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User name Yi Zhang
Log entry time 10:53:45 on November 17, 2008
Entry number 249353
keyword=BB Cherenkov test ADC plotsFig1: Run#3587, I=1uA, 1M events Polarized 3He Start_Run_3587 HV: 1 : 1950 1568. current: 1 : 700 550. HV: 2 : 1971 2100. current: 2 : 707 737. HV: 3 : 1351 1519. current: 3 : 485 533. HV: 4 : 1801 1579. current: 4 : 646 556. HV: 5 : 1625 1470. current: 5 : 583 514. HV: 6 : 1700 2069. current: 6 : 611 725. HV: 7 : 1880 1800. current: 7 : 674 630. HV: 8 : 1600 1491. current: 8 : 575 522. HV: 9 : 1201 1898. current: 9 : 431 664. HV: 10 : 1801 1798. current: 10 : 643 629.
Fig2: Run#3588, I=6uA, 1M events Polarized 3He Start_Run_3588 HV: 1 : 1950 1568. current: 1 : 705 552. HV: 2 : 1971 2100. current: 2 : 714 736. HV: 3 : 1352 1519. current: 3 : 490 533. HV: 4 : 1800 1579. current: 4 : 653 557. HV: 5 : 1625 1470. current: 5 : 587 514. HV: 6 : 1700 2069. current: 6 : 620 728. HV: 7 : 1880 1800. current: 7 : 680 629. HV: 8 : 1600 1491. current: 8 : 581 522. HV: 9 : 1201 1898. current: 9 : 434 670. HV: 10 : 1801 1798. current: 10 : 646 631.
In these plots, black line is the data without any cuts red line is under the cuts: DL.evtypebits&1<<1&&abs(BB.tr.vz)<0.2&&BB.ts.ps.e>600&&BB.tr.p<1.4 suppose to be good electron. green line is under the cuts: DL.evtypebits&1<<1&&abs(BB.tr.vz)<0.2&&BB.ts.ps.e<400&&BB.tr.p<1.4 suppose to be mesons.
Figure 1
Figure 2
