Difference between revisions of "Specification for broad-band tagging hodoscope"

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Line 67: Line 67:
 
==Fixed array counter positions==
 
==Fixed array counter positions==
  
List updated by D. Sober based on B. Crahen's drawings of counter positions on mounting plates (7/1/14) <br>
+
Table moved to [[Position and Energy Boundaries for all installed Counters]]
(counters 205-217 corrected for actual counter size as of 09-Mar-2016)
+
 
+
    counter #:          consecutive counter number (in parenthesis: positions not filled for coh. edge at 9.0 GeV)
+
    coordinates:        (x<sub>center</sub>,y<sub>center</sub>) position of counter center
+
                        for z=upwards, x=along focal plane, y=towards vacuum chamber
+
    origin of coord.:  intersection of a 0.3 GeV electron ray with the focal plane
+
    angle:              entry angle of electron rays with respect to the focal plane
+
    width:              width of scintillators (in parenthesis: changed width for coh. edge at 8.0 or 7.7 GeV)
+
 
+
{| border="1" style="text-align:center;" cellpadding="10" cellspacing="0"
+
|- style="font-style:bold; color:blue;"
+
|!scope="row" | counter # || E<sub>&gamma;</sub><sup>high</sup> || E<sub>&gamma;</sub><sup>low</sup> || x<sub>center</sub> || y<sub>center</sub> || angle || width
+
|-
+
| &nbsp; || (GeV) || (GeV) || (cm) || (cm) || (deg) || (cm)
+
|-
+
| 1 || 11.778 || 11.769 || -0.70 || -18.0 || 44.078 || 2.1
+
|-
+
| 2 || 11.769 || 11.759 || -7.96 || -8.0 || 43.087 || 2.1
+
|-
+
| 3 || 11.758 || 11.748 || 6.21 || -18.0 || 42.116 || 2.1
+
|-
+
| 4 || 11.748 || 11.737 || -1.67 || -8.0 || 41.162 || 2.1
+
|-
+
| 5 || 11.736 || 11.725 || 13.38 || -18.0 || 40.237 || 2.1
+
|-
+
| 6 || 11.725 || 11.713 || 4.86 || -8.0 || 39.333 || 2.1
+
|-
+
| 7 || 11.712 || 11.700 || 20.81 || -18.0 || 38.451 || 2.1
+
|-
+
| 8 || 11.700 || 11.686 || 11.63 || -8.0 || 37.593 || 2.1
+
|-
+
| 9 || 11.686 || 11.673 || 28.51 || -18.0 || 36.755 || 2.1
+
|-
+
| 10 || 11.672 || 11.658 || 18.67 || -8.0 || 35.942 || 2.1
+
|-
+
| 11 || 11.657 || 11.644 || 36.49 || -18.0 || 35.149 || 2.1
+
|-
+
| 12 || 11.643 || 11.627 || 25.98 || -8.0 || 34.376 || 2.1
+
|-
+
| 13 || 11.626 || 11.611 || 44.78 || -18.0 || 33.623 || 2.1
+
|-
+
| 14 || 11.611 || 11.594 || 33.58 || -8.0 || 32.888 || 2.1
+
|-
+
| 15 || 11.592 || 11.576 || 53.39 || -18.0 || 32.172 || 2.1
+
|-
+
| 16 || 11.576 || 11.557 || 41.48 || -8.0 || 31.474 || 2.1
+
|-
+
| 17 || 11.556 || 11.539 || 62.33 || -18.0 || 30.793 || 2.1
+
|-
+
| 18 || 11.538 || 11.518 || 49.70 || -8.0 || 30.131 || 2.1
+
|-
+
| 19 || 11.517 || 11.498 || 71.61 || -18.0 || 29.485 || 2.1
+
|-
+
| 20 || 11.497 || 11.475 || 58.24 || -8.0 || 28.855 || 2.1
+
|-
+
| 21 || 11.474 || 11.454 || 81.25 || -18.0 || 28.242 || 2.1
+
|-
+
| 22 || 11.453 || 11.429 || 67.12 || -8.0 || 27.645 || 2.1
+
|-
+
| 23 || 11.428 || 11.412 || 90.66 || -18.0 || 27.130 || 1.6
+
|-
+
| 24 || 11.411 || 11.392 || 74.68 || -8.0 || 26.695 || 1.6
+
|-
+
| 25 || 11.391 || 11.373 || 98.53 || -18.0 || 26.269 || 1.6
+
|-
+
