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Schempp, A.

Paper Title Page
TUPAN018 The Frankfurt Funneling Experiment 1431
 
  • N. Mueller, U. Bartz, D. Ficek, P. Fischer, P. Kolb, A. Schempp, J. Thibus, M. Vossberg
    IAP, Frankfurt am Main
 
  Funneling is a procedure to multiply beam currents at low energies in several stages. The Frankfurt Funneling Experiment is a prototype of such a stage. Our experiment consists of two ion sources, a Two-Beam RFQ accelerator, a funneling deflector and a beam diagnostic system. The two beams from the ion sources are injected into two RFQ beam lines. These two beams are accelerated in a Two-Beam RFQ and combined to one beam axis with a funneling deflector. The last parts of the RFQ electrodes have been replaced to achieve a 3d focus at the crossing point of the two beam axis. The newly designed multigap deflector is adapted to the optimized funneling section. First results and beam measurements with the new setup will be presented.  
TUPAN020 A RFQ-Decelerator for HITRAP 1437
 
  • A. Schempp, B. Hofmann
    IAP, Frankfurt am Main
  • O. K. Kester
    GSI, Darmstadt
 
  The HITRAP linac at GSI will decelerate ions from 5 MeV/u to 6 keV/u for experiments with the large GSI Penning trap. The ions are decelerated at first in the existing experimental storage ring (ESR) down to an energy of 5 MeV/u and will be injected into a new Decelerator-Linac consisting of a IH-structure, which decelerates down to 500keV/u, and a 4-Rod RFQ , decelerating to 5 keV/u. The properties of the RFQ decelerator and the status of the project will be discussed.  
TUPAN021 RFQ and IH Accelerators for the new EBIS Injector at BNL 1439
 
  • A. Schempp, U. Ratzinger, R. Tiede, C. Zhang
    IAP, Frankfurt am Main
  • J. G. Alessi, D. Raparia, L. Snydstrup
    BNL, Upton, Long Island, New York
 
  The new EBIS preinjector at BNL will accelerate ions from the EBIS source with specific mass to charge ratio of up to 6.25, from 17 keV/u to 2000 keV/u to inject into the Booster synchrotron, expanding experimental possibilities for RHIC and NASA experiments. The properties of the RFQ and IH accelerators and the status of the project will be discussed.  
TUPAS102 End-to-End Simulation for the EBIS Preinjector 1874
 
  • D. Raparia, J. G. Alessi, A. Kponou, A. I. Pikin, J. Ritter
    BNL, Upton, Long Island, New York
  • S. Minaev, U. Ratzinger, A. Schempp, R. Tiede
    IAP, Frankfurt am Main
 
  Funding: This manuscript has been authored by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH1-886 with the U. S. Department of Energy. .

The EBIS (Electron Beam Ion Source) Project at Brookhaven National Laboratory is in the second year of a four-year project. It will replace the Tandem Van de Graaff accelerators with an EBIS, an RFQ, and one IH Linac cavity as the heavy ion preinjector for the Relativistic Heavy Ion Collider (RHIC), and for the NASA Space Radiation Laboratory (NSRL). The preinjector will provide all ions species, He to U, (Q/m>0.16) at 2 MeV/amu at a repetition rate of 5 Hz, pulse length of 10–40 μs, and intensities of ~2.0 mA. End-to-end simulations (from EBIS to the Booster injection) as well as error sensitivity studies will be presented and physics issues will be discussed.

#Raparia@bnl.gov

 
THPMN014 Commissioning of the Linac for the Heidelberg Heavy Ion Cancer Therapy Centre (HIT) 2734
 
  • M. T. Maier, W. Barth, W. B. Bayer, L. A. Dahl, L. Groening, C. M. Kleffner, B. Schlitt, K. Tinschert, H. Vormann, S. Yaramyshev
    GSI, Darmstadt
  • U. Ratzinger, A. Schempp
    IAP, Frankfurt am Main
 
  A clinical facility for cancer therapy using energetic proton and ion beams (C, He and O) is under construction and will be installed at the Radiologische Universitätsklinik in Heidelberg, Germany. It consists of two ECR ion sources, a 7 MeV/u linac injector, and a 6.5 Tm synchrotron to accelerate the ions to final energies of 50-430 MeV/u. The linac comprises a 400 keV/u RFQ and a 7 MeV/u IH-DTL operating at 216.8 MHz. The commissioning of the linac with beam was performed in three steps for the LEBT, the RFQ, and the IH-DTL. For this purpose a versatile beam diagnostic test bench has been used consisting of a slit-grid emittance measurement device, transverse pick-ups providing for time of flight energy measurements, SEM-profile grids, and different devices for beam current measurements. In this contribution the procedure and the results of the successful commissioning in the year 2006 of the linear accelerator are reported.  
THPMN015 Longitudinal Electrode Voltage Distribution on a 4-rod RFQ Simulation Model 2737
 
  • P. Fischer, N. Mueller, A. Schempp
    IAP, Frankfurt am Main
 
  For a proper working RFQ with minimized particle losses, a constant longitudinal voltage distribution on the electrodes is needed. This assures a sufficient compensation of the beam space change. The local electrode voltage and its change is mainly given by the varying aperture of the quadrupole and in consequence the changing local capacity. The simulation of the RFQ model with modulated electrodes is a very complex thread. An example for such a model will be given here.