The PIP-II Conceptual Design Report

Ball, M.J.; Burov, A.; Chase, Brian; Chakravarty, Anindya; Chen, A.; Dixon, Stephen; Edelen, Jonathan; Johnson, Dean; Holmes, Stephen D.; Kazakov, S.; Klebaner, Arkadiy; Kourbanis, I.; Leveling, A.; Melnychuk, Oleksandr; Neuffer, D.; Nicol, T.; Ostiguy, J.‐F.; Pasquinelli, Ralph J.; Passarelli, Donato; Ristori, L.; Pellico, W.; Patrick, J.; Prost, L.; Rakhno, I.; Saini, A.; Schappert, W.; Shemyakin, Alexander; Steimel, J.; Scarpine, V.; Vivoli, A.; Warner, Andrew; Yakovlev, V. I.; Ostroumov, P. N.; Conway, Zachary

doi:10.2172/1346823

Cited by 23 publications

(21 citation statements)

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“…In recent years, R&D on SRF cavities has been focused on 1.3 GHz TESLA-type cavities [8] primarily because of the interest in realizing many superconducting linear accelerators (LINACs), such as the European Free Electron Laser (EXFEL), Linear Coherent Light Source II (LCLS-II), and International Linear Collider (ILC) [9][10][11]. However, superconducting accelerating cavities operating at different frequencies are of high interest as well for machines such as the Proton Improvement Plan II (PIP-II), U.S. and the European Spallation Neutron Sources (SNS and ESS), and Facility for Rare Isotope Beams (FRIB) [12][13][14]. In addition, high-frequency superconducting cavities may be employed in quantum information, astrophysics, and gravitational-wave-detection applications [15][16][17][18].…”

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confidence: 99%

Field-Enhanced Superconductivity in High-Frequency Niobium Accelerating Cavities

et al. 2018

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The discovery of nitrogen-doping treatment revealed that the radio frequency surface resistance of niobium resonators may be significantly reduced when nitrogen impurities are dissolved as interstitials in the material. A peculiar behavior exhibited by N-doped cavities is the anti-Q slope, i.e., a reduction in the temperature-dependent component of the surface resistance as a function of the accelerating field. This unusual trend in the surface resistance behavior has been attributed to the presence of interstitial nitrogen in the niobium lattice after the doping treatment. This Letter presents a focused study on the field dependence of the temperature-dependent component of the surface resistance as a function of the cavity resonant frequency. The findings show that the anti-Q slope may appear even in clean niobium cavities if the resonant frequency is high enough, which suggests new routes toward understanding the anti-Q slope effect.

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Field-Enhanced Superconductivity in High-Frequency Niobium Accelerating Cavities

et al. 2018

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“…Fermilab's PIP-II could provide an 800 MeV beam with an appropriate time structure; an advantage of 800 MeV protons is that they are far below the threshold for antiproton production and that uncertain background disappears. Neuffer [42] is a sample beam delivery scheme and the PIP-II project is summarized in Ball et al [43].…”

Section: Mu2e Upgradesmentioning

confidence: 99%

The Mu2e Experiment

Bernstein

2019

Front. Phys.

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The Mu2e experiment will search for the charged-lepton flavor violating (CLFV) neutrino-less conversion of a negative muon into an electron in the field of a nucleus. The conversion process results in a monochromatic electron with an energy of 104.97 MeV, slightly below the muon rest mass. The goal of the experiment is to improve the previous upper limit by four orders of magnitude and reach a SES (single event sensitivity) of 3 × 10 −17 on the conversion rate, a 90% CL of 8 × 10 −17 , and a 5σ discovery reach at 2 × 10 −16 . The experiment will use a intense pulsed negative muon beam. The pulsed beam is essential to reducing backgrounds. The other essential element is a sophisticated magnetic system composed of three consecutive solenoids that form the muon beam. Mu2e will use an aluminum target and examine ∼ 10 18 stopped muons in 3 years of running. The Mu2e experiment is under design and construction at the Fermilab Muon Campus. The experiment will begin operations in 2022, and will require about 3 years of data-taking. Upgrades to other materials than aluminum are already being planned. This article is written specifically for younger researchers to bridge the gap between conference presentations and detailed design reports, and examines issues not covered in the former without the details of the latter.

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“…At Fermilab, the long-baseline neutrino programme motivates the need for a significant upgrade of the proton beam intensity. The PIP-II linac will be CW capable and will use superconducting RF technology to provide 1.6 MW of 0.8 GeV protons available for a variety of experiments [19]. Conceptual designs exist to provide about 100 kW of protons to an upgraded Mu2e experiment, Mu2e-II, with over 10 11 stop-µ − /s.…”

Section: Beam Facilitiesmentioning

confidence: 99%

Charged Lepton Flavour Violation using Intense Muon Beams at Future Facilities

Baldini

Glenzinski²,

Kapusta³

et al. 2018

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A submission to the 2020 update of the European Strategy for Particle Physics on behalf of the COMET, MEG, Mu2e and Mu3e collaborations. AbstractCharged-lepton flavour-violating (cLFV) processes offer deep probes for new physics with discovery sensitivity to a broad array of new physics models -SUSY, Higgs Doublets, Extra Dimensions, and, particularly, models explaining the neutrino mass hierarchy and the matterantimatter asymmetry of the universe via leptogenesis. The most sensitive probes of cLFV utilize high-intensity muon beams to search for µ → e transitions.We summarize the status of muon-cLFV experiments currently under construction at PSI, Fermilab, and J-PARC. These experiments offer sensitivity to effective new physics mass scales approaching O(10 4 ) TeV/c 2 . Further improvements are possible and next-generation experiments, using upgraded accelerator facilities at PSI, Fermilab, and J-PARC, could begin data taking within the next decade. In the case of discoveries at the LHC, they could distinguish among alternative models; even in the absence of direct discoveries, they could establish new physics. These experiments both complement and extend the searches at the LHC.Contact: André Schöning [schoning@physi.uni-heidelberg.de] arXiv:1812.06540v1 [hep-ex] Executive Summary• Charged-lepton flavour-violating (cLFV) processes provide an unique discovery potential for physics beyond the Standard Model (BSM). These cLFV processes explore new physics parameter space in a manner complementary to the collider, dark matter, dark energy, and neutrino physics programmes.

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The PIP-II Conceptual Design Report

Cited by 23 publications

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Field-Enhanced Superconductivity in High-Frequency Niobium Accelerating Cavities

Field-Enhanced Superconductivity in High-Frequency Niobium Accelerating Cavities

The Mu2e Experiment

Charged Lepton Flavour Violation using Intense Muon Beams at Future Facilities

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