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  • 1
    Online Resource
    Online Resource
    Validation of transfer map calculation for electrostatic deflectors in the code COSY INFINITY
    World Scientific Pub Co Pte Ltd ; 2019
    In:  International Journal of Modern Physics A Vol. 34, No. 36 ( 2019-12-30), p. 1942010-
    Details
    In: International Journal of Modern Physics A, World Scientific Pub Co Pte Ltd, Vol. 34, No. 36 ( 2019-12-30), p. 1942010-
    Abstract: The code COSY INFINITY uses a beamline coordinate system with a Frenet–Serret frame relative to the reference particle, and calculates differential algebra-valued transfer maps by integrating the ODEs of motion in the respective vector space over a differential algebra (DA). We described and performed computation of the DA transfer map of an electrostatic spherical deflector in a laboratory coordinate system using two conventional methods: (1) by integrating the ODEs of motion using a numerical integrator and (2) by computing analytically and in closed form the properties of the respective elliptical orbits from Kepler theory. We compared the resulting transfer maps with (3) the DA transfer map of COSY INFINITY’s built-in electrostatic spherical deflector element [Formula: see text] and (4) the transfer map of the electrostatic spherical deflector computed using the program GIOS, which uses analytic formulas from a paper 1 by Hermann Wollnik regarding second-order aberrations. In addition to the electrostatic spherical deflector, we studied an electrostatic cylindrical deflector, where the Kepler theory is not applicable. We computed the DA transfer map by the ODE integration method (1), and we compared it with the transfer maps by (3) COSY INFINITY’s built-in electrostatic cylindrical deflector element [Formula: see text] and (4) GIOS. The transfer maps of electrostatic spherical and cylindrical deflectors obtained using the direct calculation methods (1) and (2) are in excellent agreement with those computed using (3) COSY INFINITY. On the other hand, we found a significant discrepancy with (4) the program GIOS.
    Type of Medium: Online Resource
    ISSN: 0217-751X , 1793-656X
    URL: Article
    DOI: 10.1142/S0217751X19420107
    RVK:
    UA 4381
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2019
    SSG: 16,12
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  • 2
    Online Resource
    Online Resource
    Future facilities at PSI, the High-Intensity Muon Beams (HIMB) project
    EDP Sciences ; 2023
    In:  EPJ Web of Conferences Vol. 282 ( 2023), p. 01012-
    Details
    In: EPJ Web of Conferences, EDP Sciences, Vol. 282 ( 2023), p. 01012-
    Abstract: Currently, PSI delivers the most intense continuous muon beam in the world with up to a few 10 8 µ + /s. The High-Intensity Muon Beams (HIMB) project is developing a new target station and muon beamlines able to deliver 10 10 µ + /s, with a huge impact for low-energy, high-precision muon experiments. While the next generation of proton drivers with beam powers in excess of the currently achieved 1.4 MW still require significant research and development, the focus of HIMB is to improve the surface muon yield with a new target geometry and to increase capture and transmission with a solenoid-based beamline in order to reach a total efficiency of approximately 10 %. We present the current status of the HIMB project.
    Type of Medium: Online Resource
    ISSN: 2100-014X
    URL: Article
    DOI: 10.1051/epjconf/202328201012
    Language: English
    Publisher: EDP Sciences
    Publication Date: 2023
    detail.hit.zdb_id: 2595425-8
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  • 3
    Online Resource
    Online Resource
    Computation of the main and fringe fields for the electrostatic quadrupoles of the muon g − 2 storage ring
    World Scientific Pub Co Pte Ltd ; 2019
    In:  International Journal of Modern Physics A Vol. 34, No. 36 ( 2019-12-30), p. 1942041-
    Details
    In: International Journal of Modern Physics A, World Scientific Pub Co Pte Ltd, Vol. 34, No. 36 ( 2019-12-30), p. 1942041-
    Abstract: We developed a highly accurate and fully Maxwellian conformal mapping method for calculation of main fields of electrostatic particle optical elements. A remarkable advantage of this method is the possibility of rapid recalculations with geometric asymmetries and mispowered plates. We used this conformal mapping method to calculate the multipole terms of the high voltage quadrupoles in the storage ring of the Muon [Formula: see text] Experiment (FNAL-E-0989). Next, we demonstrate that an effect where the observed tunes correspond to a voltage that is about [Formula: see text] higher compared to the voltage to which the Muon [Formula: see text] quadrupoles are set is explained by the conceptual and quantitative differences between the beam optics quadrupole voltage and the quadrupole voltage at the plates. Completing the methodological framework for field computations, we present a method for extracting multipole strength falloffs of a particle optical element from a set of Fourier mode falloffs. We calculated the quadrupole strength falloff and its effective field boundary (EFB) for the Muon [Formula: see text] quadrupole, which has explained the experimentally measured tunes, while simple estimates based on a linear model exhibited discrepancies up to [Formula: see text].
    Type of Medium: Online Resource
    ISSN: 0217-751X , 1793-656X
    URL: Article
    DOI: 10.1142/S0217751X19420417
    RVK:
    UA 4381
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2019
    SSG: 16,12
    Location Call Number Limitation Availability
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    Online Resource
  • 4
    Online Resource
    Online Resource
    Beamline design and optimisation for high intensity muon beams at PSI
    IOP Publishing ; 2023
    In:  Journal of Physics: Conference Series Vol. 2420, No. 1 ( 2023-01-01), p. 012053-
    Details
    In: Journal of Physics: Conference Series, IOP Publishing, Vol. 2420, No. 1 ( 2023-01-01), p. 012053-
    Abstract: The High Intensity Muon Beams (HIMB) project at the Paul Scherrer Institute (PSI) will provide muon intensities of the order of 10 10 muons/s for particle physics and material science experiments, two orders of magnitude higher than the state of the art, which is currently available also at PSI. In particle transport simulations for the HIMB, we use G4beamline with measured + cross-sections and with variance reduction. We also use the codes COSY INFINITY, TRANSPORT , and TURTLE for some studies. We perform asynchronous Bayesian optimisation of the beamlines on a computing cluster using G4beamline and the optimisation package DeepHyper . We performed numerous studies for the design of the HIMB, and we produced various results, including the muon transmission, beam phase space, polarisation, and momentum spectrum.
    Type of Medium: Online Resource
    ISSN: 1742-6588 , 1742-6596
    URL: Article
    DOI: 10.1088/1742-6596/2420/1/012053
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2023
    detail.hit.zdb_id: 2166409-2
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