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6-2-5 Maintenance of ion source
(1) Check
item
1) Filament
There is continuity between pin 3 and pin 4 (filament 1) and between pin 7 and
pin 8 (filament 2).
2)
Ion source slit
To be free from contamination and discoloring
(2)
How to check
1)
Remove the top panel.
2)
The connector of the ion source comes in sight. Remove the connector.
3) To check the filament to see if it is burnt out, check continuity under this
condition. For replacement, follow the procedures in 4) and higher.
4) Remove the screw of the ion source flange and pull out the flange from the
analyzer tube.
5)
Remove the screw of the ion source support flange to remove the flange.
6) Loosen the focus electrode cap screw to remove the ion source from the ion
source flange.
7)
Reassemble the ion source by reversing the disassembling procedure.
* If the slit is contaminated, polish it with sandpaper of about #400.
* The ion source packing will be deformed if retightened firmly. If a fully fastened
ion source support packing is removed, replace the ion source packing with a new
one even if the ion source is not replaced.
* Install the ion source flange, to which the ion source has been attached, in the
correct orientation. Install it in such a way that the slit in the back of the analyzer
tube and the first slit intersect at right angles. (Match the
label on the flange
of the ion source with that on the analyzer tube flange.)
ION FOCUS CONNECTING
PORT
M4 BOLT
ION FOCUS
RUBBER PACKING
M4 BOLT
ION SOURCE
SLIT SYSTEM
ION SOURCE
SUPPORT FLANGE
Summary of Contents for HELIOT 301
Page 88: ......
