F. Marti

Michigan State University

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

W. Hartung

Michigan State University

R. C. York

Michigan State University

Xiaoyu Wu

China Agricultural University

Chris Compton

Facility for Rare Isotope Beams

Guillaume Machicoane

Facility for Rare Isotope Beams

M. Doléans

Oak Ridge National Laboratory

Terry Grimm

Niowave (United States)

E. Pozdeyev

Thomas Jefferson National Accelerator Facility

John Popielarski

Michigan State University

A. Facco

Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro

Cooperative Institutions

European Organization for Nuclear Research

324

Michigan State University

314

Fermi National Accelerator Laboratory

231

Centre National de la Recherche Scientifique

212

SLAC National Accelerator Laboratory

210

A. Alikhanyan National Laboratory

200

High Energy Accelerator Research Organization

184

Institut National de Physique Nucléaire et de Physique des Particules

169

Deutsches Elektronen-Synchrotron DESY

162

Stanford University

159

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Design study of a superconducting linac for RIA

PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) (2002)

J. Kim D. Gorelov F. Marti Holger Podlech X. G. Wu

The proposed Rare Isotope Accelerator Facility (RIA) requires a heavy-ion driver linac capable of accelerating uranium to 400 MeV/u with the beam powers of 100 to 400 kW. The beam power requirement will be met for very heavy ions by simultaneous acceleration of multiple charge states because of ion source limitations. To minimize the number of accelerating structures, two charge stripping stations have been proposed for nuclei heavier than Kr. The intensity loss due to multiple stripping is minimal by the multiple charge acceleration. However, the technical challenges and concomitant risks of the stripping stations for the proposed beam powers are significant particularly at the lowest energy. As a consequence, an alternative layout with only one stripping station at a point about twice the energy of the lowest energy of the two-station scenario is proposed. This scheme removes one stripping system, but increases the installed accelerator requirement by about 10%. The beam dynamics of the driver linac has been studied using a newly written single particle tracking program as well as other extant programs.

Stripping (fiber)

Beam energy

Tracking (education)

10.1109/pac.2001.987167

Cite

Citations (2)

Beam Dynamics Optimization of FRIB Folding Segment 1 with Single-type Re-buncher Cryomodule

6th Int. Particle Accelerator Conf. (IPAC'15), Richmond, VA, USA, May 3-8, 2015 (2015)

Zhengqi He Masanori Ikegami F. Marti Ting Xu Yan Zhang

Folding (DSP implementation)

10.18429/jacow-ipac2015-thpf136

Cite

Citations (0)

Simulations of Solenoid and Electrostatic Quadrupole Focusing of High Intensity Beams from ECR Ion Source

Proceedings of the 2003 Particle Accelerator Conference (2006)

Quantang Zhao A.I. Balabin M. Doléans F. Marti J. Stetson

Because of its axisymmetric property and reasonable effectiveness, solenoids have been widely used to focus beams at various injectors. For a multi-component beam with solenoidal focusing, beam quality can be significantly deteriorated due to the magnetic focusing strength dependence on the beam charge-to-mass ratio. Electrostatic quadrupole focusing has been explored as an alternative option at the National Superconducting Cyclotron Laboratory (NSCL) for the injection line of the superconducting cyclotrons. We present the results of simulations for both systems.

Solenoid

Quadrupole magnet

10.1109/pac.2005.1590753

Cite

Citations (1)

Design, construction and commissioning of the SuSI ECR

Péter Závodszky B. Arend D. Cole J. DeKamp Guillaume Machicoane

An electron cyclotron resonance ion source (ECRIS) was constructed at the NSCL/MSU to replace the existing SC-ECRIS. This ECRIS operates at 18+14.5 GHz microwave frequencies and it is planned an upgrade to 24-28 GHz in the second phase of commissioning. A superconducting hexapole coil system produces the radial magnetic field; the axial trapping is produced with six superconducting solenoids enclosed in an iron yoke to allow tuning the distance between the plasma electrode and resonant zone in the plasma. We report the details of the design, construction and initial commissioning results of this new ECIS.

