S-2S Spectrometer for Ξ^- hypernuclera spectroscopy

New magnetic spectormeter, S-2S is designed to achieve a momentum resolution
of Δp/p=5×10^-4 (FWHM) for a mementum range of 1.2-1.6 GeV/c.
The momentum resolution (Δp/p=5×10^-4 in FWHM) is necessary to measure
the Ξ^- hypernuclear state as a peak structure with an energy resolution of
a few MeV in FWHM at the Hadron Experimental Hall K1.8 Beam Line in J-PARC.
The S-2S consists of two quaruple magnets (Q1,Q2) and one dipole magnet (D).
A particle detector system is composed of a TOF detector for data taking trigger and
off-line Particle IDentification (PID), three drift chambers for particle tracking,
two types of Cherenkov detectors for on-line PID.

FIG1: S-2S spectrometer (ver. 29Aug2014) [png] [pdf]

CAD drawing

S-2S 3D drawing made by T.Takahashi (.dwg) [uploaded on 2014/8/8]
S-2S 3D drawing + Beam line, which was made by T.Takahashi (.dwg) [uploaded on 2014/9/10]
Base idea (2014/10/10): pdf
Assent of the base (2014/12/18): 1(front cover), 2(D), 3(Q1 and Q2)
Inspection report of the base (2015/3/25): pdf

Schematic drawings

S-2S + Beam line spectrometer (.png) (.bmp) (.ai) [uploaded on 2014/9/11]

Magnetic field map

S-2S magnetic field map made by S.Kanatsuki (.tar.gz) [uploaded on 2014/8/8]

TOSCA models

S-2S_Dipole_model1.opc: Modeled by S. Kanatsuki (uploaded on 2015/12/21)
S-2S_Dipole_model2.opc: Modeled by S. Kanatsuki (uploaded on 2015/12/21) → better ?
BH data.bh: Tuned by S. Kanatsuki (uploaded on 2015/12/21)

Monte Carlo simulation

Geant4 simulation code (.tar) (updated on 2018/10/12)
(Originally made by S.Kanatsuki. Modified by Toshiyuki Gogami.)
→ How to use

S-2S Spectrometer for Ξ- hypernuclera spectroscopy