Author: Geithner, R.
Paper Title Page
TUPF30 Measurements with the Upgraded Cryogenic Current Comparator 583
 
  • F. Kurian, P. Hülsmann, P. Kowina, H. Reeg, M. Schwickert
    GSI, Darmstadt, Germany
  • R. Geithner, R. Neubert, W. Vodel
    FSU Jena, Jena, Germany
  • R. Geithner, W. Vodel
    HIJ, Jena, Germany
 
  Funding: HGS-HiRe for FAIR
For the measurement of the very low ion beam current -down to nA range- foreseen in the High Energy Transport sections of the upcoming FAIR facility, an improved Cryogenic Current Comparator (CCC) is under development at GSI. The existing CCC unit, initially operated at the high energy beam transport section after the GSI synchrotron SIS18, has been upgraded as a prototype for FAIR. The upgraded CCC is presently being re-commissioned. In this contribution we report on beam current measurements with the improved detector unit down to 5 nA simulated by a wire loop wound around the magnetic sensor. As mechanical vibrations strongly influence the sensitive SQUID detector, vibration analyses have been carried out using an accelerometer. Noise contributions from various mechanical as well as electrical sources were studied and the achieved detector performance is presented
 
poster icon Poster TUPF30 [1.702 MB]  
 
TUPF32 A Cryogenic Current Comparator for FAIR with Improved Resolution 590
 
  • R. Geithner, W. Vodel
    HIJ, Jena, Germany
  • R. Geithner, R. Neubert, P. Seidel
    FSU Jena, Jena, Germany
  • F. Kurian, H. Reeg, M. Schwickert
    GSI, Darmstadt, Germany
 
  A Cryogenic Current Comparator is a highly sensitive tool for the non-destructive online monitoring of continuous as well as bunched beams of very low intensities. The noise-limited current resolution of such a device depends on the ferromagnetic material embedded in the pickup coil of the CCC. Therefore, the main focus of research was on the low temperature properties of ferromagnetic core materials. In this contribution we present first results of the completed Cryogenic Current Comparator for FAIR working in a laboratory environment, regarding the improvements in resolution due to the use of suitable ferromagnetic core materials.  
poster icon Poster TUPF32 [3.868 MB]  
 
TUPF32 A Cryogenic Current Comparator for FAIR with Improved Resolution 590
 
  • R. Geithner, W. Vodel
    HIJ, Jena, Germany
  • R. Geithner, R. Neubert, P. Seidel
    FSU Jena, Jena, Germany
  • F. Kurian, H. Reeg, M. Schwickert
    GSI, Darmstadt, Germany
 
  A Cryogenic Current Comparator is a highly sensitive tool for the non-destructive online monitoring of continuous as well as bunched beams of very low intensities. The noise-limited current resolution of such a device depends on the ferromagnetic material embedded in the pickup coil of the CCC. Therefore, the main focus of research was on the low temperature properties of ferromagnetic core materials. In this contribution we present first results of the completed Cryogenic Current Comparator for FAIR working in a laboratory environment, regarding the improvements in resolution due to the use of suitable ferromagnetic core materials.  
poster icon Poster TUPF32 [3.868 MB]