Vertical Test Stand (VTS)

The Fermilab Vertical Cavity Testing Facility (VCTF) consisting of the first Vertical Test Stand (VTS1) has been operational since 2007 and is being used to test 1.3 GHz single-cell and nine-cell niobium cavities and single spoke resonators. The VTS1 however is not sufficient to meet the requirements of the upcoming Project-X. An upgrade of the facility to increase the cavity testing capacity which would better align it to the Project X needs is underway.

Fermilab is planning to add two additional VTS’s (2&3) to the existing system and support them with an upgraded cryogenic system. The new VTS’s will be capable of testing 1.3GHz and 650 MHz Super Conducting Radio Frequency (SCRF) cavities as well as the various single spoke resonator cavity designs. The Indian Institutions are planning on building a VTS facility at Raja Ramanna Centre for Advanced Technology (RRCAT), Indore. This common interest paves the way for a strong collaboration.

The Indian Institution scientific staff visited Fermilab and participated in the operation of VTS1 to gain valuable experience. Fermilab also provided the design specification, drawings, software and operational details of the RF system and DAQ and control systems for the VTS1. Indian Institutions participated in the VTS 2&3 cryostat design efforts working together with Fermilab to design the various components of the cryostat, including the liquid Helium vessel, the 80K shield, the vacuum vessel, the top insert plate, and so on. 

After a successful design review in early 2010, and review of proposals submitted in response to an RFP, Ability Engineering was awarded the contract to fabricate three VTS cryostats (VTS 2 & 3 for Fermilab, and an additional VTS cryostat for Indian Institutions), under the supervision of engineers from Fermilab and Indian Institutions.

The first new cryostat, VTS-2, was delivered to Industrial Building 1(IB1) on March 28, 2011 and it passed the initial acceptance tests. Representatives from the Indian Institutes witnessed the initial acceptance testing which provided them valuable experience. Measurement of the background magnetic field before and after the installation of magnetic shields for VTS-2 has been performed, and the VTS-2 cryostat has now been installed in its pit at Fermilab. The VTS-3 cryostat was delivered in early October 2011, and all the initial acceptance tests were completed with satisfactory results.

VTS 2
VTS2 delivered to Fermilab in March 2011 (click on image for a bigger version of the pictures)

The cryostat for delivery to RRCAT was completed by the end of January 2012, and initial acceptance tests were performed at the vendor.  These tests were witnessed by an RRCAT representative and the results of these initial tests on the RRCAT cryostat were satisfactory. In January 2012, arrangements were finalized regarding the selection of vendors to arrange for the crating and shipping logistics. The cryostat was crated on February 17, 2012 and the unit was placed in the container and dispatched to New York on February 28 2012. The unit was shipped in March 2012 and its arrival in India (at the port of Nhava Sheva) is expected 6 to 8 weeks later. 

Once the Indian VTS cryostat is delivered, Fermilab would provide assistance in installation and commissioning of the systems at RRCAT, Indore.  The building to house the VTS is under construction at RRCAT and is expected to be ready soon. RRCAT is also working on developing the RF, DAQ and cryogenic system for their VTS.

VTS 2& 3 Technical Specification Documents:

  1. Vertical Test Stand Project
  2. Vertical Test Stand Safety Documents
  3. Functional Requirements Specification
  4. Statement of Work
  5. Project Management Plan
  6. Technical Requirements Specification
  7. Technical Design Report
  8. Final Design Review

Additional VTS-related documents in SharePoint (login required)