Paper |
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Other Keywords |
Page |
MOXPA02 |
SCRF Test Facilities toward the ILC
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KEK, DESY, XFEL, linac |
5 |
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- K. Saito
KEK, Ibaraki
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After the ICFA selection of the superconducting linear collider technology in August 2004, many intensive R&D programs are in the planning stage or already underway. Work is proceeding in the three major geographical regions involved in the ILC: Europe(TTF), North America (SMTF) and Asia (STF). In this paper, the global activity represented by these superconducting RF test facilities will be reviewed. Their goals, plans, schedules and possible complementarities will be presented. The performance expected from the different R&D efforts by 2008, and the corresponding contribution to the ILC Technical Design Report, will be especially emphasized.
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Transparencies
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MOPCH140 |
Compensation of Lorentz Force Detuning of a TTF 9-cell Cavity with a New Integrated Piezo Tuner
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klystron, controls, feedback, resonance |
378 |
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MOPCH161 |
Development of a Prototype Superconducting CW Cavity and Cryomodule for Energy Recovery
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ERL, TESLA, linac, ERLP |
436 |
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- P.A. McIntosh, C.D. Beard, D.M. Dykes, B. Todd
CCLRC/DL/ASTeC, Daresbury, Warrington, Cheshire
- S.A. Belomestnykh
Cornell University, Laboratory for Elementary-Particle Physics, Ithaca, New York
- A. Buechner, P. Michel, J. Teichert
FZR, Dresden
- J.M. Byrd, J.N. Corlett, D. Li
LBNL, Berkeley, California
- T. Kimura, T.I. Smith
Stanford University, Stanford, Califormia
- M. Liepe, V. Medjidzade, H. Padamsee, J. Sears, V.D. Shemelin
Cornell University, Ithaca, New York
- D. Proch
DESY, Hamburg
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Energy Recovery LINAC (ERL) and LINAC-driven FEL proposals and developments are now widespread around the world. Superconducting RF (SRF) cavity advances made over the last 10 years for TESLA/TTF at 1.3 GHz, in reliably achieving accelerating gradients >20 MV/m, suggest their suitability for these ERL and FEL accelerators. Typically however, photon fluxes are maximised from the associated insertion devices when the electron bunch repetition rate is as high as possible, making CW-mode operation at high average current a fundamental requirement for these light sources. Challenges arise in controlling the substantial HOM power and in minimizing the power dissipated at cryogenic temperatures during acceleration and energy recovery, requiring novel techniques to be employed. This paper details a collaborative development for an advanced high-Qo cavity and cryomodule system, based on a modified TESLA cavity, housed in a Stanford/Rossendorf cryomodule. The cavity incorporates a Cornell developed resistive-wall HOM damping scheme, capable of providing the improved level of HOM damping and reduced thermal load required.
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MOPCH166 |
Construction, Tuning and Assembly of the Beta=0.12 SC Ladder Resonator at LNL
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target, simulation, EURISOL, linac |
451 |
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- G. Bisoffi, E. Bissiato, A. Palmieri
INFN/LNL, Legnaro, Padova
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The Ladder resonator is a 4-gap full Nb cavity suitable for the 0.1< beta <0.2 range of high current proton linacs. A beta=0.12 Nb prototype of this cavity has been built by ZANON (Schio, Italy) on the basis of LNL design. In this paper we describe the construction procedure of such cavity, as well as the tuning steps, aimed at the achievement of the target frequency of 352.2 MHz and the desired field uniformity along the four gaps. Related results of RF simulations and room temperature tests are presented. The preparation of the SC test at LNL is at an advanced stage.
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MOPCH170 |
Experimental and Theoretical Analysis of the Tesla-like SRF Cavity Flanges
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vacuum, TESLA, cryogenics, collider |
463 |
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- L. Monaco, P. Michelato, C. Pagani, N. Panzeri
INFN/LASA, Segrate (MI)
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In view of the future large SC accelerator, an improvement of the reliability and a cost reduction of the SRF cavities cold flanges is required. In this paper, a critical analysis of the TESLA-like cold connection flanges at room and at cryogenic temperature is presented. This analysis is based on experimental characterization of the mechanical properties of the joint and of the leak rates during the sealing process. A FEM model, that agrees with the experimental data, is also presented. This model is being used for the optimization of the present SRF flanges and the development of new cold connections.
