EPAC08 - List of Keywords (site)

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Paper	Title	Other Keywords	Page
MOPC049	Comparative Study of Vibration Stability at Operating Light Source Facilities and Lessons Learned in Achieving NSLS II Stability Goals	ground-motion, lattice, storage-ring, electron	181
	N. Simos, M. Fallier BNL, Upton, Long Island, New York H. Amick Colin Gordon, Associates, San Bruno
	Understanding the correlation between storage ring vibration and electron beam oscillation is key in achieving the design beam parameters of a 3rd generation light source. Spectral properties of the vibration at the storage ring floor, in addition to amplitude, and its relation to the dynamic properties of the lattice govern the complex relation between lattice movement and beam jitter. Spectral characteristics are, in general, site-specific and motions exhibit spatial variability. To best describe the relationship between the ground motion field at the NSLS II site and the accelerator while quantifying the storage ring oscillations resulting from its interaction with the undisturbed site, field studies have been conducted at various light source facilities. By using the same metric data characterizing the achieved stability levels in operating light sources are generated and used in the assessment of the NSLS II stability which in turn linked to the specific site, subsurface and design characteristics. The paper summarizes the results of these comprehensive findings and presents an overall assessment of stability levels that can be achieved. Work performed under the auspices of the US DOE.

MOPC050	Ground Motion Studies at NSLS II	ground-motion, storage-ring, background, scattering	184
	N. Simos, M. Fallier BNL, Upton, Long Island, New York H. Amick Colin Gordon, Associates, San Bruno
	In 3rd generation light sources such as the 3 GeV NSLS II under design at BNL, strict requirements associated with vibration on the storage ring floor are imposed in order to minimize the jitter in the electron beam. Spectral characteristics storage ring vibration and dynamic properties of the ring lattice are controlling parameters. Ground motion at the NSLS-II site is characterized by a complex spectrum consisting of fast and slow motions stemming from natural and cultural sources. Cultural noise with frequencies higher than a few Hz has the potential of dramatically affecting the accelerator performance. In this study, an array of vibration measurements at the undisturbed NSLS II site has been made in order to establish the “green-field” vibration environment and its spectral characteristics. Its interaction with the NSLS II accelerator structure and the quantification of the storage ring vibration, both in terms of amplitude and spectral content have been assessed through a state-of-the-art wave propagation and scattering analysis. This paper focuses primarily on the wave propagation and scattering aspect as well as on the filtering effects of accelerator structural parameters. Work performed under the auspices of the US DOE.

MOPD002	Fabrication of ILC Prototype Cavities at Advanced Energy Systems, Inc.	controls, vacuum, target, cryogenics	448
	A. J. Favale, M. D. Cole, E. Peterson, J. Rathke AES, Medford, NY
	Advanced Energy Systems, Inc. has recently completed manufacture of four standard 9-cell TESLA-style ILC cavities, six single-cell ILC prototype cavities, six 9-cell symmetric ILC cavities, and one 9-cell re-entrant cavity of the Cornell design. This paper will present an overview of these fabrication projects and of the evolution of AES capability in cavity manufacturing. To date four of the 9-cell ILC cavities have been tested, the six single-cell cavities have been tested, and the 9-cell reentrant cavity has been tested. Preliminary results will be shown.

MOPD010	Design of XFEL facility in Harima	klystron, controls, undulator, heavy-ion	466
	T. Kato, M. Fuse, T. Imagawa, Y. Yamano Nikken Sekkei Ltd. S. Itakura, N. Kumagai, K. Oshima, T. Otsuka RIKEN/SPring-8, Hyogo
	The 700m-long 8 GeV XFEL that was launched by RIKEN is now under construction and will be operational in FY 2010. The strong point of the XFEL facility in Japan is compact under keeping high-performance by applying Spring-8 numerous breakthroughs in accelerator-driven light sources technology. In order to support the high-performance of XFEL, the building was designed with a few architectural ideas. In this paper we introduce the design of building foundation and ground so as to control the transformation of floor which the devices are fixed to, and the design of air conditioning so as to control the temperature change around the devices.

MOPD037	Safety Testing for LHC Access System	controls, simulation, monitoring, extraction	532
	F. Valentini, T. Ladzinski, P. Ninin, L. Scibile CERN, Geneva
	This paper presents the validation and verification activities carried out for the LHC Access Control and Safety System. It also presents a new strategy for the future that includes the application of formal methods based on model checking techniques, commonly used to prove the correctness of software algorithms or system functional specifications through automatic exploration of the system state space. We will show how to apply these techniques in order to automate the testing process. The paper also presents the results of the performances and the applicability of a series of tools that have been tested in order to carry out a formal correctness proof for the LHC Access System.

