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1.
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Study of an ILC Main Linac that Follows the Earth Curvature
/ Eliasson, P ; Latina, A ; Poirier, F ; Schulte, Daniel ; Walker, N
In the base line configuration, the tunnel of the ILC will follow the earth curvature. The emittance growth in a curved main linac has been studied including static and dynamic imperfections. [...]
CERN-AB-2006-063; EUROTeV-Report-2006-050.-
Geneva : CERN, 2006 - 4 p.
Access to fulltext document: PDF; Fulltext: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.786
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2.
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High gradient tests of an 88 MHz RF cavity for muon cooling
/ Rossi, C ; Garoby, R ; Gerigk, F ; Marques-Balula, J ; Vretenar, M
The scheme for a Muon Cooling channel developed at CERN in the frame of Neutrino Factory studies foresees the use of 44 and 88 MHz cavities operating at a real-estate gradient as high as 4 MV/m. To assess the feasibility of this scheme, including high-gradient operation at relatively low frequency and the production and handling of high RF peak powers, a test stand was assembled at CERN. [...]
CERN-AB-2006-025.-
Geneva : CERN, 2006 - 4 p.
Access to fulltext document: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.1352
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4.
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Linac4, a New Injector for the CERN PS Booster
/ Garoby, R (CERN) ; Bellodi, G (CERN) ; Gerigk, F (CERN) ; Hanke, K (CERN) ; Lombardi, A (CERN) ; Pasini, M (CERN) ; Rossi, C (CERN) ; Sargsyan, E (CERN) ; Vretenar, M (CERN)
The first bottle-neck towards higher beam brightness in the LHC injector chain is due to space charge induced tune spread at injection into the CERN PS Booster (PSB). A new injector called Linac4 is proposed to remove this limitation. [...]
CERN-AB-2006-027; CARE-Conf-06-018-HIPPI; CARE-Conf-2006-018-HIPPI.-
Geneva : CERN, 2006 - 4 p.
Access to fulltext document: PDF; Fulltext: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.1624
3rd Indian Particle Accelerator Conference, Mumbai, India, 1 - 4 Nov 2006, pp.37-39
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9.
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Status of the Fatigue Studies on the CLIC Accelerating Structures
/ Calatroni, S (CERN) ; Heikkinen, Samuli Tapio (Helsinki University of Technology, Finland ; CERN) ; Neupert, H (CERN) ; Wuensch, Walter (CERN)
The need for high accelerating gradients for the future multi-TeV e+e- Compact Linear Collider (CLIC) imposes considerable constraints on the materials of the accelerating structures. The surfaces exposed to high pulsed RF (Radio Frequency) currents are subject to cyclic thermal stresses which are expected to induce surface break up by fatigue [...]
CERN-AB-2006-031; CLIC-Note-678.-
Geneva : CERN, 2006 - 4 p.
Fulltext: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.858
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11.
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Automatic conditioning of the CTF3 RF system
/ Deghaye, S (CERN) ; Dubrovsky, A (CERN) ; Livesley, S (CERN) ; Marques-Balula, J (CERN) ; Mourier, J (CERN) ; Nonglaton, J M (CERN) ; Sladen, Jonathan P H (CERN)
The RF system of CTF3 (CLIC Test Facility 3) includes ten 35 MW to 40 MW 3 GHz klystrons and one 20 MW 1.5 GHz klystron. High power RF conditioning of the waveguide network and cavities connected to each klystron can be extremely time consuming. [...]
CERN-AB-2006-033; CLIC-Note-691; CTF3-Note-086.-
Geneva : CERN, 2006 - 4 p.
Fulltext: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.1355
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13.
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A High-Gradient Test of a 30 GHz Molybdenum-Iris Structure
/ Wuensch, Walter (CERN) ; Aksakal, H (Univ. Ankara, Turkey) ; Braun, H (CERN) ; Carron, G (CERN) ; Corsini, R (CERN) ; Döbert, Steffen (CERN) ; Fandos, R (CERN) ; Grudiev, A (CERN) ; Jensen, E (CERN) ; Mete, Ö (Univ. Ankara, Turkey) et al.