| 26 || 11.372 || 11.352      || 81.92 || -8.0 || 25.851 || 1.6
+
|-
+
| 27 || 11.351 || 11.332 || 106.64 || -18.0 || 25.442 || 1.6
+
|-
+
| 28 || 11.332 || 11.310 || 89.37 || -8.0 || 25.041 || 1.6
+
|-
+
| 29 || 11.309 || 11.289 || 114.97 || -18.0 || 24.648 || 1.6
+
|-
+
| 30 || 11.288 || 11.266 || 97.05 || -8.0 || 24.263 || 1.6
+
|-
+
| 31 || 11.264 || 11.243 || 123.55 || -18.0 || 23.885 || 1.6
+
|-
+
| 32 || 11.242 || 11.219 || 104.95 || -8.0 || 23.516 || 1.6
+
|-
+
| 33 || 11.217 || 11.195 || 132.38 || -18.0 || 23.153 || 1.6
+
|-
+
| 34 || 11.194 || 11.169 || 113.10 || -8.0 || 22.798 || 1.6
+
|-
+
| 35 || 11.167 || 11.144 || 141.46 || -18.0 || 22.450 || 1.6
+
|-
+
| 36 || 11.143 || 11.117 || 121.48 || -8.0 || 22.109 || 1.6
+
|-
+
| 37 || 11.115 || 11.090 || 150.80 || -18.0 || 21.775 || 1.6
+
|-
+
| 38 || 11.089 || 11.061 || 130.11 || -8.0 || 21.448 || 1.6
+
|-
+
| 39 || 11.059 || 11.033 || 160.40 || -18.0 || 21.128 || 1.6
+
|-
+
| 40 || 11.032 || 11.003 || 138.99 || -8.0 || 20.814 || 1.6
+
|-
+
| 41 || 11.002 || 10.984 || 169.32 || -18.0 || 20.563 || 1.0
+
|-
+
| 42 || 10.984 || 10.965 || 145.53 || -8.0 || 20.373 || 1.0
+
|-
+
| 43 || 10.963 || 10.946 || 175.61 || -18.0 || 20.186 || 1.0
+
|-
+
| 44 || 10.945 || 10.926 || 151.33 || -8.0 || 20.001 || 1.0
+
|-
+
| 45 || 10.924 || 10.906 || 182.01 || -18.0 || 19.818 || 1.0
+
|-
+
| 46 || 10.905 || 10.885 || 157.23 || -8.0 || 19.638 || 1.0
+
|-
+
| 47 || 10.883 || 10.864 || 188.52 || -18.0 || 19.460 || 1.0
+
|-
+
| 48 || 10.864 || 10.843 || 163.23 || -8.0 || 19.285 || 1.0
+
|-
+
| 49 || 10.842 || 10.822 || 195.13 || -18.0 || 19.111 || 1.0
+
|-
+
| 50 || 10.822 || 10.800 || 169.34 || -8.0 || 18.940 || 1.0
+
|-
+
| 51 || 10.798 || 10.778 || 201.86 || -18.0 || 18.771 || 1.0
+
|-
+
| 52 || 10.778 || 10.755 || 175.56 || -8.0 || 18.605 || 1.0
+
|-
+
| 53 || 10.757 || 10.733 || 208.70 || -18.0 || 18.441 || 1.0
+
|-
+
| 54 || 10.732 || 10.709 || 181.88 || -8.0 || 18.278 || 1.0
+
|-
+
| 55 || 10.708 || 10.686 || 215.65 || -18.0 || 18.118 || 1.0
+
|-
+
| 56 || 10.686 || 10.662 || 188.32 || -8.0 || 17.960 || 1.0
+
|-
+
| 57 || 10.660 || 10.638 || 222.71 || -18.0 || 17.803 || 1.0
+
|-
+
| 58 || 10.638 || 10.613 || 194.86 || -8.0 || 17.649 || 1.0
+
|-
+
| 59 || 10.611 || 10.588 || 229.89 || -18.0 || 17.497 || 1.0
+
|-
+
| 60 || 10.588 || 10.563 || 201.51 || -8.0 || 17.347 || 1.0
+
|-
+
| 61 || 10.561 || 10.537 || 237.19 || -18.0 || 17.199 || 1.0
+
|-
+
| 62 || 10.537 || 10.511 || 208.28 || -8.0 || 17.053 || 1.0
+
|-
+
| 63 || 10.509 || 10.485 || 244.60 || -18.0 || 16.908 || 1.0
+
|-
+
| 64 || 10.484 || 10.458 || 215.15 || -8.0 || 16.766 || 1.0
+
|-
+
| 65 || 10.456 || 10.436 || 251.75 || -18.0 || 16.639 || 0.8
+
|-
+
| 66 || 10.436 || 10.414      || 221.09 || -8.0 || 16.528 || 0.8
+
|-
+
| 67 || 10.412 || 10.393 || 257.85 || -18.0 || 16.418 || 0.8
+
|-
+
| 68 || 10.392 || 10.369 || 226.75 || -8.0 || 16.309 || 0.8
+
|-
+
| 69 || 10.367 || 10.346 ||264.023 || -18.0 || 16.201 || 0.8
+
|-
+
| 70 || 10.346 || 10.323 || 232.49 || -8.0 || 16.095 || 0.8
+
|-
+
| 71 || 10.321 || 10.300      || 270.28 || -18.0 || 15.989 || 0.8
+
|-
+
