Radiabeam Technologies, LLC

Radiabeam Technologies, LLC, a Santa Monica-based manufacturer of advanced particle accelerator components and radiation technologies, operates as a small business prime contractor (97% of awards) and occasional subcontractor on federal research and development programs across defense, energy, and scientific agencies. The company competes predominantly under Small Business Innovation Research and Small Business Technology Transfer (SBIR/STTR) set-asides, which dominate its prime footprint; all SBIR Phase I and II awards carry Total Small Business designations. Radiabeam's work spans compact accelerator systems, superconducting radiofrequency cavities, tunable gamma-ray and X-ray sources, and advanced radiation technologies for testing, nondestructive evaluation, and nuclear waste transmutation.

The company's customer concentration reflects its deep positioning in federal R&D. The Defense Advanced Research Projects Agency anchors the portfolio by potential value at $32.1 million across 11 awards, followed by the Department of Homeland Security Countering Weapons of Mass Destruction at $12.1 million (3 awards), the Department of the Air Force Materiel Command Research Laboratory at $6 million (11 awards), the Department of the Navy Naval Sea Systems Command at $2.1 million (4 awards), and the DOD Missile Defense Agency at $1.8 million (3 awards). By award count, the Department of Energy Office of Science and the Department of Energy together account for 85 awards (73% coverage of the portfolio), though these represent smaller per-award values consistent with DOE's Office of Science research grants and cooperative agreements. The split between award volume and dollar concentration signals a portfolio mixing high-value defense R&D contracts with numerous smaller energy-science grants.

Radiabeam's capability maturity sits with DARPA, which has funded a sustained pipeline of gamma-ray and accelerator innovation. Representative Phase II SBIR work includes the Advanced Sources for Single-Event Effects Radiation Testing (ASSERT) program ($10.5 million, March 2024) for single-event effect testing of 3D heterogeneously integrated circuits, the Source of Tunable Intense Gamma Rays (STINGRAY) program spanning two concurrent Phase II efforts worth $1.8 million and $1.8 million (awarded September 2022), and the Advanced Concept Compact Electron Linear-Accelerator (ACCEL) program with two concurrent Phase II contracts worth $1.8 million each (awarded November 2022) as an industrial partner in the SLAC-led consortium. Air Force Research Laboratory funding includes a $1.8 million Phase II SBIR for L-band beam modulators for X-band linear accelerators (March 2026) and earlier-phase work on X-band RF linear accelerators and L-band modulators. The company also holds a $3 million Phase II SBIR from DARPA (May 2024) for inverse Compton scattering gamma-ray source development.

Recent grant work through the Department of Energy Advanced Research Projects Agency (ARPA-E) under the Nuclear Energy Waste Transmutation Optimized Now (NEWTON) program reflects capability scaling. Radiabeam received two competitive cooperative agreements in early 2026: $1.873 million (April 2026, CFDA 81.135) for superconducting niobium-tin radiofrequency cavities for 10 MW proton linacs, and $1.44 million (February 2026, CFDA 81.135) for thin-film niobium-tin superconducting cavities for accelerator-driven waste transmutation systems. The Department of Energy Office of Science (CFDA 81.049) has funded multiple project grants for accelerator component and beam-dynamics research, including work on superconducting undulators, plasma photocathodes, synchrotron beamline assembly automation, and rare-isotope beam degraders, typically in the $150 thousand to $400 thousand range, with completion dates through 2027.

Activity data show growth from four awards in 2022 to nine in 2025, with five awards logged year-to-date in 2026. Eight awards carrying $14.4 million in combined potential value are scheduled for completion within the next twenty-four months, presenting significant recompete exposure in advanced accelerator and radiation-source work. Radiabeam's subcontractor footprint is minimal (3% of awards); recent sub work includes a professional services agreement under the Los Alamos National Laboratory Integrated Governance Framework competition managed by Triad National Security (May 2026), a large-area photocathode subsystem development engagement (August 2025), and a high-frequency high-power HPEM source development subcontract to Leidos (June 2025). Grant sub-awards position Radiabeam as a subsystem developer for University of California San Francisco linac upgrades supporting FLASH dose-rate research, with engineering and fabrication tasks for modulators, X-ray targets, and beam diagnostics.

Radiabeam operates as a parent entity with one named subsidiary, Radiabeam Systems, LLC, also structured as a for-profit limited liability company. The corporate identity and footprint are anchored in Santa Monica with work performed primarily at the company's facility, though place-of-performance designations on recent SBIR awards include Eglin Air Force Base, Florida (AFRL Phase II) and dispersed federal laboratory locations for collaborative R&D. The vendor's combined potential value across 153 awards stands at $61.2 million, though obligated amounts ($138.8 million) exceed potential value by 227 percent, reflecting multiple phases of SBIR progression, cooperative agreement increments, and cost-plus-fixed-fee structures that generate cumulative obligations beyond ceiling values. The primary NAICS classification centers on Research and Development in the Physical, Engineering, and Life Sciences (26 awards), consistent with the defense and energy science R&D mission set.

We design and build particle accelerator components, such as diagnostic systems, magnetic optics, and accelerating structures (RF guns/photoinjectors).