A bulk superconducting MgB cylinder for holding transversely polarized targets
- Univ. di Ferrara and INFN, Ferrara (Italy)
- Istituto Nazionale di Fisica Nucleare (INFN), Ferrara (Italy)
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Istituto Nazionale di Fisica Nucleare (INFN), Bari (Italy)
An innovative solution is being pursued for the challenging magnetic problem of producing an internal transverse field around a polarized target, while shielding out an external longitudinal field from a detector. A hollow bulk superconductor can trap a transverse field that is present when cooled through its transition temperature, and also shield its interior from any subsequent field changes. Here, a feasibility study with a prototype bulk MgB2 superconducting cylinder is described. Promising measurements taken of the interior field retention and exterior field exclusion, together with the corresponding long-term stability performance, are reported. In the context of an electron scattering experiment, such a solution minimizes beam deflection and the energy loss of reaction products, while also eliminating the heat load to the target cryostat from current leads that would be used with conventional electromagnets.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP); Istituto Nazionale di Fisica Nucleare (INFN)
- Grant/Contract Number:
- AC05-06OR23177
- OSTI ID:
- 1419740
- Alternate ID(s):
- OSTI ID: 1549055
- Report Number(s):
- JLAB-PHY-18-2611; DOE/OR/-23177-4350; PII: S0168900217311336; TRN: US1801380
- Journal Information:
- Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 882, Issue C; ISSN 0168-9002
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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