EPAC08 - List of Keywords (hadron)

A B C D E F G H I K L M N O P Q R S T U V W

hadron

Paper	Title	Other Keywords	Page
TUPC130	Integration of CATIA/SMARTEAM into CERN's Corporate Engineering Data Management System	controls, collider, site	1374
	T. Hakulinen, C. Delamare, P.-O. Friman, T. Pettersson, E. Van Uytvinck, D. Widegren CERN, Geneva G. Fournier SPI Numérique, Lyon
	The document presents a short overview of the strategy defined to integrate the 3D CAD system CATIA/Smarteam into CERN’s corporate Engineering and Equipment Data Management System (EDMS). EDMS is used to manage the information about the Laboratory’s installations and technical infrastructure. A brief description of the existing EDMS architecture is given, describing the project life cycle management features available. The integration of CATIA/Smarteam into this backbone will offer the Organization an EDMS which can handle all technical information about a facility from its inception to its dismantling seamlessly. An overview of the Design Office requirements on the new CAD system is also presented.

TUPD033	Fabrication of Crystals for Channelling of Particles in Accelerators	collider, proton, collimation, background	1497
	A. Mazzolari, S. Baricordi, V. Guidi, G. Martinelli, D. Vincenzi UNIFE, Ferrara
	Channelling in bent crystals is used for beam extraction, focusing, collimation in accelerators machines, studies related to emission of coherent electromagnetic radiation and other topics. Distinctive features of performance increase is the availability of new techniques to manufacture the crystals within which channeling takes place. We propose a method to fabricate crystals through micromachining techniques, i.e., photolithography and anisotropic chemical etching. Patterning of a Si wafer with silicon nitride allows selective erosion of uncovered areas along specific atomic planes, resulting in a technique to dice Si wafers to the needed dimensions solely through chemical methods. Thus, it results in no damage to the crystal quality due to the dicing process. As was demonstrated by electron microscopy investigation, the crystal exhibits ultra flat lateral surfaces and simultaneously no amorphous layer at the entry face of the crystal with respect to the beam. The crystals were positively tested at the external line H8 of the SPS with 400 GeV protons for investigation on axial channeling and on single and multiple volume reflection experiments by the H8-RD22 collaboration.

WEOAG01	Prospects for a Large Hadron Electron Collider (LHeC) at the LHC	collider, luminosity, ion, lepton	1903
	M. Klein Liverpool University, Science Faculty, Liverpool H. Aksakal N. U, Nigde F. Bordry, H.-H. Braun, O. S. Brüning, H. Burkhardt, R. Garoby, J. M. Jowett, T. P.R. Linnecar, K. H. Mess, J. A. Osborne, L. Rinolfi, D. Schulte, R. Tomas, J. Tuckmantel, F. Zimmermann, A. de Roeck CERN, Geneva S. Chattopadhyay, J. B. Dainton Cockcroft Institute, Warrington, Cheshire A. K. Ciftci Ankara University, Faculty of Sciences, Tandogan/Ankara A. Eide EPFL, Lausanne B. J. Holzer DESY, Hamburg P. Newman Birmingham University, Birmingham E. Perez CEA, Gif-sur-Yvette S. Sultansoy TOBB ETU, Ankara A. Vivoli LAL, Orsay F. J. Willeke BNL, Upton, New York
	The LHeC collides a lepton beam with one of the intense, LHC, hadron beams. It achieves both e± interactions with quarks at the terascale, at eq masses in excess of 1 TeV, with a luminosity of about 10³³ cm^-2 s^-1, and it also enables a sub-femtoscopic probe of hadronic matter at unprecedented chromodynamic energy density, at Bjorken-x values down to 10^-6 in the deep inelastic scattering domain. The LHeC combines the LHC infrastructure with recent advances in radio-frequency, in linear acceleration and in other associated technologies, to enable two proposals for TeV ep collisions: a "ring-ring" option in which 7 TeV protons (and ions) collide with about 70 GeV electrons/positrons in a storage ring in the LHC tunnel and a "linac-ring" option based on an independent superconducting linear accelerator enabling single-pass collisions of electrons and positrons of up to about 140 GeV with an LHC hadron beam. Both options will be presented and compared. Steps are outlined for completing a Conceptual Design Review of the accelerator complex, beam delivery, luminosity, physics and implications for experiment, following declared support by ECFA and by CERN for a CDR.
	Slides