| 72 || 10.300 || 10.276 || 238.30 || -8.0 || 15.885 || 0.8
+
|-
+
| 73 || 10.274 || 10.252 || 276.61 || -18.0 || 15.781 || 0.8
+
|-
+
| 74 || 10.252 || 10.228 || 244.18 || -8.0 || 15.679 || 0.8
+
|-
+
| 75 || 10.226 || 10.204 || 283.02 || -18.0 || 15.578 || 0.8
+
|-
+
| 76 || 10.204 || 10.179 || 250.14 || -8.0 || 15.478 || 0.8
+
|-
+
| 77 || 10.177 || 10.154 || 289.50 || -18.0 || 15.379 || 0.8
+
|-
+
| 78 || 10.154 || 10.129 || 256.17 || -8.0 || 15.281 || 0.8
+
|-
+
| 79 || 10.127 || 10.104 || 296.06 || -18.0 || 15.184 || 0.8
+
|-
+
| 80 || 10.104 || 10.078 || 262.28 || -8.0 || 15.088 || 0.8
+
|-
+
| 81 || 10.077 || 10.052 || 284.03 || -13.0 || 14.993 || 0.8
+
|-
+
| 82 || 10.051 || 10.035 || 305.42 || -18.0 || 14.916 || 0.5
+
|-
+
| 83 || 10.035 || 10.019 || 269.83 || -8.0 || 14.858 || 0.5
+
|-
+
| 84 || 10.018 || 10.003 || 290.71 || -13.0 || 14.800 || 0.5
+
|-
+
| 85 || 10.001 || 9.986 || 311.75 || -18.0 || 14.742 || 0.5
+
|-
+
| 86 || 9.986 || 9.969 || 275.71 || -8.0 || 14.685 || 0.5
+
|-
+
| 87 || 9.968 || 9.952 || 296.85 || -13.0 || 14.628 || 0.5
+
|-
+
| 88 || 9.951 || 9.935 || 318.14 || -18.0 || 14.572 || 0.5
+
|-
+
| 89 || 9.935 || 9.918 || 281.66 || -8.0 || 14.516 || 0.5
+
|-
+
| 90 || 9.917 || 9.901 || 303.05 || -13.0 || 14.460 || 0.5
+
|-
+
| 91 || 9.899 || 9.883 || 324.60 || -18.0 || 14.405 || 0.5
+
|-
+
| 92 || 9.883 || 9.866 || 287.68 || -8.0 || 14.350 || 0.5
+
|-
+
| 93 || 9.865 || 9.848 || 309.33 || -13.0 || 14.295 || 0.5
+
|-
+
| 94 || 9.847 || 9.830 || 331.13 || -18.0 || 14.241 || 0.5
+
|-
+
| 95 || 9.830 || 9.813 || 293.77 || -8.0 || 14.187 || 0.5
+
|-
+
| 96 || 9.812 || 9.794 || 315.67 || -13.0 || 14.134 || 0.5
+
|-
+
| 97 || 9.793 || 9.776 || 337.74 || -18.0 || 14.081 || 0.5
+
|-
+
| 98 || 9.776 || 9.758 || 299.93 || -8.0 || 14.028 || 0.5
+
|-
+
| 99 || 9.757 || 9.740 || 322.08 || -13.0 || 13.975 || 0.5
+
|-
+
| 100 || 9.738 || 9.721 || 344.41 || -18.0 || 13.923 || 0.5
+
|-
+
| 101 || 9.721 || 9.703 || 306.15 || -8.0 || 13.871 || 0.5
+
|-
+
| 102 || 9.702 || 9.684 || 328.56 || -13.0 || 13.820 || 0.5
+
|-
+
| 103 || 9.683 || 9.665 || 352.70 || -18.38 || 13.769 || 0.5
+
|-
+
| 104 || 9.665 || 9.647 || 312.44 || -8.0 || 13.718 || 0.5
+
|-
+
| 105 || 9.646 || 9.627 || 336.99 || -13.46 || 13.668 || 0.5
+
|-
+
| 106 || 9.626 || 9.608 || 359.53 || -18.38 || 13.617 || 0.5
+
|-
+
| 107 || 9.608 || 9.589 || 318.80 || -8.0 || 13.568 || 0.5
+
|-
+
| 108 || 9.588 || 9.569 || 343.32 || -13.38 || 13.518 || 0.5
+
|-
+
| 109 || 9.568 || 9.550 || 365.68 || -18.2 || 13.469 || 0.5
+
|-
+
| 110 || 9.550 || 9.531 || 325.23 || -8.0 || 13.420 || 0.5
+
|-
+
| 111 || 9.530 || 9.511 || 350.34 || -13.46 || 13.372 || 0.5
+
|-
+
| 112 || 9.509 || 9.491 || 371.78 || -18.0 || 13.324 || 0.5
+
|-
+
| 113 || 9.491 || 9.471 || 331.73 || -8.0 || 13.276 || 0.5
+
|-
+
| 114 || 9.470 || 9.451 || 358.42  || -13.76 || 13.228 || 0.5
+
|-
+
| 115 || 9.449 || 9.430 || 378.80 || -18.0 || 13.181 || 0.5
+
|-
+
| 116 || 9.430 || 9.410 || 338.29 || -8.0 || 13.134 || 0.5
+
|-
+
| 117 || 9.409 || 9.390 || 363.97 || -13.46 || 13.088 || 0.5
+
|-
+
| 118 || 9.388 || 9.369 || 385.88 || -18.0 || 13.041 || 0.5
