GSI - BEA Wiki

The CCC acts as a cryogenic DC beam current transformer. It measures the intensity of lowest beam currents, circulating in storage rings, or extracted through high energy beam transport lines, respectively. The presently best values, obtained with a thin-film DC SQUID at 4 K, are:

• current resolution < 250 pA/sqrt(Hz)
• bandwidth > 50 kHz
• zero drift < 4 pA/s

Kicked off by this magazine article the CCC project at GSI was launched, back in 1991:

The new project was started for the upcoming FAIR facilities, and is based on the old CCC (GSI/FSU Jena - A. Peters e. a.). Collaborations with the Friedrich-Schiller-University of Jena/Dept. for Solid-State Physics, and the Max-Planck-Institute in Heidelberg will enforce research, development and construction of CCCs for FAIR and CSR.

Technical drawings of the old CCC (incomplete): drawings

Publications highlighting the CCC: papers