A New CERN PS Transverse Damper (2009)
Blas, A, Belleman, J M, Benedetto, E, Caspers, F, Glenat, D C, Louwerse, R, ...
Since 1999 the PS has been operated without active transverse damping thanks to an increase of the coupling between the transverse planes and the reduction of injection steering errors. Although the...
LHC Beams from the CERN PS Booster (2009)
Mikulec, B, Blas, A, Carli, C, Findlay, A, Hanke, K, Rumolo, G, ...
The CERN PS Booster (PSB) produces a variety of beam flavours for the LHC. While the nominal LHC physics beams require 6 Booster bunches with intensities up to 1.6·1012 protons per bunch, during the...
Coherent tune shift and instabilities measurements at the CERN Proton Synchrotron Booster (2009)
Quatraro, D, Rumolo, G, Blas, A, Chanel, M, Findlay, A, Mikulec, B
To understand one of the contributions to the intensity limitations of the CERN Proton Synchrotron Booster (PSB) in view of its operation with beams from Linac 4, the impedance of the machine has...
Studies on single batch transfer of the LHC type beams between the CERN PS Booster and the PS (2009)
Blas, A, Carli, C, Findlay, A, Garoby, R, Hancock, S, Hanke, K, ...
At present, for most LHC type physics beams, six buckets of the PS operated with harmonic number h=7 are filled in two transfers, and each of the PS Booster rings provides only one bunch. The scheme...
LEIR: TOWARDS THE NOMINAL LEAD ION BEAM (2008)
M. Chanel, M. E Angoletta, V. Baggiolini, P. Belochitskii, A. Beuret, A. Blas, ...
The Low Energy Ion Ring (LEIR) is a central piece for LHC ion operation at CERN, transforming long Linac3 pulses into high density bunches needed for LHC. The first phase of LEIR commissioning...
THE LHC LEAD INJECTOR CHAIN (2008)
A. Beuret, J. Borburgh, A. Blas, H. Burkhardt, C. Carli, M. Chanel, ...
A sizeable part of the LHC physics programme foresees lead-lead collisions with a design luminosity of 10 27 cm-2 s-1. This will be achieved after an upgrade of the ion injector chain comprising...
Nominal LHC Beam Instability Observations in the CERN Proton Synchrotron (2007)
Steerenberg, R, Arduini, Gianluigi, Benedetto, E, Blas, A, Höfle, Wolfgang, Métral, E, ...
The nominal LHC beam has been produced successfully in the CERN Proton Synchrotron since 2003. However, after having restarted the CERN PS in spring 2006, the LHC beam was set-up and observed to be...
Evaluation of vector signal analyzer for beam transfer function measurements in PS booster (2006)
Blas, A, Hancock, S, Koscielniak, S, Lindroos, M, Sjöström, M
The LHC Lead Injector Chain (2004)
Beuret, A, Borburgh, J, Blas, A, Burkhardt, H, Carli, Christian, Chanel, M, ...
A sizeable part of the LHC physics programme foresees lead-lead collisions with a design luminosity of 1027 cm-2 s-1. This will be achieved after an upgrade of the ion injector chain comprising...
The PS complex produces the nominal LHC beam (2000)
Benedikt, Michael, Blas, A, Borburgh, J, Cappi, R, Chanel, M, Chohan, V, ...
The LHC [1] will be supplied, via the SPS, with protons from the pre-injector chain comprising Linac2, PS Booster (PSB) and PS. These accelerators have under-gone a major upgrading programme [2]...
Hollow bunch distributions at high intensity in the PS booster (2000)
Blas, A, Hancock, S, Lindroos, M, Koscielniak, Shane Rupert
Bunches from the CERN PS Booster (PSB) with an improved bunching factor due to a hollow longitudinal distribution would facilitate the production of a high-intensity (>7´1012/bunch) proton beam...
Hollow bunch distributions at high intensity in the PS booster (2000)
Blas, A, Hancock, S, Lindroos, M, Koscielniak, Shane Rupert
Bunches from the CERN PS Booster (PSB) with an improved bunching factor due to a hollow longitudinal distribution would facilitate the production of a high-intensity (>7´1012/bunch) proton beam...
Reduction of the Impedance Created by the Insulated Vacuum Flanges in the PS Booster (2000)
Blas, A, Chanel, M, Carli, Christian, Lacroix, C
The original vacuum flange assembly in the PS Booster (PSB) was designed to present insulation at low frequency and conduction to the beam image current above 2 MHz. However, in order to satisfy the...
Reduction of the Impedance Created by the Insulated Vacuum Flanges in the PS Booster (2000)
Blas, A, Chanel, M, Carli, Christian, Lacroix, C
The original vacuum flange assembly in the PS Booster (PSB) was designed to present insulation at low frequency and conduction to the beam image current above 2 MHz. However, in order to satisfy the...
New technique for bunch shape flattening (1999)
Blas, A, Hancock, S, Koscielniak, Shane Rupert, Lindroos, M, Pedersen, F
A technique for increasing the bunching factor (Bf) is described. Typically in booster-type synchrotrons, it is important to reduce the transverse space-charge tune shift. One means to achieve this...
New technique for bunch shape flattening (1999)
Blas, A, Hancock, S, Koscielniak, Shane Rupert, Lindroos, M, Pedersen, F
A technique for increasing the bunching factor (Bf) is described. Typically in booster-type synchrotrons, it is important to reduce the transverse space-charge tune shift. One means to achieve this...
Explanation of Sextupole Instability in CERN PS Booster (1998)
Blas, A, Koscielniak, Shane Rupert, Pedersen, F
Dual harmonic RF systems have been discussed for many years: to promote Landau damping, to reduce transverse space-charge, and to improve Touschek lifetime. Since its introduction into the CPS...
Beams in the CERN PS complex after the RF upgrades for LHC (1998)
Blas, A, Cappi, R, Garoby, R, Hancock, S, Schindl, Karlheinz, Vallet, J L
In preparation for the Large Hadron Collider (LHC), extensive modifications have been made to the RF equipment of the PS Booster (PSB) and of the PS during the winter shut down 97-98. Low-frequency...