+
|-
+
| 119 || 9.369 || 9.348 || 344.93 || -8.0 || 12.996 || 0.5
+
|-
+
| 120 || 9.347 || 9.327 || 368.90 || -13.0 || 12.950 || 0.5
+
|-
+
| 121 || 9.326 || 9.306 || 393.04 || -18.0 || 12.904 || 0.5
+
|-
+
| 122 || 9.306 || 9.286 || 351.64 || -8.0 || 12.859 || 0.5
+
|-
+
| 123 || 9.285 || 9.264 || 375.87 || -13.0 || 12.815 || 0.5
+
|-
+
| 124 || 9.284 || 9.243 || 400.27 || -18.0 || 12.770 || 0.5
+
|-
+
| 125 || 9.243 || 9.222 || 358.41 || -8.0 || 12.726 || 0.5
+
|-
+
| 126 || 9.221 || 9.200 || 382.90 || -13.0 || 12.682 || 0.5
+
|-
+
| 127 || 9.198 || 9.178 || 407.56 || -18.0 || 12.639 || 0.5
+
|- style="color:grey;"
+
!scope="row" | (128) || 9.178 || 9.157 || 365.26 || -8.0 || 12.595 || (0.5)
+
|- style="color:grey;"
+
!scope="row" | (129) || 9.156 || 9.134 || 390.01 || -13.0 || 12.552 || (0.5)
+
|- style="color:grey;"
+
!scope="row" | (130) || 9.133 || 9.112 || 414.93 || -18.0 || 12.509 || (0.5)
+
|- style="color:grey;"
+
!scope="row" | (131) || 9.112 || 9.090 || 372.17 || -8.0 || 12.467 || (0.5)
+
|- style="color:grey;"
+
!scope="row" | (132) || 9.089 || 9.068 || 397.18 || -13.0 || 12.425 || (0.5)
+
|- style="color:grey;"
+
!scope="row" | (133) || 9.066 || 9.045 || 422.37 || -18.0 || 12.383 || (0.5)
+
|- style="color:grey;"
+
!scope="row" | (134) || 9.045 || 9.023 || 379.15 || -8.0 || 12.341 || (0.5)
+
|- style="color:grey;"
+
!scope="row" | (135) || 9.022 || 9.000 || 404.43 || -13.0 || 12.300 || (0.5)
+
|- style="color:grey;"
+
!scope="row" | (136) || 8.998 || 8.977 || 429.87 || -18.0 || 12.259 || (0.5)
+
|- style="color:grey;"
+
!scope="row" | (137) || 8.977 || 8.954 || 386.21 || -8.0 || 12.218 || (0.5)
+
|- style="color:grey;"
+
!scope="row" | (138) || 8.953 || 8.931 || 411.74 || -13.0 || 12.178 || (0.5)
+
|- style="color:grey;"
+
!scope="row" | (139) || 8.929 || 8.908 || 437.45 || -18.0 || 12.137 || (0.5)
+
|- style="color:grey;"
+
!scope="row" | (140) || 8.908 || 8.890 || 393.09 || -8.0 || 12.101 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (141) || 8.889 || 8.871 || 418.39 || -13.0 || 12.069 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (142) || 8.869 || 8.852 || 443.81 || -18.0 || 12.038 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (143) || 8.852 || 8.833 || 398.84 || -8.0 || 12.006 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (144) || 8.832 || 8.814 || 424.34 || -13.0 || 11.975 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (145) || 8.812 || 8.795 || 449.97 || -18.0 || 11.944 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (146) || 8.795 || 8.776 || 404.63 || -8.0 || 11.913 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (147) || 8.775 || 8.756 || 430.33 || -13.0 || 11.882 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (148) || 8.755 || 8.738 || 457.98 || -18.38 || 11.851 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (149) || 8.737 || 8.718 || 410.46 || -8.0 || 11.821 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (150) || 8.717 || 8.698 || 440.02 || -13.76 || 11.790 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (151) || 8.697 || 8.679 || 464.24 || -18.38 || 11.760 