CERN Accelerating science

ATS Notes

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2017-04-12
09:05
Beam cleaning of the incoming beam in experimental IRs in HL-LHC / Garcia Morales, Hector (University of London (GB)) ; Bruce, Roderik (CERN) ; Redaelli, Stefano (CERN) ; De Maria, Riccardo (CERN)
The HL-LHC will store 675 MJ of energy per beam, about 300 MJ more than the nominal LHC. [...]
CERN-ACC-NOTE-2017-0023.
- 2017. - 13 p.
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2017-04-03
14:39
Measurement Report for the PS-boosterWire Scanner / Vollinger, Christine (CERN) ; Kaltenbacher, Thomas Roland (Universitaet Bern (CH)) ; Kramer, Patrick (Rheinisch-Westfaelische Tech. Hoch. (DE))
This Note discusses the EM-measurements carried out on the prototype of the PS-Booster wire scanner. [...]
CERN-ACC-NOTE-2017-0022.
- 2017. - 4 p.
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2017-04-03
09:40
Crystal Collimation with protons at flat top energy / Rossi, Roberto (Sapienza Universita e INFN, Roma I (IT)) ; Redaelli, Stefano (CERN) ; Galluccio, Francesca (Universita e INFN, Napoli (IT)) ; Masi, Alessandro (CERN) ; Mirarchi, Daniele (CERN) ; Montesano, Simone (CERN) ; Valentino, Gianluca (University of Malta (MT)) ; Scandale, Walter (CERN)
During this MD, performed on November 6th, 2015, bent silicon crystals were tested with proton beams for a possible usage of crystal-assisted collimation. [...]
CERN-ACC-NOTE-2017-0021.
- 2017. - 6 p.
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2017-03-31
15:35
Effect of the total RF voltage on heavy ions at injection energy in the LHC / Schaumann, Michaela (CERN) ; Alemany Fernandez, Reyes (CERN) ; Jebramcik, Marc Andre (Johann-Wolfgang-Goethe Univ. (DE)) ; Jowett, John (CERN) ; Mertens, Tom (CERN)
Emittance growth and particle losses from intra-beam scattering (IBS) are an important source of beam losses, especially at injection energy, for the heavy ions in LHC. [...]
CERN-ACC-NOTE-2017-0020.
- 2017. - 11 p.
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2017-03-30
12:14
LHC MD 1279: Bunch Flattening in Physics / Timko, Helga (CERN) ; Baudrenghien, Philippe (CERN) ; Esteban Muller, Juan ; Shaposhnikova, Elena (CERN)
Vertex reconstruction is not accurate enough for LHCb when the bunch length in physics shrinks below about 0.9 ns. [...]
CERN-ACC-NOTE-2017-0019.
- 2017. - 13 p.
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2017-03-30
12:03
LHC MD 1087: Controlled Longitudinal Emittance Blow-up with Short Bunches / Timko, Helga (CERN) ; Baudrenghien, Philippe (CERN) ; Esteban Muller, Juan ; Jaussi, Michael (CERN) ; Lasheen, Alexandre (CERN) ; Shaposhnikova, Elena (CERN)
The aim of the MD was to study the controlled longitudinal emittance blow-up applied during the ramp with bunches that are slightly shorter than operational. [...]
CERN-ACC-NOTE-2017-0018.
- 2017. - 7 p.
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2017-03-30
11:33
LHC MD 652: Coupled-Bunch Instability with Smaller Emittance (all HOMs) / Esteban Muller, Juan ; shaposhnikova, Elena (CERN) ; Timko, Helga (CERN)
The aim of the MD was to measure the coupled-bunch stability from all HOM impedances, with a reduced longitudinal emittance in order to explore the HL-LHC conditions. [...]
CERN-ACC-NOTE-2017-0017.
- 2017. - 6 p.
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2017-03-30
11:23
LHC MD 232: Longitudinal Impedance Evaluation / Esteban Muller, Juan ; Timko, Helga (CERN) ; Baudrenghien, Philippe (CERN) ; Shaposhnikova, Elena (CERN)
The aim of the MDstudies presented here was to evaluate the imaginary part of the longitudinal impedance of the LHC by means of synchrotron frequency shift measurements [...]
CERN-ACC-NOTE-2017-0016.
- 2017. - 6 p.
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2017-03-16
16:38
Orbit Feedback Operation with RCBX (MD 1209) / Wenninger, Jorg (CERN) ; Jackson, Stephen (CERN) ; Nisbet, David (CERN) ; Ponce, Laurette (CERN) ; Louro Alves, Diogo Miguel (CERN)
The LHC Orbit Feedback (OFB) is able to drive any orbit corrector circuit (COD) to steer the LHC orbit. [...]
CERN-ACC-NOTE-2017-0015.
- 2017.
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2017-03-06
10:50
MD1878: Operation with primary collimators at tighter settings / Mirarchi, Daniele (CERN) ; Amorim, David (Centre National de la Recherche Scientifique (FR)) ; Biancacci, Nicolo (CERN) ; Bruce, Roderik (CERN) ; Buffat, Xavier (CERN) ; Carver, Lee Robert (CERN) ; Fiascaris, Maria (CERN) ; Mereghetti, Alessio (CERN) ; Redaelli, Stefano (CERN) ; Rossi, Roberto (Universita e INFN, Roma I (IT)) et al.
Primary (TCP) collimators of the betatron cleaning insertion determine the betatron cut of the LHC beam. [...]
CERN-ACC-NOTE-2017-0014.
- 2017. - 14 p.
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LHC MD Notes (68)