EPAC08 - List of Keywords (alignment)

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alignment

Paper	Title	Other Keywords	Page
MOPC006	Seeding of the Test FEL at MAX-lab	laser, electron, gun, linac	76
	N. Cutic, F. Curbis, F. Lindau, S. Thorin, S. Werin MAX-lab, Lund
	The test FEL at MAX-lab has recently been completed. The system will be seeded at 263 nm by a tripled Ti:sapphire laser synchronized to the RF system and the gun laser. Issues important for the seeding will be presented, ranging from the laser system via the layout of photon and electron optics to timing/synchronization and the theoretical approach. Experimental results on the seeding operation will also be presented.

MOPC011	Improvement and Recent Results of the DELTA Storage Ring FEL	laser, electron, undulator, storage-ring	88
	H. Huck, R. Burek, G. Schmidt, K. Wille DELTA, Dortmund
	Several modifications to the storage ring FEL at DELTA have been conducted, in order to enhance speed and reproducability of mirror alignment as well as flexibility of electron beam settings. We present the new hardware design and experimental results at a laser wavelength of 470 nm. Lasing was achieved with different filling patterns, and the output power of the FEL was measured. By modulating the accelerating RF the laser macropulses can be forced into a Q-switch mode, varying between roughly 10 and 250 Hz without significant loss of outcoupled average power. A special input optics setup for a streak camera enables simultaneous measurement of electron beam and laser pulse dynamics, to study the correlations between them. Recent measurements will be presented.

MOPC083	Flat Long Pulse Train Formation Using Multi-pass Structure	laser, insertion, polarization, gun	250
	J. Ruan, H. T. Edwards, R. P. Fliller Fermilab, Batavia, Illinois
	Flat long pulse train is part of the requirements for International Linear collider. Here in Fermilab the construction of ILCTA at New Meon Lab will present the similar requirements (3MHz, 2810 Pulses, 5Hz) for the laser systems. In this paper we will report the effort to develop a new multi pass (MP) cavity based on Nd:YLF crystal end-pumped by diode laser. It takes a seed (1054 nm, 4-5ps) from a commercial laser and has a gain of 1000 or more. So far we already tested up to 1000 pulses with 1μs spacing and the pulse train amplitude fluctuation is less than 5% throughout the whole duration. We attribute this to the high optical to optical conversion efficiency achieved using Nd:YLF crystal inside the multi-pass structure. Test with 3MHz spacing train is also discussed and the integration of the new MP cavity into the current laser system is planned.

MOPP001	Beam-Based Alignment for the CLIC Decelerator	quadrupole, simulation, lattice, dipole	547
	E. Adli, D. Schulte CERN, Geneva
	The CLIC Drive Beam decelerator requires the beam to be transported with very small losses. Beam-based alignment is necessary in order to achieve this, and various beam-based alignment schemes have been tested for the decelerator lattice. The decelerator beam has an energy spread of up to 90%, which impacts the performance of the alignment schemes. We have shown that Dispersion-Free-Steering works well for the decelerator lattice. However, because of the transverse focusing approach, modifications of the normal DFS schemes must be applied. Tune-up scenarios for the CLIC decelerator using beam-based alignment are also discussed.

MOPP022	Transatlantic Transport of Fermilab 3.9 GHZ Cryomodule for TTF/FLASH to DESY	acceleration, laser, survey, vacuum	592
	M. McGee, V. T. Bocean, J. Grimm, W. Schappert Fermilab, Batavia, Illinois
	In an exchange of technology agreement, Fermilab built and will deliver a 3.9 GHz (3rd harmonic) cryomodule to DESY to be installed in the TTF/FLASH beamline. This cryomodule delivery will involve a combination of flatbed air ride truck and commercial aircraft transport to Hamburg Germany. A description of the isolation and damping systems that maintain alignment during transport and protect fragile components is provided. Initially, transport and corresponding alignment stability studies were performed in order to assess the risk associated with transatlantic travel of a fully assembled cryomodule. Shock loads were applied to the cryomodule by using a coldmass mockup to prevent subjecting actual critical components (such as the cavities and input couplers) to excessive forces. Accumulative and peak shock loads were applied through over-the-road testing and using a pendulum hammer apparatus, respectively. Finite Element Analysis (FEA) studies were implemented to define location of instrumentation for transport studies and provide modal frequencies and shapes. Shock and vibration measurement results of transport studies and stabilization techniques are discussed.

MOPP028	Technical Specification for the CLIC Two-Beam Module	quadrupole, vacuum, linac, lattice	607
	G. Riddone, H. Mainaud Durand, D. Schulte, I. Syratchev, W. Wuensch, R. Zennaro CERN, Geneva R. Nousiainen HIP, University of Helsinki A. Samoshkin JINR, Dubna, Moscow Region
	The 2-m long CLIC module comprises four decelerating structures and two quadrupoles forming a FODO cell. Each decelerating structure powers two accelerating structures. Some accelerating structures are removed at regular intervals to liberate space for a quadrupole of a FODO lattice. The present layout of the standard and special modules is presented as well as the status of the system integration. The main requirements for the different sub-systems (alignment, supporting, stabilization, cooling and vacuum) are introduced together with the major integration constraints. For the key components the specification on pre-alignment and beam-based alignment tolerances is also recalled as well as their influence on the requirements of other sub-systems. For example the required stable thermal behavior and the tight tolerances of accelerating structure (the requirements for the accelerating structure pre-alignment is 0.014 mm at 1? ) in the CLIC linac largely directly the sizing and integration of the cooling system. The paper also covers the main issues related to the module integration in the tunnel. In the last part, the critical issues and future activities are summarized.

