Measurements of heavy ion beam losses from collimation (2009)
Bruce, R., Assmann, R. W., Bellodi, G., Bracco, C., Braun, H. H., Gilardoni, S., ...
The collimation efficiency for Pb ion beams in the LHC is predicted to be lower than requirements. Nuclear fragmentation and electromagnetic dissociation in the primary collimators create fragments...
Generation of 1.5 Million Beam Loss Threshold Values (2008)
Holzer, E B, Bocian, D, Böhlen, T T, Dehning, B, Kramer, Daniel, Ponce, L, ...
CERN's Large Hadron Collider will store an unprecedented amount of energy in its circulating beams. Beamloss monitoring (BLM) is, therefore, critical for machine protection. It must protect against...
Development, Production and Testing of 4500 Beam Loss Monitors (2008)
Holzer, E B, Chiggiato, P, Dehning, B, Ferioli, G, Grishin, V, Jimenez, T M, ...
Beam-loss monitoring (BLM) [1] is a key element in the LHC machine protection. 4250 nitrogen filled ionization chambers (IC) and 350 secondary emission monitors (SEM) have been manufactured and...
Measurements of Heavy Ion Beam Losses from Collimation (2008)
Bruce, R, Assmann, Ralph Wolfgang, Bellodi, G, Bracco, C, Braun, H H, Gilardoni, S, ...
The collimation efficiency for $^{208}Pb^{82+}$ ion beams in the LHC is predicted to be lower than requirements. Nuclear fragmentation and electromagnetic dissociation in the primary collimators...
Schmidt, R, Assmann, Ralph Wolfgang, Carlier, E, Dehning, B, Denz, R, Goddard, B, ...
For nominal beam parameters at 7 TeV/c each of the two LHC proton beams has a stored energy of 362 MJ threatening to damage accelerator equipment in case of uncontrolled beam loss. The energy stored...
European Organization For Nuclear Research (2007)
Cern Ps Division, A. M. Lombardi, R. Scrivens, G. Franchetti, G. Franchetti, S. Gilardoni, ...
Experimental and theoretical activities are underway at CERN [1] with the aim of examining the feasibility of a very-high-flux neutrino source (10 neutrinos/year). In the present scheme, a high-power...
In the pion decay channel of a neutrino factory the particles are transported in a solenoidal magnetic field, a 1.8 T constant field in the CERN reference scenario. Increasing the field strength...
LHC Beam Loss Detector Design: Simulations and Measurements (2007)
Dehning, B, Effinger, E, Emery, J, Ferioli, G, Holzer, E B, Kramer, Daniel, ...
The Beam Loss Monitoring (BLM) system is integrated in the active equipment protection system of the LHC. It determines the number of particles lost from the primary hadron beam by measuring the...
The LHC Beam Loss Measurement System (2007)
Dehning, B, Effinger, E, Emery, J, Ferioli, G, Guaglio, G, Holzer, E B, ...
An unprecedented amount of energy will be stored in the circulating beams of LHC. The loss of even a very small fraction of a beam may induce a quench in the superconducting magnets or cause physical...
Beam Loss Response Measurements with a LHC Prototype Collimator in the SPS (2007)
Weiler, Th, Arduini, Gianluigi, Assmann, Ralph Wolfgang, Bracco, C, Braun, H, Dehning, B, ...
Beam tests with a Large Hadron Collider (LHC) prototype collimator were performed at the Super Proton Synchrotron (SPS) in autumn 2006. Applying a new collimator control system many new beam...
Classification of the LHC BLM Ionization Chamber (2007)
Stockner, M, Dehning, B, Fabjan, Christian Wolfgang, Holzer, E B, Kramer, Daniel
The LHC beam loss monitoring (BLM) system must prevent the super conducting magnets from quenching and protect the machine components from damage. The main monitor type is an ionization chamber....
The final collimation system for the LHC (2006)
Assmann, R W, Aberle, O, Bellodi, G, Bertarelli, A, Bracco, C, Braun, H, ...
The LHC collimation system has been re-designed over in order to address the unprecedented challenges that are faced with the 360 MJ beams at 7 TeV. The layout of the LHC has now been frozen and a...
Beam Loss Monitoring System for the LHC (2006)
Holzer, E B, Dehning, B, Effinger, E, Emery, J, Ferioli, G, González, J L, ...
