Publications (7)
Effect of Electropolishing on Nitrogen Doped and Undoped Niobium Surfaces
V. Chouhan, F. Furuta, M. Martinello +2
Cold electropolishing (EP) of a nitrogen-doped (N-doped) niobium (Nb) superconducting RF (SRF) cavity was found to improve its quality factor. In order to understand the effect of…
Improving the performance of mid-T baked niobium cavities through post-bake surface treatment
V. Chouhan, D. Bice, A. Cravatta +7
The Medium temperature (mid-T) baking of niobium superconducting radio-frequency cavities at 300 350  C in a vacuum furnace is known to enhance the quality factor (Q₀).…
Study on Electropolishing Conditions for 650 MHz Niobium SRF Cavity
V. Chouhan, D. Bice, F. Furuta +8
The PIP II linear accelerator includes different types of niobium SRF cavities including 650 MHz elliptical low (0.61) and high (0.92) beta cavities. The elliptical cavity surface…
Performance Enhancement of Medium-Temperature Baked Niobium SRF Cavity by Surface Contamination Removal
V. Chouhan, D. Bice, A. Cravatta +5
Medium temperature (mid-T) baking, typically conducted at 300 350 C, enhances the quality factor of niobium (Nb) superconducting radio frequency cavities. High vacuum furnace bakin…
Latest Development of Electropolishing Optimization for 650 MHz Niobium Cavity
V. Chouhan, D. Bice, D. Burk +15
Electropolishing (EP) of 1.3 GHz niobium superconducting RF cavities is conducted to achieve a desired smooth and contaminant-free surface that yields good RF performance. Achievin…
Low Particulates Nitrogen Purge and Backfill During Prototype HB650 Cryomodule String Assembly
T. Ring, M. Quinlan, G. Wu
A low particulate vacuum and purging system was developed to support PIP-II cryomodule string assembly. The overpressure can be controlled at a precision of 1 mbar above the atmosp…