MOPP031	Challenges and Concepts for Design of an Interaction Region with Push-pull Arrangement of Detectors - an Interface Document	shielding, interaction-region, radiation, collider	616
	A. Seryi, T. W. Markiewicz, M. Oriunno, M. K. Sullivan SLAC, Menlo Park, California D. Angal-Kalinin STFC/DL/ASTeC, Daresbury, Warrington, Cheshire B. Ashmanskas, V. R. Kuchler, N. V. Mokhov Fermilab, Batavia, Illinois K. Buesser DESY, Hamburg P. Burrows OXFORDphysics, Oxford, Oxon A. Enomoto, Y. Sugimoto, T. Tauchi, K. Tsuchiya KEK, Ibaraki A. Herve, J. A. Osborne CERN, Geneva A. A. Mikhailichenko Cornell University, Department of Physics, Ithaca, New York B. Parker BNL, Upton, Long Island, New York T. Sanuki Tohoku University, School of Scinece, Sendai J. Weisend NSF, Arlington H. Y. Yamamoto Tohoku University, Sendai
	Two experimental detectors working in a push-pull mode has been considered for the Interaction Region of the International Linear Collider [1]. The push-pull mode of operation sets specific requirements and challenges for many systems of detector and machine, in particular for the IR magnets, for the cryogenics system, for alignment system, for beamline shielding, for detector design and overall integration, and so on. These challenges and the identified conceptual solutions discussed in the paper intend to form a draft of the Interface Document which will be developed further in the nearest future. The authors of the present paper include the organizers and conveners of working groups of the workshop on engineering design of interaction region IRENG07 [2], the leaders of the IR Integration within Global Design Effort Beam Delivery System, and the representatives from each detector concept submitting the Letters Of Intent.

MOPP037	Alignment of the CLIC BDS	multipole, simulation, luminosity, radiation	628
	A. Latina, D. Schulte, R. Tomas CERN, Geneva
	Aligning the CLIC Beam Delivery System faces two major challenges, the tight tolerances for the emittance preservation and its strong non-linear beam dynamics. For these reasons conventional beam-based alignment techniques, like dispersion free steering, are only partially successful and need to be followed by optimization algorithms based on other observables, like beam sizes.

MOPP042	RF Kick in the ILC Acceleration Structure	emittance, linac, acceleration, focusing	637
	V. P. Yakovlev, I. G. Gonin, A. Latina, A. Lunin, K. Ranjan, N. Solyak Fermilab, Batavia, Illinois
	Detailed results of estimations and simulations for the RF kick caused by input and HOM couplers of the ILC acceleration structure are presented. Results of possible beam emittance dilution caused by RF kick are discussed for the main LINAC acceleration structure, and the RF structures of the ILC bunch compressors BC1 and BC2. Methods of the RF kick reduction are discussed.

MOPP081	Engineering Design of a PETS Tank Prototype for CTF3 Test Beam Line	vacuum, beam-losses, controls, damping	739
	D. Carrillo, L. García-Tabarés, J. L. Gutierrez, I. Rodriguez, E. Rodríguez García, S. Sanz, F. Toral CIEMAT, Madrid G. Arnau-Izquierdo, N. C. Chritin, S. Doebert, G. Riddone, I. Syratchev, M. Taborelli CERN, Geneva J. Calero CEDEX, Madrid
	In the CLIC concept, PETS (Power Extraction and Transfer Structure) role is to decelerate the drive beam and transfer RF power to the main beam. One of the CTF3 test beam line (TBL) aims is to study the decelerated beam stability and evaluate PETS performance. The PETS core is made of eight 800 mm long copper rods, with very tight tolerances for shape (± 20 micron), roughness (less than 0.4 micron) and alignment (± 0.1 mm). Indeed, they are the most challenging components of the tank. This paper reports about the methods of fabrication and control quality of these bars. A special test bench has been designed and manufactured to check the rod geometry by measuring the RF fields with an electric probe. Other parts of the PETS tank are the power extractor, the waveguides and the vacuum tank itself. Industry is partially involved in the prototype development, as the series production consists of 15 additional units, and some concepts could be even applicable to series production of CLIC modules

MOPP114	Design of the Prototypical Cryomodule for the EUROTRANS Superconducting Linac for Nuclear Waste Transmutation	cryogenics, linac, vacuum, radiation	826
	S. Barbanotti, N. Panzeri, P. Pierini INFN/LASA, Segrate (MI) J.-L. Biarrotte, P. Blache, C. Commeaux, P. Duthil, E. Rampnoux IPN, Orsay M. Souli GANIL, Caen
	One task of the accelerator workpackage of the EUROTRANS program for the design of a nuclear waste transmutation system is dedicated to the engineering and realization of a prototype cryomodule of the high energy section of the linac, equipped with elliptical superconducting niobium cavities. We review here the present status of the design and the planned program that foresees the experimental characterization of the fully equipped cavity and RF system under its nominal operating conditions.