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (152) || 8.679 || 8.659 || 416.35 || -8.0 || 11.730 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (153) || 8.658 || 8.639 || 444.79 || -13.48 || 11.700 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (154) || 8.638 || 8.619 || 469.69 || -18.2 || 11.671 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (155) || 8.619 || 8.600 || 422.27 || -8.0 || 11.641 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (156) || 8.600 || 8.579 || 449.58 || -13.2 || 11.612 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (157) || 8.578 || 8.559 || 475.04 || -18.0 || 11.582 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (158) || 8.569 || 8.539 || 428.24 || -8.0 || 11.553 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (159) || 8.539 || 8.519 || 456.26 || -13.3 || 11.524 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (160) || 8.517 || 8.498 || 481.42 || -18.0 || 11.496 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (161) || 8.498 || 8.478 || 434.25 || -8.0 || 11.467 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (162) || 8.477 || 8.458 || 464.75 || -13.76 || 11.438 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (163) || 8.456 || 8.437 || 487.84 || -18.0 || 11.410 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (164) || 8.437 || 8.417 || 439.56 || -7.85 || 11.382 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (165) || 8.416 || 8.395 || 469.52 || -13.46 || 11.354 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (166) || 8.394 || 8.375 || 494.30 || -18.0 || 11.326 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (167) || 8.375 || 8.354 || 444.89 || -7.7 || 11.298 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (168) || 8.353 || 8.333 || 474.57 || -13.2 || 11.271 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (169) || 8.331 || 8.311 || 500.81 || -18.0 || 11.243 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (170) || 8.311 || 8.291 || 450.26 || -7.54 || 11.216 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (171) || 8.290 || 8.269 || 479.90 || -13.0 || 11.189 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (172) || 8.267 || 8.248 || 507.37 || -18.0 || 11.162 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (173) || 8.248 || 8.226 || 458.76 || -8.0 || 11.135 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (174) || 8.225 || 8.205 || 486.30 || -13.0 || 11.108 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (175) || 8.203 || 8.183 || 513.97 || -18.0 || 11.082 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (176) || 8.186 || 8.164 || 464.73 || -8.0 || 11.058 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (177) || 8.169 || 8.148 || 491.93 || -13.0 || 11.039 || (0.4)
+
|- style="color:grey;"
+
!scope="row" | (178) || 8.151 || 8.131 || 519.22 || -18.0 || 11.019 || (0.4)
+
|-
+
| 179 || 8.137 || 8.115 || 469.44 || -8.0 || 10.999 || 0.4
+
|-
+
| 180 || 8.120 || 8.098 || 496.78 || -13.0 || 10.980 || 0.4
+
|-
+
| 181 || 8.102 || 8.081 || 524.22 || -18.0 || 10.960 || 0.4
+
|-
+
| 182 || 8.088 || 8.066 || 474.16 || -8.0 || 10.941 || 0.4
