Hyperfine Interactions

, Volume 201, Issue 1–3, pp 69–71 | Cite as

Jefferson Lab injector development for next generation parity violation experiments



To meet the challenging requirements of next generation parity violation experiments at Jefferson Lab, the Center for Injectors and Sources is working on improving the parity-quality of the electron beam. These improvements include new electron photogun design and fast helicity reversal of the Pockels Cell. We proposed and designed a new scheme for slow helicity reversal using a Wien Filter and two Solenoids. This slow reversal complements the insertable half-wave plate reversal of the laser-light polarization by reversing the electron beam polarization at the injector while maintaining a constant accelerator configuration. For position feedback, fast air-core magnets located in the injector were commissioned and a new scheme for charge feedback is planned.


Parity violation Inverted Photogun Wien filter Helicity reversal Position feedback Pockels cell 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Horowitz, C.J., et al.: Parity violating measurements of neutron densities. Phys. Rev. C63, 025501 (2001)ADSGoogle Scholar
  2. 2.
    Van Oers, W.T.H.: The QWeak experiment. Nucl. Phys. A790, 81–87 (2007)ADSGoogle Scholar
  3. 3.
    Adderley, P.A., et al.: A load-locked DC high voltage GaAs photogun with an inverted-geometry ceramic insulator. Phys. Rev. ST Accel. Beams 13, 010101 (2010)ADSCrossRefGoogle Scholar
  4. 4.
    Armstrong, D.S, Moffit, B., Suleiman, R.: Target density fluctuations and bulk boiling in the hall a cryotarget. JLab Technical Note JLAB-TN-03-017 (2003)Google Scholar

Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • J. Grames
    • 1
  • J. Hansknect
    • 1
  • M. Poelker
    • 1
  • R. Suleiman
    • 1
  1. 1.Jefferson LabNewport NewsUSA

Personalised recommendations