Plan for prototype production and test MWPC Plan for prototype production and test 채경육 kchae@skku.edu 성균관대학교 물리학과
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
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
MWPC anode - prototype Bias voltage: ~1000 V 2.2 MΩ 2 mm pitch wires 16 channels
Results • 241Am a-emitting source tests • overloaded at ~600 V • various energy range
DeeMe MWPC design (KEK) 2000 pF • Registor: ERJ-8ENF2004V (0.25 W, 2 MΩ Panasonic) • Capacitor: 1210Y2K0 0202KX (2000 pF, Syfer Technology)