Geiger counter Circuit, does this look like it'll work?

i want measure beta , gamma radiation levels remotely, want make simple geiger counter outputs signal arduino can read , log in sd card. first step voltage 400v using re-purposed disposable camera circuit, apply positive voltage anode of tube. when particle ionizes gas inside tube, small, short tick of current flows. 2 micro amps 2 nano seconds, hear. wont have ability measure that. little bit of current switches transistor, uses trigger function of 555 make pulse bit longer , @ lower voltage arduino can see on input, , count , store data. sound work? can tell me things got wrong in schematic?

here's schematic:

d1 backwards , r6 small geiger tubes. don't need 555 produce signal arduino can read.  tubes require between 500 , 900 v operate. there other problems.

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