The CLIC study is actively investigating a number of different materials in an effort to find ways to increase achievable accelerating gradient. So far a series of rf tests have been made with a set of identical-geometry structures: a W-iris 30 GHz structure, a Mo-iris 30 GHz structure (with pulses as long as 16 ns) and a scaled Mo-iris X-band structure [...]
CERN-AB-2006-035; CLIC-Note-680.-
Geneva : CERN, 2006 - 4 p.
Fulltext: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.801
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14.
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Progress on the CTF3 Test Beam Line
/ Döbert, Steffen (CERN) ; Rumolo, G (CERN) ; Schulte, Daniel (CERN) ; Syratchev, I V (CERN) ; Carrillo, D (CERN ; Madrid, CIEMAT)
In CLIC, the rf power to accelerate the main beam is produced by decelerating a drive beam. The Test Beam Line (TBL) of the CLIC Test Facility (CTF3) is designed to study and validate the drive beam stability during deceleration [...]
CERN-AB-2006-036; CLIC-Note-690; CTF3-Note-085.-
Geneva : CERN, 2006 - 4 p.
Fulltext: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.783
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15.
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Digital Low Level RF
/ Angoletta, Maria Elena
The demand on high stability and precision on the RF voltage for modern accelerators, as well as better diagnostics, maintenance and flexibility is driving the community to develop Digital Low Level RF systems (DLLRF) for both linear accelerators and synchrotrons. The state of the art in digital technologies applied to DLLRF systems is reviewed; different designs developed or in development at various laboratories are surveyed..
CERN-AB-2006-037.-
Geneva : CERN, 2006 - 6 p.
Access to fulltext document: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.1847
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16.
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Efficient Collimation and Machine Protection for the Compact Linear Collider
/ Assmann, R W (CERN) ; Zimmermann, Frank (CERN)
We present a new approach to machine protection and collimation in CLIC, separating these two functions: If emergency dumps in the linac protect the downstream beam line against drive-beam failures, the energy collimation only needs to clean the beam tails and can be compact. Overall, the length of the beam-delivery system (BDS) is significantly reduced..
CERN-AB-2006-038; CLIC-Note-667.-
Geneva : CERN, 2006 - 4 p.
Fulltext: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.768
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17.
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Resonance Trapping, Halo Formation and Incoherent Emittance Growth due to Electron Cloud
/ Benedetto, Elena ; Franchetti, Giuliano ; Rumolo, Giovanni (CERN) ; Zimmermann, Frank (CERN)
The pinched electron cloud introduces a tune shift along the bunch, which, together with synchrotron motion, leads to a periodic crossing of resonances. The resonances are excited by the longitudinal distribution of the electron cloud around the storage ring. [...]
CERN-AB-2006-039; CARE-Conf-06-031-HHH; CARE-Conf-2006-031-HHH.-
Geneva : CERN, 2006 - 4 p.
Access to fulltext document: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.2820
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18.
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Estimation of Decay Losses and Dynamic Vacuum for the Beta-beam Accelerator Chain
/ Benedikt, Michael (CERN) ; Fabich, Adrian (CERN) ; Kirk, Markus (GSI, Darmstadt) ; Omet, Carsten (GSI, Darmstadt) ; Spiller, Peter J (GSI, Darmstadt)
The beta-beam is based on the acceleration and storage of radioactive ions. Due to the large number of ions required and their relatively short lifetime, beam losses are a major concern. [...]
CERN-AB-2006-040; EURISOL-12-22-2006-0006; EURISOL-12-23-2006-0007; CERN-AB-2006-080.-
Geneva : CERN, 2006 - 4 p.
Access to fulltext document: ab-2006-040 - PDF; ab-2006-080 - PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.1696-1698
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19.
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Commissioning Status of the CTF3 Delay Loop
/ Alesini, D (CERN) ; Biscari, C (CERN) ; Buonomo, B (CERN) ; Corsini, R (CERN) ; Döbert, Steffen (CERN) ; Ghigo, A (CERN) ; Marcellini, F (CERN) ; Preger, B (CERN) ; Serio, M (CERN) ; Stella, A (CERN) et al.
