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Title: A Bulk Superconducting Magnetic System for the CLAS12 Target at Jefferson Lab

A feasibility study of a bulk magnetic system for the target of an experiment to measure the transverse spin effects in semi-inclusive deep inelastic scattering (SIDIS) at 11 GeV with a transversely polarized target using the CLAS12 detector is presented. An experiment has been approved with the highest priority rating to study spin azimuthal asymmetries in SIDIS using 11-GeV polarized electron beams from the upgraded CEBAF facility and the CLAS12 detector equipped with a transversely polarized target. The transverse target in CLAS12 requires the shielding of a volume inside the longitudinal field of the main solenoid. In the shielded region, a transverse target magnet can operate; for the proposed magnetic configuration, the main solenoid maximum magnetic induction is 2 T. A bulk MgB2 cylinder cooled in liquid helium is proposed both to shield the longitudinal field of the main solenoid and to provide a transverse field induction up to 1.2 T for the hydrogen deuteride ice (HD-ice) target. The installation and magnetization procedure will be described. The magnetization procedure has to be compatible with the polarization and installation procedure of the HD-ice target. The design of a test bench to measure the transverse magnetization of a MgB2 bulk cylinder cooledmore » by a coldhead is presented together with the scheduled measurements.« less
 [1] ;  [1] ;  [2] ;  [1] ;  [3] ;  [3]
  1. INFN, Ferrara, Italy
  2. Universite di Ferrara, Ferrara, Italy
  3. JLAB
Publication Date:
OSTI Identifier:
Report Number(s):
JLAB-PHY-14-1964; DOE/OR/23177-3358
DOE Contract Number:
Resource Type:
Resource Relation:
Journal Name: IEEE Trans.Appl.Supercond.; Journal Volume: 25; Journal Issue: 3; Conference: ASC 2014, 10-15 Aug 2014. Charlotte, NC, USA
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States