Difference between revisions of "Oct 4, 2021 - Tune Mode Generator"

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* John's thoughts : [[media:211004_TMG thoughts.docx]]
 
* John's thoughts : [[media:211004_TMG thoughts.docx]]
  
# Add tee on C macropulse TTL output to high-impedance input network scope to MCC for Ops => to log image when problem occurs
+
# At ISB => add tee on C macropulse TTL output to high-impedance input network scope to MCC for Ops => to log image when problem occurs
# Patch power meter head by spare cable to ISB scope => to observe fast transitions of laser power when problem occurs?
+
# At laser room + ISB => Patch power meter head by spare cable to ISB scope => to observe fast transitions of laser power when problem occurs?
# Compare wiring of Hall C RTP HV cable, are polarity leads reversed or different than others => to look for ground issue
+
# At laser room => Compare wiring of Hall C RTP HV cable, are polarity leads reversed or different than others => to look for ground issue
# Observe fast 20ns fast transition and hold ~100 msec when going from CW to beam sync => to test HV driver
+
# At laser room => Observe fast 20ns fast transition and hold ~100 msec when going from CW to beam sync => to test HV driver
# Leave C in CW for extended period of time, than test TM/VL modes and the fast 20ns transition => test if a HV driver chip heating issue
+
# At laser room => Leave C in CW for extended period of time, than test TM/VL modes and the fast 20ns transition => test if a HV driver chip heating issue
# Setup TMG taken from tunnel w/ same experience, test output into 1000:1 divider
+
# At Test lab => Setup TMG taken from tunnel w/ same experience, test output into 1000:1 divider
# Swamp SCAM module in the ISB => change in behavior, also monitor macropulse output
+
# At ISB => Swap SCAM module in the ISB => change in behavior, also monitor macropulse output
# Swap RTP cell => use spare or UITF cell => tests if we have an intermittent issue with RTP cell, maybe happens when RTP is OFF (i.e. CW) extended period
+
# At laser room => Swap RTP cell => use spare or UITF cell => tests if we have an intermittent issue with RTP cell, maybe happens when RTP is OFF (i.e. CW) extended period

Revision as of 09:47, 4 October 2021

Monday 10/4 @ 9am.

We'll be in TL-2236 and/or join by bluejeans: https://bluejeans.com/7572697097

Follow-up from meeting today

  1. At ISB => add tee on C macropulse TTL output to high-impedance input network scope to MCC for Ops => to log image when problem occurs
  2. At laser room + ISB => Patch power meter head by spare cable to ISB scope => to observe fast transitions of laser power when problem occurs?
  3. At laser room => Compare wiring of Hall C RTP HV cable, are polarity leads reversed or different than others => to look for ground issue
  4. At laser room => Observe fast 20ns fast transition and hold ~100 msec when going from CW to beam sync => to test HV driver
  5. At laser room => Leave C in CW for extended period of time, than test TM/VL modes and the fast 20ns transition => test if a HV driver chip heating issue
  6. At Test lab => Setup TMG taken from tunnel w/ same experience, test output into 1000:1 divider
  7. At ISB => Swap SCAM module in the ISB => change in behavior, also monitor macropulse output
  8. At laser room => Swap RTP cell => use spare or UITF cell => tests if we have an intermittent issue with RTP cell, maybe happens when RTP is OFF (i.e. CW) extended period