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MPPC mass check with relays 21/11/2006 Hidetoshi Otono(ICEPP,Tokyo)

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Presentation on theme: "MPPC mass check with relays 21/11/2006 Hidetoshi Otono(ICEPP,Tokyo)"— Presentation transcript:

1 MPPC mass check with relays 21/11/2006 Hidetoshi Otono(ICEPP,Tokyo)

2 RelayElement This is a relay element.

3 Relay element Internal connection inputoutput A relay element is controlled by internal LED. An input signal is passed when internal LED turns on. LED

4 Setup LEDMPPC relayOFF LEDMPPC relayOn LEDMPPC relayOFF LEDMPPC relayOFF DC board LED driver AMPADC

5 Advantage of using relays We need only a couple of AMPs (because recommended AMP is still expensive) We need only a couple of ADCchannel (ADCmodule is expensive) It is easy to increase the number of MPPC

6 Test @ICEPP MPPC #18 signal MPPC #19 signal MPPC signal selected by relay

7 Pedestal data of MPPC#18 mean sigma Setup1 49.18 4.69 Setup2 47.28 5.31 Setup3 50.34 5.72 Setup4 41.14 7.60

8 Test@Tsukuba-u 5Ωrelay 1Ωrelay

9 Mean of the pedestal @ Tsukuba-u mean sigma Setup1 101.1 1.90 Setup2 101.7 2.05 Setup3 100.9 1.93 Setup4 101.1 1.84


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