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Design of a Cryogenic Calorimeter for Synchrotron Light Source Beam-Based Heating

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4 Author(s)
Trillaud, F. ; Lawrence Berkeley Nat. Lab., Berkeley, CA, USA ; Prestemon, S. ; Schlueter, R.D. ; Marks, S.

Superconducting insertion devices using Nb3Sn conductors offer the potential of higher brightness photon beams and enhanced spectral range over existing permanent magnet technology. However, Nb3Sn is a low temperature superconductor that must be operated at temperatures near 4.2 K. At these temperatures, any small heat dissipation can potentially be sufficient to lose the superconducting state of a section of a superconducting electromagnet. To quantify the amount of power deposited on the winding emanating from beam-induced heating on a storage ring, we propose a diagnostic calorimeter that will be temporarily integrated into the synchrotron ring. The design of the calorimeter is discussed and the various heat input sources, expected to disturb the operation of a superconducting electromagnet, are reviewed.

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Applied Superconductivity, IEEE Transactions on  (Volume:19 ,  Issue: 3 )