MOPP123	Design and Fabrication of the Cornell ERL Injector Cryomodule	vacuum, linac, insertion, shielding	844
	E. P. Chojnacki, S. A. Belomestnykh, Z. A. Conway, J. J. Kaufman, M. Liepe, V. Medjidzade, D. Meidlinger, H. Padamsee, P. Quigley, J. Sears, V. D. Shemelin, V. Veshcherevich CLASSE, Ithaca
	The Energy Recovery Linac (ERL) development effort at Cornell will first produce an ERL beam source. The source will consist of a DC photo-gun, a buncher cavity, beam optics, and then an SRF Injector cryomodule to accelerate the 33-100 mA cw beam from 0.3-0.5 MeV to 5-15 MeV. The Injector cryomodule is based on TTF III technology with modifications to allow cw operation and the flexibility to accommodate the wide range of beam currents, bunch lengths, and beam energy. To deliver the 0.5 MWCW average power to the beam, the Injector cryomodule will contain five SRF 2-cell cavities, each cavity having two 50 kWCW coax couplers to deliver power from 100 kWCW klystrons, of which there are five for the Injector. Both the couplers and klystrons have been tested with 30% overhead in performance. Cold beamline HOM loads are placed between each cavity and outboard of the first and last cavities. Details of the Injector cryomodule design will be presented along with insight gained from the fabrication process, which will benefit the future ERL Linac cryomodule design and proto-typing.

MOPP135	Vertical and Horizontal Test Results of 3.9 GHz Accelerating Cavities at FNAL	electron, resonance, pick-up, instrumentation	874
	T. N. Khabiboulline, H. T. Edwards, M. H. Foley, E. R. Harms, A. Hocker, D. V. Mitchell, A. M. Rowe, N. Solyak Fermilab, Batavia, Illinois
	The 3rd harmonic 3.9GHz accelerating cavity was proposed to improve the beam performance of the electron/positron linear accelerators. In the frame of a collaborative agreement, Fermilab will provide DESY with a cryomodule containing a string of four cavities. Several 9-cell Nb cavities were tested and they did reach accelerating gradient up to 24 MV/m almost twice more than design value of 14 MV/m. Two of these cavities are with new HOM couplers with improved design. In this paper we present all results of the vertical and horizontal tests.

MOPP138	First Test Results from the Cornell ERL Injector Cryomodule	emittance, linac, acceleration, booster	883
	M. Liepe, S. A. Belomestnykh, E. P. Chojnacki, Z. A. Conway, R. Ehrlich, R. P.K. Kaplan, V. Medjidzade, H. Padamsee, P. Quigley, J. J. Reilly, D. M. Sabol, J. Sears, V. D. Shemelin, E. N. Smith, V. Veshcherevich, D. Widger CLASSE, Ithaca
	Cornell University has developed and fabricated a 5 cavity SRF injector cryomodule for the acceleration of a high current (100 mA), ultra low emittance beam. This cryomodule has been installed in the Cornell ERL prototype, and is presently under extensive test. The combination of a high beam current with emittance preservation of an ultra low emittance beam results in a multitude of challenges for the SRF system, pushing parameters well beyond present state of the art. Strong HOM damping and effective HOM power extraction is required to support the 100 mA beam current. This is achieved by placing HOM beam line absorbers between all cavities. Emittance preservation is addressed by a symmetric beam line with twin input couplers, tight cavity alignment and the option of fine alignment of cold cavities. In this paper we report on first results from the injector module test, including cavity performance tests, static heat load measurements and microphonic studies.

TUPC009	Vertical Beam Profile Measurement and Analysis with X-ray Pinhole	emittance, dipole, synchrotron, lattice	1059
	M. J. Boland, M. J. Spencer ASP, Clayton, Victoria
	Imaging the electron beam profile at a synchrotron light source is commonly performed in the x-ray regime using a pinhole camera system. However, with machines pushing down the vertical emittance, including errors in source point optical parameters, pinhole manufacturing limitations and error analysis difficulties associated with diffraction and image capture, the pinhole imaging system has large errors, up to 50% for an emittance of a few picometre. An analysis has been done at the Australian Synchrotron (AS) looking at the effects of errors in determining the x-ray pinhole source point parameters.

TUPC116	Field Characterization of XFEL Quadrupole Magnets	quadrupole, electron, laser, controls	1338
	A. Hedqvist, H. Danared, F. Hellberg MSL, Stockholm J. Pflueger DESY, Hamburg
	The European X-ray free electron laser (XFEL) will be one of the most advanced light source facilities in Europe and produce high intensity laser light of wavelengths down to 0.1 nm. The laser light is produced and amplified by electrons moving through long undulator systems, each consisting of several 5 m long segments. After each undulator segment an adjustable quadrupole magnet is placed to focus the electron beam. For optimum control of the laser light the centre of the quadrupoles need to be positioned along a straight line with an accuracy of 0.001 mm which only can be reached by beam based alignment (BBA). Prior to the BBA procedure the magnets need to be aligned along the beam path, therefore the centre position of the magnet has to be determined relative to fiducials placed on the magnet body with an accuracy of approximately 0.01 mm. A rotating coil system has been set up at the Manne Siegbahn Laboratory to characterize the magnetic field between the four magnetic poles and to measure the stability of the magnetic centre. The accuracy of this instrument and procedures of how to fiducialize the magnetic centre are presented. European XFEL technical design report, edited by M. Altarelli et. al., DESY 2006.

