# Presentation: 143748

## Machine Status after Shutdown

**  ****Ron Moore – FNAL**

- All Experimenters' Mtg - 3 Feb 03

## Machine Status

- Linac – operating since last week
- No spare PA tubes; vendor to ship one 2/15; Brookhaven has 6, willing to send one
- Booster – operating since last week
- MKS05 extraction kicker failed / replaced with pinger
- Enough spare ferrites to build new pinger
- Main Injector – operating since Sunday AM
- Turn-on progressed smoothly
- Minor, but annoying, BPM and flying wire problems
- Providing 120 GeV protons for pbar commissioning
- Proton coalescing checked out this AM – back to nominal performance ~85% eff  250-270 E9 / bunch

- R. Moore - FNAL

- All Experimenters' Mtg - 3 Feb 03

## Machine Status

- Transfer Lines – not bad, need tweaking
- Different current readbacks after power supply work causing some hassles
- Pbar – stacking at modest level
- Need to tune P1, P2 transfer lines for small spot size
- Characterizing new production target
- Need to phase-in Debuncher, Accumulator cooling
- Recycler – almost ready for beam
- Replaced valve in R22 transfer line on Saturday; vacuum OK, waiting to test valves on Tuesday
- All correctors powered up OK

- R. Moore - FNAL

- All Experimenters' Mtg - 3 Feb 03

## Tevatron Status

- Turn-on progressed very smoothly (at first...)
- No ground faults to find
- No quenches during ramp tests up to 1005 GeV
- Shunt for the Main Injector dipoles now at C0 has been commissioned successfully
- Was essentially waiting for beam on Sunday when ground fault developed @ C34

- R. Moore - FNAL

- All Experimenters' Mtg - 3 Feb 03

## Tevatron Plans

- Warming up C3 to 300K to isolate ground fault and possibly replace a dipole or repair interface
- Warm up complete Tuesday evening
- While C3 is warm, unroll C32-1 quadrupole
- Roll is 3 mrad according the tiltmeter measurements done during shutdown
- Does not impact schedule
- Start turning-on Tev on Sunday 9 Feb?
- Resume post-shutdown commissioning (4-5 days)

- R. Moore - FNAL

- All Experimenters' Mtg - 3 Feb 03

## Magnet Rolls According to Tiltmeter

- R. Moore - FNAL

- All Experimenters' Mtg - 3 Feb 03

## Plan for Rest of Complex

- Continue post-shutdown commissioning activities
- Make sure everything else OK for Collider operation
- Complete tune-up of MI-8 line for MiniBoone running
- Recommission MI flying wires after shutdown work
- Stack to at least 100 mA by Friday
- Shoot pbars to Main Injector on Friday
- Exercise to verify readiness for Collider operation
- Take advantage of opportunity for extended study time until Tev is ready for HEP shot next week

- R. Moore - FNAL

- All Experimenters' Mtg - 3 Feb 03

## Weekly Schedule

- R. Moore - FNAL

- All Experimenters' Mtg - 3 Feb 03

## Summary

- Starting up the complex proceeded smoothly until Tevatron developed hard ground fault at C3
- Rest of complex tuning up as planned
- Tev house C3 warming to 300K to isolate fault, possibly replace C34-2 or C34-3 dipole
- Also unroll C32-1 quadrupole in that same house
- Tev turn-on begins Sunday (??), then begin the post-shutdown commissioning again (4-5 days)
- Other machines have opportunity for studies during Tev repair and recovery

- R. Moore - FNAL

- All Experimenters' Mtg - 3 Feb 03