TITLE: 02/12 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Preventive Maintenance
INCOMING OPERATOR: None
SHIFT SUMMARY:

Today was a full Maintenance Day with LHO Site opening up after being closed for last 3-days due to snow.  Notable items:

1. X-Arm is CLOSED!  (and blocked with a vehicle.  This arm as not been plowed yet.)
2. PSL CHILLER WORK CONTINUES:  PSL Chiller work is running long due to leak which was taking longer to address than expected (as of 3:30, heard it was going to be on the order of hours....or days?).
3. Y-arm Gate Vaves CLOSED:  MY Ion Pump is currently being craned into place.  Next up will be opening Y-arm gate valves at MY.

LOG:

• Snow plowing in the morning as well as prep work for MY ion pump work.
• 18:54 TCSy CO2 alignment work (Danny & TJ)
• 19:33 Several SEI & SUS systems tripped....corresponding with loud bang heard from Control Room...suspecting this is from a big chunk of ice crashing nearby.
• 19:35 Magnetometer installation in/near CER at the Diode Room (Robert, Kara)
• 19:40 CDS crash of several front ends (noticed this as I was recovering from SEI/SUS trips.  Dave contacted.
• 20:21-23:00 ISCT6 work (Nutsinee)
• 20:50 ETMx & y Charge Measurements (Corey)
• 21:55 - 22:55 EX install new illuminator chassis and work on HV power supply (Fil & Marc)
  • White SUV is stuck midway between LVEA & MX.
• BS Guardian transition investigation by Jenne
• 0:02 Installing shakers (Robert, Kara)