TUPC117	Beam Based Alignment of Quadrupole Triplets by Use of MATLAB Based Modeling	quadrupole, storage-ring, survey, optics	1341
	O. Kopitetzki, D. Schirmer, G. Schmidt, K. Wille DELTA, Dortmund
	A new beam based method is introduced to measure the transversal shifts of quadrupole magnets in relation to each other within triplet structures. The displacements of the quadrupole magnets can be calculated by quadrupole strength variation in combination with a simulation of the orbit distortions utilizing a MATLAB based model for beam optics. A local smoothing of the quadrupole alignment can be achieved with accuracy better than those of geodetic surveys. Results are presented and compared with data from geodetic surveys.

TUPC118	First Data from the Linear Collider Alignment and Survey Project (LiCAS)	survey, laser, linear-collider, collider	1344
	A. Reichold, T. Handford, L. A. Rainbow, M. Tacon, C. Uribe Estrada, D. Urner, S. Q. Yang OXFORDphysics, Oxford, Oxon P. J. Brockill, S. Cohen, J. Dale, M. Dawson, M. Jones, G. Moss, R. Wastie JAI, Oxford G. Grzelak Warsaw University, Warsaw J. Prenting, M. Schloesser DESY, Hamburg
	The LiCAS project has developed a prototype robotic survey system for rapid and highly accurate surveying of long linear accelerator tunnel networks. It is aimed at the survey of the reference network for the International Linear Collider (ILC). This Rapid Tunnel Reference Surveyor (RTRS) is designed to be an R\&D instrument for evaluating the potential performance of the RTRS concept and its survey technology. The prototype has been commissioned in a test tunnel at DESY with initial calibrations and measurements ongoing. We will report on the results obtained so far and present conclusions for the design of an RTRS suitable for the ILC.

TUPC121	Nanometre Precision Interferometric Stability Monitoring Systems for Key Accelerator Components	laser, quadrupole, monitoring, linear-collider	1350
	P. A. Coe, A. Reichold, D. Urner OXFORDphysics, Oxford, Oxon M. S. Warden JAI, Oxford
	The MONALISA group develops novel, accurate, nanometre resolution, interferometric systems to monitor relative motions between key accelerator components. We use cost-effective technology developed for the telecommunications market, providing readily scalable, adaptable solutions. Key magnets and diagnostics in the beam-delivery section of the International Linear Collider (ILC) will need to maintain stable relative positions. In particular, the final focus quadrupole magnets require nanometre level stability. Even greater stability requirements will be placed on components for the Compact Linear Accelerator (CLIC). Interferometers provide the only means of monitoring relative positions over long timescales, at the nanometre and sub-nanometre level. We are working to improve our measurement resolution using an optical frequency reference obtained by locking the second harmonic of an ultra-narrow linewidth 1560 nm fibre laser to a D2 transition in Rubidium-87. The latest results from this system tested on novel design, fibre-coupled, evacuated interferometers will be presented.

TUPC150	Ensemble Cavity Control System Simulation Using Pulse-to-pulse Calibration	coupling, controls, simulation, klystron	1422
	C. Serrano, L. R. Doolittle, A. Ratti, A. Vaccaro LBNL, Berkeley, California
	For cost reasons one klystron will supply RF power to multiple cavities in recent projects. Individual cavity field stability and optimal drive needs to be achieved considering beam propagation, cavity tuning, cavity coupling, and cable lengths. External environmental factors continuously modify physical properties of the accelerating structures and waveguides. Therefore a calibration system has been designed to adapt individual drive signals and vector-sum alignment in a pulse-to-pulse basis. An eight-cavity model and a calibration system have been tested in simulation using the hardware-software simulation tool developed at LBNL.

TUPD020	Remote Alignment of Low Beta Quadrupoles with Micrometric Resolution	radiation, quadrupole, controls, survey	1470
	M. Acar, J. Boerez, A. Herty, H. Mainaud Durand, A. Marin, J.-P. Quesnel CERN, Geneva
	Considering their location in a high radiation environment and the alignment tolerances requested, the Low Beta quadrupoles of LHC will be positioned remotely (controlling 5 degrees of freedom), with a displacement resolution of few microns in horizontal and vertical. Stepping motor gearbox assemblies are plugged into the jacks which support the cryomagnets in order to move them to the desired position regarding the quality of the beam collisions in the detectors. This displacement will be monitored in real time by the sensors located on the magnets. This paper describes the positioning strategy implemented as well as the software tools used to manage it.

TUPD032	RFQ Vacuum Brazing at CERN	vacuum, rfq, linac, radio-frequency	1494
	S. J. Mathot CERN, Geneva
	The aim of this paper is to describe the vacuum brazing procedure used at CERN for the brazing of Radio Frequency Quadrupole (RFQ). The RFQ is made of high precision machined OFE copper pieces assembled together. Vacuum brazing is one of the most promising techniques used to join the individual components leading to vacuum tightness and high precision alignment. The RFQ's brazed at CERN are made of four 100 or 120 cm long vanes (two majors and two minor vanes). Our brazing procedure consists of two steps. The first step involves the brazing of the four vanes in a horizontal position. The second step consists of brazing the vacuum stainless steel flanges to the copper structure in a vertical position. The paper describes the problems encountered with the alignment and the vacuum tightness. The difficulties related to the stress relaxation of the machined copper pieces during the brazing heat treatment are discussed. In addition, the solutions developed to improve the alignment of the brazed RFQ's are also presented.