The CLIC Test Facility CTF3, built at CERN by an international collaboration, aims at demonstrating the linear collider by 2010. In particular, one of the main goals is to study the generation of high-current electron pulses by interleaving bunch trains in delay lines and rings using transverse RF deflectors. [...]
CERN-AB-2006-041; CLIC-Note-675; CTF3-Note-073.-
Geneva : CERN, 2006 - 4 p.
Access to fulltext document: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.771
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21.
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Simulations of long-range beam-beam interaction and wire compensation with BBTrack
/ Dorda, U ; Zimmermann, Frank (CERN)
We present weak-strong simulation results for the effect of long-range beam-beam (LR-BB) interaction in LHC as well as for proposed wire compensation schemes or wire experiments, respectively. In particular, we discuss details of the simulation model, instability indicators, the effectiveness of compensation, the difference between nominal and PACMAN bunches for the LHC, beam experiments, and wire tolerances. [...]
CERN-AB-2006-043.-
Geneva : CERN, 2006 - 4 p.
Access to fulltext document: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.2245
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22.
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Luminosity Tuning at the Interaction Point
/ Eliasson, Peder (CERN) ; Korostelev, M S (CERN) ; Schulte, Daniel (CERN) ; Tomás, R (CERN) ; Zimmermann, Frank (CERN)
Minimisation of the emittance in a linear collider is not enough to achieve optimal performance. For optimisation of the luminosity, tuning of collision parameters such as angle, offset, waist, etc. [...]
CERN-AB-2006-044; CLIC-Note-669; EUROTEV-REPORT-2006-039.-
Geneva : CERN, 2006 - 3 p.
Fulltext: EUROTeV-Report-2006-039 - PDF; ab-2006-044 - PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.774
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23.
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Implementation of the proposed multi-turn extraction at the CERN Proton Synchrotron
/ Giovannozzi, Massimo (CERN)
Following the positive results of the three-year measurement campaign at the CERN Proton Synchrotron, concerning beam splitting with stable islands in the transverse phase space, a study of a possible implementation of the proposed Multi-Turn Extraction (MTE) was undertaken. The novel approach would allow a substantial reduction of beam losses, with respect to the present scheme, when delivering the high-intensity proton beams required for the planned CERN Neutrino to Gran Sasso Project (CNGS). [...]
CERN-AB-2006-045.-
Geneva : CERN, 2006 - 4 p.
Access to fulltext document: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.1789
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24.
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Measurement of Ion Beam Losses due to Bound-Free Pair Production in RHIC
/ Jowett, John M ; Bruce, R ; Drees, A ; Fischer, W ; Gilardoni, S S (CERN) ; Klein, S ; Tepikian, S
When the LHC operates as a Pb82+ ion collider, losses of Pb81+ ions, created through Bound-free Pair Production at the collision point, and localized in cold magnets, are expected to be a major luminosity limit. With Au79+ ions at RHIC, this effect is not a limitation because the Au78+ production rate is low, and the Au78+ beam produced is inside the momentum aperture. [...]
CERN-AB-2006-046.-
Geneva : CERN, 2006 - 4 p.
Access to fulltext document: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.553
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25.
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Hadron cancer therapy complex employing non-scaling FFAG accelerator and fixed field gantry design
/ Keil, Eberhard (CERN) ; Sessler, Andrew M (Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA) ; Trbojevic, D (Brookhaven National Laboratory, Upton, New York 11973, USA)
Non-scaling FFAG rings for cancer hadron therapy offer reduced physical aperture and large dynamic aperture as compared with scaling FFAGs. The variation of tune with energy implies the crossing of resonances during acceleration. [...]
CERN-AB-2006-047.-
Geneva : CERN, 2007 - 4 p.
APS Published version, local copy: PDF; Access to fulltext document: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.1681
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26.
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Recent Improvements of PLACET
/ Latina, Andrea (CERN) ; Burkhardt, Helmut (CERN) ; Eliasson, Peder (CERN) ; Neukermans, Helmut (CERN) ; Resta-López, Javier (IFIC, Valencia) ; Rumolo, Giovanni (CERN) ; Schulte, Daniel (CERN) ; Tomás, Daniel (CERN)
PLACET[1] is a program used to simulate the dynamics, including wakefields, of a beam in the main accelerating or decelerating part of a linac. It allows for the investigation of single- and multi-bunch effects, the simulation of normal RF cavities with relatively low group velocities, as well as transfer structures specific to CLIC. [...]
