A double-arm Møller Polarimeter for Jefferson Lab's Hall B

Details A double-arm Møller Polarimeter for Jefferson Lab's Hall B A double-arm Møller Polarimeter for Jefferson Lab's Hall B

Oct 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aps..dnp..b711g&link_type=abstract

Geophysical Research Letters, v. 24, No. 17, p. 2171 (1997).

Physics

5465 Planetology: Solid Surface Planets, Rings And Dust, 6015 Planetology: Comets And Small Bodies, Dust

Scientific paper

We have constructed and commissioned a double-arm Møller polarimeter for the Hall B beamline at the Thomas Jefferson National Accelerator Facility. The polarimeter measures the longitudinal polarization of the 0.8-4.0 GeV electron beam as it enters the experimental hall. The primary components of the apparatus are a target chamber, a pair of quadrupole magnets, and a pair of lead/scintillating-fiber detectors. The target chamber contains two 20 μm-thick permendur foils tilted at ± 20^o with respect to the beam axis. A target polarization of approximately 8% is produced along the beam direction by a 90 G (nominal) magnetic field generated by a pair of Helmholtz coils. The scattered Møller-electron pairs are directed toward the detectors by the quadrupoles. The quadrupoles are are individually tuned--depending on the beam energy--to center the peak of the Møller asymmetry (θ_c.m.=90^o) onto the fixed detectors. The real-to-accidental coincident-detection rate is better than 200:1. The beam polarization can be measured to a 3% relative statistical precision in less than 30 minutes with a relative systematic uncertainty of less than 5%.

Affiliated with

Also associated with

No associations

Rating

A double-arm Møller Polarimeter for Jefferson Lab's Hall B does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A double-arm Møller Polarimeter for Jefferson Lab's Hall B, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A double-arm Møller Polarimeter for Jefferson Lab's Hall B will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1720848