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MOPCH171 |
ILC Coaxial Blade Tuner
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DESY, LEFT, electron, linear-collider |
466 |
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- C. Pagani, A. Bosotti, P. Michelato, N. Panzeri, R. Paparella, P. Pierini
INFN/LASA, Segrate (MI)
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A coaxial (blade) tuner solution has been developed for the compensation of the Lorentz force detuning of the superconducting cavities under the high gradient pulsed operation foreseen for ILC operation. The device is based on prototypes successfully tested at DESY in 2002 both on CHECHIA and on the superstructures inserted in the TTF string. During both tests the blade tuner performed as expected in terms of stiffness, frequency sensitivity and tuning capabilities. An improvement of the tuner characteristics has been designed by the integration of fast tuning capabilities by means of piezo-ceramic element. Two prototipes of the new INFN coaxial piezo blade tuner have just been manufactured and they will be tested at DESY and BESSY after the cavity integration. In this paper the blade tuner design and main characteristics are presented, together with the early interpretation of the cold test results.
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MOPLS104 |
The Progress in Developing Superconducting Third Harmonic Cavity
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DESY, simulation, coupling, XFEL |
804 |
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- N. Solyak, H. Edwards, M. Foley, I.G. Gonin, E.R. Harms, T.K. Khabiboulline, D.V. Mitchell, D.O. Olis, A.M. Rowe
Fermilab, Batavia, Illinois
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XFEL and TTF facilities are planning to use section with a few third harmonic cavities (3.9GHz) upstream of the bunch compressor to improve beam performances [1-2]. Fermilab is developing superconducting third harmonic section for TTFII upgrade. This section will include four cavities equiped with couplers and blade tuners, installed in cryostat. Up to now, two cavities are complete and one of them is under test. The status of the cavity development and preliminary test results are presented in the paper.
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TUPCH070 |
Development of Beam Profile Monitor for Cyclotron
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cyclotron, CDA, positron, vacuum |
1169 |
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- K.-H. Park, S.-M. Hong, Y.G. Jung, D.E. Kim, H.-G. Lee, W.W. Lee
PAL, Pohang, Kyungbuk
- D.H. An, J.-S. Chai, Y.S. Kim
KIRAMS, Seoul
- B.-K. Kang
POSTECH, Pohang, Kyungbuk
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A beam profile monitor was designed and fabricated to measure the beam shape of the cyclotron MC50 beam line at KIRAMS. The sensor module was made of 13 tungsten wires and they were assembled into an array type. The sensor wires whose diameter is 1 mm were placed in parallel with the incident beam, while they were placed in the perpendicular direction to the incident beam in the conventional method. Thus this monitor has a linear actuator to scan whole beam profile, which moves the sensor module from the dormant to measurement position or vice versa. The current output of each sensor was amplified using a trans-resistance amplifier which can measure input current in the range of 1 pA. The amplifier had a resolution of ~ 20 fA, the temperature drift of ~0.5 pA/°C, and the signal-to-noise ratio greater than 80 dB. Various test results of the amplifier and sensor module assembly are given in this paper. The measured current profiles of cyclotron beam line at KIRAMS are also given.
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TUPLS134 |
Managing the Quality Assurance Documentation of Accelerator Components Using an EDMS
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quadrupole, DESY, XFEL, PETRA |
1819 |
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- L. Hagge, J. Buerger, J.A. Dammann, J. Kreutzkamp, K. Lappe
DESY, Hamburg
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Quality assurance (QA) documents are often collected locally on a per-component basis by the manufacturing teams, while project engineers require global evaluations of the QA documents e.g. for production control or during installation and commissioning of the machine. DESY is using an Engineering Data Management System (EDMS) for supporting and unifying the QA documentation of different accelerator components. The EDMS provides dedicated user interfaces which are optimized for the needs of the specific engineering teams which are working on the components (including industrial manufacturers), and at the same time integrates the QA documents into a central database for further overall analysis and applications. The poster introduces the general structure of QA procedures, describes the benefits of using an EDMS for QA documentation and describes examples from different applications at XFEL and PETRA III.
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