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Kanareykin, A.

Publications and source records attributed to Kanareykin, A..

4 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2022

DEMONSTRATION OF TWICE REDUCED LORENTZ FORCE DETUNING IN SRF CAVITY BY COPPER COLD SPRAYING

Superconducting RF (SRF) cavities usually are made of thin-wall high RRR Niobium that is susceptible to Lorentz Force Detuning (LFD) ? cavity deformation phenomena caused by high magnitude RF fields. This type of deformation can be mitigated by using an additional copper layer deposited on the outer surface of the cavity. In this paper, we present both modeling results and experimental data of high gradient test of an SRF cavity at cryogenic temperatures. It was demonstrated that LFD can be significantly reduced (factor of two) by the copper cold spray reinforcement without sacrificing cavity flexibility for tuning. We also present a finite-element model that allows us to confirm our experimental results and optimize the cavity geometry for LFD reduction with incorporated coupled RF, structural and thermal modules.

Kostin, R.↗
DOE OSTI2022

Nurturing the Industrial Accelerator Technology Base in the US

The purpose of this white paper is to discuss the importance of having a world class domestic industrial vendor base, capable of supporting the needs of the particle accelerator facilities, and the necessary steps to support and develop such a base in the United States. The paper focuses on economic, regulatory, and policy-driven barriers and hurdles, which presently limit the depth and scope of broader industrial participation in US accelerator facilities. It discusses the international competition landscape and proposes steps to improve the strength and vitality of US industry.

43 PARTICLE ACCELERATORS↗
DOE OSTI2021

Electrical and Thermal Properties of Cold-Sprayed Bulk Copper and Copper-Tungsten Samples at Cryogenic Temperatures

The de­vel­op­ment of high ther­mal con­duc­tiv­ity coat­ings with pure cop­per or cop­per-tung­sten alloy could be ben­e­fi­cial to im­prove the heat trans­fer of bulk Nb cav­i­ties for con­duc­tion cool­ing ap­pli­ca­tions and to in­crease the stiff­ness of bulk Nb cav­i­ties cooled by liq­uid he­lium. Cold-spray is an ad­di­tive man­u­fac­tur­ing tech­nique suit­able to grow thick coat­ings of ei­ther Cu or CuW on a Nb sub­strate. Bulk (~5 mm thick) coat­ings of Cu and CuW were de­posited on stan­dard 3 mm thick, high-pu­rity Nb sam­ples and smaller sam­ples with 2 mm x 2 mm cross sec­tion were cut for mea­sur­ing the ther­mal con­duc­tiv­ity and the resid­ual re­sis­tiv­ity ratio. The sam­ples were sub­jected to an­neal­ing at dif­fer­ent tem­per­a­tures and a max­i­mum RRR of ~130 and ~40 were mea­sured for the Cu sam­ples and CuW sam­ples, re­spec­tively.

Pokhrel, H.↗
DOE OSTI2021

Electrical and Thermal Properties of Cold-Sprayed Bulk Copper and Copper-Tungsten Samples at Cryogenic Temperatures

The de­vel­op­ment of high ther­mal con­duc­tiv­ity coat­ings with pure cop­per or cop­per-tung­sten alloy could be ben­e­fi­cial to im­prove the heat trans­fer of bulk Nb cav­i­ties for con­duc­tion cool­ing ap­pli­ca­tions and to in­crease the stiff­ness of bulk Nb cav­i­ties cooled by liq­uid he­lium. Cold-spray is an ad­di­tive man­u­fac­tur­ing tech­nique suit­able to grow thick coat­ings of ei­ther Cu or CuW on a Nb sub­strate. Bulk (~5 mm thick) coat­ings of Cu and CuW were de­posited on stan­dard 3 mm thick, high-pu­rity Nb sam­ples and smaller sam­ples with 2 mm x 2 mm cross sec­tion were cut for mea­sur­ing the ther­mal con­duc­tiv­ity and the resid­ual re­sis­tiv­ity ratio. The sam­ples were sub­jected to an­neal­ing at dif­fer­ent tem­per­a­tures and a max­i­mum RRR of ~130 and ~40 were mea­sured for the Cu sam­ples and CuW sam­ples, re­spec­tively.

Pokhrel, H.↗