JEFFERSON LAB SEARCH
-
-
Features:
- Conservative Superconducting Cold Fe Design
- Q2 & Q3 are Identical & Cryostable
- Multipole Windings
Specifications:
Q1 Q2/Q3 Gradient 605 G/cm 445 G/cm "Good Field" Radius 22 cm 30 cm Pole Tip Field 1.5 T 1.56 T Radius to Pole 25 cm 35 cm -
Features:
- Flat Racetrack, Cryostable Coils
- No Negative Curvature on Coil
- Graded Air Gap
- Flat Poles
- All Yoke Pieces <20 tons
Specifications:
Gap 421 cm Good Field Width +/- 30 cm Bend Angle 25o Max. Pole Tip Field 1.66 T (6 GeV/c) Dynamic Field Range 10:1 Field Uniformity B/B 0.001 -
Performance of HMS Studied for Two Tunes:
Parallel ⇒ Point Best in plane angle accuracy. Point ⇒ Point Best vertex reconstruction. HMS Transmission Efficiency Studied as Functions of:
- Target location offsets
- Momentum offsets
-
OPTICS TUNE:PARALLEL-PTPT-PT
MOMENTUM:
Maximum Central Momentum
Momentum Bite[(Pmax-Pmin)/P0]
Momentum Resolution delta p/p7.5 GeV/c
18%
<0.1%7.5 GeV/c
18%
<0.1%ACCEPTANCES:
Solid Angle
Min. Central Scattering Angle
>6 msr
12.5o
>6 msr
12.5oAngle Measurement PrecisionIn Scattering Plane
Out-of-Plane -
Pictured is the Hall C detector for the High Momentum Spectrometer (HMS). Contained in a concrete shield house, this detector is used for particle identification after the beam hits the target and the scattered particles are focused onto this detector . The detector contains several instruments that measure different elements of the particles including: drift chambers, hodoscopes, and gas and lead-glass Cerenkov detectors.
-
-
