Abstracts Brochure - 2nd International Particle Accelerator Conference

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are studying. The resonant models of these structures and the structures with power ports were designed. Electrodynamics characteristics, electric field distribution for all models were acquired. Accelerating structure consisting of 1.6 cells will operate in pi mode of standing wave, all other structures operate in pi/2 mode traveling wave. Accelerating structure based on running wave resonator with 7 cells and 2 half-cells of DLW has most suitable electrodynamics characteristics and field distribution for sub-mm pulse source according to simulation results. Sub Classification: A08 Linear Accelerators Poster Panel 28 ID: 4374 - MOPZ033 Proton Contamination Studies in the Muon Ionization Cooling Experiment, Summer Blot (University of Chicago, Chicago, Illinois), Rob Roy MacGregor Fletcher (UCR, Riverside, California) - The Muon Ionization Cooling Experiment (MICE) aims to demonstrate transverse beam emittance reduction for a muon beam. To create these muons, a titanium target is dipped into the ISIS proton accelerator at Rutherford Appleton Laboratory (UK) to create pions, which are transported and decay to muons in the MICE beamline. Beam particle identification and triggering is performed using time of flight (ToF) detectors. When running the MICE beamline with positive polarity, protons produced in the target contaminate the muon beam with a sufficiently high rate to saturate the TOF detectors. Polyethylene sheets of varying thicknesses were installed to absorb the proton impurities in the beam. Studies with pion beams at momenta of 140, 200, and 240MeV/c were performed with different proton absorber thicknesses. The results of these studies show good agreement with theoretical range plots and will be presented. Sub Classification: A09 Muon Accelerators and Neutrino Factories Poster Panel 29 ID: 4198 - MOPZ014 MAUS: MICE Analysis User Software, Christopher Douglas Tunnell (JAI, Oxford) - The Muon Ionization Cooling Experiment (MICE) is unique because it measures accelerator physics quantities using particle physics methods. It follows that the software that forms the theoretical model of MICE needs to be able to not only propagate beam envelopes and optical parameters but also model � 9 detector responses and matter effects for cooling. MICE addresses this dichotomy with the software framework MAUS in order to maximize its physics sensitivity whilst providing the conveniences of, for example, a common data structure. The diversity of challenges that MICE provides from the analysis perspective means that appropriately defining the software scope and layout is critical to the correctness and maintainability of the final accelerator physics analyses. MICE has structured its code into a Map-Reduce framework to enable better parallelization whilst also introducing unit, functional, and integration tests to ensure code reliability and correctness. These methods can apply to other experiments. Sub Classification: A09 Muon Accelerators and Neutrino Factories Poster Panel 30 ID: 3100 - TUPC046 Alignment Tolerances for Vertical Emittance, Kent Peter Wootton, Roger Paul Rassool, Geoffrey Taylor (The University of Melbourne, Melbourne), Mark James Boland, Rohan Dowd, Gregory Scott LeBlanc, Yaw-Ren Eugene Tan (ASCo, Clayton, Victoria), Yannis Papaphilippou (CERN, Geneva) - Alignment tolerances for the CLIC main damping ring magnetic lattice elements are presented. Tolerances are defined by the design equilibrium vertical emittance of 1 pm rad. The sensitivity of the uncorrected lattice to magnet misalignments is presented. Misalignments considered included quadrupole vertical offsets and rolls, sextupole vertical offsets, and main dipole rolls. Seeded simulations were conducted in MAD-X, and compared with expectation values calculated from theory. The lattice was found to be sensitive to betatron coupling as a result of sextupole vertical offsets in the arcs. Alignment tolerances, BPM and corrector requirements are presented also. For the same misalignment types, the equilibrium emittance of the corrected lattice is simulated. These are compared with expectation values calculated from theory. The vertical alignment tolerance of arc sextupoles is again demanding. Sub Classification: A10 Damping Rings Poster Panel 31 ID: 3360 - WEPZ002 Chromatic Aberration and Transmission of Laser Accelerated Protons Focused by a Solenoid, Husam Yousef Al-Omari, Ulrich Ratzinger (IAP, Frankfurt am Main), Ingo