One of the most critical elements for the protection of CERN's Large Hadron Collider (LHC) is its beam loss monitoring (BLM) system. It must prevent the superconducting magnets from quenching and...
Longitudinal Beam Loss Distribution along the LHC Ring (2004)
For the design and calibration of the LHC beam loss monitoring (BLM) system it is essential to have good predictions of the expected longitudinal loss distributions. For this purpose, a complete and...
Design of the Beam Loss Monitoring System for the LHC Ring (2004)
Holzer, E B, Dehning, Bernd, Effinger, E, Ferioli, G, González, J L, Gschwendtner, E, ...
The beam loss monitoring (BLM) system of the LHC is one of the most critical elements for the protection of the LHC. It must prevent the super conducting magnets from quenches and the machine...
An Improved Cllimation System for the LHC (2004)
Assmann, R W, Aberle, O, Bertarelli, A, Braun, H, Brugger, M, Brüning, Oliver Simon, ...
The handling of the high-intensity LHC beams in a super-conducting environment requires a high-robustness collimation system with unprecedented cleaning efficiency. For gap closures down to 2.2 mm no...
Figure of Merit for Muon Cooling: An Algorithm for Particle Counting in Coupled Phase Planes (2003)
A method to count particles in hyper-ellipsoidal phase space volumes was developed to be used as figure of merit for a muon cooling experiment and as a measure for the cooling performance of a...
High transverse mass pion and proton correlations in central PbPb collisions at 17GeV/nucleon (2003)
Bearden, I G, Bøggild, H, Boissevain, J G, Christiansen, P H L, Conin, L, Dodd, J, ...
For central PbPb collisions at a center of mass energy of 17.3 GeV/nucleon we have made the first two-dimensional measurement of the pp correlation function. These data extend the range of previous...
High transverse mass pion and proton correlations in central PbPb collisions at 17GeV/nucleon (2003)
Bearden, I G, Bøggild, H, Boissevain, J G, Christiansen, P H L, Conin, L, Dodd, J, ...
For central PbPb collisions at a center of mass energy of 17.3 GeV/nucleon we have made the first two-dimensional measurement of the pp correlation function. These data extend the range of previous...
Muon phase rotation and cooling: Simulation work at CERN (2002)
Franchetti, Giuliano, Gilardoni, S S, Hanke, K, Holzer, E B, Lombardi, A M, Migliorati, M, ...
We present simulation work performed at CERN and collaborating institutes concerning the muon front-end of a neutrino factory and a possible muon cooling experiment. The front-end in the CERN scheme...
Belochitskii, P, Bosser, Jacques, Caspers, Friedhelm, Chanel, M, Eriksson, T, Holzer, E B, ...
To provide efficient deceleration and to produce antiproton beam with the required characteristics two different cooler systems (stochastic and electron) are used in operation on the AD (Antiproton...
Two years of AD operation: Experience and progress (2002)
Belochitskii, P, Eriksson, T, Findlay, A, Holzer, E B, MacCaferri, R, Maury, S, ...
The antiproton decelerator (AD) has been running successfully for physics for the past two years. After the end of the commissioning period [1] that finished in 2000, the machine has gradually been...
Migliorati, M, Palumbo, L, Tazzioli, F, Vaccarezza, C, Hanke, K, Holzer, E B, ...
Muon cooling is one of the building blocks for a Neutrino Factory. It has the potential to increase the muon flux at the detector by an order of magnitude. Different set-ups for the experimental...
Beam Dynamics Study of a Muon Ionization Cooling Experiment (2002)
Aleksa, Martin, Amand, J F, Garoby, R, Gerigk, F, Hanke, K, Holzer, E B, ...
We present a summary of simulation results on a muon cooling experiment based on 88MHz cavities. The systems studied are subsections of the cooling channel in the CERN reference scheme for a neutrino...
Simulation of the Pion Decay Channel of a Neutrino Factory (2001)
In the pion decay channel of a neutrino factory the particles are transported in a solenoidal magnetic field, a 1.8 T constant field in the CERN reference scenario. Increasing the field strength...
Event Texture Search for Phase Transitions in Pb+Pb Collisions (2001)
Bearden, I G, Bearden, I G, Bøggild, H, Boissevain, J, Conin, L, Dood, J, ...
