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MD2004
42 items
last update: 05 Jan 2004, 00:00
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1.
Orbit Response Measurements at the SPS / Wenninger, J
The optics of the SPS ring and the TT40 transfer line have been analyzed using the closed orbit (respectively trajectory) response to controlled corrector magnet deflections. [...]
CERN-AB-2004-009.
- 2004. - 24 p.
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2.
Barrier Buckets and Transient Beam Loading in the SPS / Bohl, T (CERN) ; Damerau, H ; Garoby, R ; Linnecar, Trevor Paul R ; Shaposhnikova, Elena ; Tückmantel, Joachim
Using long bunches held in place by barrier buckets to overcome the limitations associated with peak density in high intensity bunched beams could be a promising scheme for increasing the luminosity of LHC. [...]
CERN-AB-2004-008.
- 2003. - 17 p.
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3.
Measurements of emittance and twiss parameters in LINAC 3 comparison between measurements and simulations / Chamings, J A ; Coco, V ; Lombardi, A M ; Scrivens, R
In the framework of Linac 3 restudy, emittance, and transmission measurements are taken at all stage of acceleration. [...]
AB-Note-2004-002-ABP.
- 2004.
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4.
Comparisons of the CODD and of the Normaliser Systems For Closed Orbit Measurements in the PS / Belleman, J ; González, J L ; Ludwig, M ; Potier, J P ; Steerenberg, R
The PS ring is equipped with 40 position PUs distributed around the ring. [...]
AB-Note-2004-003-BDI.
- 2003.
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5.
Report of the Study Group on the New Multi-Turn Extraction in the PS Machine / Berrig, O E ; Borburgh, J ; Burnet, Jean Paul ; Cappi, R (CERN) ; Giovannozzi, Massimo ; Kalbreier, Willi ; Martini, M ; Müller, A S ; Métral, Elias ; Metzmacher, K D et al.
Since the year 2001 considerable efforts were devoted to the study of a possible replacement of the Continuous Transfer (CT) extraction mode from the PS to the SPS. [...]
CERN-AB-2004-003-ABP.
- 2004. - 35 p.
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6.
SPS New Timing Tests / Jacquet, D ; Paris, V ; Jensen, L ; Wehrle, U ; Verhagen, H ; Partinod, P ; Semanaz, P ; Jonker, M ; Lewis, J ; Bau, J C et al.
The SPS master timing generator is foreseen to be replaced in 2004 by a central timing generator called CBCM, which will control the whole accelerator complex. [...]
AB-Note-2004-007-MD ; CERN-AB-Note-2004-007-MD.
- 2003.
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7.
Options for improving the actupoles used for the multi-turn extraction studies / Berrig, O E ; Giovannozzi, Massimo ; Russenschuck, Stephan
The proposed under study in the PS machine requires magnets generating nonlinear magnetic fields, e.g. [...]
AB-Note-2004-012-ABP ; CERN-AB-Note-2004-012-ABP.
- 2004.
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8.
Betatron Resonance Studies at the PS Booster by Harmonic Analysis of Turn-by-turn Beam Position Data / Urschütz, Peter
A new multi-turn acquisition system with the purpose to determine resonance driving terms from turn-by-turn beam position data was installed in the PS Booster. [...]
AB-Note-2004-024 ; CERN-AB-Note-2004-024.
- 2004.
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9.
Linear optics measurements using an AC-Dipole Excitation / Catalan-Lasheras, N ; Fartoukh, Stéphane David ; Koutchouk, Jean-Pierre
The feasibility of using an AC-Dipole-type excitation to create a long-lasting coherent beam oscillation without emittance blow-up was successfully verified in the SPS machine during past experiments [1, 2]. [...]
AB-Note-2004-018 ; CERN-AB-Note-2004-018.
- 2004.
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10.
