PMT

1
Veto
Liquid Scintillator
Gadolinium Loaded
PMT
PMT
Lead
Veto
Veto
200 cm
One of four in depth
2
Veto
Liquid Scintillator
Gadolinium Loaded
PMT
PMT
Lead
Veto
Veto
3
time
40 µs
Neutron Event
Shower Initiation, backsplash, proton recoil
Muon Event
PMT Signal
Neutron captures
dE/dx
4
Neutron Multiplicity Counter
35 cm
440 kg Gd/Liquid Scintillator in box
50 cm
PMT/Base
200 cm
5
Scintillator Box
50 cm
50 cm
Top/Bottom/Sides ¼ thick Acrylic or PVC if
opaque line with Chemflour white plastic (see
MACRO paper)
200 cm
Bottom need strongback (?), levelling feet want
top scint surface to not touch the box top
Endsclear Acrylic, mirrors inside or out (?)
6
Data Acquisition
Waveform Digitizer VME
DAQ Computer
Neutron Detectors
Amp
PMT
Trigger
OR
Veto Detectors
History Buffer
7
Organization

• Simulation / Physics Design (CWRU)
• Neutron Detectors
• Design (UCSB)
• Prototype (UCSB)
• Fabrication (UCSB)
• Testing (UCSB)
• Soudan Commissioning (CWRU/UCSB)
• Veto Detectors (UCSB(?) FNAL?)
• Calibration System
• Electronics
• DAQ
• Data Analysis