# Presentation: 537366

## Beam off for most of last week
Horn repair
Brief running over weekend
Turned off this morning for dehumidifier repair
A few detector problems over the week

- Horn repair
- Brief running over weekend
- Turned off this morning for dehumidifier repair
- A few detector problems over the week

## Horn 2 Repair
Replaced 3 ceramic breaks on horn 2 water lines
One had been leaking
The second looked suspicious
The third was replaced pre-emptively
All horn 2 ceramic breaks have now been replaced with newer, more reliable style
Horn 2 was optically surveyed in place to within 0.5 mm of desired position
Horn pulsed and operated over weekend
Raw System Repairs
Fixed 2 minor leaks
Pipe leading to RAW skid
Pump seal (pump was replaced)

- Replaced 3 ceramic breaks on horn 2 water lines
- One had been leaking
- The second looked suspicious
- The third was replaced pre-emptively
- All horn 2 ceramic breaks have now been replaced with newer, more reliable style
- Horn 2 was optically surveyed in place to within 0.5 mm of desired position
- Horn pulsed and operated over weekend
- _Raw System Repairs_
- Fixed 2 minor leaks
- Pipe leading to RAW skid
- Pump seal (pump was replaced)

## Target Hall Dehumidifiers
Turned off this morning for Munters personnel to repair dehumidifiers
Damaged heating coils being replaced
Demisting plates added to ensure water flow out the drain
Munters will tune flow rates and settings to optimal
Should be finished tomorrow afternoon 

- Turned off this morning for Munters personnel to repair dehumidifiers
- Damaged heating coils being replaced
- Demisting plates added to ensure water flow out the drain
- Munters will tune flow rates and settings to optimal
- Should be finished tomorrow afternoon

## Beam Operations
Quicker than expected repair of horn 2 allowed a pilot run over the weekend before Munters arrived to work on dehumidifiers
Short tuning period kept us at 6 turns (~185 kW)
Hope to come up quickly this week to 7 then 8 turns (215-245 kW)
 About 1e18 additional protons delivered through this morning

- Quicker than expected repair of horn 2 allowed a pilot run over the weekend before Munters arrived to work on dehumidifiers
- Short tuning period kept us at 6 turns (~185 kW)
- Hope to come up quickly this week to 7 then 8 turns (215-245 kW)
-  About 1e18 additional protons delivered through this morning

- _NEAR DETECTOR_:    Alec Habig
- 99.68% livetime for beam (no problems)
- Magnet was off for a few days last week (cosmics)
- Pipe carrying sump water to the LCW exchanger was changed from stainless to PVC
- Bacteria eat the steel and clog up the cooling circuit

- _FAR DETECTOR_:    Bill Miller
- 87.8% livetime this week for cosmics
***60.5% ***livetime for beam
- 2 problems causing downtime:
- Improper cosmics run configuration on Wednesday led to only part of the detector being read out
- Would probably have been caught be a shifter (none b/c of no beam)
- Saturday with beam: UPS failed and took a breaker with it
- Problem was quickly noticed and diagnosed by shifter at Fermilab
- Unable to repair until morning because we no longer have 24/7 shaft access
- Was fixed Sunday morning when we regained access
- About 3.3e17 of beam was lost at far detector