Energy loss of a single bunch in the SPS / Bohl, T (CERN) ; Hofmann, A ; Linnecar, Trevor Paul R ; Shaposhnikova, Elena ; Tückmantel, Joachim
The dependence of energy loss on bunch length was determined experimentally for a single bunch from measurements of the synchronous phase as a function of intensity for different capture voltage amplitudes at 26 GeV in the SPS. [...]
AB-Note-2004-017 ; CERN-AB-Note-2004-017.
- 2004.
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11.
SPS extraction kicker magnet cooling design / Timmins, M ; Bertarelli, A ; Gaxiola, E ; Uythoven, J
The document describes the various steps taken in the design, tests and simulations of a new cooling system for the SPS extraction kicker magnets for points LSS4 and LSS6..
AB-Note-2004-005-BT ; TS-Note-2004-001-MME ; CERN-AB-Note-2004-005-BT ; CERN-TS-Note-2004-001-MME.
- 2004.
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12.
1st LHC Project Workshop - Chamonix XIII   19 - 23 Jan 2004  - Chamonix, France  / Poole, John (ed.) (CERN)
The workshop in 2004 was the first in the series devoted to the LHC Project and was composed of 10 half day sessions. It started with a session devoted to issues in injector chain which was followed by a session devoted to beam milestones in the period 2003-2007. [...]
Geneva : CERN, 2004 - 330 p. CERN-AB-2004-014-ADM Conference home page - e-proceedings - CERN library copies
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13.
RESTUDY OF LINAC 3 FOR ACCELERATION OF SEVERAL CHARGE STATES OF LEAD ION / Coco, V ; Lombardi, A M ; Sargsyan, E ; Scrivens, R
In the framework of CERN Linac 3 restudy, the possibility of accelerating several charge states is studied. [...]
AB-Note-2004-033 ; CERN-AB-Note-2004-033.
- 2004.
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14.
Studies of capture loss of the LHC beam in the SPS / Bohl, T (CERN) ; Linnecar, Trevor Paul R ; Shaposhnikova, Elena ; Tückmantel, Joachim
The matched voltage of the LHC beam at injection in the SPS with the nominal longitudinal parameters (bunch length 4.2 ns and emittance 0.35 eVs) is 750 kV. [...]
AB-Note-2004-036 ; CERN-AB-Note-2004-036.
- 2004.
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15.
Scrapping and Collimation Tests in the SPS / Fischer, C ; Gras, J J ; Jung, R
Scraping of the SPS beam will be required prior to extraction towards the LHC in order to remove the beam tails and ensure clean injection conditions. [...]
AB-Note-2004-037 ; CERN-AB-Note-2004-037.
- 2004.
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16.
Measurements on Pb27+ Sources for the CERN Heavy Ion Injection Chain / Chamings, J A
CERN, the world's largest particle physics laboratory near Geneva, is currently in the process of building the Large Hadron Collider (LHC) [...]
AB-Note-2004-044 CERN-AB-Note-2004-044. - Geneva : CERN, 2004.

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17.
Report of the High Intensity Protons Working Group / Benedikt, Michael ; Cornelis, K ; Garoby, R ; Métral, Elias ; Ruggiero, F ; Vretenar, Maurizio
The availability and the quality of the "low" energy accelerators have always been a strong asset of our laboratory, and a convincing argument for the construction at CERN of a new accelerator at the energy frontier. [...]
CERN-AB-2004-022-OP-RF.
- 2004. - 58 p.
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18.
Measurements of quadrupole frequency shift below transition / Bohl, T (CERN) ; Linnecar, Trevor Paul R ; Shaposhnikova, Elena ; Tückmantel, Joachim
Measurements of the quadrupole frequency shift done at 14 GeV/c with a single bunch for different bunch lengths and intensities are compared with estimations based on the nonlinear dependence of frequency on the amplitude of oscillation and the present model of the longitudinal SPS impedance. [...]
AB-Note-2004-047 ; CERN-AB-Note-2004-047.
