Pi-Beta Sub-Projects

Design

• Beamlines
• Proposed Calormeter Nomenclature
• A Partial PIBETA Detector
• Area layout for the 1997 "Panofsky" measurement

Simulation

• PIBETA Calorimeter Lineshapes Predicted Using Tomography Results
• Photonuclear Reactions in GEANT Code

Subdetectors

• Plastic Veto
• Cosmic Veto Counter
• Cosmic Veto Scintillators
• Active Degrader and New Beamtube
• 9 Element Active Target
• Wire Chamber's displacement
• DSC Channel mapping correction

CsI crystals

• Quality control of the CsI Crystals
• Wrapping of the CsI Crystals
• Three Dimensional Tomography of Pure CsI Calorimeter Crystals
• Uniformity measurements with a 137Cs source
• RASTA (Radioactive Source Tomography Apparatus)
• RASTA measurements before/after laquer painting
• RASTA trigger electronics

Electronics

• The Domino Sampling Chip (DSC) Project
• PMT Evaluation
• UVA 131 PMT Base
• Delay Cable Attenuation
• Helmholtz Coils
• UVA 139 Signal Splitter
• A preamplifier for target signals
• Crosstalk Measurement on ADC channels

Data Acquisition

• The MIDAS Data Acquisition System
• Dynamic gain calibration

GEANT Source Code Distribution

• pb_geant.tar.gz

Data Analysis

1993 Beam time

• Positron response

1994 Beam time

• Improved positron response
• Analysis of the pi- p -> p0 n data from the '94 beam time

1996 Beam time

• Fitting to Pedestal Peaks
• Angular Resolution of the CsI calorimeter
• Dave's Pibeta Beam96 Analysis
• Penny's Pibeta Beam96 Analysis

1997 Beam time

• pi+ -> e nu Preliminary Results

1998 Beam time

• Preliminary Results

1999 Beam time

• Preliminary Results
• Refined tdc offsets Determination
• Fitting of DSC waveforms
• Pion Position in Target

2000 Beam time

• Preliminary Results
• Hitting Point Reconstruction
• Chamber Resolution and Target Position
• Target Energy Calibration
• Adjusting TDC offsets for PIBETA trigger

2001 Beam time

• Preliminary Results
• Plastic Veto Offset
• New Target Tests
• Backtracking Tomograph

Data Summary Tapes

• pi+ -> e+ nu gamma DST, HL Trigger
• pi+ -> e+ nu gamma DST, Variable List

Pi0 -> 3 gamma Search

• The Dubna LH2 target (eps drawing)
• LH2 target photo (jpeg)
• Letter of Intent (pdf)

2005 Detector Refurbishment

• Compilation of the Test Results
• Pictures of the Refurbishment