+
|-
+
| 183 || 8.070 || 8.049 || 501.66 || -13.0 || 10.922 || 0.4
+
|-
+
| 184 || 8.053 || 8.031 || 529.25 || -18.0 || 10.903 || 0.4
+
|-
+
| 185 || 8.038 || 8.016 || 478.92 || -8.0 || 10.883 || 0.4
+
|-
+
| 186 || 8.031 || 7.998 || 506.561 || -13.0 || 10.864 || 0.4
+
|-
+
| 187 || 8.003 || 7.980 || 534.30 || -18.0 || 10.845 || 0.4
+
|-
+
| 188 || 7.987 || 7.965 || 483.70 || -8.0 || 10.827 || 0.4
+
|-
+
| 189 || 7.970 || 7.948 || 511.49  || -13.0  || 10.808 || 0.4
+
|-
+
| 190 || 7.952 || 7.930 || 539.37 || -18.0 || 10.789 || 0.4
+
|-
+
| 191 || 7.937 || 7.914 ||488.50  || -8.0  || 10.770 || 0.4
+
|-
+
| 192 || 7.930 || 7.896 || 516.44 || -13.0 || 10.752 || 0.4
+
|-
+
| 193 || 7.901 || 7.879 || 544.47 || -18.0 || 10.733   || 0.4
+
|-
+
| 194 || 7.861 || 7.838 || 495.67 || -8.0 || 10.679 || 0.4
+
|-
+
| 195 || 7.799 || 7.777 || 554.65 || -18.0 || 10.616 || 0.4
+
|-
+
| 196 || 7.741 || 7.718 || 506.90 || -8.0 || 10.555 || 0.4 (0.3)
+
|-
+
| 197 || 7.681 || 7.658 || 512.49 || -8.0 || 10.495 || 0.4 (0.3)
+
|-
+
| 198 || 7.621 || 7.598 || 518.06 || -8.0 || 10.436 || 0.4 (0.3)
+
|-
+
| 199 || 7.562 || 7.538 || 523.60 || -8.0 || 10.378 || 0.4 (0.3)
+
|-
+
| 200 || 7.502 || 7.478 || 529.13 || -8.0 || 10.322 || 0.4 (0.3)
+
|-
+
| 201 || 7.442 || 7.417 || 534.63 || -8.0 || 10.267 || 0.4 (0.3)
+
|-
+
| 202 || 7.382 || 7.357 || 540.12 || -8.0 || 10.214 || 0.4 (0.3)
+
|-
+
| 203 || 7.322 || 7.297 || 545.59 || -8.0 || 10.161 || 0.4 (0.3)
+
|-
+
| 204 || 7.262 || 7.237 || 551.04 || -8.0 || 10.109 || 0.4 (0.3)
+
|-
+
| 205 || 7.203 || 7.173 || 612.84 || -18.0 || 10.059 || 0.5 (0.3)
+
|-
+
| 206 || 7.143 || 7.112 || 618.54 || -18.0 || 10.010 || 0.5 (0.3)
+
|-
+
| 207 || 7.083 || 7.052 || 624.22 || -18.0 || 9.961 || 0.5 (0.3)
+
|-
+
| 208 || 7.023 || 6.992 || 629.87 || -18.0 || 9.914 || 0.5 (0.3)
+
|-
+
| 209 || 6.966 || 6.933 || 578.02 || -8.0 || 9.867 || 0.5 (0.3)
+
|-
+
| 210 || 6.903 || 6.872 || 641.13 || -18.0 || 9.822 || 0.5 (0.3)
+
|-
+
| 211 || 6.843 || 6.816 || 588.70 || -8.0 || 9.777 || 0.4 (0.3)
+
|-
+
| 212 || 6.780 || 6.754 || 652.31 || -18.0 || 9.733 || 0.4 (0.3)
+
|-
+
| 213 || 6.726 || 6.693 || 599.31 || -8.0 || 9.690 || 0.5 (0.3)
+
|-
+
| 214 || 6.660 || 6.634 || 663.42 || -18.0 || 9.648 || 0.4 (0.3)
+
|-
+
| 215 || 6.606 || 6.572 || 609.87 || -8.0 || 9.607 || 0.5 (0.3)
+
|-
+
| 216 || 6.540 || 6.514 || 674.46 || -18.0 || 9.566 || 0.4 (0.3)
+
|-
+
| 217 || 6.483 || 6.456 || 620.37 || -8.0 || 9.526 || 0.4 (0.3)
+
|-
+
| 218 || 6.417 || 6.397 || 685.44 || -18.0 || 9.487 || 0.3
+
|-
+
| 219 || 6.357 || 6.337 || 690.90 || -18.0 || 9.449 || 0.3
+
|-
+
| 220 || 6.300 || 6.279 || 636.01 || -8.0 || 9.411 || 0.3
+
|-
+
| 221 || 6.240 || 6.219 || 641.20 || -8.0 || 9.374 || 0.3
+
|-
+
| 222 || 6.180 || 6.159 || 646.38 || -8.0 || 9.337 || 0.3
+
|-
+
| 223 || 6.120 || 6.099 || 651.54 || -8.0 || 9.301 || 0.3
+
|-
+
| 224 || 6.059 || 6.038 || 687.34 || -13.0 || 9.266 || 0.3
+
|-
+
| 225 || 6.001 || 5.979 || 661.83 || -8.0 || 9.231 || 0.3
+
|-
+
| 226 || 5.941 || 5.919 || 666.96 || -8.0 || 9.197 || 0.3
+
|-
+
| 227 || 5.881 || 5.859 || 672.08 || -8.0 || 9.163 || 0.3