- 2004.
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19.
Pilot Bunch in the LHC Injector Chain / Arduini, Gianluigi ; Benedikt, Michael ; Bohl, T (CERN) ; Carli, Christian ; Hancock, S ; Hanke, K ; Métral, Elias ; Roncarolo, F ; Steerenberg, R
During the 2003 run pilot bunches have been accelerated through the whole injector chain and have been delivered for TT40 extraction tests. [...]
AB-Note-2004-050 ; CERN-AB-Note-2004-050.
- 2004.
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20.
ORBIT FEEDBACK CONTROL FOR THE LHC Prototyping at the SPS / Steinhagen, Ralph J
The Large Hadron Collider (LHC) is the next generation proton collider that is presently built at CERN. [...]
AB-Note-2004-052 ; CERN-AB-Note-2004-052.
- 2004.
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21.
Design and Tests of a New Rest Gas Ionisation Profile Monitor Installed in the SPS as a Prototype for the LHC / Fischer, C ; Koopman, J ; Kramer, Daniel ; Perret, R ; Sillanoli, M
Based on the encouraging results obtained with a Rest Gas Ionization Profile Monitor of a first generation, a new monitor was designed and then installed in the SPS at the beginning of 2002. Its design fulfills all the requirements for a future installation in the LHC where four such monitors are foreseen. [...]
CERN-AB-2004-031-BDI.- Geneva : CERN, 2004 - 9 p. - Published in : AIP Conf. Proc. 732 (2004) 133-140 Access to fulltext document: PDF; External link: Published version from AIP
In : 11th Beam Instrumentation Workshop, Knoxville, TN, USA, 3 - 6 May 2004, pp.133-140 - CERN library copies
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22.
Cycling of the PS complex and the SPS analysis and possibilities for optimisation / Benedikt, Michael ; Métral, G
Presently the lengths of the different cycles of all the PS-Complex proton accelerators are integer multiples of a so called “basic period” of 1.2 s duration. [...]
AB-Note-2004-061 ; CERN-AB-Note-2004-061.
- 2004.
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23.
Beam Commissioning of the SPS LSS 4 Extraction and the TT40 Transfer Line / Goddard, B ; Collier, Paul ; Lamont, M ; Mertens, V ; Sigerud, K ; Uythoven, J ; Wenninger, J
The new fast extraction system in LSS4 of the SPS and the transfer line TT40 were commissioned with beam in late 2003. The layout and functionality of the main elements are briefly explained, including the various hardware subsystems and the control system. [...]
CERN-AB-2004-036.- Geneva : CERN, 2004 - 4 p. Access to fulltext document: PDF; External link: Published version from JACoW
In : 9th European Particle Accelerator Conference, Lucerne, Switzerland, 5 - 9 Jul 2004, pp.569 - CERN library copies
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24.
Upgrade and Tests of the SPS Fast Extraction Kicker System for LHC and CNGS / Gaxiola, E ; Antoine, A ; Burkel, P ; Carlier, E ; Castronuovo, F ; Ducimetière, L ; Sillanoli, Y ; Timmins, M ; Uythoven, J
A fast extraction kicker system has been installed in the SPS and successfully used in extraction tests in 2003. [...]
CERN-AB-2004-037.
- 2004. - 4 p.
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25.
Beam Induced Heating of the SPS Fast Pulsed Magnets / Arduini, Gianluigi ; Bohl, T (CERN) ; Caspers, Friedhelm ; Gaxiola, E H ; Kroyer, T ; Timmins, M ; Vos, L ; Uythoven, J
Fast pulsed magnets with ferrite yokes are used in CERN's SPS accelerator for beam injection, extraction and excitation for tune measurements. The impedance of the ferrite structures can provoke significant beam induced heating, especially for beams with high peak currents as for LHC operation, even beyond the Curie temperature. [...]
