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1.
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HL-LHC Beam Dynamics with Hollow Electron Lenses
/ Hermes, Pascal (CERN) ; Bruce, Roderik (CERN) ; De Maria, Riccardo (CERN) ; Giovannozzi, Massimo (CERN) ; Mereghetti, Alessio (CERN) ; Mirarchi, Daniele (CERN) ; Redaelli, Stefano (CERN) ; Stancari, Giulio (Fermilab)
Each of the two proton beams in the High-Luminosity Large Hadron Collider (HL-LHC) will carry a total energy of 700 MJ. One concern for machine protection is the energy stored in the transverse beam halo, estimated to potentially reach up to 5% of the total stored energy. [...]
FERMILAB-CONF-22-369-AD.-
2022 - 6 p.
- Published in : JACoW HB 2021 (2022) 59-64
Fulltext: jt - PDF; document - PDF; External link: Fermilab Library Server
In : 64th ICFA Advanced Beam Dynamics Workshop on High Intensity and High Brightness Hadron Beams (HB 2021), Batavia, Illinois, United States, 4 - 9 Oct 2021, pp.59-64
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2.
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Nonlinear dynamics of proton beams with hollow electron lens in the CERN high-luminosity LHC
/ Mirarchi, D (CERN ; U. Manchester (main)) ; Appleby, R B (U. Manchester (main) ; Cockcroft Inst. Accel. Sci. Tech.) ; Bruce, R (CERN) ; Giovannozzi, M (CERN) ; Mereghetti, A (CERN) ; Redaelli, S (CERN) ; Stancari, G (Fermilab)
The design stored beam energy in the CERN high-luminosity large hadron collider
(HL-LHC) upgrade is about 700 MJ, with about 36 MJ in the beam tails, according to estimates
based on scaling considerations from measurements at the LHC. Such a large amount of
stored energy in the beam tails poses serious challenges on its control and safe disposal.
In particular, orbit jitters can cause significant losses on primary collimators, which can
lead to accidental beam dumps, magnet quenches, or even permanent damage to collimators
and other accelerator elements. [...]
FERMILAB-PUB-21-713-AD.-
2022 - 28 p.
- Published in : Eur. Phys. J. Plus 137 (2022) 7
Fulltext from Publisher: PDF;
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3.
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First Results of the IOTA Ring Research at Fermilab
/ Valishev, Alexander (Fermilab) ; Arodzero, Anatoli (RadiaBeam Tech.) ; Broemmelsiek, Daniel (Fermilab) ; Bruhwiler, David (RadiaSoft, Boulder) ; Burov, Alexey (Fermilab) ; Carlson, Kermit (Fermilab) ; Cathey, Brandon (Fermilab) ; Chattopadhyay, Swapan (Northern Illinois U. ; Fermilab) ; Eddy, Nathan (Fermilab) ; Edelen, Jonathan (RadiaSoft, Boulder) et al.
The IOTA ring at Fermilab is a unique machine exclusively dedicated to accelerator beam physics R&D.; The research conducted at IOTA includes topics such as nonlinear integrable optics, suppression of coherent beam instabilities, optical stochastic cooling and quantum science experiments. In this talk we report on the first results of experiments with implementations of nonlinear integrable beam optics. [...]
2021 - 6 p.
- Published in : 10.18429/JACoW-IPAC2021-MOXB02
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, Br, 24 - 28 May 2021, pp.19-24
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4.
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Beam physics research with the IOTA electron lens
/ Stancari, G (Fermilab) ; Agustsson, R (RadiaBeam Tech.) ; Banerjee, N (Illinois U., Chicago) ; Boffo, C (Fermilab) ; Burov, A (Fermilab) ; Carlson, K (Fermilab) ; Cathey, B (Fermilab) ; Chen, Y C (RadiaBeam Tech.) ; Chung, M (UNIST, Ulsan) ; Crawford, D (Fermilab) et al.
The electron lens in the Fermilab Integrable Optics Test Accelerator (IOTA) will enable new research in nonlinear integrable optics, space-charge compensation, electron cooling, and the stability of intense beams. This research addresses scientific questions on high-brightness beams and operational challenges of high-power accelerators for nuclear and particle physics. [...]
2021 - 33 p.
- Published in : JINST 16 (2021) P05002
Fulltext: PDF;
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5.
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6.
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Design of a compact, cryogen-free superconducting solenoid for the electron lens of the Fermilab Integrable Optics Test Accelerator (IOTA)
/ Dhuley, R C (Fermilab) ; Boffo, C (Fermilab) ; Kashikhin, V (Fermilab) ; Kolehmainen, A (CERN) ; Perini, D (CERN) ; Stancari, G (Fermilab)
The proposed electron lens for Fermilab's Integrable Optics Test Accelerator (IOTA) will broaden its capabilities by enabling new research in nonlinear integrable optics, space-charge compensation, proton beam cooling, and more. The electron lens is based on a 5–10 keV, 1–2 A electron beam, shaped using a 0.7 m long, 0.8 T solenoidal magnetic field. [...]
2021 - 17 p.
- Published in : JINST 16 (2021) T03009
Fulltext: PDF;
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7.
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Hollow electron lenses for beam collimation at the High-Luminosity Large Hadron Collider (HL-LHC)
/ Redaelli, S (CERN) ; Appleby, R B (Fermilab) ; Bruce, R (CERN) ; Brüning, O (CERN) ; Kolehmainen, A (CERN) ; Ferlin, G (CERN) ; Foussat, A (CERN) ; Giovannozzi, M (CERN) ; Hermes, P (CERN) ; Mirarchi, D (CERN ; Manchester U.) et al.
Electrons lenses produce a high-intensity electron beam and have a variety of applications to circular hadron accelerators. Electron beams of different transverse cross sections and distributions may be designed, depending on the desired application, and they are produced and steered along the orbit of the hadron beam, overlapping with it for typical distances of a few meters before being deflected away and disposed of. [...]
2021 - 28 p.
- Published in : JINST 16 (2021) P03042
Fulltext: PDF;
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9.
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ebook
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10.
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Probing LHC halo dynamics using collimator loss rates at 6.5 TeV
/ Gorzawski, A (CERN ; Malta U.) ; Appleby, R B (Manchester U. ; Cockcroft Inst. Accel. Sci. Tech.) ; Giovannozzi, M (CERN) ; Mereghetti, A (CERN) ; Mirarchi, D (CERN) ; Redaelli, S (CERN) ; Salvachua, B (CERN) ; Stancari, G (Fermilab) ; Valentino, G (Malta U.) ; Wagner, J F (CERN ; CERN ; Frankfurt U.)
Halo diffusion measurements at the CERN Large Hadron Collider (LHC) were conducted with beams for physics at 6.5 TeV by means of collimator scans, carried out between 2016 and 2018. From the time evolution of the beam losses recorded during a collimator scan, in which collimator jaws are moved in steps toward the beam core cutting beam tails, one can extract information on the halo diffusion and its population as a function of the transverse amplitude. [...]
2020 - 14 p.
- Published in : Phys. Rev. Accel. Beams 23 (2020) 044802
Fulltext from Publisher: PDF;
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