+
|-
+
| 228 || 5.821 || 5.799 || 677.18 || -8.0 || 9.130 || 0.3
+
|-
+
| 229 || 5.758 || 5.737 || 744.72 || -18.0 || 9.098 || 0.3
+
|-
+
| 230 || 5.698 || 5.676 || 750.03 || -18.0 || 9.066 || 0.3
+
|-
+
| 231 || 5.638 || 5.616 || 755.33 || -18.0 || 9.034 || 0.3
+
|-
+
| 232 || 5.578 || 5.556 || 760.61 || -18.0 || 9.003 || 0.3
+
|-
+
| 233 || 5.521 || 5.498 || 702.55 || -8.0 || 8.973 || 0.3
+
|-
+
| 234 || 5.458 || 5.436 || 771.13 || -18.0 || 8.943 || 0.3
+
|-
+
| 235 || 5.401 || 5.378 || 712.62 || -8.0 || 8.913 || 0.3
+
|-
+
| 236 || 5.338 || 5.316 || 781.62 || -18.0 || 8.884 || 0.3
+
|-
+
| 237 || 5.281 || 5.268 || 722.66 || -8.0 || 8.855 || 0.3
+
|-
+
| 238 || 5.219 || 5.196 || 792.06 || -18.0 || 8.826 || 0.3
+
|-
+
| 239 || 5.162 || 5.138 || 732.66 || -8.0 || 8.798 || 0.3
+
|-
+
| 240 || 5.099 || 5.076 || 802.45 || -18.0 || 8.771 || 0.3
+
|-
+
| 241 || 5.042 || 5.018 || 742.62 || -8.0 || 8.743 || 0.3
+
|-
+
| 242 || 4.979 || 4.956 || 812.82 || -18.0 || 8.716 || 0.3
+
|-
+
| 243 || 4.919 || 4.896 || 817.98 || -18.0 || 8.690 || 0.3
+
|-
+
| 244 || 4.862 || 4.838 || 757.50 || -8.0 || 8.664 || 0.3
+
|-
+
| 245 || 4.802 || 4.778 || 762.95 || -8.07 || 8.638 || 0.3
+
|-
+
| 246 || 4.742 || 4.718 || 768.39 || -8.15 || 8.612 || 0.3
+
|-
+
| 247 || 4.682 || 4.658 || 773.82 || -8.23 || 8.587 || 0.3
+
|-
+
| 248 || 4.621 || 4.597 || 809.09 || -12.8 || 8.562 || 0.3
+
|-
+
| 249 || 4.561 || 4.537 || 815.46 || -13.0 || 8.537 || 0.3
+
|-
+
| 250 || 4.503 || 4.478 || 787.06 || -8.0 || 8.513 || 0.3
+
|-
+
| 251 || 4.442 || 4.418 || 792.48 || -8.08 || 8.488 || 0.3
+
|-
+
| 252 || 4.382 || 4.358 || 797.89 || -8.15 || 8.464 || 0.3
+
|-
+
| 253 || 4.323 || 4.298 || 803.30 || -8.23 || 8.441 || 0.3
+
|-
+
| 254 || 4.259 || 4.235 || 874.23 || -18.0 || 8.417 || 0.3
+
|-
+
| 255 || 4.199 || 4.175 || 879.30 || -18.0 || 8.394 || 0.3
+
|-
+
| 256 || 4.139 || 4.115 || 884.36 || -18.0 || 8.371 || 0.3
+
|-
+
| 257 || 4.079 || 4.055 || 889.43 || -18.0 || 8.348 || 0.3
+
|-
+
| 258 || 4.019 || 3.995 || 894.48 || -18.0 || 8.326 || 0.3
+
|-
+
| 259 || 3.959 || 3.935 || 899.54 || -18.0 || 8.303 || 0.3
+
|-
+
| 260 || 3.900 || 3.875 || 904.59 || -18.0 || 8.281 || 0.3
+
|-
+
| 261 || 3.840 || 3.815 || 909.64 || -18.0 || 8.259 || 0.3
+
|-
+
| 262 || 3.780 || 3.755 || 914.69 || -18.0 || 8.237 || 0.3
+
|-
+
| 263 || 3.723 || 3.697 || 850.47 || -8.0 || 8.216 || 0.3
+
|-
+
| 264 || 3.663 || 3.637 || 855.34 || -8.0 || 8.194 || 0.3
+
|-
+
| 265 || 3.603 || 3.577 || 860.21 || -8.0 || 8.173 || 0.3
+
|-
+
| 266 || 3.543 || 3.517 || 865.08 || -8.0 || 8.152 || 0.3
+
|-
+
| 267 || 3.483 || 3.457 || 869.95 || -8.0 || 8.131 || 0.3
+
|-
+
| 268 || 3.423 || 3.397 || 874.83 || -8.0 || 8.110 || 0.3
+
|-
+
| 269 || 3.363 || 3.337 || 879.71 || -8.0 || 8.089 || 0.3
+
|-
+
| 270 || 3.303 || 3.277 || 884.59 || -8.0 || 8.068 || 0.3
+
|-
+
| 271 || 3.243 || 3.217 || 889.49 || -8.0 || 8.047 || 0.3
+
|-
+
| 272 || 3.183 || 3.157 || 894.39 || -8.0 || 8.027 || 0.3
+
|-
+
| 273 || 3.123 || 3.097 || 899.29 || -8.0 || 8.006 || 0.3
+
|-
+
| 274 || 3.064 || 3.037 || 904.21 || -8.0 || 7.986 || 0.3
+
|}
+