TUPD035	Modeling of the RF-shield Sliding Contact Fingers for the LHC Cryogenic Beam Vacuum Interconnects Using Implicit and Explicit Finite Element Formulations	vacuum, simulation, superconducting-magnet, shielding	1503
	D. Ramos CERN, Geneva
	The short interconnect length between the LHC superconducting magnets required the development of an optimised RF shielded bellows module, with a low impedance combined with compensation for large thermal displacements and alignment lateral offsets. Each bellows is shielded by slender copper-beryllium fingers working as pre-loaded beams in order to provide a constant force at the sliding contact. Unless the sliding friction and some geometrical parameters of the fingers are kept within a limited range, a large irreversible lateral deflection towards the vacuum chamber axis may occur and eventually block the beam aperture. The finite element analysis presented here simulates this failure mechanism providing a complete understanding of the finger behavior as well as the influence of the various design parameters. An implicit non-linear two-dimensional model integrating friction on the sliding contacts, geometrical non-linearity and plasticity was implemented in a first stage. The design was then verified through the whole working range using an explicit formulation, which overcame the instabilities resulting from the sudden release of internal energy stored in the finger.

TUPD040	Design, Manufacturing and Tests of a Micrometer Precision Mover for CTF3 Quadrupoles	quadrupole, controls, emittance, beam-losses	1517
	F. Toral, C. Burgos, D. Carrillo, L. García-Tabarés, J. L. Gutierrez, I. Rodriguez, E. Rodríguez García, S. Sanz, C. Vazquez CIEMAT, Madrid E. Adli, N. C. Chritin, S. Doebert, J. A. Rodriguez CERN, Geneva J. Calero CEDEX, Madrid
	A new remotely controlled moving table has been designed for the quadrupoles of the CTF3 Test Beam Line, as part of the beam based alignment system. This device must provide both vertical and horizontal (transverse to the beam) movements. The specifications request a reproducibility of ± 5 micron, with a resolution of 1 micron and a stroke of ± 4 mm. Due to the weight of the magnet, about 50 kg, and the space restrictions, a solution based on small stepping motors with integrated linear spindles has been chosen. The motor responsible of the vertical movement rests on a wedge, with a double purpose: to make the design more compact, and to increase the lifting force for a given motor size. Mechanical switches are used as end-of-movement sensors and home position detectors. The performed tests to check the mover prototype performance are also reported in this paper. Next step will be to launch series production, which will consist of 16 units.

TUPP091	WISE: a Simulation of the LHC Optics Including Magnet Geometrical Data	simulation, injection, optics, lattice	1744
	P. Hagen, M. Giovannozzi, J.-P. Koutchouk, T. Risselada, F. Schmidt, E. Todesco, E. Y. Wildner CERN, Geneva
	The beam dynamics in LHC strongly depends on the field quality and geometry of the magnets. A model of the LHC optics has been built, based on the information available at the end of the production as well as on statistical evaluations for the missing information The pre-processor WISE generates instances of the LHC field errors for the MAD X program, with the possibility of selecting various sources. This paper describes the progress since WISE was presented in EPAC06. The slot allocation in LHC is completed since all magnets are installed and interconnected. Geometric measurements have been added for all magnets. Furthermore, some statistical data is available relative to the precision of magnet installation (alignment) and tunnel movements. In this paper the code and the data are used to update the beta-beating estimate at injection and collision energy. The relevance of misalignments of the different magnets and their impact on beta-beating is compared to the sources that have been previously considered, i.e. the spread in the gradient of the cell quadrupoles and the uncertainty associated to the knowledge of the transfer functions of the stand-alone quadrupoles.

TUPP094	Recent Improvements in the Tracking Code PLACET	emittance, simulation, lattice, radiation	1750
	A. Latina, H. Burkhardt, G. Rumolo, D. Schulte, R. Tomas CERN, Geneva E. Adli University of Oslo, Oslo Y. Renier LAL, Orsay
	The Tracking Code PLACET has recently undergone several improvements. A redesign of its internal data structures and a new user interface based on the mathematical toolbox Octave have considerably expanded its simulation capabilities. Several new lattice elements, optimization algorithms and physics processes have been added to allow for more complete start-to-end simulations. The usage of the AML language and the Universal Parser Library extened its interfacing capability.

TUPP133	Assembly of the Carbon Beam Gantry at the Heidelberg Ion Therapy (HIT) Accelerator	ion, quadrupole, proton, survey	1839
	U. Weinrich, R. Fuchs GSI, Darmstadt E. Sust MT Mechatronics, Main
	The HIT facility comprises the only carbon ion gantry worldwide. This gantry is especially unique in offering fully flexible beam transport to the patient up to a magnetic rigidity of 6.6 Tm, equivalent to an energy of C-ions of 430 MeV/u. It includes a full 3D-beam scanning system and full medical treatment environment. The gantry can be rotated by 360 degree so that the beam may be aimed at the patient from arbitrary directions. Commissioning of the gantry with beam was started in January 2008, when the first beams were transported into the treatment room. The design and assembly of this gantry with a rotating mass on the order of 600 tons was a real challenge to the project partners involved, in particular the supplier MT Mechatronics. Given the tight tolerances for the position of the beam line components the survey and alignment procedure was difficult, since also the elastic deformation for the different rotation angles had to be taken into account. This presentation will report on the experiences and results of the assembly and alignment phases. Furthermore, the final performance reached for precision and reproducibility of the beam line components will be presented.

