Fermilab, Batavia
Fermilab has developed a TIG welding procedure that will attach a 9-cell 1.3GHz niobium cavity to a titanium helium vessel. These welds were designed to meet ASME Boiler & Pressure Vessel Codes, Division 1 and are full penetration welds. The cavities produced will be used in Japan’s S-1 Global cryomodule, Fermilab’s Project X cryomodules, International Linear Collider and the current Type IV Cryomodules (T4CM). Discussed in further detail will include: Setting up electron beam weld parameters for Ti transition rings for the cavities. On-going work with U.S. vendors to produce reliable helium vessels that pass mechanical inspections, vacuum requirements and X-rays. Tooling requirements for the assembly and alignment of the cavity to the helium vessel. Settings that are applied to the Glovebox environment to produce the best quality TIG welds. What test measurements are taken throughout the process to monitor the cavity for excessive cell deformation due to the heat loads from the welding, and results from HTS on the fist dressed cavity.
Fermilab, Batavia
RRCAT, Indore (M.P.)
KEK, Ibaraki
BARC, Trombay, Mumbai
Fermilab, in conjunction with our colleagues at KEK, RRCAT, and BARC, is developing several main linac SRF cryomodules in support of Fermilab’s Project X and the International Linear Collider. The Type IV Cryomodule (T4CM) will allow Fermilab to design, fabricate, and test our first cryomodule completed entirely in the USA. This cryomodule will also probe the stability question of mounting a magnet system under the center, fixed support post. Using the T4CM as the baseline, Fermilab and our Indian colleagues are developing a “unified” cryomodule for Project X which will allow for options to mount up to three magnets with either beta1 or beta.81 cavities. Fermilab has also supported the development of the S-1 Global cryomodule which will be built and tested at KEK. Fermilab’s commitment is to deliver two fully dressed cavities and all supporting components. To accomplish these designs, modern CAD tools using parametric designs, 3-D visualization JT files, and collaboration tools have been implemented. With these designs, Fermilab has spearheaded the effort to work collaboratively using a common database; DESY’s EDMS.