WEPP016	FEL-based Coherent Electron Cooling for High-energy Hadron Colliders	electron, collider, emittance, luminosity	2560
	V. Litvinenko BNL, Upton, Long Island, New York Y. S. Derbenev Jefferson Lab, Newport News, Virginia
	Cooling intense high-energy hadron beams remains a major challenge in modern accelerator physics. Synchrotron radiation of such beams is too feeble and two common methods, stochastic and electron cooling, are not efficient in providing significant cooling for high energy hadron, especially proton, colliders. In this paper we discuss a practical scheme of Coherent Electron Cooling, which promises short cooling times (below one hour) for intense proton beams in RHIC at 250 GeV or in LHC at 7 TeV. Coherent Electron Cooling was suggested early 1980s as a possibility for using various microwave instabilities in an electron beam to enhance its interaction with hadrons. The capabilities of present-day accelerator technology, ERLs, and high-gain Free-Electron Lasers (FELs), finally caught up with the idea and provided the all necessary ingredients for realizing such a process at energies typical for modern high energy hadron colliders. In this paper, we discuss the principles, the main limitations of this scheme and present some predictions for Coherent Electron Cooling in RHIC and the LHC operating with ions or protons. V. N. Litvinenko, Y. S. Derbenev, Proc. 29th Int. FEL Conference, Novosibirsk, August, 2007. **Y. S. Derbenev, Proc. of 7th All-Union Conf. on Charged Particle Accelerators, October 1980, Dubna, 269.

WEPP052	A Storage Ring Based Option for the LHeC	lepton, optics, proton, electron	2638
	F. J. Willeke BNL, Upton, New York F. Bordry, H.-H. Braun, O. S. Brüning, H. Burkhardt, J. M. Jowett, T. P.R. Linnecar, K. H. Mess, S. Myers, J. A. Osborne, F. Zimmermann CERN, Geneva S. Chattopadhyay Cockcroft Institute, Warrington, Cheshire J. B. Dainton, M. Klein Liverpool University, Science Faculty, Liverpool B. J. Holzer DESY, Hamburg
	The LHeC aims at the generation of Hadron-Lepton collisions with center of mass energies in the TeV scale and luminosities of the order of 10³³ cm^-2 sec^-1 by taking advantage of the existing LHC 7 TeV proton ring and adding a high energy electron accelerator. This paper presents technical considerations and potential parameter choices for such a machine and outlines some of the challenges arising when an electron storage ring based option, constructed within the existing infrastructure of the LHC, is chosen.

THPC085	VORPAL Simulations Relevant to Coherent Electron Cooling	electron, ion, plasma, simulation	3185
	G. I. Bell, D. L. Bruhwiler, A. V. Sobol Tech-X, Boulder, Colorado I. Ben-Zvi, V. Litvinenko BNL, Upton, Long Island, New York Y. S. Derbenev Jefferson Lab, Newport News, Virginia
	Coherent electron cooling (CEC)* combines the best features of electron cooling and stochastic cooling, via free-electron laser technology, to offer the possibility of cooling high-energy hadron beams with order-of-magnitude shorter cooling times. Many technical difficulties must be resolved via full-scale 3D simulations, before the CEC concept can be validated experimentally. VORPAL is the ideal code for simulating the “modulator” and “kicker” regions, where the electron and hadron beams will co-propagate as in a conventional electron cooling section. Unlike previous VORPAL simulations* of electron cooling physics, where dynamical friction on the ions was the key metric, it is the details of the electron density wake driven by each ion in the modulator section that must be understood, followed by strong amplification in the FEL. We present some initial simulation results. In particular, we compare the semi-analytic binary collision model with electrostatic particle-in-cell (PIC). Ya. S. Derbenev, COOL ’07 Proc. (2007). V. N. Litvinenko and Ya. S. Derbenev, FEL ’07 Proc. (2007). **A. V. Fedotov et al. Phys. Rev. ST/AB 9, 074401 (2006).

THPC145	Reliability Analysis of the LHC Machine Protection System: Terminology and Methodology	injection, simulation, beam-losses, diagnostics	3327
	S. Wagner Swiss Federal Institute of Technology Zurich (ETH), Laboratory for Safety Analysis, Zurich R. Schmidt, J. Wenninger CERN, Geneva
	The trade-off between LHC machine safety and beam availability is one of the main issues related to the LHC MPS. Several studies have addressed it for different subsystems. They are followed by a project aiming at the development of a methodology which combines agent-based modeling and fault-tree analysis thus allowing a global analysis of the entire MPS. During this project, the need for a clarification and specification of the terminology has become apparent. Besides involving basic terms like safety, reliability and availability, the analysis must take into account the implementation of common design principles such as redundancy, fault tolerance, 'fail-safe' and self-monitoring. These terms and in particular their interrelations easily cause confusion. Since the traceability of the analysis depends on a consistent understanding of the underlying terminology, a terminology frame is being compiled. The paper specifies the most relevant terms and their interrelations. General standard definitions are taken as basis for a specification related to the MPS and its analysis respectively. The developed analysis methodology building on this terminology frame is introduced.

THPP126	Four Quadrant 60 A, 8 V Power Converters for LHC	radiation, dipole, controls, feedback	3655
	L. Ceccone, V. Montabonnet CERN, Geneva
	The LHC (Large Hadron Collider) particle accelerator requires many true bipolar power converters (752), located under the accelerator dipole magnets in a radioactive environment. A special design and topology is required to obtain the necessary performance while meeting the criteria of radiation tolerance and compact size. This paper describes the ±60A ±8V power converter, designed by CERN to meet these requirements. Design aspects, performances and test results of this converter are presented.