WEIM03	Industrialization of Superconducting Accelerator Module Production	vacuum, linac, collider, free-electron-laser	1964
	B. Petersen DESY, Hamburg
	As part of the EUROFEL Design Study, two industrial partners recently took part in the assembly of superconducting TESLA modules for FLASH. The aim was to transfer the module assembly knowledge to industry and to analyse the assembly sequence to perpare for industrial production for future projects such as the XFEL. This talk should discuss the conclusions of this study and identify issues that must be considered when transferring SRF technology to industry.
	Slides

WEPC001	Status of PETRA III	wiggler, damping, vacuum, quadrupole	1977
	K. Balewski DESY, Hamburg
	PETRA III is a new hard x-ray synchrotron radiation source which will be operated at 6 GeV with a extremely low horizontal emittance of 1nmrad. This new light source will be the result of a conversion of the existing accelerator PETRA II into a light source. The conversion comprises the complete rebuilding of one eighth of the 2304 m long storage ring, which will then house 14 undulator beam lines and the modernisation and refurbishment of the remaining seven eighths. In addition two 100m long damping wiggler section will be installed which are required to achieve the small design emittance. During the last four years extensive design work, construction and production of components have been carried out to prepare for the conversion. Since the 2nd of July the construction activities have started when PETRA II was no longer needed as a pre-accelerator for HERA. At present the project is still on track so that operation with beam is foreseen for January 2009 and first user experiments in the second half of 2009. In this report a brief overview of the project and the status of the constructional work, the different components and the installation in the tunnel will be given.

WEPC101	Improved Homogeneity of Permanent Magnets for Undulators and Wigglers	permanent-magnet, undulator, wiggler, controls	2234
	F.-J. Boergermann, R. Blank, G. W. Reppel Vacuumschmelze GmbH & Co. KG, Hanau J. Bahrdt BESSY GmbH, Berlin J. Pflueger DESY, Hamburg
	The homogeneity of permanent magnets for use in undulators and wigglers were significantly improved in close collaboration between industry and scientific institutes throughout the last three years. Magnets with a variation of less than ± 1% in remanence, ± 1° magnetic angle and ± 1% hot/cold-side effect can be produced now - a variation of the magnetic angle of less than ± 0.5 ° is possible for some products. The development was assisted by improved characterization equipment for magnetic dipole moment and magnetic inhomogeneities by the scientific partners, which was made available for industrial application at Vacuumschmelze.

WEPC111	Latest Progress in Insertion Devices at ACCEL Instruments	undulator, insertion, insertion-device, synchrotron	2261
	D. Doelling, B. Fischer, A. Hobl, P. A. Komorowski, D. Krischel, M. Meyer-Reumers, H. Vogel ACCEL, Bergisch Gladbach
	ACCEL Instruments GmbH has designed, manufactured, and tested several insertion devices for synchrotron light sources and free electron lasers around the world. ACCEL has been awarded for the construction of two In – Vacuum – Undulators for the ALBA/CELLS synchrotron light source in Barcelona, Spain. The design originates from the standard ESRF IVU based on the license agreement with their ID group. The status of the design work will be summarized. Also ACCEL is manufacturing two granite measurement benches for the FERMI project at Elettra in Trieste, Italy. Both benches are designed to characterize insertion devices in a fast and accurate way. A summary of the commissioning results will be presented. A full functional prototype Hybrid Undulator for the European X-FEL project in Hamburg was delivered successfully and, as the first device, in full compliance with the technical specification. Also the industrial study requested by DESY for the adaptation of the design towards a large series production of 5m long undulators for the European X-FEL, was completed as the first one in full compliance with the DESY specification and the basic conclusions are presented.

WEPC116	FERMI@Elettra Undulator Frame Study	undulator, polarization, simulation	2276
	D. La Civita, R. Bracco, B. Diviacco, G. Tomasin, D. Zangrando ELETTRA, Basovizza, Trieste
	The FERMI@Elettra project foresees installation of both linear (LPU) and elliptical polarization undulators (EPU). Following the girder study presented last year, a detailed design of the undulator frame has been now carried out. The aim of this work was to find out a mechanical structure that guarantees minimum displacement of the girders supporting the magnet arrays. At the same time the undulator overall dimensions have been taken into account and the mechanical structure mass minimized. In this paper topology optimization result, finite element simulation and multi-objective optimization analysis are presented.

WEPC124	Magnetic Measurement System for the SPARC Insertion Devices	undulator, laser, controls, electron	2297
	M. Quattromini, F. Ciocci, G. Dattoli, M. Del Franco, A. Doria, G. P. Gallerano, L. Giannessi, E. Giovenale, A. Lo Bue, G. L. Orlandi, A. Petralia, P. Rossi, L. Semeraro, I. P. Spassovsky, V. Surrenti ENEA C. R. Frascati, Frascati (Roma) A. Dipace, E. Sabia ENEA Portici, Portici (Napoli)
	The characteristics and performances of the magnetic measurement system for the SPARC insertion devices are presented. A typical configuration formed by a a Hall probe mounted on a cart sliding on a granite beam was adopted to measure the properties of the six SPARC undulator sections. This approach has been adopted usually for rapid local field measurements. In this contribution we show that precision levels comparable to those of other well established techniques can be achieved also for critical issues like alignments, field integrals, phase errors etc. A new device purposedly designed to identify the reading area of the Hall probe with respect to bench coordinate system is presented and discussed.

