Isoprime User’s Guide
Version 1.02 IsoPrime100 User’s Guide Page 84 of 219
undefined parameters and those assigned with a value of 0 are then tuned for maximum
sensitivity.
OPTIMISATION BY SCANNING SOURCE PARAMETERS
It is advisable to set the trap current (TR) to a required value (depending on required sensitivity)
before modifying other source parameters.
Run an Extraction Voltage scan (Acquire, Run Scan, EX Scan). Using the display window, drag the
current bar to optimise. Ensure that the EX% is not higher than the maximum. Never run with
the EX% over the top of the peak.
Run a scan for the half plates (HP Scan). Optimize this setting.
Optimise the ion beams for the Ion Repeller (IR), but stay within the recommended range.
Optimise the ion beams for the Electron Volts (EV), but stay within the recommended range.
Optimise the ion beams for the Z Plates (ZV).
Repeat the sequence above until the ion beam currents change only by small amounts.
Save the optimised Source parameters.
Half
Plates
Ion
Repeller
Electron
Volts
Z Plates
Extraction
Voltage
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