CERN-AB-2006-048; CLIC-Note-665; EUROTEV-REPORT-2006-030.-
Geneva : CERN, 2006 - 4 p.
Fulltext: EUROTeV-Report-2006-030 - PDF; ab-2006-048 - PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.2251
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28.
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A low energy accumulation stage for a beta-beam facility
/ Källberg, Anders (Siegbahn Inst. Phys., Stockholm) ; Simonsson, Ansgar (Siegbahn Inst. Phys., Stockholm) ; Lindroos, Mats (CERN)
The EU supported EURISOL Design Study encompasses a beta-beam facility for neutrino physics. Intense electron (anti-)neutrino beams are in such a machine generated through the decay of radioactive ions in a high energy storage ring. [...]
CERN-AB-2006-050; EURISOL-12-23-2006-0006.-
Geneva : CERN, 2006 - 4 p.
Access to fulltext document: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.1693
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29.
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Kicker impedance measurements for the future multiturn extraction of the CERN Proton Synchrotron
/ Métral, Elias (CERN) ; Caspers, Friedhelm (CERN) ; Giovannozzi, Massimo (CERN) ; Grudiev, Alexei (CERN) ; Kroyer, Tom (CERN) ; Sermeus, Luc (CERN)
In the context of the novel multi-turn extraction, where charged particles are trapped into stable islands in transverse phase space, the ejection of five beamlets will be performed by means of a set of three new kickers. Before installing them into the machine, a measurement campaign has been launched to evaluate the impedance of such devices. [...]
CERN-AB-2006-051.-
Geneva : CERN, 2006 - 4 p.
Access to fulltext document: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.2919
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31.
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The Fast Vertical Single-Bunch Instability after Injection into the CERN Super Proton Synchrotron
/ Métral, Elias (CERN) ; Arduini, Gianluigi (CERN) ; Bohl, Thomas (CERN) ; Burkhardt, Helmut (CERN) ; Rumolo, Giovanni (CERN) ; Spataro, Bruno (INFN/LNF Frascati)
Since 2003, high-intensity single-bunch proton beams with low longitudinal emittance have been affected by heavy losses after less than one synchrotron period after injection. The effects of the resonance frequency of the responsible impedance, longitudinal emittance and chromaticity on the intensity threshold were already discussed in detail in 2004, comparing analytical predictions with simulation results. [...]
CERN-AB-2006-053.-
Geneva : CERN, 2006 - 4 p.
Access to fulltext document: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.2913
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34.
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Expected signal for the TBID and the ionization chambers downstream of the CNGS target station
/ Sarchiapone, L ; Ferrari, A ; Gschwendtner, E ; Lorenzo-Sentis, M
Downstream of the carbon graphite target of the CNGS (CERN Neutrinos to Gran Sasso) facility at CERN a secondary emission monitor called TBID (Target Beam Instrumentation Downstream) is installed to measure the multiplicities and the left/right as well as up/down asymmetries of secondary particles from the target. Calculations show that the titanium windows used to close off the TBID vacuum tank might not withstand the highest beam intensities with small spot sizes expected at CNGS, in case the proton beam accidentally misses the 4-5 mm diameter target rods. [...]
CERN-AB-2006-056.-
Geneva : CERN, 2006 - 4 p.
Access to fulltext document: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.1208
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35.
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Design and Validation with Measurements of the LEIR Injection Line
/ Roncarolo, F ; Carli, C ; Chanel, M ; Dumas, L ; Scrivens, R
The CERN Low Energy Ion Ring (LEIR) commissioning started in the year 2005. O4+and Pb54+ion beams are transferred at 4.2 MeV/nucleon from Linac 3 to LEIR through a low energy transfer line, for which the constraints and the resulting optics design are presented. [...]
CERN-AB-2006-057.-
Geneva : CERN, 2006 - 4 p.