MOPP035	ILC Siting in Dubna Region (Russia) and ILC activity in JINR	collider, diagnostics, linear-collider, laser	622
	G. Shirkov, Ju. Boudagov, Yu. N. Denisov, I. N. Meshkov, A. N. Sissakian, G. V. Trubnikov JINR, Dubna, Moscow Region
	The report presents the development of investigations on ILC siting in the Dubna region and ILC technical activity at JINR. Russia is one of candidates now for ILC hosting in the Dubna region. International intergovernmental status of JINR, stable geological and plain relief conditions comfortable location, well developed infrastructure create powerful advantages of JINR among other possible sites. Shallow layout of tunnels and experimental halls could significantly reduce the cost of conventional facilities and siting. Besides JINR physicists take part in several fields of activity in ILC: works on photo injector prototype, participation in design and construction of cryomodules, laser metrology, etc.

MOPP115	Production and Qualification of Low Thermal Conduction Suspension Supports for the Cold Mass of Long Superconducting Acceleration Modules	cryogenics, radiation, simulation, controls	829
	S. Barbanotti, M. Bonezzi, M. Todero INFN/LASA, Segrate (MI) C. Engling, K. Jensch, R. Mattusch DESY, Hamburg
	A post is an assembly of a low thermal conduction composite material pipe (fiberglass pipe) and some shrink-fit aluminum and steel discs and rings, designed to provide a mechanical support and a thermal insulation to the cold mass of the long cryomodules of the TTF, which are foreseen also for the XFEL and ILC. We review here the production, testing and qualification for the production of post supports, which have been successfully provided for the cryomodules of the TTF in DESY, the STF in KEK and ILCTA in FNAL.

MOPP164	Improvements in Field Emission: A Statistical Model for Electropolished Baked Cavities	simulation, superconductivity	934
	J. L. Wiener, H. Padamsee Cornell University, Ithaca, New York
	A statistical model for field emission developed in 1993 has been applied to characterize the improvement in field emitter properties and field emitter occurrence due to improvements in treatment methods for 9-cell TESLA-style cavities. The improved treatments are electropolishing, high pressure rinsing and baking (120C, 48 hours). We model the Q vs. Eacc data from 24 9-cell tests and 32 1-cell tests, all conducted at TTF by DESY. The statistical model is able to successfully simulate the observed yields by applying a factor of 3 decrease in emitter density over the emitter density prevailing for treatments in 1993, which did not include high pressure rinsing. Both simulation and data show that at Eacc = 70 MV/m the yield for field emission power less than 100 watts (Q > 8x10⁹) is less than 20%. To raise this yield to 80% will require new treatments that will reduce the emitter density by another factor of 3 at least. Further comparisons of field emission behavior will be made with data for alcohol rinsed cavities.

MOPP165	FZJ Smallest SC Triple-Spoke Cavity	vacuum, coupling, cryogenics, simulation	937
	E. Zaplatin, W. Braeutigam, M. Pap, M. Skrobucha FZJ, Jülich P. Kneisel Jefferson Lab, Newport News, Virginia
	The paper describes the design, fabrication and test results of the smallest triple-spoke cavity (resonant frequency 760 MHz, β=0.2) developed at Forschungszentrum Juelich.

TUOCG03	Proposal for a ½ MW Electron Linac for Rare Isotope and Materials Science	proton, target, electron, linac	985
	S. R. Koscielniak, P. G. Bricault, B. Davids, J. Dilling, M. Dombsky TRIUMF, Vancouver D. Karlen Victoria University, Victoria, B. C.
	TRIUMF, in collaboration with university partners, proposes to construct a megawatt-class electron linear accelerator (e-linac) as a driver for U(gamma,f) of actinide targets with rates up to 10¹³ - 10¹⁴ fissions/sec and for (gamma,p)8Li for materials science. The particular emphasis would be on neutron-rich species. The 50 MeV, 10 mA, c.w. linac is based on super-conducting radio-frequency (SRF) technology at 1.3 GHz. Though high power/current electron linacs are a mature technology proposed elsewhere for applications ranging from 4th generation light-sources to TeV-scale linear colliders, TRIUMF is in the vanguard for applying this technology to the copious production of isotopes for studies of (i) nuclear structure and astrophysics; and (ii) beta-NMR for materials science.
	Slides

