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2020-03-24
17:10
Stripper foil investigations at Linac3 / Bellodi, Giulia (CERN) ; Bertolo, Sebastien (CERN) ; Kuchler, Detlef (CERN) ; Mahner, Edgar (CERN) ; Scrivens, Richard (CERN) ; Wenander, Fredrik John Carl (CERN)
This report contains a summary of the investigations performed on the carbon stripper foils at Linac3 during the period 2016 to 2018 [...]
CERN-ACC-NOTE-2020-0016.
- 2020. - 24 p.
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2020-03-12
06:25
Novel transverse emittance measurements for electron cooling characterization / Hunt, J R (Liverpool U. ; Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U.) ; Resta-López, J (Liverpool U. ; Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U.) ; Welsch, C P (Liverpool U. ; Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U.) ; Carli, C (CERN) ; Dupuy, B (CERN) ; Gamba, D (CERN)
The extra low energy antiproton ring (ELENA) finished commissioning before the start of CERN’s second long shutdown in December 2018, successfully providing beams to a new experimental zone. In 2021, ELENA will begin distributing cooled 100 keV antiproton beams to all antimatter experiments. [...]
2020 - 9 p. - Published in : Phys. Rev. Accel. Beams 23 (2020) 032802 Fulltext: PDF;

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2020-03-06
09:07
Measurements with the stripping foil test stand in the Linac4 Transfer Line / Bracco, Chiara (CERN) ; Jorat, Louise (CERN) ; Noulibos, Remy (CERN) ; van Trappen, Pieter (CERN) ; Weterings, Wim (CERN)
In 2020, after the CERN accelerators complex Long Shutdown 2 (LS2), a novel Linac4 (L4)-to-PS Booster (PSB) charge-exchange injection system will allow to transform the L4 160 MeV H$^-$ beam into H$^+$, which will be injected into the four PSB superposed rings. For this, a 200 µg/cm$^2$ carbon stripping foil will convert negative hydrogen ions (H$^-$) into protons by stripping off the electrons. [...]
2020 - 6 p. - Published in : EPJ Web Conf. 229 (2020) 01003 Fulltext: PDF;
In : 29th World Conference of the International Nuclear Target Development Society, East Lansing, United States, 8 - 12 Oct 2018, pp.01003

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2020-02-27
23:33
Exact Solutions of Indirect Transverse Field Effects in Elongated Structures with Applications to CERN LHC and PS / Hirlander, Simon
The understanding of the electromagnetic interaction of the particle beam with the surrounding elements - so-called indirect space charge driven (ISCD) effects - in particle accelerators, is crucial for stable high-intensity performance [...]
CERN-THESIS-2020-009 -

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2020-02-27
06:16
Simulation studies of the beam cooling process in presence of heating effects in the Extra Low ENergy Antiproton ring (ELENA) / Resta-López, J (Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U.) ; Hunt, J R (Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U.) ; Karamyshev, O (Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U.) ; Welsch, C P (Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U.)
The Extra Low ENergy Antiproton ring (ELENA) is a small synchrotron equipped with an electron cooler, which is currently being constructed at CERN to further decelerate antiprotons from the Antiproton Decelerator (AD) from 5.3 MeV to energies as low as 100 keV. At such low energies it is very important to carefully take contributions from electron cooling and beam heating mechanisms (e.g. [...]
IOP, IOP, 2015 - 24 p. - Published in : JINST 10 (2015) P05012
- Published in : JINST 10 (2015) E08001 Published erratum: PDF;

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2020-02-21
09:30
A Proposal for an Automatic Longitudinal Tomography Demonstration Project in the Proton Synchrotron Booster / Albright, Simon (CERN)
Longitudinal phase space tomography is a vital tool for beam diagnostics in most of the CERN synchrotrons, it is used to reconstruct the longitudinal phase space, and to measure the longitudinal emittance and energy spread. [...]
CERN-ACC-NOTE-2020-0014.
- 2020. - 12 p.
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2020-02-04
08:14
ELENA Commissioning / Gamba, Davide (CERN) ; Carli, Christian (CERN) ; Eriksson, Tommy (CERN) ; Ponce, Laurette (CERN) ; Tranquille, Gerard (CERN)
The Extra Low Energy Antiproton storage ring (ELENA) is an upgrade project at the CERN AD (Antiproton Decelerator). ELENA will further decelerate the 5.3 MeV antiprotons coming from the AD down to 100 keV and allow the experiments typically operating traps to increase the capture efficiency. [...]
2019 - 3 p. - Published in : 10.18429/JACoW-COOL2019-WEX03 Fulltext: 10.18429_JACoW-COOL2019-WEX03 - PDF; wex03 - PDF;
In : International Workshop on Beam Cooling and Related Topics, Novosibirsk, Russian Federation, September 23 - 27, 2019, pp.WEX03

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2020-02-04
08:14
First Operation for Stochastic Cooling of P-Bars in the CERN AD Using Optical Delay Notch Filter and Plans 2021 Operation / Höfle, Wolfgang (CERN) ; Arnaudon, Luca (CERN) ; Bjørsvik, Endre (CERN) ; Caspers, Fritz (CERN) ; Eriksson, Tommy (CERN) ; Louwerse, Reinier (CERN) ; Myklebust, Vebjorn Roed (CERN)
As part of the consolidation of the stochastic coolingsystem of the CERN Antiproton Decelerator a notch filter with optical delay lines has been developed. During the 2018 run of AD a notch filter with optical delay lines for the longitudinal stochastic cooling at 3.5 GeV/c was successfully tested with beam for the first time. [...]
2019 - 5 p. - Published in : 10.18429/JACoW-COOL2019-MOY01 Fulltext: 10.18429_JACoW-COOL2019-MOY01 - PDF; moy01 - PDF;
In : International Workshop on Beam Cooling and Related Topics, Novosibirsk, Russian Federation, September 23 - 27, 2019, pp.MOY01

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2020-01-25
10:34
Source of horizontal instability at the CERN Proton Synchrotron Booster / Koukovini-Platia, E (CERN) ; Barnes, M J (CERN) ; Bartosik, H (CERN) ; Rumolo, G (CERN) ; Sermeus, L (CERN) ; Zannini, C (CERN)
The CERN Proton Synchrotron Booster (PSB) has been known to suffer from horizontal instabilities since its early operation in the 1970s. These instabilities appear at specific beam energies and range of working points. [...]
2020 - 16 p. - Published in : Phys. Rev. Accel. Beams 22 (2020) 124201 Fulltext: PDF;

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2020-01-24
06:18
A Magnetic Measurement Model for Real-Time Control of Synchrotrons / Grech, Christian (CERN) ; Buzio, Marco (CERN) ; Sammut, Nicholas (U. Malta)
In this paper, we present a measurement model for estimating the magnetic field of a synchrotron-type particle accelerator, based on sensors installed in a reference magnet. The model combines the calibration of the individual sensors with the experimental characterization of the magnets to infer, in absolute terms, the value of the average field in the ring, as needed for the real-time feedback control of the accelerator. [...]
2019 - 8 p. - Published in : IEEE Trans. Instrum. Meas. 69 (2019) 393-400 Fulltext: PDF;

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