Moeller Polarimeter

This Moeller Polarimeter is used in Hall A of Jefferson Lab (former CEBAF) in order to measure the polarization of the electron beam. It consists of a polarized target, a magnetic channel consisting of 3 quadrupoles and one dipole and of a detector made of lead glass and scintillators.

This page resides in JLAB and is regularly updated. A good page on this polarimeter with a lot of details on the design is residing in University of Kentucky

Institutions

• Jefferson Lab
• University of Kentucky
• Kharkov Institute of Physics&Technology

General Documentation

• Design documents: see in University of Kentucky
• OSP - Operation Safety Procedure contains a detailed information on the polarimeter.
• Layout and the optics (ps format)
• Quad settings (ps.gz format) (Author: V.Gorbenko )
• Helicity signals
• Electronics
• Upgrade Project Phase I
  
• Upgrade Project  Phase II
• LED Generator
• Polarized target
• Polarized target (old page)
• Polarized target measurements
• Polarized target motor measurements
• Polarized target motor measurements -2
  
• Target polarization dependence of the foil tension
• Hints on Target Magnetization Measurement
• Target heating by the beam
• New Moller target holder
• Start/stop procedure
• New Detector design (draft updated) (ps.gz format)
• Data analysis: manual
• Data analysis: details
• Remote connections to the the VME boards, HV etc
• Control of the collimator and the slide
• How to start Moller DAQ with CODA 2.2 on Linux computer 
• Moller Polarimeter Slow Control 
• List of programs using for Moller DAQ
• Beam line: new quads downstream of Moller
• Simulation with GEANT
• High Field Upgrade

Polarization measurements

• The sign of beam polarization
• Raw results of the polarization measurements 
• Summaries for the running experiments
• E94-010, Sep-Dec 1998
• HAPPEX, April-May 1999
• HAPPEX, July 1999
• HAPPEX, 1999 systematic errors (talk).
• E89-012, E94-019, July-November 1999
• E93-049, 4He(e,e'p)3H , Apr-May 2000
• E91-011, N-->D, May-July 2000
• E99-007, GE_P(II), November-December
• E97-110, GDH, July-August 2003
• Spin dance measurements
• Results of commissionning and studies of the systematics
• Results of tests with the unpolarized beam, March 98.
• The signs of polarizations of the target and of the beam.
• Laser's phase influence on the beam polarization.
• "Results Unique electron polarimeter analyzing power comparison and precision spin-based energy measurement"
  Phys. Rev. Special topics - accelerator and beams,Vol.7,042802(2004) (pdf file)

Projects and development

• Proposal to upgrade the polarimeter to 11 GeV beam ps.gz, pdf
• Feasibility studies: using atomic hydrogen target

Literature

• Literature on polarimetry - Moeller and some other

Picture Archive

• Hall A Moeller polarimeter
• New targert design

Links to Other Polarimeters

• Hall C Moeller polarimeter
• Hall A Compton polarimeter