Table of Contents
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D
Data system
control over pumpdown, 33
controlling temperatures with, 34
using to ensure correct venting, 34
See also ChemStation
DC polarity, 225
Detector, 227
difficulty with the EM supply, 84
electron multiplier horn, 227
electron multiplier voltage, 227
replacing the horn, 170
steadily increasing EM voltage, 228
Detector focus lens, 227
DFTPP tune, 48
Diffusion pump, 198
automatic control of, 198, 199
effect of low fluid level in, 79
error messages related to, 85
part numbers, 264
reinstalling, 118
removing, 114
thermal switches, 199
See also Diffusion pump fluid
Diffusion pump fluid, 198
as a source of contamination, 90
checking, 110
replacing, 116
Disassembling the ion source, 148
Drawout plate and cylinder, 222
Drying cleaned ion source parts, 144
E
Electron multiplier (EM), 227
See also Detector
Electronics, 233 – 252
ac board, 241
ac-dc board. See low voltage power supply
danger to from electrostatic discharge, 100,
177
high voltage (HED) power supply, 243
HP-IB/MS control card, 240
locations of major components, 235
low voltage power supply, 243
main board, 238
maintaining, 177
part numbers, 256
power supplies, 243
signal amplifier board, 239
status display, 250
toroid transformer, 244
turbo pump controller, 252
Electrostatic discharge
danger to the electronics from, 100, 177
precautions to take against, 145, 177
EM
See also Detector
See Electron multiplier
EM voltage, 228
Emission current, 220
if there is none, 88
End plate O-rings, 192
Entrance lens, 222
Index
283
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