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Bechtold, A.

Paper Title Page
MOPP111 Beam Tests with the MAFF IH-RFQ at the IAP-Frankfurt 817
 
  • H. Z. Zimmermann, D. Habs
    LMU, München
  • A. Bechtold, P. Kolb, A. Schempp
    IAP, Frankfurt am Main
 
  The IH-type RFQ for the MAFF project at the LMU Munich is integrated into a test bench at the IAP in Frankfurt. The existing IH-RFQ set-up is the second after the HIS at GSI and the first one that can be directly compared to a very similar 4-rod type machine, the REX-ISOLDE RFQ at CERN. The test bench consists of an ionsource, an electrostatic quadrupole lens system with implemented steerers, and several beam diagnostic like a two dimensional emittance scanner, bending magnet and a fast faraday cup. Experimental results will be presented. These tests accompanied with theoretical investigations will be done with special respect to the applicability of such normal conducting RFQ accelerators to the EURISOL post accelerator.  
MOPP149 Recent Developments of the Superconducting CH-Cavities 901
 
  • H. Podlech, A. Bechtold, M. Busch, F. Dziuba, H. Liebermann, U. Ratzinger
    IAP, Frankfurt am Main
 
  The Crossbar-H-mode (CH)-structure which has been developed at the IAP in Frankfurt is a multi-cell drift tube structure for the efficient acceleration of low and medium energy protons and ions. The superconducting low energy CH-prototype cavity has reached gradients of up to 7 MV/m, corresponding to an effective voltage gain of 5.6 MV. This shows that high real estate gradients can be achieved in superconducting low energy multi-cell cavities. Additionally, microphonics and tuning measurements have been performed at room temperature and at 4K. Optimized cavity geometry for high power beam projects and plans for the construction of a new superconducting cavity will be presented.  
THPP080 A Superconducting CH-Linac for IFMIF 3548
 
  • H. Podlech, A. Bechtold, M. Busch, F. Dziuba, H. Klein, H. Liebermann, U. Ratzinger, R. Tiede, C. Zhang
    IAP, Frankfurt am Main
 
  The IFMIF accelerator which has to provide a 40 MeV 250 mA Deuteron beam requires a duty cycle of 100%. The IAP Frankfurt has proposed 175 MHz H-type drift tube linac consisting of an IH-cavity and a chain of superconducting CH-cavities. A superconducting CH-prototype cavity has been tested very successfully and reached effective gradients of 7 MV/m. Two rf power couplers are necessary to feed one CH-cavity. The maximum rf power per cavity is approximately 500 kW. As amplifiers the originally foreseen 1 MW tubes or 300 kW tubes can be used. The focusing scheme in the CH-linac is based on superconducting solenoids. Beam dynamics simulations have been performed with an error analysis using the LORASR code based on the KONUS dynamics. An updated and improved linac design will be presented. A contribution of IAP for the EVEDA phase could consists of the construction and the test of the room temperature IH-cavity and the first complete CH cryo-module. A study together with industry has been already performed regarding the production process and the system integration of auxiliary equipment like couplers and tuner.