Abstracts Brochure - 2nd International Particle Accelerator Conference

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� Classification 6: Beam Instrumentation and Feedback Poster Panel 75 ID: 3808 - TUPC148 Measuring Emittance with the MICE Scintillating Fibre Trackers, David Adey (University of Warwick, Coventry) - The Muon Ionization Cooling Experiment (MICE) aims to measure a 10% reduction in a muon beam emittance to within 0.1%. To achieve this two scintillating fibre trackers will be placed within a 4T solenoidal field. The trackers utilize fibres with a diameter of 350 microns to provide a position resolution of less than 0.5 mm. Details of the tracker hardware, electronics and its calibration and reconstruction methods will be presented, along with the measured performance under cosmic ray tests and the simulated performance in MICE. Sub Classification: T03 Beam Diagnostics and Instrumentation Poster Panel 76 ID: 3621 - TUPC127 Optical Transition Radiation System for ATF2, Javier Alabau-Gonzalvo, Cesar Blanch Gutierrez, Angeles Faus-Golfe, Juan Jose Garcia-Garrigos (IFIC, Valencia), Juan Cruz, Douglas McCormick, Glen White, Mark Woodley (SLAC, Menlo Park, California) - In this paper we present the first measurements performed during the fall 2010 and early 2011 runs. Software development, simulations and hardware improvements to the Multi-Optical Transition Radiation System installed in the beam diagnostic section of the Extraction (EXT) line of ATF2 are described. 2D emittance measurements have been performed and the system is being routinely used for coupling correction. Realistic beam simulations have been made and compared with the measurements. A 4D emittance procedure, yet to be implemented, is also discussed. A demagnifier lens system to improve the beam finding procedure has been designed and will be implemented in a future run. Finally, we discuss further verification work planned for the next run period of ATF. Funding Agency: FPA2010-21456-C02-01 Work supported in part by Department of Energy Contract DE-AC02-76SF00515 Sub Classification: T03 Beam Diagnostics and Instrumentation 23 Poster Panel 77 ID: 3409 - TUPC076 Realization of a High Bandwidth Bunch Arrival time Monitor with Cone-shaped Pickup Electrodes for FLASH and XFEL, Aleksandar Angelovski, Matthias Hansli, Rolf Jakoby, Alexander Kuhl, Andreas Penirschke, Sascha Schnepp (TU Darmstadt, Darmstadt), Holger Schlarb (DESY, Hamburg), Thomas Weiland (TEMF, TU Darmstadt, Darmstadt) - In the Free Electron Laser in Hamburg (FLASH) an electrooptical system is used as a Bunch Arrival time Monitor (BAM). The time-of-arrival resolution is proportional to the steepness of the beam pick-up signal at the first zero-crossing*. Future experiments will be conducted using significantly lower bunch charges resulting in a reduced signal steepness. This requires BAM pickup electrodes with increased bandwidth as introduced in **. This paper presents the implementation and measurement results of a high bandwidth cone-shaped pickup capable of operating in the frequency range up to 40 GHz. The slope steepness at the zero crossing is investigated for a simplified equivalent circuit model. RFmeasurements have been performed using a nonhermetic prototype of the BAM pickups for assessing the influence of manufacturing tolerances on the sensor performance. The measurements are compared to simulation results obtained by CST PARTICLE STUDIO®. * F. Loehl et al., Proc. of DIPAC2007, WEPB15, p. 262 (2007). ** A. Angelovski et al., "Pickup design for a high resolution Bunch Arrival time Monitor for FLASH and XFEL", DIPAC2011. Funding Agency : Funded by the Federal Ministry of Education and Research (BMBF): 05K10RDA Sub Classification: T03 Beam Diagnostics and Instrumentation Poster Panel 78 ID: 3208 - TUPC124 Laser Wire Emittance Measurement Line at CLIC, Hector Garcia, Yuri Alexandrovich Kubyshin (UPC, Barcelona), Daniel Schulte, Frank Stulle (CERN, Geneva), Grahame A. Blair (JAI, Oxford) - A precise measurement of the transverse beam size and beam emittances upstream of the final focus is essential for ensuring the full luminosity at future linear colliders. A scheme for the emittance
