1988-02-19

申请人： David H. Tracy

发明人： David H. Tracy

IPC分类号： G03F7/20 ,  H01L21/027 ,  H01L21/30 ,  G01D9/42 ,  G01D15/10

CPC分类号： G03F7/70041 ,  G03F7/70558

摘要： A photolithography exposure control system tolerant of noisy pulsed light sources having a controllable variable attenuator. A detector monitors the exposure dose of a light pulse enabling a controller to trigger another light pulse, when a predetermined attenuator is positioned in its path. A high degree of exposure control is achieved with a minimum number of light pulses or shots.

公开(公告)号：US4795257A

公开(公告)日：1989-01-03

申请号：US24237

申请日：1987-03-10

申请人： David H. Tracy ,  Stephen A. Myers

发明人： David H. Tracy ,  Stephen A. Myers

IPC分类号： G01J3/36 ,  G01J3/20

CPC分类号： G01J3/36

摘要： A Rowland circle-type polychromator with the Rowland circle arc pivotally connected to the concave grating. Separate adjustments are provides for shifting the spectral lines and focussing. A tie rod is used to adjust the focus of the spectral lines. Dectectors are predeterminedly spaced along the arc to simultaneously detect unique spectral lines for analysis of multiple elements contained in a single sample.

公开(公告)号：US4640627A

公开(公告)日：1987-02-03

申请号：US526758

申请日：1983-08-26

申请人： David H. Tracy ,  Michael J. O'Brien ,  Walter Bohler

发明人： David H. Tracy ,  Michael J. O'Brien ,  Walter Bohler

IPC分类号： G01J5/00 ,  G01J5/04 ,  G01J5/34 ,  G01J5/60 ,  G01N21/73 ,  H05H1/30 ,  H05H1/36 ,  G01J5/10

CPC分类号： G01J5/041 ,  G01J5/0014 ,  G01J5/0018 ,  G01J5/08 ,  G01J5/0834 ,  G01J5/0893 ,  H05H1/30 ,  H05H1/36 ,  G01J5/34 ,  G01N21/73

摘要： An apparatus for monitoring a plasma torch includes a dedicated photometer which produces a signal representative of the temperature of a quartz tube of the torch, which signal can be used to reduce the temperature thereof.

摘要翻译： 用于监测等离子体焰炬的装置包括专用光度计，其产生代表手电筒的石英管的温度的信号，该信号可用于降低其温度。

公开(公告)号：US4612077A

公开(公告)日：1986-09-16

申请号：US759819

申请日：1985-07-29

申请人： David H. Tracy ,  Donald L. Smith

发明人： David H. Tracy ,  Donald L. Smith

IPC分类号： H01J37/32 ,  C23F1/02 ,  B44C1/22 ,  C03C15/00

CPC分类号： H01J37/3244

摘要： An electrode includes a plurality of nested concentric rings forming plenum chambers. Process gas is fed into the plenum chambers through capillary tubes. The gas is then delivered through slits between the rings into a plasma etching reactor.

摘要翻译： 电极包括形成增压室的多个嵌套同心环。 工艺气体通过毛细管进入增压室。 然后将气体通过环之间的狭缝输送到等离子体蚀刻反应器中。