Princeton Instruments PI-MAX System - Gate Mode Experiments Examples; Experiment 1: Single Trigger Setup

126 PI-MAX/PI-MAX2 System Manual Version 5.F
Gate Mode Experiments - Examples
The combination of PTG and PI-MAX offers numerous possibilities in Kinetics mode.
But in all combinations underlying objective is to synchronize intensifier gate to CCD
shifting and to capture the time resolution of the event on the CCD. Presented below, are
two experiment scenarios that can be carried out with this instrumentation. User is
responsible for masking the intensifier (e.g., through Spectrograph/fiber optic
combination).
Experiment 1: Single Trigger
A single trigger arrives from user's experiment or is internally generated by the PTG. The
PTG generates multiple triggers (burst) based on that trigger. These triggers are used to
synchronize both the intensifier and the CCD shift. Figure 79 is a timing diagram for
Experiment 1.
Hardware Connections
 User's trigger pulse connected to Ext. Trig. In of PTG (optional)
 Aux. Out BNC of PTG connected to Ext. Sync. of ST-133
PTG Settings
 Trigger: External or Internal
 Pulsing: Continuous with constant Delay and constant Width, Burst Mode
(Number of pulses, period)
 AUX: delay is longer than Gate Width + Delay, but shorter than Burst period
Experiment Setup Settings
 Main: Gate Mode
 Timing: Single Trigger, +edge, disable Continuous Cleans, Shutter Control is
disabled open.
Conditions
 Gate Delay + Gate Width <= AUX delay
 Burst period >=AUX delay + shift time*
 Number of burst pulses >= Total number of Kinetic shifts
(* Shift time can be calculated by vertical shift rate and number of rows used in kinetic shifting.
For PI-MAX 1024 vertical shift rate is 30sec/row (PI-MAX 512  1.6sec/row).
If 10 rows are used in kinetic shift Total shift time = 10*30sec = 300sec)