LDX Project Status

April 15, 1999

Construction Status

Vacuum Vessel

The vacuum vessel fabrication was awarded in January, 1999. Vacuum Technology Associates (dba DynaVac) was selected as vendor. The design has been completed by the vendor and a design review was held at MIT in late March. All components and materials have been ordered by the vendor. The large sections of the vessel (the heads and the cylindrical wall) is expected to be received from the steel mill by the end of April. Initial leak checking is on schedule to begin at the end of June.

LDX Floating Coil Conductor

2 km of high performance Nb3Sn superconducting cable-in-channel conductor is currently being manufactured by IGC Advanced Superconductors in Waterbury, CT.

IGC solder trials on HP1 strand were completed on March 5. A blowup of the cross-section of this reacted cable is shown to the right. Below is a the full cross-section of the cable in copper channel. Samples of this soldered cable was sent to Brookhaven National Laboratory for for critical current and field properties at 4.2 K. The results will be compared to earlier tests of the cable prior to soldering into the copper channel to ensure that the glass-like cable was not damaged during the soldering process.

LDX Strand

The final two billets of strand was drawn in the week of April 12, 1999.

The strand for the outer (F4) floating coil was sent to LBNL in March for cabling. Shown to the right is the cabled LDX strand. Notice the increased superconductor fraction when compared to the above shown HP1 conductor.

Shown below is Taeyoung Pyon, Materials Research Engineer from IGC-AS and the LDX strand prior to shipment to LBNL.

The cabled conductor is currently awaiting heat treating at BNL.

Helium Pressure Vessel and Coil Form Fabrication

A. Zhukovsky and D. Garnier visited Ability Engineering on 3/25. Ability was provided with an updated statement of work and reference design for the helium vessel. Ability presented manufacturing drawings of (1) both coil forms and their mandrels, (2) the helium vessel shell, and (3) the supports of the coils inside the helium vessel. These drawings are now being revised with recommended changes by MIT.

The Inconel 625 elbows for the vessel were received by Ability but inspection discovered that they are undersized and they are being sent back to the manufacturer for re-sizing. A special measuring compasses is being built at Ability for future inspections of the half elbows and completed torus of the helium vessel.