Access to fulltext document: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.2020
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36.
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Effects of Wake Fields in the CLIC BDS
/ Rumolo, Giovanni (CERN) ; Latina, Andrea (CERN) ; Schulte, Daniel
The wake fields due to collimators in the Beam Delivery System of CLIC are modeled using a conventional approach. According to the chosen ranges of parameters, differences in the transverse kicks due to both the geometric and resistive wall components for different regimes are highlighted (inductive or diffractive for the geometric wake fields, short- or long-range, ac or dc for the resistive wall wake fields). [...]
CERN-AB-2006-058; CLIC-Note-671; EUROTEV-REPORT-2006-026.-
Geneva : CERN, 2006 - 4 p.
Fulltext: EUROTeV-Report-2006-026 - PDF; ab-2006-058 - PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.780
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37.
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Estimation of the energy deposited on the CNGS magnetic horn and reflector
/ Sarchiapone, L ; Ferrari, A ; Lorenzo-Sentis, M
In the CNGS (Cern Neutrino to Gran Sasso) installation two magnetic lenses, namely the horn and the reflector, focus the secondary beam generated in the target station. The gap between the horn and reflector is chosen to optimize a wide-band high-energy muon-neutrino beam. [...]
CERN-AB-2006-059.-
Geneva : CERN, 2006 - 4 p.
Access to fulltext document: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.1813
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38.
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First observation of proton reflection from bent crystals
/ Scandale, Walter ; Ivanov, Yu M ; Petrunin, A ; Skorobogatov, V V ; Gavrikov, Yu A ; Zhelamkov, A V ; Lapina, L P ; Schetkovsky, A I ; Chesnokov, Yu A ; Baranov, V I et al.
We recently suggested using short bent crystals as primary collimators in a two stage cleaning system for hadron colliders, with the aim of providing larger impact parameters in the secondary bulk absorber, through coherent beam-halo deflection [1]. Tests with crystals a few mm long, performed with 70 GeV proton beams at IEHP in Protvino, showed a channeling efficiency exceeding 85 %. [...]
CERN-AT-2006-007-MAS.-
Geneva : CERN, 2006 - 4 p.
Access to fulltext document: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.1535
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39.
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Measurement and correction of the 3rd order resonance in the Tevatron
/ Alexahin, Yu I ; Lebedev, V ; Schmidt, F ; Still, D ; Valishev, A
At Fermilab Tevatron BPM system has been recently upgraded resulting in much better accuracy of beam position measurements and improvements of data acquisition for turn-by-turn measurements. That allows one to record the beam position at each turn for 8000 turns for all BPMs (118 in each plane) with accuracy of about 10-20 ìm. [...]
CERN-AB-2006-061.-
Geneva : CERN, 2006 - 4 p.
Access to fulltext document: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.2140
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40.
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MAD-X/PTC lattice design for DAPHNE at Frascati
/ Forest, Etienne (KEK, Ibaraki) ; Milardi, Catia (INFN/LNF, Frascati) ; Schmidt, Frank (CERN)
In absence of a program that takes as an input the desired or known location of the magnets in the tunnel, accelerator designers have been using MAD that looks at a ring as a sequence of magnets without a connection to the tunnel. In many simple examples that is just fine, but once more complicated structures are treated one is bound to play tricks with MAD. [...]
CERN-AB-2006-062.-
Geneva : CERN, 2006 - 4 p.
Access to fulltext document: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.631
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41.
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A Study of Failure Modes in the ILC Main Linac
/ Eliasson, Peder (CERN) ; Elsen, Eckhard (DESY) ; Krücker, Dirk (DESY) ; Latina, Andrea (CERN) ; Poirier, Freddy (DESY) ; Schulte, Daniel (CERN) ; Walker, Nicholas John (DESY) ; Xia, Guoxing (DESY)
Failures in the ILC can lead to beam loss or even damage the machine. In the paper quadrupole failures and errors in the klystron phase are being investigated and the impact on the machine protection is being considered for the main linac..
CERN-AB-2006-064; EUROTEV-REPORT-2006-040.-
Geneva : CERN, 2006 - 4 p.
