Nanobeacon Calibration in DU2

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Presentation transcript:

Nanobeacon Calibration in DU2 Avaliable data from DataBase: Calibration Curves Test in Naples First analysis Next Operation 15/01/2016 G. Riccobene

Nanobeacon Calibration in DU2 Calibration Curves from DataBase All nanobeacon curves are in the database but it seems we have 2 populations DOM 1:6 DOM 7:18 (typ, DOM1) (typ, DOM 11) 15/01/2016 G. Riccobene

Nanobeacon Calibration in DU2 Test in Naples Voltage set = 7V DOM # - Rate/10 [kHz] nanobeacon off - Rate/10 [kHz] nanobeacon ON 1 200 65000 2 400 108000 3 2000 67000 4 500 101000 5 290 96000 6 350 6400 7 400 2000 8 400 8500 9 350 20000 10 400 1200 11 300 NO Nanobeacon 400 700(7V) 3800(8V) 400 9300 400 18000 400 80000 500 15500 400 3600 450 2800 See elog entry http://elog.km3net.de/DU+Integration/44 15/01/2016 G. Riccobene

Nanobeacon Calibration in DU2 Test in Naples (CLB swissknife screenshot) 15/01/2016 G. Riccobene

Runs Performed First Runs: aim optimising nanobeacon voltage (maximum power avoiding PMT saturation and High Rate Veto) http://elog.km3net.de/Operations+IT/1899 We use JavaGUI tool first to find the optima settings for The nanobeacon voltage. A run setup will be defined after these tests The procedure on how to operate is described on the Operation wiki page

Runs Performed

Runs Performed http://elog.km3net.de/Operations+IT/2049 The voltage settings were changed to reach a rate on channel 0 of ~13 kHz, in order not to blind the DOMs. 1649: DOM3, mV = 6600 1651: DOM4, mV = 6000 1653: DOM5, mV=5800 1655: DOM6, mV= 7000 DOM7 mV= 8500 1693 DOM 8 mV= 7100 1695 DOM 9 mV = 6800 1697 DOM9 mV= 6800 The other settings were: pulse period 6251 (10 kHz) pulse count 9500 pulse duration 1 (change of pulse duration has no effect) DOMs 1, 2, 10 and 11 skipped http://elog.km3net.de/Operations+IT/2049 http://elog.km3net.de/Operations+IT/2050 http://elog.km3net.de/Operations+IT/2051 http://elog.km3net.de/Operations+IT/2060

Runs Performed Cumulative DOM rate DOM 3 and 4 DOM 3 and 4

Runs Performed Cumulative DOM rate DOM 4 and 5

Strategy Use Channel0 [3,4]of the emittng DOM as reference and measure delay of LED emission (width 16 ns, expected delay wrt PPS ca. 1 ns) Measure arrival time distribution of photons to downward looking PMTs of upper DOM (modulo 10 kHz) Increase LED power and check that this delay is constant, then run at higher power