IBIC2013 - List of Authors (Reeg, H.)

Paper

Title

Page

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 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 TUPF32 [3.868 MB]

WEPF31

A FESA DAQ for Fast Current Transformer in SIS 18

894

O. Chorniy, H. Bräuning, T. Hoffmann, H. Reeg, A. Reiter
GSI, Darmstadt, Germany

This contribution presents the development of the data acquisition (DAQ) system for the readout of fast beam current transformers (FCT) as installed in the GSI synchrotron SIS18 and as foreseen in several FAIR ring accelerators. Fast current transformers are reliable devices that offer a large analogue bandwidth and can therefore monitor bunch structures with high resolution. At appropriate sampling rates continuous measurements throughout repeated machine cycles lead to a large amount of raw data. The analysis of those raw data may range from simple bunch parameter calculations to complex longitudinal phase space reconstructions. Consequently, a new DAQ system must be carefully designed to allow for flexible acquisition modes or to allow for data reduction methods in special applications. The aims of the development are discussed and the status of the new DAQ is presented.

Poster WEPF31 [2.307 MB]

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 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 TUPF32 [3.868 MB]

WEPF31	A FESA DAQ for Fast Current Transformer in SIS 18	894
	O. Chorniy, H. Bräuning, T. Hoffmann, H. Reeg, A. Reiter GSI, Darmstadt, Germany
	This contribution presents the development of the data acquisition (DAQ) system for the readout of fast beam current transformers (FCT) as installed in the GSI synchrotron SIS18 and as foreseen in several FAIR ring accelerators. Fast current transformers are reliable devices that offer a large analogue bandwidth and can therefore monitor bunch structures with high resolution. At appropriate sampling rates continuous measurements throughout repeated machine cycles lead to a large amount of raw data. The analysis of those raw data may range from simple bunch parameter calculations to complex longitudinal phase space reconstructions. Consequently, a new DAQ system must be carefully designed to allow for flexible acquisition modes or to allow for data reduction methods in special applications. The aims of the development are discussed and the status of the new DAQ is presented.
	Poster WEPF31 [2.307 MB]