CERN Accelerating science

CERN Document Server 15 のレコードが見つかりました。  1 - 10次  レコードへジャンプ: 検索にかかった時間: 0.52 秒 
1.
Measurements of the Dielectric Properties of a Ferroelectric Ceramic for Use in a Fast Reactive Tuner / FREEMIRE, Ben (Euclid TechLabs)
A FerroElectric Fast Reactive Tuner (FE-FRT) for superconducting radio frequency cavities offers several advantages over conventional mechanical tuners, including faster reaction time, no moving parts, and a wide tuning range. [...]
CERN-ACC-NOTE-2020-0070.
- 2020. - 32 p.
Full text
2.
Transverse Emittance Reduction in Muon Beams by Ionization Cooling / MICE Collaboration
Accelerated muon beams have been considered for next-generation studies of high-energy lepton-antilepton collisions and neutrino oscillations. However, high-brightness muon beams have not yet been produced. [...]
arXiv:2310.05669; STFC-P-2023-004; FERMILAB-PUB-23-613-AD-ND-PPD.- 2024-07-17 - 6 p. - Published in : Nature Phys.
- Published in : Nature Phys. Fulltext: 2310.05669 - PDF; publication - PDF; FERMILAB-PUB-23-613-AD-ND-PPD - PDF; erratum - PDF; External links: Fermilab Accepted Manuscript; Interesting Engineering article
3.
Multiple Coulomb Scattering of muons in Lithium Hydride / MICE Collaboration
Multiple Coulomb Scattering (MCS) is a well known phenomenon occurring when charged particles traverse materials. Measurements of muons traversing low $Z$ materials made in the MuScat experiment showed that theoretical models and simulation codes, such as GEANT4 (v7.0), over-estimated the scattering. [...]
arXiv:2209.10251; RAL-P-2022-001; FERMILAB-PUB-22-729-AD-ND-PPD.- 2022-11-01 - 19 p. - Published in : Phys. Rev. D 106 (2022) 092003 Fulltext: FERMILAB-PUB-22-729-AD-ND-PPD - PDF; 2209.10251 - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server
4.
Amorphous and Diamond-Like Carbon coatings for SEY reduction of dielectric materials for accelerating structure applications / Grudiev, Alexej (CERN) ; Neupert, Holger (CERN) ; Vollenberg, Wilhelmus (CERN) ; Jing, Chunguang (Euclid Techlabs LLC) ; Poddar, Shashi (Euclid Techlabs LLC) ; Freemire, Ben (Euclid Techlabs LLC)
Multipactor discharges in dielectric accelerating structures are a major limitation on the performance of this otherwise very promising technology for future high energy physics machines and other applications. [...]
CERN-ACC-2022-0006 ; CLIC-Note-1175.
- 2022 - 16.
Full text
5.
A Compact, Low-Field, Broadband Matching Section for Externally-Powered X-Band Dielectric-Loaded Accelerating Structures / Wei, Yelong (CERN ; Liverpool U. ; Cockcroft Inst. Accel. Sci. Tech.) ; Bursali, Hikmet (Rome U.) ; Catalán Lasheras, Nuria (CERN) ; Freemire, Ben (Euclid Techlabs, Solon) ; González Antón, Sergio (CERN) ; Grudiev, Alexej (CERN) ; Jing, Chunguang (Euclid Techlabs, Solon) ; Sauza-Bedolla, Joel (Lancaster U.) ; Wegner, Rolf (CERN) ; Welsch, Carsten P (Liverpool U. ; Cockcroft Inst. Accel. Sci. Tech.)
It has been technically challenging to efficiently couple external radiofrequency (RF) power to cylindrical dielectric-loaded accelerating (DLA) structures. This is especially true when the DLA structure has a high dielectric constant. [...]
Geneva : JACoW, 2021 - 4 p. - Published in : JACoW IPAC 2021 (2021) 495-498 Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.495-498
6.
Design, fabrication, and low-power rf measurement of an X-band dielectric-loaded accelerating structure / Wei, Yelong (CERN ; Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U.) ; Bursali, Hikmet (CERN ; Rome U.) ; Grudiev, Alexej (CERN) ; Freemire, Ben (Euclid TechLabs, Rockville) ; Jing, Chunguang (Euclid TechLabs, Rockville ; Argonne) ; Bedolla, Joel Sauza (Lancaster U.) ; Wegner, Rolf (CERN) ; Welsch, Carsten (Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U.)
Dielectric-loaded accelerating (DLA) structures are being studied as an alternative to conventional disk-loaded copper structures to produce the high accelerating gradient. This paper presents the design, fabrication and low-power RF measurement of an externally-powered X-band DLA structure with a dielectric constant $\varepsilon$$_{r}$ = 16.66 and a loss tangent tan$_{\delta}$ = 3.43 x 10$^{-5}$. [...]
arXiv:2110.12147.- 2022-04-01 - 16 p. - Published in : Phys. Rev. Accel. Beams 25 (2022) 041301 Fulltext: PhysRevAccelBeams.25.041301 - PDF; 2110.12147 - PDF;
7.
Performance of the MICE diagnostic system / Mice Collaboration
Muon beams of low emittance provide the basis for the intense, well-characterised neutrino beams of a neutrino factory and for multi-TeV lepton-antilepton collisions at a muon collider. The international Muon Ionization Cooling Experiment (MICE) has demonstrated the principle of ionization cooling, the technique by which it is proposed to reduce the phase-space volume occupied by the muon beam at such facilities. [...]
arXiv:2106.05813; RAL-P-2021-001.- 2021-08-16 - 27 p. - Published in : JINST 16 (2021) P08046 Fulltext: 2106.05813 - PDF; fermilab-pub-21-284-ad-nd - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server
8.
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;
9.
Mitigation of space charge effects using electron column at IOTA ring / Park, C S (Korea U.) ; Freemire, B (Euclid TechLabs, Rockville) ; Stern, E (Fermilab) ; Mitchell, C E (LBNL, Berkeley)
We investigate a novel method to mitigate space charge effects of high intensity proton beams propagating in circular accelerators by means of trapping and controlling electrons generated from beam-induced residual gas ionization. This compensation method uses Coulomb repulsion force between a proton beam and electrons to mitigate self-space charge effects of the beam if it passes through a plasma column. [...]
2020 - 3 p. - Published in : 10.23732/CYRCP-2020-009.112 Fulltext: PDF;
In : ICFA mini-Workshop on Mitigation of Coherent Beam Instabilities in Particle Accelerators (MCBI 2019), Zermatt, Switzerland, 23 - 27 Sep 2019, pp.112 (CERN-2020-009)
10.
A Compact, Low-Field, Broadband Matching Section for Externally Powered <i>X</i>-Band Dielectric-Loaded Accelerating Structures / Wei, Yelong (CERN) ; Grudiev, Alexej (CERN) ; Freemire, Ben (Euclid TechLabs, Rockville) ; Jing, Chunguang (Euclid TechLabs, Rockville)
It has been technically challenging to efficiently couple external radiofrequency (RF) power to cylindrical dielectric-loaded accelerating (DLA) structures, especially when the DLA structure has a high dielectric constant. This paper presents a novel design of matching section for coupling the RF power from a circular waveguide to an X-band DLA structure with a dielectric constant $\varepsilon$$_{r}$ = 16.66 and a loss tangent tan$\delta$ = 3.43 x 10$^{-5}$. [...]
arXiv:2008.09203.- 2022-05 - 11 p. - Published in : IEEE Trans. Nucl. Sci. 69 (2022) 991-1001 Fulltext: 2008.09203 - PDF; Publication - PDF;

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