1. Plan for prototype production and test
MWPC
Plan for prototype production and test
채경육
성균관대학교 물리학과

2. Beam tracking detector
Stage 1
Usage
• Beam current monitoring
• TOF for beam tagging
• Beam track recording
(event-by-event) F1
In-flight separation or
Beam transport F0 F2 WF
Stage 2 F3
Requirements
• high counting rate (mid-105 pps)
• good position resolution (~1 mm)
• high efficiency (~100%)
Q-Q-WF-D
(VAMOS-like
spectrometer) F4 F4

3. Beam tracking detectors
MCP
Beam tracking detectors
Multi Channel Plate (MCP)
• low energy loss
• low efficiency
Parallel Plate Avalanche Counter (PPAC)
• 5 layers of foil
• 100% up to 105pps
Multi-Wire Proportional Chamber (MWPC)
• low gas pressure
• 2 layers of foil
Ionization Chamber (IC)
• suitable for high E beams
• few hundreds Torr gas
Diamond Detector
• very strong against
radiation damage
• small active area
PPAC
MWPC

4. MWPC anode - prototype Bias voltage: ~1000 V 2.2 MΩ 2 mm pitch wires
16 channels

5. Results • 241Am a-emitting source tests • overloaded at ~600 V
• various energy range

6. DeeMe MWPC design (KEK)
2000 pF
• Registor: ERJ-8ENF2004V (0.25 W, 2 MΩ Panasonic)
• Capacitor: 1210Y2K0 0202KX (2000 pF, Syfer Technology)