CHANNELPLATE HV RAMPING
In normal operations, when you power up and turn off the detector, take care NOT to have a difference of more than 5 kV between MCP and SCREEN. The following conditioning procedure is to be followed only after venting and bake-out.
- Apply voltage to the phosphor screen (Va) in +250V, 1 minute increments. Stop at +1.0 kV.
- Apply voltage to the channelplates (Vo) in +100V, 2 minute increments. Stop at + 1.0 kV.
- Increase the voltage to the phosphor screen (Va) in +100V, 5 minute increments to +3.0 kV. Wait 5 minutes.
- Increase the voltage to the phosphor screen (Va) in +100V, 10 minure increments to +4.0 kV. Wait 5 minutes.
- Simultaneously increase the voltage to the phosphor screen (Va)
and to the channelplates (Vo) in +100V, 10 minute increments to +5.5 kV at Va and +1.4 kV at Vo.
Total time about 6 hours.
|