CERN-AB-2004-038.- Geneva : CERN, 2004 - 4 p. Access to fulltext document: PDF; External link: Published version from JACoW
In : 9th European Particle Accelerator Conference, Lucerne, Switzerland, 5 - 9 Jul 2004, pp.623 - CERN library copies
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26.
Beam Quality Preservation in the CERN PS-SPS Complex / Arduini, Gianluigi
The LHC will require beams of unprecedented transverse and longitudinal brightness. Their production imposes tight constraints on the emittance growth in each element of the LHC injector chain, namely the PS-SPS Accelerator Complex. [...]
CERN-AB-2004-047.- Geneva : CERN, 2004 - Streaming video ; 6 transparencies. Talk Information Access to fulltext document: PDF; External links: Published version from JACoW; Talk 06 Jul 2004
In : 9th European Particle Accelerator Conference, Lucerne, Switzerland, 5 - 9 Jul 2004, pp.78 - CERN library copies
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27.
A Retrofit Technique for Kicker Beam-Coupling Impedance Reduction / Caspers, Friedhelm ; Gaxiola, E ; Kroyer, T ; Timmins, M ; Uythoven, J ; Kurennoy, S
The reduction of the impedance of operational ferrite kicker structures may be desirable in order to avoid rebuilding such a device. Often resistively coated ceramic plates or tubes are installed for this purpose but at the expense of available aperture. [...]
CERN-AB-2004-048.- Geneva : CERN, 2004 - 4 p. Access to fulltext document: PDF; External link: Published version from JACoW
In : 9th European Particle Accelerator Conference, Lucerne, Switzerland, 5 - 9 Jul 2004, pp.1144 - CERN library copies
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28.
Energy Loss of a Single Bunch in the CERN SPS / Bohl, T (CERN) ; Hofmann, A ; Linnecar, Trevor Paul R ; Shaposhnikova, Elena ; Tückmantel, Joachim
The dependence of energy loss on bunch length was determined experimentally for a single proton bunch in the SPS at 26 GeV/c. [...]
CERN-AB-2004-050.
- 2004. - 4 p.
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29.
Observation of a Fast Single-Bunch Transverse Instability on Protons in the SPS / Arduini, Gianluigi ; Benedetto, Elena ; Burkhardt, H ; Métral, Elias ; Rumolo, Giovanni
The longitudinal impedance of the SPS has been reduced significantly by hardware modifications over the last years and the threshold for longitudinal instabilities increased accordingly. We now observe a fast transverse instability on high-intensity single bunches of low longitudinal emittance. [...]
CERN-AB-2004-055.- Geneva : CERN, 2004 - 4 p. Access to fulltext document: PDF; External link: Published version from JACoW
In : 9th European Particle Accelerator Conference, Lucerne, Switzerland, 5 - 9 Jul 2004, pp.1843 - CERN library copies
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30.
Multiturn Extraction Based on Trapping in Stable Islands at CERN PS: Recent Measurement Advances / Cappi, R ; Gilardoni, S S ; Giovannozzi, Massimo ; Martini, M ; Métral, Elias ; Müller, A S ; Sakumi, A ; Steerenberg, R
Recently a novel approach to perform multi-turn extraction was proposed based on beam splitting in the transverse phase space by means of trapping inside stable islands. During the year 2002, preliminary measurements at the CERN Proton Synchrotron with a low-intensity, singlebunch, proton beam, confirmed the possibility of generating various beamlets starting from a single Gaussian beam. [...]
CERN-AB-2004-058.- Geneva : CERN, 2004 - Streaming video ; 4 transparencies. Talk Information Access to fulltext document: PDF; External links: Published version from JACoW; Talk 07 Jul 2004
In : 9th European Particle Accelerator Conference, Lucerne, Switzerland, 5 - 9 Jul 2004, pp.173 - CERN library copies
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31.
