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At least 217 records · Page 12
All sourcesNASA NTRSDOE OSTI
DOE OSTI2024

Standardization of Ancillary Installation Tooling for SRF Cavities at Fermilab

For assemblies of cavities in cleanrooms, single-use tooling systems are made for the alignment and installation of ancillary components such as couplers and bellows. To try and minimize the amount of tooling sets used, a design has been created to standardize alignment features to allow for assembly of different components with one set of tooling. A prototype set of tooling has been developed to with the required degrees of freedom for multiple assemblies while minimizing deformation during the assembly process. Prototype designs have been created for PIP-II SSR2 and 650 Cavities and for AUP Crab Cavities. Using 3D printing, this tooling can be quickly adjusted to allow for different ancillary components. The development process and status of the design will be discussed.

Narug, Colin↗
DOE OSTI2024

Testing of the SSR2 SRF Cavity Tuner for PIP-II at 2 K

The PIP-II linac will include thirty-five 325 MHz Single Spoke Resonators Type 2 (SSR2) cavities. Each cavity will be equipped with a tuner for resonance control. The tuner consists of mechanical frame with a motor for coarse frequency tuning and a piezoelectric actuator for fine frequency tuning. The tuner was tested for the first time at Fermilab on an SSR2 cavity. This dressed cavity-tuner system was tested at the single spoke testing cryo-stat (STC) in Fermilab at 2 K. The tuner performance was evaluated and is presented. Lastly, cavity-tuner mechanical modes were measured via the piezos.

Contreras-Martinez, C.↗
DOE OSTI2025

Performance Enhancement of Medium Temperature Baked Nb SRF Cavity by Surface Contamination Removal

Medium-temperature (mid-T) baking, typically conducted at 300 350 C, enhances the quality factor of niobium (Nb) superconducting radio frequency cavities. However, surface contamination introduced during vacuum furnace baking can limit the cavity performance. To investigate this effect, a 1.3 GHz single-cell Nb cavity underwent mid-T baking, followed by a chemical treatment to remove the surface contaminants. Post-treatment measurements revealed a significant improvement in both the quality factor and the quench field.

Chouhan, Vijay [Fermilab]↗
DOE OSTI2026

Advancing In-Situ Plasma Processing for SRF Cavities at Fermilab

This talk presents Fermilab’s experience with plasma processing applied to both elliptical and low-beta superconducting RF cavities. The development and implementation of the technique are compared across different geometries, with particular emphasis on constraints imposed by cryomodule assembly configurations. The talk also reports on systematic studies aimed at optimizing the processing recipe, including the exploration of various inert gas mixtures and oxygen concentrations. These results aim at providing guidance for tailoring plasma processing conditions to different cavity types and advancing plasma processing applicability in operational cryomodules.

Giaccone, Bianca [Fermilab] (ORCID:000000027275846↗
DOE OSTI2026

Advancing In-Situ Plasma Processing for SRF Cavities at Fermilab

This talk presents Fermilab’s experience with plasma processing applied to both elliptical and low-beta superconducting RF cavities. The development and implementation of the technique are compared across different geometries, with particular emphasis on constraints imposed by cryomodule assembly configurations. The talk also reports on systematic studies aimed at optimizing the processing recipe, including the exploration of various inert gas mixtures and oxygen concentrations. These results aim at providing guidance for tailoring plasma processing conditions to different cavity types and advancing plasma processing applicability in operational cryomodules.

Giaccone, Bianca [Fermilab] (ORCID:000000027275846↗
DOE OSTI2022

Design of axion and axion dark matter searches based on ultra high Q SRF cavities

The Superconducting Quantum Materials and Systems center is developing searches for dark photons, axions and ALPs with the goal of improving upon the current state-of-the-art sensitivity. These efforts leverage on Fermi National Accelerator expertise on ultra-high quality factor superconducting radio frequency cavities combined with the center research on quantum technology. Here we focus on multiple axion searches that utilize ~1E10 quality factor superconducting radio frequency cavities and their resonant modes to enhance the production and/or detection of axions in the cavity volume. In addition, we present preliminary results of single-mode and multi-mode nonlinearity measurements that were carried out as part of an experimental feasibility study to gain insight on the behavior of the ultra-high quality factor resonators and the experimental RF system in the regime relevant for axion searches.

43 PARTICLE ACCELERATORS↗