WEPC143	System for Local Magnetic Field Measurement System Based on a Coil with Three Square Millimeter	undulator, multipole, impedance	2344
	J. F. Citadini, R. Basilio, M. Potye, G. Tosin LNLS, Campinas
	We present a magnetic field measurement system based on a rotating coil with 3mm2 active area and approximately 500 turns to measure local magnetic field. The structure of a coil is not so complex, simplifying the evaluation of its sources of errors. The steps used to build the coil are shown as well as the performance of the measurement system. The calibration of the coil was made against a magnetic field generated by a solenoid with very well determined geometry.

WEPC150	Fast Local Bump System for Helicity Switching at the Photon Factory	undulator, photon, vacuum, kicker	2356
	K. Harada, Y. Kobayashi, T. Miyajima, S. Nagahashi, T. Obina KEK, Ibaraki S. Matsuba Hiroshima University, Graduate School of Science, Higashi-Hiroshima
	Two APPLE-II type variably polarizing undulators will be installed at the south straight section of the PF (Photon Factory) ring. The 10Hz fast orbit switching in these undulators will be conducted for the helicity switching. The required angular difference of the orbits in two undulators is 0.3mrad. The five identical bump magnets and AC power supplies are manufactured to make 10Hz time varying local bumps. In order to achieve the local bump and prevent the fluctuation of the beam orbit with the effects of the insertion devices and magnetic errors, the feed forward correction with the bump magnets and the feedback correction with the fast steering magnets are required. In this presentation, the measurement results of the magnetic field and the frequency response, the configuration of the control system, and the simulation results to achieve the local bumps are shown.

WEPD012	The LHC Continuous Cryostat Interconnections: the Organization of a Logistically Complex Worksite Requiring Strict Quality Standards and High Output	controls, cryogenics, vacuum, quadrupole	2428
	P. Fessia, F. F. Bertinelli, D. Bozzini, P. Cruikshank, A. Jacquemod, W. Maan, A. Musso, L. Oberli, A. Poncet, S. Russenschuck, F. Savary, M. Struik, Z. Sulek, J.-P. G. Tock, D. Tommasini, C. Vollinger CERN, Geneva A. Grimaud ALL43, Saint-Genis-Pouilly A. Kotarba HNINP, Kraków L. Vaudaux IEG, St-Genis-Pouilly
	The interconnections of the Large Hadron Collider (LHC) continuous cryostat have been completed in autumn 2007: 1695 magnet to magnet interconnections and 224 interconnections between the continuous cryostat and the cryogenic distribution line have been closed along the 27km of the LHC. The high productivity demanded, the complexity of the interconnection sequence, the strict quality standards have required an ad hoc organization in order to steer and coordinate the activities on a worksite that was spread along the whole accelerator ring. The optimization of the intricate sequence of construction and test phases carried out by CERN staff, CERN collaborating institutes and contractors have led to the necessity of a common approach and of a very effective information flow. Specialized CERN teams have been created to deal with non standard operation to smooth the work sequences of the main assembly teams. In this paper, after having recalled the main technical challenges, we review the organizational choices that have been taken, their impact on quality and productivity and we briefly analyze the development of the worksite in term of allocated resources and production.

WEPD043	Orbital Welding of QRL Line in Confined Environment	cryogenics, vacuum, controls, collider	2509
	E. P. Roussel Air Liquide, Sassenage P. J.D. P. Mazoyer ORBITAL, Vonnas
	AIR LIQUIDE DTA was in charge of design, manufacturing of element and installation of QRL line of CERN. The elements of this cryogenic line have been welded by orbital welding with an open weld head. A specific welding head has been developed for the project. Radial and axial clearances lead the design of the head. To install this cryogenic line, more than 15 000 orbital welds have been realized. This paper will present the technical requirements applicable to QRL line, different welding configuration, main step to qualify welding process. We will describe the results of non destructive examination: helium leak test, X-ray inspection and visual inspection.

WEPP009	Collimator Integration and Installation Example of One Object to be Installed in the LHC	vacuum, insertion, collimation, survey	2542
	K. Foraz, O. Aberle, R. W. Assmann, C. Bertone, R. Chamizo, S. Chemli, J.-P. Corso, F. Delsaux, J. L. Grenard, J. M. Jimenez, Y. Kadi, K. Kershaw, M. Lazzaroni, R. Perret, Th. Weiler CERN, Geneva J. Coupard IN2P3-CNRS, Orsay
	The collimation system is a vital part of the LHC project, protecting the accelerator against unavoidable regular and irregular beam loss. About 80 collimators will be installed in the machine before the first run. Two insertion regions are dedicated to collimation and these regions will be among the most radioactive in the LHC. The space available in the collimation regions is very restricted. It was therefore important to ensure that the 3-D integration of these areas of the LHC tunnel would allow straightforward installation of collimators and also exchange of collimators under the remote handling constraints imposed by high radiation levels. The paper describes the 3-D integration studies and verifications of the collimation regions combining the restricted space available, the dimensions of the different types of collimators and the space needed for transport and handling. The paper explains how installation has been planned and carried out taking into account the handling system and component availability.

