GlueX Solenoid Recent progress and Coil cold tests Paul Brindza September 9, 2004

GlueX Detector and Solenoid

Solenoid showing new stand and Iron yoke fillers

GlueX Solenoid- Properties Max central field 25 KG Length 195 Inches Clear bore 73 Inches Weight of yoke 226 Tons Weight of Coils ~ 80 Tons Max current 1800 Amps Stored Energy 36 Mega Joules

GlueX Solenoid Recent Progress Coils #1 and # 2 are now complete! Refurbishment activities are complete and the coils are being prepped for storage and shipment to JLAB. Coils have been cold tested three times. Business Preparations for Coil 3 and 4 R&R are underway, expect start after October.

GlueX Solenoid Recent Progress Major new items in coils 1 and 2 include Six new Strain Gauges on coil supports to replace the mostly broken originals. Eight new PT-102 Platinum Resistance Thermometers on shield to replace original Thermalcouples ( still working) New Aluminized Mylar Multi Layer Insulation on Shields and coil of #2 cryostat

New MLI Insulation on Coil #2 Helium Vessel

GlueX Solenoid Recent Progress New Internal Conflat Flange Cryogenic connections on all four coils.8 per coil. These replace the original cut and weld joining technique. New 18 Inch vacuum bellows on coils 1,2 &4, Coil 3 TBD. Originals failed during first vacuum tests due to corrosion. New pump out flange on Coil #4.

GlueX Solenoid Recent Progress Coil #2 Leak in Helium Vessel near seal weld found and fixed. Coil #1 Shield leak found and fixed in supply pipe. Coil #2 piping error found and fixed. Two thirds of the shield in Coil #2 was isolated ie. non functional due to inlet and outlets found connected together.

GlueX Solenoid Recent Progress Coil #2 showed a 2 hour leak response during the final Helium Mass Spec. leak test indicating a possible 5 x 10 ^-8 torr-liter/sec leak in the shield. Coil #2 pressure test at 100 PSIG OK. Coil #1 passed its Helium Mass Spec. leak Test but failed its pressure test at ~30 PSIG! Coil #1 new leak was traced to corrosion in a LN2 supply line. Corrosion was confirmed at ODU. Coil #1 was repaired by replacing the pipe and retested.

New LN2 connection on Coil #1 Corrosion leak was near here.

GlueX Solenoid Recent Progress Due to the failure of the Coil #1 shield at low pressure during pressure testing, a decision was reached to do a cold test of coils 1 and 2 shields with LN2. Helium Mass spec. leak tests would be performed before, while cold and after warming. Test sequence repeated three times for each coil.

GlueX Solenoid Recent Progress Coils one and two passed all cold tests with no indication of leaks on a Helium Mass Spec. Leak detector with typical sensitivity of ~ 7 x 10^-10 torr-liter/sec! Coils one and two passed pressure tests at 100 PSIG! New instrumentation works Too! This engineer sleeps thru the night again!

Cold test gear and Temp. readout

Robin Strain starts the LN2 Coil 2

Bill Losowski and Leak Detector

Lead Tech Jeff Self, Suzie and Buckwheat

IUCF management nods its approval

GlueX Solenoid-Conclusions GlueX has two really good coils now! Coils 3 and 4 rework to be complete in FY JLAB Test Lab Space for Solenoid assembly and test secured and available for occupancy in January 2005.

GlueX Solenoid-Cost and Schedule Detailed schedule with resources to complete solenoid thru installation. Time phased cost to complete installation in 2009 with a yearly expenditure of ~300K$! Significant limitation is manpower availability. Techs for solenoid assembly and test, Mechanical designer for new solenoid components. Controls software seems OK.

GlueX Solenoid – Cost summary Cost to move from LANL 368 K$ Cost of New DC system 132 K$ Cost of refurbishment to date 297 K$ No JLAB salaries included so far! Cost to complete refurbishment 1467 K$ This includes cold testing in Test Lab. Cost to Install in Hall D 175 K$