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PBC Notes

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2019-04-16
12:51
Physics opportunities for a fixed-target programme in the ALICE experiment / Galluccio, Francesca (Universita e sezione INFN di Napoli (IT)) ; Hadjidakis, Cynthia (Centre National de la Recherche Scientifique (FR)) ; Kurepin, Alexander (Institute for Nuclear Research, Moscow) ; Massacrier, Laure (Centre National de la Recherche Scientifique (FR)) ; Porteboeuf, S (Centre national de la recherche scientifique (FR)) ; Pressard, Kevin (Centre national de la recherche scientifique (FR)) ; Scandale, Walter (CERN) ; Topilskaya, Natalia (Institute for Nuclear Research, Moscow) ; Trzeciak, Barbara (Utrecht University) ; Uras, Antonio (Centre national de la recherche scientifique (FR)) et al.
A fixed-target programme in the ALICE experiment using the LHC proton and lead beams offers many physics opportunities related to the parton content of the nucleon and nucleus at high-$x$, the nucleon spin and the Quark-Gluon Plasma. We investigate two solutions that would allow ALICE to run in a fixed-target mode: the internal solid target coupled to a bent crystal and the internal gas target. [...]
CERN-PBC-Notes-2019-004.- Geneva : CERN, 2019 - Published in : link to original file in ESPP strategy update PDF document submitted to ESPP strategy update: PDF;

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2019-03-14
08:31
VELO with SMOG2 Impedance-based Heating Localization Analysis / Popovic, Branko Kosta (CERN)
In connection to the proposed upgrade (SMOG2) of the existing gas injection system for the LHCb experiment (SMOG), the potential heating due to induced longitudinal beam impedance of the VELO with the SMOG2 is investigated. The analysis looks at heating of the individual components of the object in the open position, especially potential heating of the SMOG2 cell. [...]
CERN-PBC-Notes-2019-003.- Geneva : CERN, 2019

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2019-02-13
15:58
Note on the Efficiency of Differential Pumping in the LHC Polarized Gas Target (PGT) / Steffens, Erhard (University of Erlangen)
For a sufficient density of a window-less gas target based on a storage cell, a substantial gas flow rate is required, exceeding that of UHV vacuum systems. Therefore, differential pumping has to be applied in order to limit the gas flow into neighbouring sections. [...]
CERN-PBC-Notes-2019-002.- Geneva : CERN, 2019 Fulltext: PDF;

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2019-02-08
15:08
Study of beam-gas interaction at the LHC for the Physics Beyond Collider Fixed-Target study / Boscolo Meneguolo, Caterina (Universita e INFN, Padova (IT)) ; Bruce, Roderik (CERN) ; Cerutti, Francesco (CERN) ; Ferro-Luzzi, Massimiliano (CERN) ; Mereghetti, Alessio (CERN) ; Molson, James (CERN) ; Redaelli, Stefano (CERN) ; Abramov, Andrey (University of London (GB))
Among several working groups formed in the framework of Physics Beyond Colliders study, launched at CERN in September 2016, there is one investigating some specific fixed-target experiment proposals. Of particular interest is the study of a high-density unpolarized or polarized gas target to be installed upstream the LHCb detector using storage cells to enhance the target density. [...]
CERN-PBC-Notes-2019-001.- Geneva : CERN, 2019 beamgas note v2019-04-18: PDF;

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2018-12-14
14:45
Calculation of the allowed aperture for a gas storage cell in IP8 / Boscolo Meneguolo, Caterina (CERN) ; Bruce, Roderik (CERN) ; Ferro-Luzzi, Massimiliano (CERN) ; Giovannozzi, Massimo (CERN) ; Redaelli, Stefano (CERN)
In the framework of the Physics Beyond Collider studies, a working group was created in order to study some specific proposals to perform fixed-target physics experiments at the Large Hadron Collider. Among these proposals, the possibility has been described of installing an internal gas target, injecting unpolarized or polarized gas inside a storage cell (SC) located around the beam, close to the LHCb detector. [...]
CERN-PBC-Notes-2018-008.- Geneva : CERN, 2018 Main document PDF file for CERN-PBC-Notes-2018-008: PDF;

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2018-12-14
11:58
The SMOG2 project / Di Nezza, Pasquale (INFN Frascati) ; Carassiti, Vittore (Universita e INFN, Ferrara (IT)) ; Ciullo, Giuseppe (Universita e INFN, Ferrara (IT)) ; Lenisa, Paolo (Universita e INFN, Ferrara (IT)) ; Pappalardo, Luciano Libero (Universita e INFN, Ferrara (IT)) ; Steffens, Erhard (University of Erlangen (Germany)) ; Bruce, Roderik (CERN) ; Vasilyev, Alexander (Petersburg Nuclear Physics Institute, Gatchina (Russia)) ; Boscolo Meneguolo, Caterina (Universita e INFN, Padova (IT)) ; Bregliozzi, Giuseppe (CERN) et al.
"A proposal for an upgraded version of the existing gas injection system for the LHCb experiment (SMOG) is presented. The core idea of the project, called SMOG2, is the use of a storage cell for the injected gas to be installed upstream of the VELO detector [...]
CERN-PBC-Notes-2018-007.- Geneva : CERN, 2018 Fulltext: PDF;

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2018-12-06
15:27
The report of the Conventional Beams Working Group to the Physics Beyond Collider Study and to the European Strategy for Particle Physics / Gatignon, Lau (CERN)
This document summarises the main conclusions of the Conventional Beams Working group, which has analysed the beam related and technical requirements and requests in the proposals to the Physics Beyond Colliders study for the North Area at the CERN SPS. We present results from studies on feasibility, requirements, compatibility between proposals and, where possible, the order of magnitude of the costs. [...]
CERN-PBC-Notes-2018-005.- Geneva : CERN, 2018 Fulltext: PDF;

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2018-12-05
17:48
REDTOP DISCUSSIONS IN THE CONVENTIONAL BEAMS WORKING GROUP / Gatignon, Lau (CERN)
In an EN-EA internal meeting of the Conventional Beams WG on February 19th Reyes Alemany Fernandez presented a preliminary study (together with Brennan Goddard) on possibilities for REDTOP at LEIR. The slides are attached. [...]
CERN-PBC-Notes-2018-004.- Geneva : CERN, 2018 - 3. Fulltext: DOCX;

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2018-11-30
12:20
STUDIES FOR FUTURE FIXED-TARGET EXPERIMENTS AT THE LHC IN THE FRAMEWORK OF THE CERN PHYSICS BEYOND COLLIDERS STUDY
A study on prospects for Physics Beyond Colliders at CERN was launched in September 2016 to assess the capabilities of the existing accelerators complex. Among several other working groups, this initiative triggered the creation of a working group with the scope of studying a few specific proposals to perform fixed-target physics experiments at the Large Hadron Collider (LHC). [...]
CERN-PBC-Notes-2018-003.- Geneva : CERN, 2018 - 4. - Published in : Fulltext: PDF;

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2018-10-12
14:30
Target studies for the proposed KLEVER experiment / Van Dijk, Maarten (CERN) ; Rosenthal, Marcel (CERN)
The KLEVER experiment is being proposed to measure the branching ratio 𝐾 𝐿 π 0 𝜈𝜈̅ at the K12 beamline at the CERN SPS. This study presents considerations for the target required for such an experiment, specifically the production angle, target length and material. [...]
CERN-PBC-Notes-2018-002.- Geneva : CERN, 2018 - 28. Fulltext: DOCX;

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