measurements at the RTML line of the CLIC using laser-wire beam profile monitors is described. A lattice of the measurement line is discussed and results of simulations of statistical and machinerelated errors and of their impact on the accuracy of the emittance reconstruction are given. Modes of operation of the laser wire system and its main characteristics are discussed. Sub Classification: T03 Beam Diagnostics and Instrumentation Poster Panel 79 ID: 3785 - TUPC077 Investigations on High Sensitive Sensor Cavity for Longitudinal and Transversal Schottky for the CR at FAIR, Matthias Hansli, Aleksandar Angelovski, Rolf Jakoby, Andreas Penirschke (TU Darmstadt, Darmstadt), Peter Hülsmann (GSI, Darmstadt), Wolfgang Ackermann, Thomas Weiland (TEMF, TU Darmstadt, Darmstadt) - For the Collector Ring (CR) at the FAIR (Facility for Antiproton and Ion Research) accelerator complex a sensitive Schottky sensor is required. The CR covers different modes of operation, like pre-cooling of antiprotons at 3 GeV, pre-cooling of rare isotope beams at 740 MeV/u and an isochronous mode for mass measurements. For longitudinal Schottky measurements the concept of a resonant cavity had been introduced*. Due to limited space inside the ring integration of transversal Schottky is restricted to one plane only. In this paper the demands and required changes to implement also transversal Schottky measurements are discussed. An analysis of the expected signal characteristics featuring equivalent circuit are shown, as well as numerical full wave simulations of the cavity. The applied numerical models are based on the finite integration technique as well as on the finite element method and include explicitly the coupling to the pickupantennas. The signal analysis utilizes both a modal approach and a beam-induced excitaion using a wakefield approach. * M. Hansli, A. Penirschke, R. Jakoby, W. Kaufmann, W. Ackermann, T. Weiland, "Conceptual Design of a High Sensitive Versatile Schottky Sensor for the Collector Ring at FAIR", DIPAC2011. Funding Agency : Funded by the Federal Ministry of Education and Research (BMBF): 06DA90351 Sub Classification: T03 Beam Diagnostics and Instrumentation � 24 Poster Panel 80 ID: 3150 - TUPC086 A Setup for Single Shot Electro Optical Bunch Length Measurements at the ANKA Storage Ring, Nicole Hiller, Erhard Huttel, Anke-Susanne Mueller (KIT, Karlsruhe), Felix Lukas Mueller, Peter Peier, Volker Schlott (PSI, Villigen) - Single shot electro optical bunch length measurements, in particular using spectral decoding, are foreseen for the ANKA storage ring. This will allow to resolve fast changes of bunch deformation and structure during the low alpha operation (2-15 ps rms bunch length). This technique uses a chirped laser pulse to probe the field induced birefringence in an electro optical crystal. The laser pulse is then analyzed in a single shot spectrometer. To obtain the birefringence modulation one can either use the near field of the electron bunch (placing the crystal close to the electron bunch in the UHV system of the storage ring), or the far field (coherent synchrotron radiation in the THz range at a THz-/IR-Beamline). The laser needs to supply: sufficient tunability of pulse length, a wide spectrum to allow for a sub-ps resolution. Additionally it must provide a modelocked operation synchronized to the bunch revolution clock. For this purpose, a mode locked Ytterbium fibre laser system which operates at 1030 nm has been developed at the Paul-Scherrer Institute in Switzerland. We give an overview over the experimental set up in the ANKA storage ring and the status of the project. Funding Agency: Supported by the Initiative and Networking Fund of the Helmholtz Association under VH-NG-320. Sponsored by the German Federal Ministry of Education and Research under contract number 05K10VKC Sub Classification: T03 Beam Diagnostics and Instrumentation Poster Panel 81 ID: 3609 - TUPC118 Test Results on Beam Position Resolution for Low-Q IP-BPM at KEK-ATF2, Si-Won Jang, Aeyoung Heo, Ji-Gwang Hwang, Eun-San Kim, Hyoung-Suk Kim (Kyungpook National University, Daegu), HyangKyu Park (CHEP, Daegu) - We have performed the beam tests on the beam position resolution for the Low-Q IP-BPM (Interaction Point- Beam Position Monitor) at ATF2 which is an accelerator test facility for the <strong>International</strong> Linear Collider. The main goals of KEK-ATF2 are to achieve beam size of 37 nm and beam resolution of nano-meter for beam stabilization. Resolution tests
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Abstracts Brochure - 2nd International Particle Accelerator Conference

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