HIAT 2012 - List of Keywords (simulation)

Keyword: simulation

Paper	Title	Other Keywords	Page
MOB03	Design and Status of the Super Separator Spectrometer for the GANIL SPIRAL2 Project	multipole, status, dipole, heavy-ion	23
	J.A. Nolen, S.L. Manikonda ANL, Argonne, USA M. Authier, A. Drouart, J. Payet CEA/DSM/IRFU, France O. Delferrière CEA/IRFU, Gif-sur-Yvette, France J. Laune IPN, Orsay, France F. Lutton, H. Savajols, M. Souli, M.-H. Stodel GANIL, Caen, France
	Funding: This work is partially supported by the U.S. Department of Energy, Office of Nuclear Physics, under Contract No. DE-AC02-06CH11357. The Super Separator Spectrometer (S3) is a device designed for experiments with the very high intensity stable heavy ion beams of the superconducting linear accelerator of the SPIRAL2 Project at GANIL. S3 is designed to combine high acceptance, a high degree of primary beam rejection, and high mass resolving power to enable new opportunities in several physics domains, e.g. super-heavy and very-heavy nuclei, spectroscopy at and beyond the drip-line, isomers and ground state properties, multi-nucleon transfer and deep-inelastic reactions. The spectrometer comprises 8 large aperture multipole triplets (7 superconducting and 1 open-sided room temperature), 3 magnetic dipoles, and 1 electrostatic dipole arranged as a momentum achromat followed by a mass separator. A summary of the beam-optical simulations and the status of the main spectrometer components will be presented with special emphasis on the design of the superconducting multipole triplets.
	Slides MOB03 [2.745 MB]

MOB04	Argonne In-flight Radioactive Ion Separator	dipole, ion, multipole, target	24
	S.L. Manikonda, M. Alcorta, B. Back, J.A. Nolen, R.C. Pardo, E. Rehm, G. Savard, D. Seweryniak ANL, Argonne, USA B. Erdelyi Northern Illinois University, DeKalb, Illinois, USA
	Funding: This work was supported by the U.S. Department of Energy, Office of Nuclear Physics, under Contract No. DE-AC02-06CH11357 The Argonne In-flight Radioactive Ion Separator (AIRIS) is a new large recoil separator that is being designed as a part of proposed future upgrade of the ATLAS facility to provide at least 10 times more collection efficiency than the existing system. In combination with other proposed upgrades it will provide a 2 orders of magnitude gain in the intensity for the in-flight produced secondary beams compared to the existing facility. The resulting unprecedented intensities for the recoil beam open new opportunities in several physics domains, e.g. gamma ray spectroscopy after secondary reactions, reactions for rp‐, νp‐, αp‐ processes and CNO cycle. The proposed design for the AIRIS device is based on four multipole magnets and four dipole magnets arranged in a so called broadband spectrometer configuration. This arrangement will be followed by two RF cavities to provide further selection based on velocity differences between the primary beam tail and the recoiling RIB. The advantages of such a design and key parameters will be discussed. We will demonstrate the performance of the device for few representative reaction cases that can be studied using AIRIS.
	Slides MOB04 [1.626 MB]

PO13	Longitudinal Beam Motion in the KEK Digital Accelerator: Tracking Simulation and Experimental Results	space-charge, induction, acceleration, synchrotron	83
	X. Liu Department of Energy Sciences, Tokyo Institute of Technology, Yokohama, Japan T. Adachi Sokendai, Ibaraki, Japan S. Harada Tokyo City University, Tokyo, Japan T. Iwashita KEK, Ibaraki, Japan K. Takayama, T. Yoshimoto TIT, Yokohama, Japan
	Beam commissioning in the KEK Digital Accelerator, which is a small scale induction synchrotron (IS), has been conducted since the middle of 2011. Longitudinal beam motion in the induction synchrotron, which utilizes induction cells (IC) for acceleration and confinement, is characterized as barrier bucket acceleration. . These ICs are driven by the switching power supply (SPS). Pulse voltage is fully managed by the gate control for solid-state switching elements in the SPS, where FPGAs and DSPs take a key role. A tracking code has been developed to understand the longitudinal motion affected by longitudinal space charge forces, under programmed settings of confinement and acceleration voltage. This code, where the trigger control scenario is fully implemented, calculates temporal evolution of momentum and phase of macro-particles. The simulation result has well reproduced beam commissioning results, such as bunch squeezing experiment and barrier bucket acceleration. In addition, the code is going to be applied to explain the rapid growth of micro-bunch structure in the injected ion bunch. T. Iwashita et al., “KEK Digital Accelerator” , Phys. Rev. ST-AB 14, 071301 (2011). And K.Takayama et al., in this conference. ** S.Harada, Ms. Thesis (TCU) (2011).

