User's Manual

TES-63 Source
User manual – version 06/2021
Page 43/46
Polygon Physics SAS au capital social de 72 000 euros - 19, rue de Sassenage - 38600 Fontaine
SIREN 799 584 453 RCS Grenoble - TVA intracommunautaire FR 19 799584453 - APE 2899B
8.2 Troubleshooting guide
Issue
Possible root cause
Corrective action
No ignition or the
source turns off
Too low gas flow, or
no gas flow
• Change the empty gas cylinder,
• Increase the input pressure before the
regulating valve / flowmeter,
• Make sure the gas valve cable is plugged
Too high pressure
• Check for air leak in the vacuum chamber
• Perform a turbopump maintenance
• Set a lower gas flowrate setpoint
No HF power
• Make sure the interlock is closed
Dirty surfaces,
unstable ion source
operating point, too
much acceleration
voltage
• Perform a high voltage conditionning
sequence
• reduce the voltages
No high voltage
Interlock open or
shortcut to ground
• Make sure the interlock is closed
• check for high voltage overcurrent
Current drift
Unstable ion source
operating point
• Change the operating pressure
• Change the operating UHF power
Current jumps
Not enough UFH
power, not enough
gas
• Increase the UHF power
• Increase the gas flow rate
Beam current is too
low
Not enough UFH
power, not enough
gas, voltage
difference between
beam and focus is
too low
• Increase the UHF power
• Increase the gas flowrate
• Lower the focus voltage compared to the
beam voltage (maximum allowed
difference = 5kV. Will make the ion beam
more divergent)
Pressure reading does
not change when
changing the valve
setpoint
Valve not connected;
rack not powered.
• Make sure that the D-Sub 9 cable the
rack and the gas regulating valve is
properly connected
• Make sure that the rack is powered,
and that its power switch is on
Message ‘serial
connection failed
when lauching the IE
gun Labview
application program
RS232 cable not
connected, I/O
board freeze,
Labview freeze.
• Make sure that the RS232 cable
between the rack and the PC is
properly connected
• Close the program, disconnect and
reconnect the serial and restart the
program