1. G-2 Cryogenic System Restoration of G-2 Refrigerator for Proposed E969 Experiment WBS 1.11 Tony Nicoletti 2/8/06

2. Required Maintenance Purchase Spare parts for expansion engine ASME Recertify relief valves Valves have not been checked/inspected since G-2 inception Compressor maintenance Manufactured perform inspection/maintenance on compressors Replace polyflow tubing Tubing for pneumatic system Dried and cracking Replace valve positioners Most likely damaged due to water in pneumatic system Fix Known Helium Leaks Leaks to air and leaks to insulating vacuum

3. Reexamine Coalescers for potential oil carryover Installation of charcoal adsorbent system Revamp heat shield LN2 system Valves leak, rusted… Flow controllers on power leads Better control, monitoring of power lead flows Smaller heat shield valve on Inflector Adjustment is difficult Resize valve for application Modifications/Upgrades

4. Gas purification equipment Purchase small purifier to clean up system and prevent contamination during refrigerator operations. Revamp Magnet Warmup System Difficult to use Potentially hazardous Modifications/Upgrades

5. Controls Expander Speed Control PLC/programming Upgrade compressor, valve and dewar level controls Replace Temperature controllers

6. Refrigerator Operations The G-2 refrigerator ran at a higher average temperature last run Need to investigate to what extent, if any,oil has permeated the G-2 Refrigerator Exploring alternate options Using SSC Plan ‘B’ refrigerator

7. Cost Analysis