| Paper | 
        Title | 
        Page | 
    
    
        | WEPS037 | 
        RF Design of a 325 MHz 4-ROD RFQ | 
        2568 | 
    
    
        |   | 
        
                - B. Koubek, A. Schempp, J.S. Schmidt
 
                       IAP, Frankfurt am Main, Germany 
                - L. Groening
 
                       GSI, Darmstadt, Germany 
          | 
          | 
    
        
            |   | 
            
            Usually 4-ROD Radio Frequency Quadrupoles (RFQ) are built for frequencies up to 216 MHz. For higher frequencies 4-VANE structures are more common. The advantages of 4-Rod structures, the greater flexibility for tuning and being more comfortable for maintenance, are motivating the development of a 4-Rod RFQ for higher frequencies than 216 MHz. In particular a 325 MHz RFQ with an output energy of 3 MeV is needed for the proton linac for the FAIR project of GSI. This paper reports about the design studies and the latest developments of this RFQ.
             | 
              | 
          
        
            |   | 
        
    
        | WEPS041 | 
        Tuning of the New 4-Rod RFQ for FNAL | 
        2580 | 
    
    
        |   | 
        
                - J.S. Schmidt, B. Koubek, A. Schempp
 
                       IAP, Frankfurt am Main, Germany 
          | 
          | 
    
        
            |   | 
            
            For the injector upgrade at FNAL a 4-rod Radio Frequency Quadrupole (RFQ) with a resonance frequency of 200 MHz has been build. With this short structure of only 1.3 m a very compact injector design has been realized. Simulations with CST Microwave Studio® were performed for the design. Their results leading to the RF characterizations of the RFQ and the final RF setup which has been accomplished at IAP of the Goethe-University Frankfurt are presented in this paper.
             | 
              | 
          
        
            |   |