Consists of two protons and one neutron. Calculable 3-body nuclear system.
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Taking a better look at the 3 He Nucleus through the Quasi-Elastic 3 He(e,e’d) Reaction By Xiaohui Zhan for the E05-102 Collaboration  Consists of two protons and one neutron. Calculable 3-body nuclear system. Faddeev calculations predict three components dominate the 3 He ground- state wave-function. Impact: all experiments using polarized 3He as an effective polarized neutron target. S 90% of averaged wave function, “ neutron target”. S’ 1.5% mixed symmetry. D 8.5% generated by tensor force of N-N force. • Neutron electromagnetic form factors. • Polarized nucleon spin structure. BigBite Spectrometer • Consists of a single dipole magnet followed by a detector system. • Large solid angle and large momentum acceptance. • Allow for excellent discrimination between deuterons and protons after incorporating 2-wire chamber assembly. Original SRC Frame New Frame Trigger Plane • Consists of 24 scintillator bars. • ΔE: 500x86x3mm 3 E: 500x86x30mm 3 . • Further particle identification. Why Polarized 3 He? Experiment Equipment What to Measure? , [ ][ ] [ ][ ] xz d d d d A d d d d The (+/-,+/-) signs represent the beam helicities and the projections of the target spin along the quantization axis (x for A x and z for A z ). Bonus: Parasitic Measurement of G E n • Systematic limited measurements. • The expected statistical uncertainty of the parasitic measureme of G E n is shown with conservative estimate 0.0039. A naïve estimate of the sensitivity of A x and A z on the “amount” of S’ component in the 3 He wave function. Our expected statistical uncertainties are also shown. D density distribution of dp cluster in 3 He.
description
The (+/-,+/-) signs represent the beam helicities and the projections of the target spin along the quantization axis ( x for A x and z for A z ). BigBite Spectrometer. Consists of a single dipole magnet followed by a detector system. Large solid angle and large momentum acceptance. - PowerPoint PPT Presentation
Transcript of Consists of two protons and one neutron. Calculable 3-body nuclear system.
Taking a better look at the 3He Nucleusthrough the Quasi-Elastic 3He(e,e’d) Reaction
By Xiaohui Zhan for the E05-102 Collaboration

Consists of two protons and one neutron. Calculable 3-body nuclear system. Faddeev calculations predict three components
dominate the 3He ground-state wave-function.
Impact: all experiments using polarized 3He as an effective polarized neutron target.
• S 90% of averaged wave function, “ neutron target”.
• S’ 1.5% mixed symmetry.
• D 8.5% generated by tensor force of N-N force.
• Neutron electromagnetic form factors.
• Polarized nucleon spin structure.
BigBite Spectrometer
• Consists of a single dipole magnet followed by a detector system.
• Large solid angle and large momentum acceptance.
• Allow for excellent discrimination between deuterons and protons
after incorporating 2-wire chamber assembly.
Original SRC Frame
New Frame
Trigger Plane
• Consists of 24 scintillator bars.
• ΔE: 500x86x3mm3
E: 500x86x30mm3.
• Further particle identification.
Why Polarized 3He? Experiment Equipment What to Measure?
,
[ ] [ ]
[ ] [ ]x z
d d d dA
d d d d
The (+/-,+/-) signs represent the beam helicities and
the projections of the target spin along the quantization
axis (x for Ax and z for Az).
Bonus: Parasitic Measurement of GEn
• Systematic limited measurements.
• The expected statistical uncertainty of the parasitic measurement
of GEn is shown with conservative estimate 0.0039.
A naïve estimate of the sensitivity of Ax and Az on the “amount” of S’ component in the 3He wave function. Our expected statistical uncertainties are also shown.
3D density distribution of dp cluster in 3He.