WEPP070	High Efficiency Collimation with Bent Crystals	collimation, scattering, proton, simulation	2680
	S. Hasan Univ. Insubria and INFN Milano, Como
	A revolutionary collimation approach is being developed by the H8RD22 collaboration. The basic idea is to replace the amorphous jaws, which spread the beam halo in the whole solid angle, with bent crystals, which are able to deviate the halo particles in a given direction outside the beam core. Studies to investigate the bent crystal properties have been carried out over the past 3 years at the H8 beam line (CERN SPS) with a 400 GeV/c proton beam. The crucial result of these studies is the observation of the Volume Reflection effect, the coherent scattering of the beam on the crystalline plane which provides a small but very efficient (respectively, 14 μrad and 98% at 400 GeV/c) particle deflection. The high efficiency (which should increase at higher energy) combined with a large angular acceptance (~100 μrad) led to the development of multi-reflection systems to increase the deflection angle. Nowadays this system has reached the stage to be tested in a circular accelerator as a primary collimator to verify the effective collimation efficiency in a complex environment. The second phase of the LHC collimation could be the first application of this crystal based system.

THPC021	Investigations on a Q0 Doublet Optics for the LHC Luminosity Upgrade	quadrupole, luminosity, optics, closed-orbit	3023
	E. Laface, W. Scandale, E. Y. Wildner CERN, Geneva C. Santoni Université Blaise Pascal, Clermont-Ferrand
	The Q0 scheme of the LHC insertion region is based on the introduction of a doublet of quadrupoles at 13 meters from IP. We present here the doublet optics and the magnets layout such as gradients, lengths, positions and apertures. In this scheme we show the gain in luminosity and chromaticity, with respect to a nominal layout with β=0.25 (i.e. LHC phase 1 upgrade) and β=0.15 m, due to a smaller beta-max. We show the alignment tolerance and the energy deposition issues, in Q0A-Q0B. We also consider shielding the magnets with liners. The capability of Q0 optics to limit the β function could be exploited after the LHC Phase 1 upgrade in order to reduce the β* below 0.25 m, leaving the upgraded triplet unchanged.

THPC030	Simulation Studies of Correlated Misalignments in the ILC Main Linac and the Influence of Ground Motion	emittance, simulation, linac, survey	3044
	F. Poirier, D. Kruecker, I. Melzer-Pellmann, N. J. Walker DESY, Hamburg
	Component misalignments are an important source of emittance dilution in the main linac of the International Linear Collider (ILC). The impact of static uncorrelated alignment errors has been widely studied with various simulation codes and several beam based alignment algorithms. For a realistic scenario one has to take into account that the survey and alignment process will introduce correlations between the component errors. In the present paper we study the performance of the Dispersion Matched Steering (DMS) technique for the case of such correlated misalignments. Different models for the correlations are investigated including a proposed alignment strategy for the ILC main linac* which has been implemented into the Merlin C++ library*. In addition to the initial static errors, dynamic errors due to ground motion will produce an emittance growth with time. For this case we have also investigated the stability of DMS tuning over time. Kiyoshi Kubo, private communication ** Merlin - A C++ Class Library for Accelerator Simulations; http://www.desy.de/~merlin.

THPC037	Studies of Orthogonal Bumps for ILC Main Linac	emittance, linac, coupling, simulation	3059
	N. Solyak Fermilab, Batavia, Illinois S. A. Glukhov BINP SB RAS, Novosibirsk
	To preserve small vertical emittance of the beam in ILC main linac a few beam-based alignment techniques were proposed and studied in recent years. Dispersion and wakefield bumps are one of the effective tool for final tuning of the machine. One of the modifications of bumps is so called orthogonal (or SVD) bumps, proposed for CLIC. In paper we present study of orthogonal bumps performances for final alignment of the ILC main linac.

THPP025	Fabrication Status of the PEFP DTL II	linac, proton, laser, vacuum	3425
	H. S. Kim, Y.-S. Cho, J.-H. Jang, H.-J. Kwon, B.-S. Park KAERI, Daejon
	The DTL II as a main part of the PEFP proton linac is under development. Following the DTL I which accelerates the proton beam up to 20 MeV, DTL II increases the proton energy from 20 MeV to 100 MeV. The DTL II consists of 7 tanks and each tank is composed of 3 sections whose length is about 2.2 m. The tank is made of seamless carbon steel and inside surface is electroplated with copper. Each drift tube contains an electroquadrupole magnet which is made of hollow conductor and iron yoke with epoxy molding. The status of development and test results of the fabricated parts are reported in this paper.

THPP071	Construction of Six-sector FFAG Ring for Muon Phase Rotation	power-supply, multipole, injection, vacuum	3524
	Y. Arimoto, M. Aoki, S. Araki, Y. Eguchi, K. Hirota, I. Hossain, I. Itahashi, Y. Kuno, Y. Kuriyama, Y. Nakanishi, A. Sato, M. Y. Yoshida Osaka University, Osaka Y. Iwashita Kyoto ICR, Uji, Kyoto A. Kurup Imperial College of Science and Technology, Department of Physics, London Y. Mori KURRI, Osaka C. Ohmori KEK, Ibaraki T. Oki Tsukuba University, Ibaraki
	PRISM is a next-generation of muon source which provides high purity, high intense and high brightness beam. In PRISM, a PRISM-FFAG is one of key section which make a muon beam narrow energy width by using phase rotation technique. To demonstrate the phase rotation, a six-cell FFAG ring has been constructed; the ring consists of full size of scaling-FFAG magnets and a high gradient rf cavity. The experiment is achieved by injecting alpha particles from a radioisotope source as a beam. Construction of the ring has been started from September, 2007; beam duct has been designed and installed, the six FFAG magnets has been aligned, etc. In this paper, we will present the design of the ring and the construction (alignment, etc) from engineering point of view.