CERN Accelerating science

SPS and CNGS

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2017-08-11
13:55
MODELLING SLOW EXTRACTION INDUCED RADIOACTIVITY IN SPS LSS2 / Araujo Martinez, Aurora Cecilia ; Fraser, Matthew Alexander (CERN)
The Accelerator and Beam Transfer (ABT) group is investigating the impact of recent proposals to extract higher proton intensities to Fixed Target experiments at the SPS [...]
CERN-STUDENTS-Note-2017-035.
- 2017.
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2017-08-03
06:01
Characterization of 41Ar production in air at a PET cyclotron facility / Cicoria, Gianfranco (Unlisted, IT) ; Cesarini, Francesco (Unlisted, IT) ; Infantino, Angelo (CERN) ; Vichi, Sara (Bologna U.) ; Zagni, Federico (Unlisted, IT) ; Marengo, Mario (Unlisted, IT)
In the production of Positron Emission Tomography (PET) nuclides at a medical cyclotron facility 41Ar (T1/2 = 109.34 m) is produced by the activation of air due to the neutron flux, according to the 40Ar(n, γ)41Ar reaction. In this work, we describe a relatively inexpensive and readily reproducible methodology of air sampling that can be used for quantification of 41Ar during the routine production of PET nuclides. [...]
2017 - 14 p. - Published in : Mod. Phys. Lett. A 32 (2017) 1740014

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2017-07-28
06:17
Shape-memory alloy rings as tight couplers between ultrahigh-vacuum pipes: Design and experimental assessment / Niccoli, Fabrizio (CERN) ; Garion, Cedric (CERN) ; Maletta, Carmine (CERN) ; Chiggiato, Paolo (CERN)
The ultrahigh-vacuum (UHV) coupling performance of NiTiNb shape memory alloy (SMA) rings was investigated by finite element (FE) simulations and experimental measurements. The contact pressure at the interface between the SMA ring and the vacuum pipe was measured and good agreements with the FE results were obtained. [...]
2017 - 12 p. - Published in : J. Vac. Sci. Technol. A A 35 (2017) 031601

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2017-07-28
06:17
Design of ERMC and RMM, the Base of the $Nb_3Sn$ 16 T Magnet Development at CERN / Izquierdo Bermudez, Susana (CERN) ; Ortwein, Rafal (CERN) ; Perez, Juan Carlos (CERN) ; Rochepault, Etienne (CERN)
High-field superconducting accelerator magnets are a key technology of the future circular collider. In order to master the technical challenges and achieve the performance targets, CERN has launched a technology development program. [...]
2017 - 4 p. - Published in : IEEE Trans. Appl. Supercond. 27 (2017) 4002004
In : Applied Superconductivity Conference, Denver, CO, USA, 4 - 9 Sep 2016, pp.4002004

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2017-07-28
06:17
The crab cavities cryomodule for SPS test / Zanoni, C (CERN) ; Amorim Carvalho, A (CERN) ; Artoos, K (CERN) ; Atieh, S (CERN) ; Brodzinski, K (CERN) ; Calaga, R (CERN) ; Capatina, O (CERN) ; Capelli, T (CERN) ; Carra, F (CERN) ; Dassa, L (CERN) et al.
RF Crab Cavities are an essential part of the HL-LHC upgrade. Two concepts of such systems are being developed: the Double Quarter Wave (DQW) and the RF Dipole (RFD). [...]
2017 - 7 p. - Published in : J. Phys. : Conf. Ser. 874 (2017) 012092

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2017-07-28
06:17
Possibilities for transverse feedback phase adjustment by means of digital filters / Kotzian, G (CERN)
In transverse feedback systems a phase adjustment is generally required to convert a beam position signal from a pick-up into a momentum correction signal used by a transverse kicker. In this paper we outline several possibilities for phase adjustments using only single pickups or the vector combination of two pick-ups. [...]
2017 - 6 p. - Published in : J. Phys. : Conf. Ser. 874 (2017) 012089

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2017-07-28
06:17
Studies and observations of beam dynamics near a sum resonance / Franchetti, G (Darmstadt, GSI) ; Gilardoni, S (CERN) ; Huschauer, A (CERN) ; Schmidt, F (CERN) ; Wasef, R (CERN)
The effect of space charge on bunches stored for long term in a synchrotron can be severe for beam survival. This may be the case in projects as SIS100 at GSI or LIU at CERN. [...]
2017 - 9 p. - Published in : J. Phys. : Conf. Ser. 874 (2017) 012075

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2017-07-28
06:17
Characterization of resonant impedances of CERN-SPS gate valves / Kaltenbacher, Thomas (CERN) ; Repond, Joel (CERN) ; Vollinger, Christine (CERN)
For the CERN High Luminosity LHC project, a doubling of bunch intensity is foreseen. However, this intensity increase is currently limited by the LHC injector chain, in part due to longitudinal multi-bunch instabilities in the SPS. [...]
2017 - 7 p. - Published in : J. Phys. : Conf. Ser. 874 (2017) 012073

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2017-07-28
06:17
Controlled longitudinal emittance blow-up using band-limited phase noise in CERN PSB / Quartullo, D (CERN ; U. Rome La Sapienza (main)) ; Shaposhnikova, E (CERN) ; Timko, H (CERN)
Controlled longitudinal emittance blow-up (from 1 eVs to 1.4 eVs) for LHC beams in the CERN PS Booster is currently achievied using sinusoidal phase modulation of a dedicated high-harmonic RF system. In 2021, after the LHC injectors upgrade, 3 eVs should be extracted to the PS. [...]
2017 - 7 p. - Published in : J. Phys. : Conf. Ser. 874 (2017) 012066

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2017-07-27
06:48
The beam lines design for the CERN neutrino platform in the CERN north area and an outlook on their expected performance / Charitonidis, N (CERN) ; Brugger, M (CERN) ; Efthymiopoulos, I (CERN) ; Gatignon, L (CERN) ; Karyotakis, Y (Annecy, LAPP) ; Sala, P R (CERN ; INFN, Italy) ; Nowak, E (CERN ; AGH-UST, Cracow) ; Ortega-Ruiz, I (CERN ; Ecole Polytechnique, Lausanne)
In the framework of the CERN Neutrino Platform project, extensions to the existing SPS North Area secondary beam lines “H2” and “H4”, able to provide low-energy charged particles in the momentum range from 0.4 to 12 GeV/c, have been designed. The parameters of these “very low energy” beam lines, the expected beam composition as seen by the experiments as well as an outlook on their expected performance are summarized in this paper. [...]
2017 - 6 p. - Published in : J. Phys. : Conf. Ser. 874 (2017) 012056

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