Main Page
From PREX Wiki
Jump to navigationJump to searchPREX Wiki
The Lead Radius Experiment ("PREX"), experiment number E06002, uses the parity violating weak neutral interaction to probe the neutron distribution in a heavy nucleus, namely 208Pb, thus measuring the RMS neutron radius to 1% accuracy, which has an important impact on nuclear theory.
Spokespersons: Krishna Kumar (U. Mass), Paul Souder (Syracuse), Robert Michaels (JLab), Guido Urciuoli (INFN).
Physics Info
- 2005 Latest Proposal Update (Postscript), and Same, PDF.
- 2002 Earlier Proposal Update
- Original Proposal (Dec 1999).
- PREX Official Web Site (has more physics info)
Status and Plans
- A shutdown work list (updated Dec 2009) Schedule is March 2010 !
- An index of Meeting Minutes and Talks
- more details on status
- Working on a new Monte Carlo.
- Here are recent (Dec 5, 2007) diagrams of the 18-bit ADC and the somewhat older schematic from Fernando Barbosa.
- Here is Paul's note on slits for transverse asymmetry systematic (March, 2009).
- SEPTUM
- Here is a Test plan for Septum magnet to be done in Nov 2009 .
- Some drawings of the 5 degree septum courtesy M. Hodges. See also sept*.pdf in pics
- COLLIMATOR
- Overview of collimator to put in the mouth of Q1.
- Some specs for collimator to help engineer it.
- Possible way to stop 2-bounce photons
- The specification to taper the sides to reduce slit scattering.
- TARGET
- Oct 2009 Proposed target ladder:
- During the optics and calibration phase
- During the production mode
- Target info for the Jan 2008 test run.
- Here are Design Drawings from J. Miller. And here are assembly pics (was for the Jan 2008 test run)
- Early tests Pb target. See diagram of target and writeup about test (postscript) and same, PDF
- Oct 2009 Proposed target ladder:
- Polarimetry is crucial.
- Here is a specification for Moller FADC DAQ.
- In 2003 JLab held a Polarimetry Workshop
- There is an idea to use atomic hydrogen polarimetry.
- Here is a draft of plans to upgrade the Compton polarimeter.
- In Nov 2005 we had a 2 day run to test all aspects of the experiment at ~850 MeV. Results were explained in the 2005 propsal update (see talks, below).
Talks (including seminars and PAC Defenses)
- Here was the recent PREX workshop 2008 held at JLAB.
- Here are some talks about PREX at workshops, etc.
- An index of Collaboration Meetings and Weekly Meetings plus some older stuff.
Slides
- Here are some old transparencies.
External Links
Contributing to this PREX wiki
- To get a new account: click login.
- Where the page invites you to obtain an account click "request one" and follow the instructions.
- I'll get an e-mail, will approve you and you'll get a password by e-mail.
Consult the User's Guide for information on using the wiki software.
div class="right"><a href="">Top of page</a>
MediaWiki has been successfully installed.
