15 Broken BPRS channels ver=1.6, based on data from March of 2008
The following BPRS pmts/tiles have been found broken or partially not functioning, based on reco MIP response from pp 2008 data.
Based on PMT-sorted spectra available HERE (300 pages , 3.6MB)
Table 1. Simply dead PMT's. Raw spectra contain 16 nice pedestals, no energy above, see Fig 2.
PMB,pmt, PDF page # , 16 mapped softIDs 2,3 8, 2185 2186 2187 2188 2205 2206 2207 2208 2225 2226 2227 2228 2245 2246 2247 2248 2,4, 9, 2189 2190 2191 2192 2209 2210 2211 2212 2229 2230 2231 2232 2249 2250 2251 2252 4,5, 20, 2033 2034 2035 2036 2053 2054 2055 2056 2073 2074 2075 2076 2093 2094 2095 2096 5,1, 21, 1957 1958 1959 1960 1977 1978 1979 1980 1997 1998 1999 2000 2017 2018 2019 2020 12,2, 57, 1421 1422 1423 1424 1425 1426 1427 1428 1441 1442 1443 1444 1445 1446 1447 1448 14,1, 66, 1221 1222 1223 1224 1225 1226 1227 1228 1241 1242 1243 1244 1245 1246 1247 1248 24,4, 119, 433 434 435 436 453 454 455 456 473 474 475 476 493 494 495 496 25,4, 124, 353 354 355 356 373 374 375 376 393 394 395 396 413 414 415 416 26,4, 129, 269 270 271 272 289 290 291 292 309 310 311 312 329 330 331 332 32,3, 158, 2409 2410 2411 2412 4749 4750 4751 4752 4769 4770 4771 4772 4789 4790 4791 4792 44,5, 220, 3317 3318 3319 3320 3337 3338 3339 3340 3357 3358 3359 3360 3377 3378 3379 3380 39,2, 192, 2905 2906 2907 2908 2925 2926 2927 2928 2945 2946 2947 2948 2965 2966 2967 2968
Table 2. FEE is broken (or 8-connector has a black tape), disabling 1/2 of PMT, see Fig 3.
PMB,pmt, nUsedPix, avrMIP (adc), rmsMIP (adc),PDF page # , all mapped softIDs 7,1, 7, 19.14, 4.36, 31, 1797 1798 1799 1800 1817 1818 1819 1820 1837 1838 1839 1840 1857 1858 1859 1860 40,1, 8, 5.16, 0.53, 196, 2981 2982 2983 2984 3001 3002 3003 3004 3021 3022 3023 3024 3041 3042 3043 3044 40,2, 6, 5.44, 0.80, 197, 2985 2986 2987 2988 3005 3006 3007 3008 3025 3026 3027 3028 3045 3046 3047 3048 40,3, 12, 8.50, 1.05, 198, 2989 2990 2991 2992 3009 3010 3011 3012 3029 3030 3031 3032 3049 3050 3051 3052 44,1, 10, 13.72, 8.24, 216, 3301 3302 3303 3304 3305 3306 3307 3308 3321 3322 3323 3324 3325 3326 3327 3328 45,2, 8, 5.04, 1.55, 222, 3421 3422 3423 3424 3425 3426 3427 3428 3441 3442 3443 3444 3445 3446 3447 3448 51,5, 7, 11.37, 2.15, 255, 3877 3878 3879 3880 3897 3898 3899 3900 3917 3918 3919 3920 3937 3938 3939 3940 52,5, 8, 15.84, 4.80, 260, 3957 3958 3959 3960 3977 3978 3979 3980 3997 3998 3999 4000 4017 4018 4019 4020 60,1, 8, 15.12, 3.41, 296, 4581 4582 4583 4584 4601 4602 4603 4604 4621 4622 4623 4624 4641 4642 4643 4644
Table 3. Very low yield of MIPs (1/5 of typical), may de due to badly sitting optical connector, see Fig 4
PMB,pmt, QAflag, nUsedPix, avrMIP (adc), rmsMIP (adc),PDF page # , all mapped softIDs
10,5, 14, 0, 0.00, 0.00, 50, 1553 1554 1555 1556 1573 1574 1575 1576 1593 1594 1595 1596 1613 1614 1615 1616
31,5, 14, 0, 0.00, 0.00, 155, 4677 4678 4679 4680 4697 4698 4699 4700 4717 4718 4719 4720 4737 4738 4739 4740
37,2, 0, 10, 12.90, 7.41, 182, 2745 2746 2747 2748 2765 2766 2767 2768 2785 2786 2787 2788 2805 2806 2807 2808
49,1, 0, 16, 9.36, 3.55, 241, 3701 3702 3703 3704 3705 3706 3707 3708 3721 3722 3723 3724 3725 3726 3727 3728
Table 4. Stuck LSB in FEE, we can live with this. (do NOT mask those tiles)
PMB,pmt, QAflag, nUsedPix, avrMIP (adc), rmsMIP (adc),PDF page # , all mapped softIDs 51,1,0, 15, 8.37, 1.30, 251, 3861 3862 3863 3864 3881 3882 3883 3884 3901 3902 3903 3904 3921 3922 3923 3924 51,2,0, 16, 8.66, 1.06, 252, 3865 3866 3867 3868 3885 3886 3887 3888 3905 3906 3907 3908 3925 3926 3927 3928 51,3,0, 16, 11.08, 1.28, 253, 3869 3870 3871 3872 3889 3890 3891 3892 3909 3910 3911 3912 3929 3930 3931 3932 51,4,0, 16, 17.16, 2.70, 254, 3873 3874 3875 3876 3893 3894 3895 3896 3913 3914 3915 3916 3933 3934 3935 3936
Table 5. Other problems:
PMB,pmt, QAflag, nUsedPix, avrMIP (adc), rmsMIP (adc),PDF page # , all mapped softIDs 31,2,0, 16, 12.32, 3.73, 152,4665 4666 4667 4668 4685 4686 4687 4688 4705 4706 4707 4708 4725 4726 4727 4728
Fig 1. Example of fully functioning PMT (BPM=4, pmt=5). 16 softID are listed at the bottom o fthe X-axis.
Top plot: ADC spectra after MIP condition is imposed based on TPC track & BTOW response.
Bottom plot: raw ADC spectra for the same channels.
Fig 2. Example of dead PMT with functioning FEE.
Fig 3. Example of half-dead PMT, comes in pack, most likely broken FEE.
Fig 4. Example of weak raw ADC, perhaps optical connector got loose.
Fig 5. Example of stuck LSB, We can live with this, but gain hardware must be ~10% higher (ADC--> 18)