NA44 uses a 512 channel Si pad array covering $1.5
One and two dimensional analysis of 3$\pi$ correlations measured in Pb+Pb interactions (2001)
Bearden, I G, Bøggild, H, Boissevain, J G, Christiansen, P, Conin, L, Dodd, J, ...
$\pi^{-}\pi^{-}\pi^{-}$ correlations from Pb+Pb collisions at 158 GeV/c per nucleon are presented as measured by the focusing spectrometer of the NA44 experiment at CERN. The three-body effect is...
Event Texture Search for Critical Fluctuations in Pb+Pb Collisions (2001)
Kopytine, M L, Bearden, I G, Bøggild, H, Boissevain, J G, Conin, L, Dodd, J, ...
NA44 uses a 512 channel Si pad array covering $1.5
Phase Rotation, Cooling And Acceleration Of Muon Beams: a Comparison Of Different Approaches (2000)
Franchetti, Giuliano, Gilardoni, S S, Gruber, P, Hanke, K, Haseroth, H, Holzer, E B, ...
Experimental and theoretical activities are underway at CERN [1] with the aim of examining the feasibility of a very-high-flux neutrino source (»1021 neutrinos/year). In the present scheme, a...
Phase Rotation, Cooling And Acceleration Of Muon Beams: A Comparison Of Different Approaches (2000)
Franchetti, G., Gilardoni, S., Gruber, P., Hanke, K., Haseroth, H., Holzer, E. B., ...
Experimental and theoretical activities are underway at CERN with the aim of examining the feasibility of a very-high-flux neutrino source. In the present scheme, a high-power proton beam (some 4 MW)...
Strange Meson Enhancement in Pb-Pb Collisions (1999)
Bearden, I G, Bøggild, H, Boissevain, J G, Conin, L, Dodd, J, Erazmus, B, ...
The NA44 Collaboration has measured yields and differential distributions of K+, K-, pi+, pi- in transverse kinetic energy and rapidity, around the center-of-mass rapidity in 158 A GeV/c Pb+Pb...
Two-Proton Correlations near Midrapidity in $p+Pb$ and $S+Pb$ Collisions at the CERN SPS (1998)
Bøggild, H, Boissevain, J G, Conin, L, Dodd, J, Erazmus, B, Esumi, S C, ...
Correlations of two protons emitted near midrapidity in $p+Pb$ collisions at 450 GeV/$c$ and $S+Pb$ collisions at 200$A$ GeV/$c$ are presented, as measured by the NA44 Experiment. The correlation...
High energy Pb + Pb collisions viewed by pion interferometry (1998)
Bearden, I G, Bøggild, H, Boissevain, J G, Dodd, J, Erazmus, B, Esumi, S C, ...
Two-pion correlations from Pb+Pb collisions at 158 GeV/$c$ per nucleon are measured by the NA44 experiment at CERN. Multidimensional fits characterize the emission volume, which is found to be larger...
Wolf, K, Bearden, I G, Bøggild, H, Boissevain, J G, Dodd, J, Esumi, S C, ...
Experiment NA44 has measured proton and antiproton distributions at mid-rapidity in sulphur and proton collisions with nuclear targets at 200 and 450 GeV/c per nucleon respectively. The inverse...
Collective expansion in high energy heavy ion collisions (1996)
Bearden, I G, Bøggild, H, Boissevain, J G, Dodd, J, Erazmus, B, Esumi, S C, ...
Transverse mass spectra of pions, kaons, and protons from the symmetric heavy-ion collisions 200A$\cdot$GeV S+S and 158A$\cdot$GeV Pb+Pb, measured in the NA44 focusing spectrometer at CERN, are...
Mid-Rapidity Protons in 158A$\cdot$GeV Pb + Pb Collisions (1996)
Bearden, I G, Bøggild, H, Boissevain, J G, Dodd, J, Erazmus, B, Esumi, S C, ...
Proton distributions at mid-rapidity (2 $\le y \le$ 3) have been measured for 158A$\cdot$GeV Pb + Pb collisions in the focusing spectrometer experiment NA44 at CERN. From baryon number conservation...
Coulomb effect in single-particle distributions (1996)
Bøggild, H, Boissevain, J G, Dodd, J, Erazmus, B, Esumi, S C, Fabjan, Christian Wolfgang, ...
Single-particle distributions from heavy-ion collisions show the effect of Coulomb interactions on the final state. While a rather strong effect is seen in the ratio pi - / pi+ from central...