Electron cyclotron resonance

Upgrade

Yoke (aeronautics)

Antihydrogen

10.1109/pac.2007.4440110

Cite

Citations (1)

SUPERCONDUCTING COAXIAL RESONATOR DEVELOPMENT FOR ION LINACS AT MICHIGAN STATE UNIVERSITY

W. Hartung S. Bricker Chris Compton Kyle Elliott M. Hodek

Niobium quarter-wave resonators (QWRs) and halfwave resonators (HWRs) are being developed at Michigan State University (MSU) for two projects: a 3 MeV per nucleon (MeV/u) superconducting linac for re-acceleration of exotic ions (ReA3, under construction, requiring 15 resonators), and a 200 MeV/u driver linac for the Facility for Rare Isotope Beams (FRIB, under design, requiring 344 resonators). The QWRs (80.5 MHz, optimum β = v/c = 0.041 and 0.085) are required for both ReA3 and FRIB. Both QWRs include stiffening elements and frictional dampers. Nine β = 0.041 QWRs have been fabricated; seven of them have been Dewar tested successfully with a helium vessel for use in ReA3. Production and testing of ten β = 0.085 QWRs is in progress. The HWRs (322 MHz, optimum β = 0.29 and 0.53) are required for FRIB, but not ReA3. Both HWRs are designed for mechanical stiffness and low peak surface magnetic field. A prototype β = 0.53 HWR has been fabricated and tested, and a prototype β = 0.29 HWR is planned.

Coaxial

Superconducting Super Collider

Cite

Citations (2)

FRIB ACCELERATOR STATUS AND CHALLENGES

J. Wei EP Bernard Nathan Bultman F. Casagrande S. Chouhan

The Facility for Rare Isotope Beams (FRIB) at MSU includes a driver linac that can accelerate all stable isotopes to energies beyond 200 MeV/u at beam powers up to 400 kW. The linac consists of 330 superconducting quarter- and half-wave resonators operating at 2 K temperature. Physical challenges include acceleration of multiple charge states of beams to meet beam-on-target requirements, efficient production and acceleration of intense heavy-ion beams from low to intermediate energies, accommodation of multiple charge stripping scenarios (liquid lithium, helium gas, and carbon foil) and ion species, designs for both baseline in-flight fragmentation and ISOL upgrade options, and design considerations of machine availability, tunability, reliability, maintainability, and upgradability. We report on the FRIB accelerator design and developments with emphasis on technical challenges and progress.

Upgrade

Maintainability

Source

Cite

Citations (11)

Magnetic Elements for the A1900 Fragment Separator at the NSCL

Advances in cryogenic engineering (1998)

A. Zeller J. DeKamp D. Johnson F. Marti D. J. Morrissey

Fragment (logic)

Separator (oil production)

10.1007/978-1-4757-9047-4_28

Cite

Citations (23)

The ORNL Radioactive Ion Beam Project

D.K. Olsen G.D. Alton R.L. Auble C. Baktash D.T. Dowling

On June 30, 1992, the Holifield Heavy Ion Research Facility (HHIRF) was shut down as an operating national users' facility for heavy ion physics research and became a construction project to reconfigure the existing accelerator system and develop a first generation radioactive ion beam (RIB) facility. During its 11 years of operation, the HHIRF had over 600 users, of which 200 were graduate students. During this time, nearly 39,000 hours of beam were delivered as beam-on-target for nuclear, atomic, and applied research. All together, 69 different isotopes from 36 different elements were accelerated for scheduled experiments. Most beams were produced with only the 25-MV tandem accelerator; however, for the most energetic beams and the heaviest ions, the Oak Ridge Isochronous Cyclotron (ORIC) was used as an energy booster. This paper will briefly review the concept of the ORNL RIB project and describe the progress being made on the various hardware components and physics factors required to produce RiBs with the HHIRF accelerator system.

Shut down

Source

Cite

Citations (2)

An internal timing probe for use in the MSU K1200 cyclotron

Proceedings Particle Accelerator Conference (2002)

J. Bailey J. Kuchar F. Marti J. Ottarson

A probe was installed in the K1200 to measure the internal beam time structure as a function of radius. Using the fast rise times of a Si detector, which was specially cut to extend the active area to within 150 /spl mu/m of the detector edge, the time of arrival of the heavy ions on the detector is measured with respect to the accelerating RF voltage. Limited to count rates of several kHz, use of the detector requires attenuation of the injected beam, and permits studies of single particle beam dynamics.

10.1109/pac.1995.504663

Cite

Citations (2)

Overview of Beam Diagnostic Systems for FRIB

4th International Beam Instrumentation Conference (IBIC2015), Melbourne, Australia, 13-17 September 2015 (2016)

S. Lidia S. Cogan Dylan Constan-Wahl Jenna Crisp Masanori Ikegami

10.18429/jacow-ibic2015-mopb071

Cite

Citations (1)