Author: Alt, D.M.
Paper Title Page
THPRO129 Online Modeling of the Rare Isotope Reaccelerator - ReA3 3195
 
  • W. Wittmer, D.M. Alt, S.W. Krause, D. Leitner, S. Nash, R. Rencsok, J.A. Rodriguez, M.J. Syphers, X. Wu
    NSCL, East Lansing, Michigan, USA
 
  Funding: Work supported by Michigan State University
With the installation and commissioning of the third accelerating cryomodule in summer of 2014 the first phase of the radioactive ion beams postaccelerator ReA at National Superconducting Cyclotron Laboratory (NSCL) at Michigan State University (MSU) will be completed. ReA was integrated in 2013 into the Coupled Cyclotron Facility providing unique low-energy rare isotope beams. After the fast rare isotopes are stopped in a gas stopping system, mass separated and their charge state boosted in an Electron Beam Ion Trap (EBIT), the ions are reaccelerated in a compact superconducting (SC) LINAC. For rare isotope operations, the LINAC is pre-tuned using stable pilot beams with a similar mass to charge ratio as the rare isotope beams and consequently the system is scaled. Scaling steps of up to 5\% are needed to change to the radioactive beams. To preserve the stringent beam characteristic on the experimental end station a precise online model is required. We will present the status of this online model.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPRO129  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
THPME051 Preparatory Investigations for a Low Frequency Prebuncher at ReA 3342
 
  • D.M. Alt, J.F. Brandon, D. Leitner, D. Morris, M.J. Syphers, N.R. Usher, W. Wittmer
    NSCL, East Lansing, Michigan, USA
 
  The ReA reaccelerator facility at the National Superconducting Cyclotron Laboratory (NSCL) at Michigan State University (MSU) will provide a unique capability to study reactions with low-energy beams of rare isotopes. A beam from the coupled cyclotron facility is stopped in a gas stopping system, charge bred in an Electron Beam Ion Trap (EBIT), and then reaccelerated in a compact superconducting LINAC. At present the beam repetition rate at the ReA targets is the same as the LINAC RF frequency of 80.5 MHz. A lower frequency would be desirable for many types of experiments using time of flight data acquisitions. Studies were undertaken to investigate possible methods of reducing the beam frequency with minimal reduction in overall beam current. This paper reports the results of preliminary design studies of such a low frequency prebuncher designed to increase the pulse separation and minimize bunch lengths at the detector.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME051  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
THPME052 Measurement of the Longitudinal Acceptance of the ReA RFQ 3346
 
  • D.M. Alt, S.W. Krause, A. Lapierre, D. Leitner, S. Nash, R. Rencsok, J.A. Rodriguez, M.J. Syphers, W. Wittmer
    NSCL, East Lansing, Michigan, USA
 
  The ReA reaccelerator facility at the National Superconducting Cyclotron Laboratory (NSCL) at Michigan State University (MSU) will provide a unique capability to study reactions with low-energy beams of rare isotopes. A beam from the coupled cyclotron facility is stopped in a gas stopping system, charge bred in an Electron Beam Ion Trap (EBIT), and then reaccelerated in a compact superconducting LINAC. The beam is injected into the LINAC by a room-temperature Radio Frequency Quadrupole (RFQ) combined with an external Multiharmonic Buncher. (MHB) In preparation for future upgrades to the capabilities of the ReA, an accurate determination of the longitudinal acceptance of the RFQ was conducted using a stable ion beam from a test source. This paper presents the results of the acceptance measurement, including empirical confirmation of a predicted asymmetry in the shape of the acceptance window.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME052  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)