Nonlinear Dynamics Studies at the CERN Proton Synchrotron: Precise Measurements of Islands Parameters for the Novel Multi-Turn Extraction / Giovannozzi, Massimo ; Scaramuzzi, P
Recently, a novel approach to perform multi-turn extraction from a circular accelerator was proposed. It is based on adiabatic capture of particles into islands of transverse phase space generated by nonlinear resonances. [...]
CERN-AB-2004-059.- Geneva : CERN, 2004 - 4 p. Access to fulltext document: PDF; External link: Published version from JACoW
In : 9th European Particle Accelerator Conference, Lucerne, Switzerland, 5 - 9 Jul 2004, pp.1861 - CERN library copies
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32.
Study of a New Working Point for the CERN PS Booster / Benedikt, Michael ; Blas, A ; Carli, Christian ; Chanel, M ; Fiebiger, H ; Findlay, A ; Hanke, K ; Sanchez-Alvarez, J L ; Tan, J ; Urschütz, Peter
This paper reports on experiments with a new working point for the CERN PS Booster (PSB), performed during a dedicated machine development (MD) session following the 2003 run. [...]
AB-Note-2004-064 ; CERN-AB-Note-2004-064.
- 2004.
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33.
Intensity Dependent Emittance Transfer Studies at the CERN Proton Synchrotron / Métral, Elias ; Carli, Christian ; Giovannozzi, Massimo ; Martini, M ; Steerenberg, R ; Franchetti, Giuliano (GSI, Darmstadt) ; Hofmann, I ; Qiang, J ; Ryne, Robert D
An intensive study has been undertaken since the year 2002 to understand better the various high-intensity bottlenecks of the CERN Proton Synchrotron machine. One of these limitations comes from the so-called Montague resonance. [...]
CERN-AB-2004-070.- Geneva : CERN, 2004 - 4 p. Access to fulltext document: PDF; External link: Published version from JACoW
In : 9th European Particle Accelerator Conference, Lucerne, Switzerland, 5 - 9 Jul 2004, pp.1894 - CERN library copies
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34.
Simulation of Transient Beam-Feedback Interaction and Application to Extraction of CNGS Beam from the SPS / Vogel, E ; Höfle, Wolfgang
For present and future high energy proton accelerators, such as the LHC, transverse feedback systems play an essential role in supplying the physics experiments with high intensity beams at low emittances. We developed a simulation model to study the interaction between beam and transverse feedback system in detail, bunch-by-bunch and turn-by-turn, considering the real technical implementation of the latter. [...]
CERN-AB-2004-076.- Geneva : CERN, 2004 - 4 p. Access to fulltext document: PDF; External link: Published version from JACoW
In : 9th European Particle Accelerator Conference, Lucerne, Switzerland, 5 - 9 Jul 2004, pp.626 - CERN library copies
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35.
RF Amplitude Modulation to Suppress Longitudinal Coupled Bunch Instabilities in the SPS / Vogel, E ; Bohl, T (CERN) ; Wehrle, U
Without specific counter measures, the LHC type beam in the SPS suffers from longitudinal coupled bunch instabilities. To get rid of them, the SPS impedance has been decreased in the last years and the operation of a high frequency Landau damping system has been established. [...]
CERN-AB-2004-077.- Geneva : CERN, 2004 - 4 p. Access to fulltext document: PDF; External link: Published version from JACoW
In : 9th European Particle Accelerator Conference, Lucerne, Switzerland, 5 - 9 Jul 2004, pp.1924 - CERN library copies
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36.
Electron-Cloud Build-Up Simulations and Experiments at CERN / Arduini, Gianluigi ; Baglin, V ; Bohl, T (CERN) ; Jenninger, B ; Jiménez, M ; Laurent, Jean Michel ; Schulte, Daniel (CERN) ; Ruggiero, F ; Zimmermann, Frank (CERN)
We benchmark the predictions of electron-cloud buildup simulations against measurements at the CERN SPS. Specifically we compare the electron flux at the wall, electron-energy spectra, heat loads and the spatial distribution of the electrons for two different bunch spacings, with variable magnetic fields, and for several chamber temperatures and associated surface conditions. [...]
