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2023-03-25
06:30
A Novel Design for Improving the Control on the Stainless-Steel Vessel Welding Process for Superconducting Magnets / Vallone, G (LBL, Berkeley) ; Ambrosio, G (Fermilab) ; Anderssen, E (LBL, Berkeley) ; Fehrer, S (Fermilab) ; Ferracin, P (LBL, Berkeley) ; Ferradas Troitino, J (CERN)
Stainless steel vessels see widespread use in superconducting magnets for particle accelerator applications. [...]
FERMILAB-PUB-22-858-TD. - 2022. - 5 p.
Fermilab Library Server - Fulltext

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2023-03-25
06:30
Recent advances and perspectives of the high precision laser metrology / Batusov, V (Dubna, JINR) ; Budagov, J (Dubna, JINR) ; Glagolev, V (Dubna, JINR) ; Lyablin, M (Dubna, JINR) ; Shirkov, G (Dubna, JINR) ; Gayde, J Ch (CERN) ; Di Girolamo, B (CERN) ; Mainaud Durand, H (CERN) ; Mergelkuhl, D (CERN) ; Nessi, M (CERN) et al.
The laser-based metrology presents new means and opens possibilities in solving tasks where achievement of a high precision survey is of the principal signiˇcance necessity. The extended laser ˇducial line (coordinate axis) is necessary for precision alignment of basic structure units of large-scale accelerators, for precision assembly of subdetectors when mounting large spectrometric complexes, for online control of space stability of particle detectors during the data taking period. The high sensitivity laser inclinometers open the new possibilities for ground motion control and for accelerator (collider) beam space stabilization essential for achievement of stable high intensity (luminosity) at the interaction area. The investigation has been performed at the Dzhelepov Laboratory of Nuclear Problems, JINR..
E13-2014-21. - 2014. - 17 p.
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2023-03-25
06:30
Status of the MQXFB Nb$_3$Sn quadrupoles for the HL-LHC / Izquierdo Bermudez, Susana (CERN) ; Ambrosio, Giorgio (Fermilab) ; Apollinari, Giorgio (Fermilab) ; Ballarino, Amalia (CERN) ; Barth, Christian (CERN) ; Crouvizier, Mickael Denis (CERN) ; Duarte Ramos, Delio (CERN) ; Devred, Arnaud (CERN) ; Feher, Sandor (Fermilab) ; Felice, Helene (CERN) et al.
The cold powering test of the first two prototypes of the MQXFB quadrupoles (MQXFBP1, now disassembled, and MQXFBP2), the Nb3Sn inner triplet magnets to be installed in the HL-LHC, has validated many features of the design, such as field quality and quench protection, but has found performance limitations. [...]
FERMILAB-PUB-22-860-TD. - 2022. - 9 p.
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2023-03-25
04:21
N-doped surfaces of superconducting niobium cavities as a disordered composite-addendum / Weingarten, Wolfgang (CERN)
Experimental data on N-doped superconducting (sc) cavities are further analyzed which contribute to confirm a recently proposed model explaining the increase of the Q-value versus the accelerating gradient..
arXiv:2207.11573. - 4 p.
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2023-03-25
04:21
Longitudinally strong focusing lattice for Compton--ring gamma sources / Bulyak, Eugene (Kharkov, KIPT) ; Rinolfi, Louis (CERN) ; Urakawa, Junji (KEK, Tsukuba)
Electron storage rings of GeV energy with laser pulse stacking cavities are promising intense sources of polarised hard photons which, via pair production, can be used to generate polarised positron beams. [...]
arXiv:2207.03857. - 5 p.
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2023-03-25
04:21
The Big Bang could be anisotropic. The case of Bianchi I model / Parnovsky, S.L. (CERN ; Taras Shevchenko U.)
We consider an evolution of anisotropic cosmological model on the example of the Bianchi type I homogeneous universe. [...]
arXiv:2211.05664. - 15 p.
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2023-03-25
04:20
Characterization of the effect of plastic gas pipes with the use of a Single Wire Proportional Chamber / Guida, Roberto (CERN) ; Mandelli, Beatrice (CERN) ; Corbetta, Mara (CERN) ; Mari, Tomoo (CERN)
Plastic gas pipes are widely used in experimental setups for gaseous detectors, due to their flexibility and easiness of use. [...]
arXiv:2202.12007. - 4 p.
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2023-03-25
04:20
Development of a Virtual EM Detector for the Advanced Particle Accelerator Modeling Code WarpX / Rheaume, Elisa (Cal State, Long Beach ; LBNL, Berkeley) ; Giacomel, Lorenzo (CERN) ; Vay, Jean-Luc (LBNL, Berkeley) ; Huebl, Axel (LBNL, Berkeley)
In physics research particle accelerators are highly valued, and extraordinarily expensive, technical instruments. [...]
arXiv:2201.08469. - 9 p.
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2023-03-25
04:20
Gaia Data Release 3: Chemical cartography of the Milky Way / Gaia Collaboration
Gaia DR3 opens a new era of all-sky spectral analysis of stellar populations thanks to the nearly 5.6 million stars observed by the RVS and parametrised by the GSP-spec module. [...]
arXiv:2206.05534. - 49 p.
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2023-03-25
04:19
Review of coupled betatron motion parametrizations and applications to strongly coupled lattices / Vanwelde, Marion (U. Brussels (main)) ; Hernalsteens, Cédric (CERN ; U. Brussels (main)) ; Bogacz, S. Alex (Jefferson Lab) ; Machida, Shinji (Rutherford) ; Pauly, Nicolas (U. Brussels (main))
The coupling of transverse motion is a natural occurrence in particle accelerators, either in the form of a residual coupling arising from imperfections or originating by design from strong systematic coupling fields. [...]
arXiv:2210.11866. - 33 p.
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