Zobrazeno 1 - 10
of 621
pro vyhledávání: '"Posen, P."'
Autor:
Fedderke, Michael A., Harnik, Roni, Kaplan, David E., Posen, Sam, Rajendran, Surjeet, Serra, Francesco, Yakovlev, Vyacheslav P.
We describe a gyroscope that measures rotation based on the effects of the rotation on the polarization of light. Rotation induces a differential phase shift in the propagation of left and right circularly polarized light and this phase shift can be
Externí odkaz:
http://arxiv.org/abs/2406.16178
Despite having advantageous superconducting properties, Nb3Sn superconducting radiofrequency (SRF) cavities still have practical challenges compared to Nb SRF cavities due to the brittle nature of Nb3Sn. Performance degradation can occur when a Nb3Sn
Externí odkaz:
http://arxiv.org/abs/2405.00211
Autor:
Zhai, Gan, Halperin, William P., Reyes, Arneil P., Posen, Sam, Sung, Zuhawn, Tarantini, Chiara, Brown, Michael D., Larbalestier, David C.
The superconductor Nb$_3$Sn has a high critical temperature and high critical field, widely used for high-field superconducting magnets. In this work we investigate its microscopic electronic structure with $^{93}$Nb nuclear magnetic resonance (NMR).
Externí odkaz:
http://arxiv.org/abs/2311.00841
Autor:
Contreras-Martinez, C., Giaccone, B., Melnychuk, O., Netepenko, A., Pischalnikov, Y., Posen, S., Yakovlev, V.
Two 2.6 GHz SRF cavities are being used for a dark photon search at the vertical test stand (VTS) in FNAL, for the second phase of the Dark SRF experiment. During testing at 2 K the cavities experience frequency detuning caused by microphonics and sl
Externí odkaz:
http://arxiv.org/abs/2307.10433
Autor:
Contreras-Martinez, C., Giaccone, B., Gonin, I., Khabiboulline, T., Melnychuk, O., Pischalnikov, Y., Posen, S., Pronitchev, O., Yun, JC.
At FNAL two single cell 2.6 GHz SRF cavities are being used to search for dark photons, the experiment can be conducted at 2 K or in a dilution refrigerator. Precise frequency tuning is required for these two cavities so they can be matched in freque
Externí odkaz:
http://arxiv.org/abs/2307.10424
We present the results of commissioning a dedicated furnace for Nb3Sn coatings of 2.6 GHz single cell cavities. Nb3Sn is a desired coating due to its high critical temperature and smaller surface resistance compared to bulk Nb. Usage of Nb3Sn coated
Externí odkaz:
http://arxiv.org/abs/2307.08844
Autor:
Petersen, T. B., Kelly, M. P., Reid, T., Kedzie, M., Guilfoyle, B., Chen, G., Posen, S., Tennis, B., Eremeev, G.
A 218 MHz quarter wave niobium cavity has been fabricated for the purpose of demonstrating Nb3Sn technology on a low-beta accelerator cavity. Niobiumtin has been established as a promising next generation SRF material, but development has focused pri
Externí odkaz:
http://arxiv.org/abs/2307.08783
Autor:
Eremeev, G., Pudasaini, U., Cheban, S., Fischer, J., Forehand, D., Posen, S., Reilly, A., Rimmer, R., Tennis, B.
Two CEBAF 5-cell accelerator cavities have been coated with Nb3Sn film using the vapor diffusion technique. One cavity was coated in the Jefferson Lab Nb3Sn cavity coating system, and the other in the Fermilab Nb3Sn coating system. Both cavities were
Externí odkaz:
http://arxiv.org/abs/2307.10268
Autor:
Belomestnykh, S., Bhat, P. C., Grassellino, A., Kazakov, S., Padamsee, H., Posen, S., Romanenko, A., Shiltsev, V., Valishev, A., Yakovlev, V.
Traveling wave SRF accelerating structures offer several advantages over the traditional standing wave structures: substantially lower $H_pk/E_acc$ and lower $E_pk/E_acc$, ratios of peak magnetic field and peak electric field to the accelerating grad
Externí odkaz:
http://arxiv.org/abs/2307.06248
Autor:
Cravatta, A., Arkan, T., Bafia, D., Kaluzny, J., Posen, S., Vennekate, J., Drury, M., Aderhold, S., Checchin, M., Gonnella, D., Hogan, J., Maniscalco, J., Nelson, J., Porter, R., Zacarias, L.
Multipacting (MP) is a phenomenon which can affect stability in particle accelerators and limit performance in superconducting radio frequency cavities. In the TESLA shaped, 1.3 GHz, 9-cell cavities used in the LCLS-II (L2) and LCLS-II-HE (HE) projec
Externí odkaz:
http://arxiv.org/abs/2306.17274