MEASURED AND CALCULATED LOSSES IN A MODEL DIPOLE FOR GSI'S HEAVY ION SYNCHROTRON.
The new heavy ion synchrotron facility proposed by GSI will have two superconducting magnet rings in the same tunnel, with rigidities of 300T{center_dot}m and 10OT{center_dot}m. Fast ramp times are needed. These can cause problems of ac loss and field distortion in the magnets. For the high energy ring, a lm model dipole magnet has been built, based on the RHIC dipole design. This magnet was tested under boiling liquid helium in a vertical dewar. The quench current showed very little dependence on ramp rate. The ac losses, measured by an electrical method, were fitted to straight line plots of loss/cycle versus ramp rate, thereby separating the eddy current and hysteresis components. These results were compared with calculated values, using parameters which had previously been measured on short samples of cable. Reasonably good agreement between theory and experiment was found, although the measured hysteresis loss is higher than expected in ramps to the highest field levels.
- Research Organization:
- BROOKHAVEN NATIONAL LABORATORY (US)
- Sponsoring Organization:
- DOE/OFFICE OF SCIENCE (US)
- DOE Contract Number:
- AC02-98CH10886
- OSTI ID:
- 15007357
- Report Number(s):
- BNL-72207-2004-CP; R&D Project: 89441; FOREIGN; TRN: US200429%%1492
- Journal Information:
- IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY (2004), Vol. 14, Issue 2; Conference: 18TH INTERNATIONAL CONFERENCE ON MAGNET TECHNOLOGY (MT18), MORIOKA (JP), 10/20/2003--10/24/2003; Other Information: PBD: 15 Jun 2003
- Country of Publication:
- United States
- Language:
- English
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