TUPC129	LHC Access System: from Design to Operation	controls, radiation, injection, monitoring	1371
	T. Pettersson, C. Delamare, S. Di Luca, S. Grau, T. Hakulinen, L. Hammouti, F. Havart, J.-F. Juget, T. Ladzinski, M. Munoz Codoceo, P. Ninin, R. Nunes CERN, Geneva
	The paper describes the LHC access control and safety system project, the system's architecture and the experience gathered of commissioning it. This system is made of two parts: the LHC Access Control System and the LHC Access Safety System. Using state of the art redundant, fail-safe PLC's and a supplementary, cabled control loop the LHC Access Safety System guarantees the safety of the personnel in all events. Using industrial components, the LHC Access Control System, regulates the access to the tunnels and experimental areas by identifying the users and checking their authorisations. It allows a remote or automatic operation of the access control equipment and restricts the number of users working simultaneously in the interlocked areas. A first implementation of the architecture is now in production and ensures that only authorized personnel can enter the controlled areas of the LHC complex and this only after permission has been given by the CERN Control Centre. The design, procurement and installation of the entire system took more than 4 years and the commissioning phase lasted about 12 months.

TUPC130	Integration of CATIA/SMARTEAM into CERN's Corporate Engineering Data Management System	controls, collider, hadron	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.

TUPC131	Micado - The Data Import Engine of the CERN Engineering and Equipment Data Management System		1377
	D. Widegren, T. Ladzinski, R. Lyzwa, S. Mallon Amerigo, S. Petit, B. Rousseau CERN, Geneva
	The CERN Engineering and Equipment Data Management System (EDMS) is one of the largest and most complex data management systems of its kind. For the last 10 years, it has received huge quantities of data generated in the different LHC project phases. Capturing all this information would not have been possible without a robust, failsafe, yet flexible and user-friendly data import engine. For this purpose the Micado toolkit was developed at CERN using XML standards, providing multi-level data verifications, an advanced queuing mechanism and batch processing of large amounts of import requests. Whereas Micado originally was developed to facilitate the capturing of LHC manufacturing data, its modular architecture has allowed a cost-effective extension to also cater for the LHC installation and hardware commissioning data import processes. Recently Micado has broadened its scope even further, including also imports of safety inspections, and at the same time the next generation of the tool providing Web Services is already being developed.

TUPP109	Meshless Solution of the Vlasov Equation Using a Low-discrepancy Sequence	synchrotron, simulation, controls, damping	1776
	R. L. Warnock SLAC, Menlo Park, California J. A. Ellison, K. A. Heinemann, G. Q. Zhang UNM, Albuquerque, New Mexico
	A successful method for solving the nonlinear Vlasov equation is the semi-Lagrangian method, in which the phase space density is represented by its values on a fixed Cartesian grid with interpolation to off-grid points. Integration for a time step consists of following orbits backward in time from initial conditions on the grid, with the collective force frozen during the time step. We ask whether it would be more efficient to use scattered data sites rather than grid points, namely sites from a low-discrepancy sequence as used in quasi - Monte Carlo integration. This requires a technique for interpolation of scattered data, and with such a technique in hand one can try either backward or forward orbits. Here we explore the forward choice, with the data sites themselves following forward orbits. We treat a problem well studied by the backward method, longitudinal motion in the SLAC damping rings. Over one or two synchrotron periods results are encouraging, in that the number of data sites can be reduced by a large factor. Over longer times it appears that the sites must be redistributed or changed in number from time to time, because of clustering.

WEPC008	Status of the SSRF Storage Ring	storage-ring, feedback, superconducting-RF, vacuum	1998
	Z. M. Dai, D. K. Liu, L. G. Liu, L. Yin, Z. T. Zhao SINAP, Shanghai
	The SSRF storage ring is composed of 20 DBA cells with energy of 3.5GeV and circumference of 432m. The installation of the SSRF storage ring was started on June 11, 2007, and finished in the beginning of Dec. 2007. The system tests of hardware and software for storage ring were completed in the middle of Dec. 2007. The commissioning of the storage ring started on Dec. 21, 2007, and the 100mA stored beam was achieved for the first time on Jan. 3, 2008. The design, installation and commissioning of the SSRF storage ring are described in this paper

WEPC029	Assessment of the Impact of External Stimuli on the Floor Stability of Diamond	survey, storage-ring, damping, monitoring	2049
	J. Kay, H. C. Huang Diamond, Oxfordshire R. Bartolini JAI, Oxford
	Continuous vibration monitoring is carried out and the stability of the Diamond floor slab has been assessed with regard to how it has responded to various external stimuli. Data has been collected on weather conditions and comparison made at extremes with floor vibration. The impact of a high level walkway bridge on the hall floor has also been assessed and there was a unique opportunity for an operational facility to measure the vibration response during a complete power black-out. The impact of local construction work is also presented.