PO16	MULTIPHYSICS AND PRESSURE CODE ANALYSIS FOR QUARTER WAVE β=0.085 AND HALF WAVE β=0.29 RESONATORS	niobium, cavity, target, radio-frequency	92
	S.J. Miller, J. Binkowski, A. Facco, M.J. Johnson, Y. Xu FRIB, East Lansing, Michigan, USA
	Funding: U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661 The driver linac design for the Facility for Rare Isotope Beams (FRIB) at Michigan State University (MSU) makes use of four optimized superconducting radio frequency (RF) resonators to accelerate exotic ions to 200 MeV/μ. The RF resonators were optimized using computer simulations for all expected physical encounters and corresponding electrical resonant frequency changes. Principal guidance from the ASME boiler and pressure vessel code (BPVC) were applied.
	Poster PO16 [0.535 MB]

PO17	Simulation of Electron and Ion Dynamics in an EBIS	ion, electron, background, space-charge	97
	L. Zhao, E.G. Evstati, J.S. Kim Far-Tech, Inc., San Diego, California, USA E.N. Beebe, A.I. Pikin BNL, Upton, Long Island, New York, USA
	Funding: Grant supported by DOE office of Nuclear Physics To model the dynamics of the ions in an Electron Beam Ion Source (EBIS), a time-dependent, self-consist particle-in-cell Monte Carlo code (EBIS-PIC) has been developed by FAR-TECH, Inc. The energetic background electron beam is modeled by PBGUNS (http://www.far-tech.com/pbguns/index.html) by dividing the long beam path into several segments to resolve the big length-to-radius spatial scaling problem. The injected primary ions and ionized neutral gas ions are tracked using Monte Carlo method which includes the ionization, charge-exchange and Coulomb collisions with the electron beam and the neutral gas in the potential well, which is calculated by solving the Poisson equation each time step. EBIS-PIC has been able to predict the spatial and velocity space distributions and the evolution of the charge state distribution (CSD) of trapped ions in EBIS devices operating in fast or slow trapping mode. The physical model of EBIS-PIC code and the simulations of the trapping and charge-breeding of injected Cs+1 ions on the Test EBIS* at BNL will be presented. The simulation results have shown good consistency with the experiments. * S. Kondrashev, J.G. Alessi, E.N.Beebe, C. Dickerson, P.N.Ostroumov, A. Pikin, G. Savard, NIMPR. A, 642 (2011), 18-24.

TUA02	A Cost-Effective Energy Upgrade of the ALPI Linac at INFN-Legnaro	linac, ion, cavity, ion-source	106
	G. Bisoffi, M. Comunian, A. Facco, A. Galatà, P. Modanese, R. Pengo, A. Pisent, A.M. Porcellato, S. Stark INFN/LNL, Legnaro (PD), Italy B.B. Chalykh ITEP, Moscow, Russia
	The ALPI SC linac at INFN-LNL is being constantly upgraded in terms of maximum beam energy (Ef) and current, made available for experiments. Presently, a liquid-N cooling scheme is being applied to the RF power couplers of the 16 full Nb resonators, to keep them locked at 5 MV/m, vs. present 3 MV/m. A further upgrade of the 44 “medium beta section” cavities, changing the cavity Cu substrates, was prototyped and is reported at this conference: however it is not fully funded yet and is extremely time-consuming. A cost-effective Ef upgrade is proposed here: to move 2 SC buncher cryostats, which house a single working SC QWR but were designed for 4, at the end of ALPI, equipping them with 4 Nb/Cu QWRs each (new bunchers would either be NC QWRs or a single SC cavity cryostat). The contribution of these cryostats to Ef would be extremely effective: e.g. a Ef~10 MeV/A (Ibeam≥ 1 pnA) Pb beam, a very attractive tool for the Nuclear Physics community, is achievable. A being performed upgrade of ALPI cryoplant, expected to increase the refrigeration capability by ~25%, makes this change possible today. Details of this solutions, as well as its limits, will be presented and discussed
	Slides TUA02 [3.722 MB]

WEB04	Electron and Ion Beam Dynamics in the CARIBU EBIS Charge Breeder	ion, electron, ion-source, acceleration	172
	C. Dickerson, S.A. Kondrashev, B. Mustapha, P.N. Ostroumov ANL, Argonne, USA A.I. Pikin BNL, Upton, Long Island, New York, USA
	Funding: This work is supported by the U.S. Department of Energy, Office of Nuclear Physics, under contract number DE-AC02-06CH11357. An Electron Beam Ion Source (EBIS) is being built to charge breed ion beams from the Californium Rare Isotope Breeder Upgrade (CARIBU) for acceleration in the Argonne Tandem Linear Accelerator System (ATLAS) at Argonne National Laboratory (ANL). The overall efficiency of the source and charge breeder system is important since CARIBU will produce many low intensity radioactive ion species. Simulations of the electron and ion beam dynamics have been used to determine the system’s expected performance. The details of these simulations and results will be presented.
	Slides WEB04 [1.362 MB]

THB03	Design Sudy for Front-End System at Rare Isotope Science Project (RISP)	rfq, ion, ECR, emittance	207
	E.-S. Kim KNU, Deagu, Republic of Korea J. Bahng, J.G. Hwang, S.W. Jang Kyungpook National University, Daegu, Republic of Korea B. Choi, D. Jeon, B. Kim, H. Kim, S.K. Kim IBS, Daejeon, Republic of Korea
	Heavy ion beams of 400 kW and 70 kW are generated at the RISP by in-flight and ISOL methods, respectively. Front-End system in the RISP consists of 28 GHz superconducting ECR-IS with 10 keV/u, LEBT with two-bends and a multi-harmonic buncher, a RFQ with 81.25 MHz and 300 keV/u, and MEBT with two re-bunchers. The design studies have been performed to optimize the beam and accelerator parameters to meet the required design goals. It is shown that the front-end simulations results can provide the two-charge state beams up to uranium to upstream linac with the required beam emittances. In this paper, we present the design results for the front-end system and on the beam dynamics.
	Slides THB03 [1.942 MB]