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2024-12-02
11:36
Ideas for a slow extraction via SPS LSS4 or LSS6 to a future PBC-SBN beamline / Jebramcik, Marc Andre (CERN) ; Arrutia, Pablo (CERN) ; Charitonidis, Nikolaos (CERN)
Within the scope of the Physics Beyond Colliders (PBC) framework and its Conventional Beams Working Group (CBWG), a study for a future Short-Baseline Neutrino Beamline (SBN) at CERN is ongoing. In this context, a preliminary conceptual feasibility analysis of different options of placing the beamline at the PS or the SPS has been carried out. [...]
CERN-PBC-Notes-2024-006.- Geneva : CERN, 2024 - 16.

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2024-11-13
09:35
710 kW stable average-power in a 45,000 finesse two-mirror optical cavity / Lu, Xin-Yi (Tsinghua University) ; Martens, Aurelien (Université Paris-Saclay (FR))
Very-high average optical enhancement cavities are be- ing used both in fundamental and applied research. The most demanding applications require stable megawatt level average power of infrared picosecond pulses with repetition rates of several tens of MHz. [...]
CERN-PBC-Notes-2024-005.- Geneva : CERN, 2024 - 4. Fulltext: PDF;

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2024-09-15
20:29
NuTag: A proof-of-concept study for a long-baseline neutrino beam / Baratto Roldan, Anna (CERN) ; Perrin-Terrin, Mathieu (Centre National de la Recherche Scientifique (FR)) ; Parozzi, Elisabetta Giulia (Universita & INFN, Milano-Bicocca (IT)) ; Jebramcik, Marc Andre (CERN) ; Charitonidis, Nikolaos (CERN)
The study of neutrino oscillation at accelerators is limited by systematic uncertainties, in particular on the neutrino flux, cross section, and energy estimates. These systematic uncertainties could be eliminated by a novel experimental technique: neutrino tagging. [...]
CERN-PBC-Notes-2024-004.- Geneva : CERN, 2024

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2024-08-21
17:49
SPS Fast Spill Monitor Characterisation and Evaluation Throughout 2023 / Benitez Berrocal, Sara (CERN) ; Belohrad, David (CERN) ; Burger, Stephane (CERN) ; Goldblatt, Aurelie Noelle (CERN) ; Martin Nieto, Miguel (CERN) ; Mazzoni, Stefano (CERN) ; Roncarolo, Federico (CERN)
Monitoring the intensity of protons extracted from the CERN Super Proton Synchrotron )SPS) ring towards the North Area (NA) facility at a high rate is of utmost importance, with increasing challenges, for the the current facility operation, the ongoing NA consolidation, and the future Physics Beyond Colliders (PBC) projects. Various instruments are being developed to measure beam current fluctuations across a broad range of frequencies, from a few hundred Hz to several hundred MHz. [...]
CERN-PBC-Notes-2024-005.- Geneva : CERN, 2023 - 14. Fulltext: PDF;

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2024-07-11
15:00
Update of Facility Technical Studies for the FPF / Boyd, Jamie (CERN) ; Gamba, Davide (CERN) ; Osborne, John Andrew (CERN) ; Bud, Tamara Alice (CERN) ; Balazs, Kincso (CERN) ; Corso, Jean-Pierre (CERN) ; Magazinik, Anastasiya (Tampere University of Technology (FI)) ; Navascues Cornago, Angel (CERN)
The Forward Physics Facility (FPF) has been proposed to house a set of detectors to study collider neutrinos and search for new particles in the High-Luminosity LHC era. This report provides an update to the space and infrastructure requirements of the Facility, a result of integration studies carried out by CERN technical teams in conjunction with the FPF experimental community. [...]
CERN-PBC-Notes-2024-004.- Geneva : CERN, 2024 - 23. Fulltext: PDF;

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2024-06-19
16:59
Impact of Vibration to HL-LHC Performance During the FPF Facility Construction / Gamba, Davide (CERN) ; Bartosik, Hannes (CERN) ; Guinchard, Michael (CERN) ; Osborne, John Andrew (CERN) ; Balazs, Kincso (CERN) ; Vendeuvre, Camille (CERN) ; Wenninger, Jorg (CERN) ; Widuch, Kacper (CERN)
The Forward Physics Facility (FPF) is a proposed experimental site intended to be positioned several hundred meters downstream from the ATLAS interaction point. It aims to capture long- lived particles and neutrinos that travel along the beam collision axis and fall outside the ATLAS detector’s range. [...]
CERN-PBC-Notes-2024-003.- Geneva : CERN, 2024 - 18. Fulltext: PDF;

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2024-04-18
22:05
Stable 500 kW average power of infrared light in a finesse 35,000 enhancement cavity / Lu, Xin-Yi (Tsinghua University)
Advances in laser technology over the past 25 years have been impressive, in particular for the Ytterbium technology where nowadays kW-class laser systems are available. This technology also led to the possibility to provide hundreds of kilowatts of laser power by the use of enhancement cavities. [...]
CERN-PBC-Notes-2024-001.- Geneva : CERN, 2024 - 6. Fulltext: PDF;

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2023-11-28
11:19
Systematic Errors of a ”frozen Spin” EDM measurement with electric and magnetic Fields due to imperfect Alignment of Fields / Cilento, Vera (CERN) ; Carli, Christian (CERN) ; Haj Tahar, Malek (CERN)
Many of the rings proposed to measure the Electric Dipole Moment (EDM) of charged particles rely on a combination of magnetic and electric fields bending the beam to fulfil the ”frozen spin” condition. Imperfect alignment of the two fields bending the beam is known to rotate the spin from the longitudinal into the vertical direction. [...]
CERN-PBC-Notes-2023-009.- Geneva : CERN, 28 - 15. Fulltext: PDF;

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2023-10-05
17:08
Possible operational scenarios for a quasi-simultaneous operation of proton and ion beams in the North Area Experimental Areas / Charitonidis, Nikolaos (CERN) ; Banerjee, Dipanwita (CERN) ; Bernhard, Johannes (CERN) ; Van Dijk, Maarten (CERN) ; Nevay, Laurence James (CERN) ; Gatignon, Lau (Lancaster University (GB))
The implications of the experimental proposals for ion operation in the North Area post-LS3 are being studied within the framework of the Physics Beyond Colliders framework in collaboration with an ATS Future Ions Working Group established with the mandate to study possibilities and limitations of the CERN injector complex for delivering ions to the SPS experimental areas and the LHC post-LS3. This document describes three conceptual scenarios for "quasi-simultaneous" operation of protons and ions slowly extracted towards the North Area beam lines as a possible mean to optimize the overall beam delivery to the NA experiments. [...]
CERN-PBC-Notes-2023-008.- Geneva : CERN, 2023 - 6. CERN-PBC-NOTE-2023-008: PDF;

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2023-08-29
15:58
Laser beam transport and stabilization considerations for the Gamma Factory proof-of-principle experiment / Granados, Eduardo (CERN) ; Dutheil, Yann (CERN) ; Marsh, Bruce (CERN) ; Arduini, Gianluigi (CERN)
The Gamma Factory proof-of-principle (GF PoP) experiment consists in colliding high intensity ultrafast laser pulses with ultra-relativistic partially stripped ion beams at the CERN Super Proton Synchrotron (SPS). The experiment represents the first demonstration of fast cooling of ultra- relativistic ion beams and high flux gamma ray production [...]
CERN-PBC-Notes-2023-007.- Geneva : CERN, 2023 - 19. Fulltext: PDF;

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