Hofmann (GSI, Darmstadt) - Chromatic aberrations and emittance growth in the laser proton experiment LIGHT at GSI are calculated numerically from the proton trajectories through a given solenoid based on geometrical conditions. Transmission of protons through an aperture located behind solenoid at the focal spot is studied numerically. Different codes were employed in this study: TRACE 3D, Parmila, TraceWin as well as comparison with a Matlab program simulating accurate trajectories through the solenoid. The results show the dependence of chromatic aberration and emittance growth on the distance between laser-target and solenoid, which allow using an aperture behind the solenoid as energy filter of the beam. Sub Classification: A13 New Acceleration Techniques Poster Panel 32 ID: 4444 - WEPZ008 Experimental Plans to Explore Dielectric Wakefield Acceleration in the THz Regime, Francois Lemery (Northern Illinois University, DeKalb, Illinois) - Dielectric wakefield accelerators have shown great promise toward high-gradient acceleration. We investigate tow experiments in preparation to explore the performance of cylindrically-symmetric and slab-shaped dielectricloaded waveguides. The planned experiments at Fermilab and DESY will use unique pulse shaping capabilities offered at these facilities. The superconducting test accelerator at FNAL will ultimately provide flat beams with variable current profiles needed for enhancing the transformer ratio. The FLASH facility at DESY recently demonstrated the generation of a ramped round beam current profile that will enable us to explore the performance of cylindrically-symmetric structures. Finally both of these facilities incorporate superconducting linear accelerator that could generate bunch trains with closely spaced bunches thereby opening the exploration of dynamical effects in dielectric wakefield accelerators. We present the planned layout and simulated experimental performances. Funding Agency: This work was supported by the Defense Threat Reduction Agency, Basic Research Award \# HDTRA1-10-1-0051, to Northern Illinois University Sub Classification: A13 New Acc. Techniques Poster Panel 33 ID:4163 - WEPZ030 � 10 High-energy Electron Acceleration Research with a Capillary Plasma at GIST, Min-Seok Kim (APRI-GIST, Gwangju) - Compared with the conventional accelerators, laser-driven plasma accelerators have a much higher acceleration gradient of ~100 GeV/m and they can accelerate electrons to GeV level over a few centimeter distance. At GIST (Gwangju Institute of Science and Technology), we have ongoing research activities on laser-plasma acceleration using a capillary plasma source, where a high power laser pulse is optically guided in the cm–long capillary plasma with a parabolic density profile in the transverse direction. For this purpose, we developed several capillary plasma sources and tested them, which can provide a plasma density of ~1018 cm-3. In this poster, details about the capillary development and electron acceleration experiments in our group are presented. Sub Classification: A20 Plasma Wakefield Acceleration Poster Panel 34 ID: 4334 - WEPZ034 Resonant Plasma Wakefield Experiments at UCLA, Brendan Donald O'Shea, Atsushi Fukasawa, James Rosenzweig, Sergei Tochitsky (UCLA, Los Angeles, California), Bernhard Hidding (HHU, Duesseldorf; UCLA, Los Angeles), David Leslie Bruhwiler (Tech-X, Boulder, Colorado) - Present work in Laser Plasma Accelerators focuses on a single laser pulse driving a non-linear wake in a plasma. Such single pulse regimes require ever increasing laser power in order to excite ever increasing wake amplitudes. Such high power pulses can be limited by instabilities as well engineering restrictions and experimental constraints on optics. Alternatively we present a look at resonantly driving plasmas using a laser pulse train. In particular we compare analytic, numerical and PIC simulation results to characterize a proposed experiment to measure the wake produced by four Gaussian laser pulses. The current progress depicts the interaction of 4 laser pulses of 3 ps FWHM, separated peak-topeak by 18 ps, each of normalized vector potential a0~0.7. Results confirm previous discourse (*,**) and show, for a given laser profile, a band pass like structure of choices for plasma density grouped around the so called single pulse resonant condition, ωp=π/t_fwhm. * Umstadter, D., et al, Phys. Rev. Lett. 72, 1224 ** Umstadter, D., et al, Phys. Rev. E 51, 3484 Sub Classification: A20 Plasma Wakefield Acceleration
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Abstracts Brochure - 2nd International Particle Accelerator Conference

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