Access to fulltext document: PDF; Fulltext: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.789
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42.
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CERN Proton Synchrotron working point control using an improved version of the pole-face-windings and figure-of-eight loop powering
/ Burnet, Jean Paul ; Giovannozzi, Massimo ; Métral, E ; Michels, O ; Steerenberg, R ; Vandorpe, B
The working point of the CERN Proton Synchrotron, which is equipped with combined function magnets, is controlled using pole-face-windings. Each main magnet consists of one focusing and one de-focusing half-unit on which four pole-face-winding plates are mounted containing two separate coils each, called narrow and wide. [...]
CERN-AB-2006-065.-
Geneva : CERN, 2006 - 4 p.
Access to fulltext document: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.264
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44.
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Beam Dynamics and First Operation of the Sub-Harmonic Bunching System in the CTF3 Injector
/ Urschütz, Peter (CERN) ; Braun, Hans Heinrich (CERN) ; Carron, G (CERN) ; Corsini, R (CERN) ; Döbert, Steffen (CERN) ; Lefèvre, T (CERN) ; McMonagle, G (CERN) ; Mourier, J (CERN) ; Sladen, Jonathan P H (CERN) ; Tecker, F A (CERN) et al.
The CLIC Test Facility 3 (CTF3), built at CERN by an international collaboration, aims at demonstrating the feasibility of the CLIC scheme by 2010. The CTF3 drive beam generation scheme relies on the use of a fast phase switch of a sub-harmonic bunching system in order to phase-code the bunches. [...]
CERN-AB-2006-067; CLIC-Note-683; CTF3-Note-075.-
Geneva : CERN, 2006 - 4 p.
Access to fulltext document: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.795
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45.
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High dynamic range beam profile measurements
/ Welsch, C P (CERN) ; Bravin, E (CERN) ; Burel, B (CERN) ; Chapman, T (CERN) ; Lefèvre, T (CERN) ; Pilon, M J (CERN)
In future high intensity, high energy accelerators, beam loss has to be minimized to maximize performance and reduce activation of accelerator components. It is imperative to have a clear understanding of the mechanisms that can lead to halo formation and to have the possibility to test available theoretical models with an adequate experimental setup. [...]
CERN-AB-2006-068; CLIC-Note-686; CTF3-Note-081.-
Geneva : CERN, 2006 - 4 p.
Fulltext: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.1217
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46.
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Time resolved spectrometry on the CLIC Test Facility 3
/ Lefèvre, T (CERN) ; Bal, C (CERN) ; Braun, H H (CERN) ; Bravin, E (CERN) ; Burger, S (CERN) ; Corsini, R (CERN) ; Döbert, Steffen (CERN) ; Dutriat, C (CERN) ; Tecker, F A (CERN) ; Urschütz, Peter (CERN) et al.
The high charge (>6ìC) electron beam produced in the CLIC Test Facility 3 (CTF3) is accelerated in fully beam loaded cavities. To be able to measure the resulting strong transient effects, the time evolution of the beam energy and its energy spread must be determined with at least 50MHz bandwidth. [...]
CERN-AB-2006-079; CLIC-Note-685; CTF3-Note-080.-
Geneva : CERN, 2006 - 4 p.
Fulltext: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.1205
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48.
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Ion Effects in the Damping Rings of ILC and CLIC
/ Zimmermann, Frank (CERN) ; Bruns, W (CERN) ; Schulte, Daniel (CERN)
We discuss ion trapping, rise time of fast beam-ion instability, and ion-induced incoherent tune shift for various incarnations of the ILC damping rings and for the CLIC damping ring, taking into account the different regions of each ring. Analytical calculations for ion trapping are compared with results from a new simulation code..
CERN-AB-2006-077; CLIC-Note-676.-
Geneva : CERN, 2006 - 4 p.
Fulltext: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.876
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49.
