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| nmm:lbcftimingtests [2013/07/01 13:58] – villaa | nmm:lbcftimingtests [2013/07/08 15:03] (current) – koch |
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| =====LBCF station correlated timing===== | =====veto shield station correlated timing===== |
| The LBCF has 4 independent DAQ stations NE,NW,SE,SW in each geographical corner of the Soudan 2 cavern at Soudan. Each station has two or three front-end electronics multiplexer (MUX) boards. The expected relative timing resolution of < 4us for our 1kHz GPS carrier, had been observed as of June 4th 2013 on only one station-mux-combination pair. The pair which showed the good timing was SE MUX 2, to SW MUX 2. The correlated timing was confirmed using a 40 Hz pulser which supplied simultaneous pulses to both of the station/mux combinations. The last week in June 2013 was deticated to examining this problem in detail with Kelly Stifter at Soudan, setting up various timing tests. | The veto shield has 4 independent DAQ stations NE,NW,SE,SW in each geographical corner of the Soudan 2 cavern at Soudan. Each station has two or three front-end electronics multiplexer (MUX) boards. The expected relative timing resolution of < 4us for our 1kHz GPS carrier, had been observed as of June 4th 2013 on only one station-mux-combination pair. The pair which showed the good timing was SE MUX 2, to SW MUX 2. The correlated timing was confirmed using a 40 Hz pulser which supplied simultaneous pulses to both of the station/mux combinations. The last week in June 2013 was deticated to examining this problem in detail with Kelly Stifter at Soudan, setting up various timing tests. |
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| Several kinds of tests were used to diagnose the problem, a summary table of the tests is given below. | Several kinds of tests were used to diagnose the problem, a summary table of the tests is given below. |
| |6/20/2013|1443 - 1444|manual strobe test|t-ed|NWdaq,SW1|P14T10 (SW)|bad| off ~29m| | |6/20/2013|1443 - 1444|manual strobe test|t-ed|NWdaq,SW1|P14T10 (SW)|bad| off ~29m| |
| |6/24/2013|1111 - 1118|40Hz pulser cycle|t-ed|SE1,SW2|P13T14 (SE); P2T15 (SW)|bad| off ~12m| | |6/24/2013|1111 - 1118|40Hz pulser cycle|t-ed|SE1,SW2|P13T14 (SE); P2T15 (SW)|bad| off ~12m| |
| |6/24/2013|1338 - 1346|40Hz pulser cycle|t-ed|SE1,NE2|P13T14 (SE); P14T29 (NE)|bad| off ~18s| | |6/24/2013|1120 - 1128|40Hz pulser cycle|t-ed|SE2,SW2|P0T16 (SE); P2T15 (SW)|good| < 1us diffs| |
| | |6/24/2013|1314 - 1321|40Hz pulser cycle|t-ed|NW2,NE2|P22T14 (NW); P29T14 (NE)|good| < 1us diffs| |
| | |6/24/2013|1338 - 1346|40Hz pulser cycle|t-ed|SE1,NE2|P13T14 (SE); P29T14 (NE)|bad| off ~18s| |
| | |6/25/2013|1700 - 1706|40Hz long/cycled pulser|t-ed|NW2,NE2|P22T14 (NW); P29T14 (NE)|correctable| NE2 trails 8s| |
| | |6/26/2013|1045 - 1052|40Hz long/cycled pulser|t-ed|SE1,SW2|P13T14 (SE); P2T15 (SW)|correctable| SE1 trails 17.6h| |
| | |6/26/2013|1522 - 0918 (6/27) |0.2Hz pulser strobe test|t-ed|NE|all|bad|not always reset| |
| | |6/27/2013|0929 - 1129|0.2Hz pulser strobe test|t-ed|NW1|all|good|no bad/missed strobes| |
| | |6/27/2013|0929 - 1129|0.2Hz pulser strobe test|t-ed|NW2|all|good|no bad/missed strobes| |
| | |6/27/2013|1141 - 1457|0.2Hz pulser strobe test|t-ed|SE1|all|strange|strobe to 5s not 0s, none missed| |
| | |6/27/2013|1141 - 1457|0.2Hz pulser strobe test|t-ed|SE2|all|strange|strobe to 5s not 0s, none missed| |
| | |6/27/2013|1141 - 1457|0.2Hz pulser strobe test|t-ed|SW1|all|good|no bad/missed strobes| |
| | |6/27/2013|1141 - 1457|0.2Hz pulser strobe test|t-ed|SW1|all|strange|eventually strobe to 5s not 0s, none missed| |
| | |6/27/2013|1505 - 1622|40Hz long/cycled pulser|t-ed|SE1,SW1|P13T14 (SE); P14T14 (SW)|correctable|SW1 trails 9s| |
| | |6/28/2013|0744 - 0856|40Hz long/cycled pulser|t-ed|NW3,NE3|PNMMbotT7 (NW); PNFACEbotT7 (NE)|bad|bad data| |
| | |6/28/2013|0901 - 1011|40Hz long/cycled pulser|t-ed|NW2,NE3|P22T14 (NW); PNFACEbotT7 (NE)|correctable|NW2 trails 13s| |
| | |6/28/2013|1017 - 1132|40Hz long/cycled pulser|t-ed|NE3,SE1|PNFACEbotT7 (NE); P13T14 (SE)|correctable|SE1 trails 168s| |
| | |7/8/2013|0823 - 0941|40Hz long/cycled pulser|t-ed|NE2,NE3|P29T14 (NE); PNFACEbotT7 (NE)|correctable|NE2 trails 64.93 hours| |
| | |7/8/2013|0949 - 1100|40Hz long/cycled pulser|t-ed|NW1,NW2|P22T12 (NW); P30T14 (NW)|good| < 1us diffs| |
| | |7/8/2013|1115 - 1225|40Hz long/cycled pulser|t-ed|NW1,SW1|P22T12 (NW); P14T14 (SW)|correctable|NW1 trails 8s| |
| | |7/8/2013|1239 - 1246|40Hz long/cycled pulser|t-ed|NW2,SW1|P30T14 (NW); P14T14 (SW)|correctable|NW2 trails 2s| |