CERN-AB-2004-082.- Geneva : CERN, 2004 - 4 p. Access to fulltext document: PDF; External link: Published version from JACoW
In : 9th European Particle Accelerator Conference, Lucerne, Switzerland, 5 - 9 Jul 2004, pp.1933 - CERN library copies
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37.
Localizing Impedance Sources from Betatron-phase Beating in the CERN SPS / Arduini, Gianluigi ; Carli, Christian ; Zimmermann, Frank (CERN)
Multi-turn beam-position data recorded after beam excitation can be used to extract the betatron-phase advance between adjacent beam position monitors (BPMs) by a harmonic analysis. Performing this treatment for different beam intensities yields the change in phase advance with current. [...]
CERN-AB-2004-083.- Geneva : CERN, 2004 - 4 p. Access to fulltext document: PDF; External link: Published version from JACoW
In : 9th European Particle Accelerator Conference, Lucerne, Switzerland, 5 - 9 Jul 2004, pp.1939 - CERN library copies
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38.
Betatron Resonance Studies at the CERN PS Booster by Harmonic Analysis of Turn-by-turn Beam Position Data / Benedikt, Michael ; Carli, Christian ; Chanel, M ; Schmidt, F ; Urschütz, Peter
High brightness and high intensity beams are required from the PS Booster for LHC, CNGS and ISOLDE operation. [...]
CERN-AB-2004-085.
- 2004. - 4 p.
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39.
Measurement and Compensation of Second and Third Order Resonances at the CERN PS Booster / Urschütz, Peter
Space charge effects at injection are the most limiting factor for the production of high brightness beams in the CERN PS Booster. [...]
CERN-AB-2004-087.
- 2004. - 4 p.
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40.
Comparative Transverse Distribution Measurements between the New SPS Rest Gas Ionisation Monitor and the Wire Scanner Monitors / Fischer, C ; Dehning, Bernd (CERN) ; Koopman, J ; Kramer, Daniel ; Roncarolo, F
During the past two years, a new Ionization Profile Monitor was installed and tested in the CERN SPS. In parallel modifications were made on various wire scanner monitors. [...]
CERN-AB-2004-088.- Geneva : CERN, 2004 - 4 p. Access to fulltext document: PDF; External link: Published version from JACoW
In : 9th European Particle Accelerator Conference, Lucerne, Switzerland, 5 - 9 Jul 2004, pp.2478 - CERN library copies
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41.
Multiturn extraction based on trapping in stable islands / Giovannozzi, Massimo ; Cappi, R ; Gilardoni, S S ; Martini, M ; Métral, Elias ; Müller, A S ; Scaramuzzi, P ; Steerenberg, R
For some applications an intermediate extraction mode between fast (one turn) and slow (several thousand turns) is needed. This is the case of the five-turn extraction used to transfer the proton beam from the CERN Proton Synchrotron (PS) to the Super Proton Synchrotron (SPS). [...]
CERN-AB-2004-095.- Geneva : CERN, 2005 - 4 p. - Published in : AIP Conf. Proc. 773 (2005) 296-300 Access to fulltext document: PDF; External link: Published version from AIP
In : 33rd ICFA Advanced Beam Dynamics Workshop : High Intensity High Brightness Hadron Beams, Bensheim, Germany, 18 - 22 Oct 2004, pp.296-300 - CERN library copies
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42.
Post-mortem of the LTI project seen from AB/BDI / Jensen, L
The test of the new transfer line between SPS point 4 and LHC point 8 was an important milestone for the AB/BDI group. [...]
AB-Note-2004-079 ; CERN-AB-Note-2004-079.
- 2004.
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