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Beam dynamics studies and emittance optimization in the CTF3 linac at CERN
/ Urschütz, Peter (CERN) ; Braun, Hans-Heinrich (CERN) ; Corsini, Roberto (CERN) ; Döbert, Steffen (CERN) ; Ferrari, Arnaud (UU/ISV, Uppsala) ; Tecker, Frank (CERN)
Small transverse beam emittances and well-known lattice functions are crucial for the 30 GHz power production in the Power Extraction and Transfer Structure (PETS) and for the commissioning of the Delay Loop of the CLIC Test Facility 3 (CTF3). Following beam dynamics simulation results, two additional solenoids were installed in the CTF3 injector in order to improve the emittance. [...]
CERN-AB-2006-076; CLIC-Note-682; CTF3-Note-074.-
Geneva : CERN, 2006 - 4 p.
Fulltext: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.798
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51.
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The PHIN photoinjector for the CTF3 Drive beam
/ Losito, R (CERN) ; Bienvenu,G (Chilbolton Observ.) ; Braun, H (CERN) ; Champault, N (CERN) ; Chevallay, E (CERN) ; Divall, M (Chilbolton Observ.) ; Fedosseev, V (CERN) ; Hirst, G (Chilbolton Observ.) ; Kumar, A (CERN) ; Kurdi, G (Chilbolton Observ.) et al.
A new photoinjector for the CTF3 drive beam has been designed and is now being constructed by a collaboration among LAL, CCLRC and CERN within PHIN, the second Joint Research Activity of CARE. The photoinjector will provide a train of 2332 pulses at 1.5 GHz with a complex timing structure (sub-trains of 212 pulses spaced from one another by 333 ps or 999 ps) to allow the frequency multiplication scheme, which is one of the features of CLIC, to be tested in CTF3. [...]
CERN-AB-2006-074; CLIC-Note-684; CTF3-Note-078; CARE-Conf-06-019-PHIN; CARE-Conf-2006-019-PHIN.-
Geneva : CERN, 2006 - 4 p.
Access to fulltext document: PDF; Fulltext: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.2517
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53.
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Correction of vertical dispersion and betatron coupling for the CLIC damping ring
/ Korostelev, M S (CERN) ; Zimmermann, Frank (CERN)
The sensitivity of the CLIC damping ring to various kinds of alignment errors has been studied. Without any correction, fairly small vertical misalignments of the quadrupoles and, in particular, the sextupoles, introduce unacceptable distortions of the closed orbit as well as intolerable spurious vertical dispersion and coupling due to the strong focusing optics of the damping ring. [...]
CERN-AB-2006-072; CLIC-Note-673.-
Geneva : CERN, 2006 - 4 p.
Fulltext: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.873
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54.
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Minimizing Emittance for the CLIC Damping Ring
/ Braun, H (CERN) ; Korostelev, M S (CERN) ; Levitchev, E (BINP, Novosibirsk, Russia) ; Piminov, P (BINP, Novosibirsk, Russia) ; Schulte, Daniel (CERN) ; Siniatkin, S (BINP, Novosibirsk, Russia) ; Vobly, P P (BINP, Novosibirsk, Russia) ; Zimmermann, Frank (CERN) ; Zolotarev, Konstantin V (BINP, Novosibirsk, Russia)
The CLIC damping rings aim at unprecedented small normalized equilibrium emittances of 3.3 nm vertical and 550 nm horizontal, for a bunch charge of 2.6·109 particles and an energy of 2.4 GeV. In this parameter regime the dominant emittance growth mechanism is intra-beam scattering. [...]
CERN-AB-2006-071; CLIC-Note-672.-
Geneva : CERN, 2006 - 4 p.
Fulltext: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.870
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55.
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Tune shift induced by nonlinear resistive wall wake field of flat collimator
/ Zimmermann, Frank (CERN) ; Arduini, Gianluigi ; Assmann, R W ; Burkhardt, H ; Caspers, Friedhelm ; Gasior, M ; Jones, R ; Kroyer, T ; Métral, E ; Redaelli, S et al.
We present formulae for the coherent and incoherent tune shifts due to the nonlinear resistive wall wake field for a single beam traveling between two parallel plates. In particular, we demonstrate that the nonlinear terms of the resistive-wall wake field become important if the gap between the plates is comparable to the transverse rms beam size. [...]
CERN-AB-2006-070.-
Geneva : CERN, 2006 - 4 p.
Access to fulltext document: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.2925
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