公开(公告)号：US06441896B1

公开(公告)日：2002-08-27

申请号：US09432625

申请日：1999-12-17

Applicant: Halden Field

Inventor： Halden Field

IPC: G01J142

CPC classification number: G01J1/4257 ,  G01J1/44

Abstract: A method and apparatus for measuring the spatial uniformity of the intensity of a radiation beam from a radiation source based on a single sampling time and/or a single pulse of radiation. The measuring apparatus includes a plurality of radiation detectors positioned on planar mounting plate to form a radiation receiving area that has a shape and size approximating the size and shape of the cross section of the radiation beam. The detectors concurrently receive portions of the radiation beam and transmit electrical signals representative of the intensity of impinging radiation to a signal processor circuit connected to each of the detectors and adapted to concurrently receive the electrical signals from the detectors and process with a central processing unit (CPU) the signals to determine intensities of the radiation impinging at each detector location. The CPU displays the determined intensities and relative intensity values corresponding to each detector location to an operator of the measuring apparatus on an included data display device. Concurrent sampling of each detector is achieved by connecting to each detector a sample and hold circuit that is configured to track the signal and store it upon receipt of a “capture” signal. A switching device then selectively retrieves the signals and transmits the signals to the CPU through a single analog to digital (A/D) converter. The “capture” signal. is then removed from the sample-and-hold circuits. Alternatively, concurrent sampling is achieved by providing an A/D converter for each detector, each of which transmits a corresponding digital signal to the CPU. The sampling or reading of the detector signals can be controlled by the CPU or level-detection and timing circuit.

Abstract translation: 一种用于基于单个采样时间和/或单个辐射脉冲来测量来自辐射源的辐射束的强度的空间均匀性的方法和装置。 测量装置包括位于平面安装板上的多个辐射探测器，以形成辐射接收区域，辐射接收区域具有接近辐射束横截面尺寸和形状的形状和尺寸。 检测器同时接收辐射束的部分，并将代表入射辐射强度的电信号传送到连接到每个检测器的信号处理器电路，并适于同时从检测器接收电信号并与中央处理单元进行处理 CPU）信号，以确定在每个检测器位置入射的辐射的强度。 CPU在所包含的数据显示装置上向测量装置的操作者显示对应于每个检测器位置的确定的强度和相对强度值。 通过连接到每个检测器来实现每个检测器的并行采样，该采样和保持电路被配置为在接收到“捕获”信号时跟踪信号并存储信号。 然后，开关装置选择性地检索信号，并通过单个模数（A / D）转换器将信号发送到CPU。 “捕获”信号。 然后从采样保持电路中取出。 或者，通过为每个检测器提供A / D转换器来实现并发采样，每个检测器向CPU发送相应的数字信号。 检测器信号的采样或读取可以由CPU或电平检测和定时电路来控制。