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Chapter 6
Timing Modes
This section offers a number of examples of how timing modes can be used in
conjunction with the PG-200 to synchronize data collection with an ICCD experiment.
Seven examples of the many possible gating modes are explained below. To simplify
matters, a laser system will be the experimental system in each case, although nearly any
type of experiment can utilize these schemes. There are many more possible experiment
interconnection schemes. If none of these seem to meet your experimental requirements,
contact the factory for other suggestions.
Any PI pulser with the appropriate range can be used in the setups below. Contact the
factory for information on the suitability of HV pulsers from other manufacturers.
Below is a table to direct the user to the most applicable example, given their specific
experimental conditions. The first column indicates the master timing element, which
dictates the timing for the entire experiment. The most common timing element is the
image producing equipment; in this case a laser. If this component is not a convenient
timing reference the controller or the HV pulser can be used as the master instead.
As a third option, a multichannel delay generator can be used as the timing element.
Because a delay generator allows one channel to be adjusted with respect to another, it
allows complete flexibility in controlling all aspects of the experiment. This, of course,
comes at the expense of an additional piece of equipment.
Timing Element
Example
Summary
Laser
1
Readout time of CCD is less than pulse interval of laser
2
Readout time of CCD is greater than pulse interval of laser
Controller
3
Laser is unsuitable for triggering
4
Unpredictable delay between laser trigger and image
Pulser
5
Delay between trigger from laser and image not long enough
6
Pretrigger for laser or other equipment needed
Delay generator
7
All aspects of experiment controlled by generator
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