Method and apparatus for measuring spatial uniformity of radiation
- Boulder, CO
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.
- Research Organization:
- Midwest Research Institute, Kansas City, MO (United States)
- DOE Contract Number:
- AC36-99GO10337
- Assignee:
- Midwest Research Institute (Kansas City, MO)
- Patent Number(s):
- US 6441896
- OSTI ID:
- 874690
- Country of Publication:
- United States
- Language:
- English
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apparatus
measuring
spatial
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beam
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based
single
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time
andor
pulse
plurality
detectors
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planar
mounting
plate
form
receiving
shape
size
approximating
section
concurrently
receive
portions
transmit
electrical
signals
representative
impinging
signal
processor
circuit
connected
adapted
process
central
processing
unit
cpu
determine
intensities
detector
location
displays
determined
values
operator
included
data
display
device
concurrent
achieved
connecting
sample
hold
configured
track
store
receipt
capture
switching
selectively
retrieves
transmits
analog
digital
converter
removed
sample-and-hold
circuits
alternatively
providing
reading
controlled
level-detection
timing
electrical signal
radiation detector
radiation source
switching device
radiation beam
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