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These following images were taken by using 2-dimensional delay line detector (Roentdek DLD-40).

RoentDek DLD-40 (2-D detector image) No.1
tested by Am-241 alpha source with Ag foil (5x10^-6 m)
threshold : 50mV
applied voltages
*MCP front : -2100V
*MCP back : 0V
*Anode Holder : 100V
*Reference wire : 350V
*Collecting (Signal) wire : 400V
rate : about 200 cps

Notice : The image of hexagonal shape is a mesh mounted on front of the detector.


RoentDek DLD-40 (2-D detector image) No.2
tested with Am-241 alpha source.
threshhold : 70mV
applied voltages
*MCP front : -2100V
*MCP back : 0V
*Anode Holder : 100V
*Reference wire : 350V
*Collecting (Signal) wire : 400V

Notice : The image of hexagonal shape is a mesh mounted on front of the detector.


RoentDek DLD-40 (2-D detector image) No.2

threshold : 75mV
applied voltages
*MCP front : -2100V
*MCP back : 0V
*Anode Holder : 100V
*Reference wires : 350V
*Collecting (Signal) wires : 400V

Notice : The hexagonal shape is a mesh mounted on front of the detector.


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