The Super HMS [electronic resource].
- Washington, D.C. : United States. Dept. of Energy. Office of Energy Research, 1998. and Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- 102.4 Kilobytes pages : digital, PDF file
- Additional Creators:
- Thomas Jefferson National Accelerator Facility (U.S.), United States. Department of Energy. Office of Energy Research, and United States. Department of Energy. Office of Scientific and Technical Information
- Restrictions on Access:
- Free-to-read Unrestricted online access
- As a part of physics instrumentation development for TJNAF long range institution upgrade plan, a 12 GeV/c Super High Momentum Spectrometer (the Super HMS) has been proposed for high luminosity and high q2 physics in endstation Hall C. The fundamental configuration of Super HMS is QQDD. Two identical quadrupoles are the superconducting HMS Q1s with maximum gradient 8 Tesla/m. Two identical SLAC B202/B203 dipole magnets are considered for the use of dispersive elements with accumulative bending power 18.7 degree at 12 GeV/c while the central field is set to 2.05 Tesla. A sliding mechanism could guide the whole system, including the magnetic elements and detector house, moving forwards and backwards by +/- 100 cm. Under an assumed magnetic structure, the Super HMS optics performance has been studied by using TRANSPORT, TURTLE, and RAYTRACE codes and related reconstruction methods. The applicable solid angle can be adjusted between 1 msr and 2.3 msr. The maximum central momentum is 12 GeV/c. The reconstructed momentum resolution within full momentum range 20% is better than 10-3. The in-plane angle reconstruction accuracy is about 0.5 mr, mainly determined by the local multiple scattering from detector materials. This report also points out the strategy of super HMS optics adapting low rigidity quadrupoles for the use of high momentum operation, and the potential capability of very forward angle operations.
- Published through SciTech Connect., 06/01/1998., "jlab-phy-98-71", " doe/er/40150-3507", Jefferson Lab Physics & Instrumentation with 6-12 GeV Beams, Newport News, VA, 06/15/1998--06/18/1998., and Chen Yan.
- Funding Information:
View MARC record | catkey: 14692151