# SAM #RFP384239

Fabrication and delivery of two 1.3 GHz conduction-cooled SRF cavities

**Buyer:** Fermilab
**Posted:** October 20, 2026
**Respond By:** November 04, 2026
**Identifier:** RFP384239
**NAICS:** 332313, 332710

Fermilab is seeking two custom-fabricated 1.3 GHz superconducting radiofrequency cavities and associated fabrication, inspection, and delivery services.
- **Government buyer:** Fermi National Accelerator Laboratory (Fermilab), U.S. Department of Energy; Technical Division - Design and Drafting. The procurement is supported by FNAL.
- **Named organizations and suppliers:** Fermi National Accelerator Laboratory/FNAL and Fermi Forward Discovery Group, LLC (FermiForward) are named. **SENSR** is identified as the supplier/manufacturer of the GP1 Accelerometer. No cavity fabricator or other prospective vendor is named.
- **Main products:** Two ERDC 9-cell, 1.3 GHz conduction-cooled superconducting radiofrequency (SRF) cavities. The parts-and-pricing attachment also lists two units of ERDC Cavity Fabrication. The drawings provide a detailed bill of materials with Fermilab part numbers, listed below.
- **Fabrication and delivery:** The vendor must plan and fabricate the cavities using Fermilab-supplied niobium and Nb55Ti, drawings, and a 3D STEP model. Work includes developing fabrication drawings and plans, tooling and welding fixtures, electron-beam welding parameters, inspections and testing, documentation, protected packaging, and shipment to FNAL.
- **Key technical requirements:** Cavities require dimensional and optical inspections and helium leak checks, with vacuum-tight weldments, ultra-high-vacuum cleanliness and handling, specified weld and concentricity tolerances, tuning allowances, and serialization of the end disk flange. Vendors must document prior experience fabricating conduction-cooled cavities. Each crated shipment must include a FNAL-supplied SENSR GP1 Accelerometer.
- **Optional services:** Proposal options are requested for CMM measurements of both completed cavities and eddy-current scanning of raw niobium sheets, including procedures for the scanning.
- **Additional attachment requirement:** FermiForward's subcontractor annual representations and certifications form covers company and compliance information. Its certifications are effective for 12 months from signature, and changes must be reported within 15 days.
- **Schedule:** No fixed performance dates or duration are stated. The vendor is to propose the fabrication, inspection, and delivery schedule for FNAL review.

### Description

<p>Cavity</p>

[View original listing](https://sam.gov/opp/2901731b251b41148c83edf658ec53f3/view)