APGC: TQXS - High RSD- Repeated corona pin instability with APGC - WKB117656
Article number: 117656
SYMPTOMS
- Corona current bounces around set point
- High RSD on Int Stds as beam drops in and out.
- Pin was cleaned and replaced
- Ceramics are clean
ENVIRONMENT
- APGC
- Xevo TQ-XS
CAUSE
Corona pin grounds to the surface of the APGC ion chamber. Over time, this surface becomes very dirty and affects corona stability.
FIX or WORKAROUND
Clean or replace the APGC chamber (700005457).
ADDITIONAL INFORMATION
id117656,