Daniel Sober

Title: Professor of Physics
Address: Physics Department, The Catholic University of America, Washington, DC 20064
Phone: 202-319-5856 / Fax: 202-319-4448 / e-mail: sober@cua.edu
Home phone (emergencies only): 301-593-1540

My home page at CUA (Contains information on driving to CUA and area hotels)

CUA Office at JLab (seldom in office): Trailer City (Bldg. 16) Room 92
Phone: 757-269-7578 / JLab e-mail: sober@jlab.org (automatically forwarded to sober@cua.edu )

SURA Residence phone numbers (Oct. 2006)

New Hall B tagger page (under development)

Hall D tagger figures and calculations

Useful files for Primex run

PAC-26 (July 2004)-- Proposal 04-102 (update of Proposal 01-104): Helicity structure of pion photoproduction

• Web page for Proposal 04-102 (update of Proposal 01-104)

Hall B Tagged Photon Beam Information

• New tagger information 2004 (new power supply, ...)

• Tagger energy calibration status

• Tagger counter calibration with radioactive sources

• PAC20 (July 2001) Proposal 01-104: Helicity structure of pion photoproduction
• Real-photon GDH run preparation, Jan. 2001

• Tagger NIM article
  Published: Nucl. Instrum. Methods A, Volume 440, Issue 2, page 263 (1 February 2000.)
• Hardware manuals
  Tagger magnet, currents, dump, shutter, high voltages
• Results of ray-tracing Monte Carlo calculations
  E- and T-counter sizes and energies, correlations, rates, bins
• Bremsstrahlung calculations
  Photon angles, collimator rates and ratios, circ. polarization transfer, tagging efficiency
• Miscellaneous notes and calculations
  Photon flux norm., photon absorption,...
• Setting T-counter High Voltage with scalers (May 2000)
  Procedure using psd, developed during RadPhi run

GSIM and CELEG work

Other useful sites:

• My home page at CUA
• CUA Physics Department
• Hall B at JLab
• CLAS Calibration and Commissioning (CalCom) committee