WEPC052	Achieving Stability Requirements for Nanoprobe and Long Beam Lines at NSLS II. A Comprehensive Study	ground-motion, extraction, acceleration, brightness	2109
	N. Simos, L. Berman, A. J. Broadbent, K. Evans-Lutterodt, M. Fallier, J. Hill BNL, Upton, Long Island, New York
	Driven by beam stability requirements at the NSLS II synchrotron a comprehensive study has been launched seeking to provide assurances that nanometer level stability at critical x-ray beam-lines is achievable, given the vibration environment at the selected site. Through this effort which represents the integration of an array of field measurements and a state-of-the-art model of wave propagation, the stability of special NSLS II beam-lines that push the envelope of beam size is quantified. In particular, the effects of ground vibration at the NSLS II site are studied both deterministically and stochastically to account for the stochastic nature of the disturbances arriving at the site and interact with the ring and the experimental lines. Validated numerical models are utilized in an effort to guide the design of sensitive lines. The objective is to both minimize vibration amplification as well establish a relative stability envelope between the beam extraction and imaging locations of the sensitive NSLS II beam-lines.

WEPD040	Outcome of the Commissioning of the Readout and Actuation Channels for the Cryogenics of the LHC	controls, instrumentation, cryogenics, operational-performance	2500
	G. Fernandez Penacoba, C. Balle, J. Casas-Cubillos, J. De La Gama, P. Gomes, E. Gousiou, N. Jeanmonod, A. Lopez Lorente, E. Molina Marinas, A. Suraci, N. Vauthier CERN, Geneva
	The installation of the Large Hadron Collider (LHC) at CERN has been completed and its commissioning is now in progress. The LHC is the largest cryogenic installation ever built. It includes 1700 superconducting magnets, a cryogenic distribution line (QRL) running parallel to the accelerator, 52 electrical distribution feedboxes (DFB) supporting the superconducting current leads that supply power to the magnets circuits, and 16 superconducting RF accelerating cavities. For its operation more than 10 000 sensors and actuators are required. The commissioning of this instrumentation includes the validation of both hardware (installed sensors, cabling, front-end electronics, communication field-buses) and software (databases extraction, programmable logic controllers programs, supervision coherence). At present point, having provided the cryogenic instrumentation for the operation in half of the LHC, more than 95% of the channels are working within specifications. This paper presents the commissioning strategy, tracking policy, and performance results after commissioning of the cryogenic instrumentation for the LHC.

THXM01	CLIC Accelerating Structure Development	damping, collider, simulation, linac	2922
	W. Wuensch CERN, Geneva
	One of the most important objectives of the CLIC (Compact Linear Collider) study is to demonstrate the design accelerating gradient of 100 MV/m in a fully featured accelerating structure under nominal operating conditions including pulse length and breakdown rate. The development and testing program which has been put into place to achieve this objective is described. Recent advances in understanding and quantifying the effects which limit the accelerating gradient are presented.
	Slides

THPPGM03	EPS-AG 2008 Gersh Budker Prize Presentation: The Successful Construction and Commissioning of the Spallation Neutron Source	target, linac, proton, beam-transport	2960
	N. R. Holtkamp ITER, St Paul lez Durance N. R. Holtkamp ORNL, Oak Ridge, Tennessee
	The Spallation Neutron Source collaboration between six Department of Energy laboratories was a unique arrangement in its mission to build a large science facility, with equally distributed responsibility for design, construction, project management and budget. The Oak Ridge National Laboratory, with no previous experience in large accelerator construction, was selected as the project site, the team was recruited worldwide, and the management team was exchanged several times during the construction period. The constraints of such a collaboration, a new team having to work together on a complex project, facing demanding scientific and technical challenges, is a cocktail that can easily lead to failure, but also to success, as proven. Was it luck or good management that decided the fate of the project? Can the weakness of such a situation simultaneously become its strength? In hindsight, it is interesting to reflect on how it was done and what became of some of the key players. Certainly this experience in many ways provided the author with a key to face a much larger challenge, namely the management of an international science project shared between seven Countries, called ITER. A project that takes the concepts tried at SNS to another extreme. Comparisons will be provided and some of the unique features will be discussed.
	Slides