SPS and CNGS

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2019-08-15
09:16

Beam-based alignment of the SuperKEKB linac quadrupoles / Ogur, S (Bogazici U. ; CERN) ; Iida, N (KEK, Tsukuba) ; Kamitani, T (KEK, Tsukuba) ; Oide, K (CERN ; KEK, Tsukuba) ; Zimmermann, F (CERN)
The positron linac of SuperKEKB contains accelerating structures surrounded by quadrupoles without nearby beam-position-monitors (BPMs) or steering magnets. In this situation, standard techniques for beam steering or beam-based-alignment are not efficient. [...]
2019 - 13 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 925 (2019) 199-211

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2019-08-15
09:16

Exploration of Two Layer Nb$_3$Sn Designs of the Future Circular Collider Main Quadrupoles / Lorin, Clement (Saclay) ; Fleiter, Jerome (CERN) ; Salmi, Tiina (Tampere U. of Tech.) ; Schoerling, Daniel (CERN)
The goal of this study is to propose an alternative FCC quadrupole design where the risk from both their fabrication and their operation in the machine is reduced compared to previous analysis. Therefore, the number of coil layers has been reduced from four to two and the load-line margin has been increased from 14% to 20% compared to previous investigations (“Design of a Nb3Sn 400 T/m quadrupole for the future circular collider,” IEEE Trans. [...]
2019 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 29 (2019) 4001005

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2019-08-13
13:22

Beam position monitors for antiprotons / Bossart, Rudolf
CERN-SPS-ABM-RB-Report-78-8. - 1978. - 44 p.
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2019-08-13
06:53

Magnetic Analysis of the MQXF Quadrupole for the High Luminosity LHC / Izquierdo Bermudez, S (CERN ; Madrid Politecnic U., ETSI Minas) ; Fiscarelli, Lucio (CERN) ; Ambrosio, Giorgio (Fermilab) ; Bajas, Hugues (CERN) ; Chlachidze, Guram (Fermilab) ; Ferracin, Paolo (CERN) ; DiMarco, Joseph (Fermilab) ; Stoynev, Stoyan Emilov (Fermilab) ; Todesco, Ezio (CERN) ; Sabbi, GianLuca (LBL, Berkeley) et al. /LARP
The high-luminosity upgrade of the large hadron collider (HL-LHC) requires new high-field and large-aperture quadrupole magnets for the low-beta inner triplets (MQXF). The US Hilumi-LHC Accelerator Upgrade (HL-LHC AUP) and CERN are jointly developing a 150 mm aperture Nb3Sn magnet. [...]
FERMILAB-PUB-19-054.- 2019 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 29 (2019) 4901705 Fulltext: PDF; External link: FERMILABPUB
In : Applied Superconductivity Conference 2018, Seattle, United States Of America, 28 Oct - 2 Nov 2018, pp.4901705

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2019-07-25
06:05

The Seismic Angular Noise of an Industrial Origin Measured by the Precision Laser Inclinometer in the LHC Location Area / Azaryan, N (Dubna, JINR) ; Budagov, J (Dubna, JINR) ; Glagolev, V (Dubna, JINR) ; Lyablin, M (Dubna, JINR) ; Pluzhnikov, A (Dubna, JINR) ; Seletsky, A (Dubna, JINR) ; Trubnikov, G (Dubna, JINR) ; Di Girolamo, B (CERN) ; Gayde, J C (CERN) ; Mergelkuhl, D (CERN)
The decreasing of the relaxation time for recovery of the horizontality of the surface of thin layer of the liquid in the cuvette is a new observed phenomenon caused by the meniscus influence in case of the cuvette small inclination. It was experimentally established that the time of reconstruction of the surface of 4 mm thick liquid layer in the cuvette of ∅5 mm at 0.5 µrad of calibration inclining is 0.082 ± 0.006 s. [...]
2019 - 11 p. - Published in : Phys. Part. Nucl. Lett. 16 (2019) 343-353

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2019-07-24
06:03

Simulation of hydrodynamic tunneling induced by high-energy proton beam in copper by coupling computer codes / Nie, Y (CERN) ; Fichera, C (CERN) ; Mettler, L (CERN) ; Carra, F (CERN) ; Schmidt, R (CERN) ; Tahir, N A (Darmstadt, GSI) ; Bertarelli, A (CERN) ; Wollmann, D (CERN)
The design of machine protection systems for high-energy accelerators with high-intensity beams requires analyzing a large number of failures leading to beam loss. One of the most serious failures is an accidental impact of a large number of bunches at one location, for example, due to a deflection of the particle beams by the extraction kicker magnets with the wrong strength. [...]
2019 - 16 p. - Published in : Phys. Rev. Accel. Beams 22 (2019) 014501 Fulltext from Publisher: PDF;

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2019-07-24
06:03

Experiment exposing refractory metals to impacts of 440 GeV$/c$ proton beams for the future design of the CERN antiproton production target: Experiment design and online results / Torregrosa Martin, Claudio (CERN ; Valencia, Polytechnic U.) ; Perillo-Marcone, Antonio (CERN) ; Calviani, Marco (CERN) ; Gentini, Luca (CERN) ; Butcher, Mark (CERN) ; Muñoz-Cobo, José-Luis (Valencia, Polytechnic U.)
The HRMT27-RodTarg experiment employed the HiRadMat facility at CERN to impact intense 440 GeV proton beams onto thin rods 8 mm in diameter, 140 mm in length, and made of high-density materials such as Ir, W, Ta, Mo, and alloys. The purpose of the experiment was to reduce uncertainties on the CERN antiproton target material response and assess the material selection for its future redesign. [...]
2019 - 16 p. - Published in : Phys. Rev. Accel. Beams 22 (2019) 013401 Fulltext from Publisher: PDF;

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2019-07-17
12:06

Numerical and experimental studies to model and reduce the impedance in the CERN Super Proton Synchrotron (SPS) / Beck, Mario
Intensity-driven beam instabilities are studied in simulations with a refined impedance model and in experimental measurements for this thesis [...]
CERN-THESIS-2018-433 - 181 p.

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2019-07-17
09:29