Latest revision as of 20:00, 25 January 2017

TAGH-from-magnet-all.jpg

In its standard configuration the fixed-array hodoscope consists of 218 scintillators distributed over 9.1 m behind the focal-plane of the tagger spectrometer. Standard configuration refers to a coherent-peak setting at 9.0 GeV, i.e. the microscope covers the energy range 8.1<Eγ<9.1 GeV.

Tagging range (for a 12 GeV electron beam):

  • Photons between 3.0 GeV and 8.2 GeV: detector positions correspond to 60 MeV steps in Eγ with 30-50% sampling. The counter widths are chosen such that the typical rate per counter is limited to 3-4 MHz at 108 γ/sec on target;
  • Photons between 9.2 GeV and 11.78 GeV: scintillators cover the full energy range, counter widths were calculated such that the typical rate per counter is limited to 1-4 MHz at 108 γ/sec on target.

All counters will be mounted at angles such that they face normal to the path of the scattered electrons.

Scintillators

Material EJ-228
Thickness     6 mm
Height 40 mm (slotted into the light guides, slot depth: 3mm)


Counter # width
[mm]
distance from
focal plane
Eγ
[GeV]
ΔE
[MeV]
1 – 22 21.0 8 / 18 cm 11.43 – 11.78 10.2 – 23.7
23 – 40 16.0 8 / 18 cm 11.01 – 11.43 18.4 – 29.5
41 – 64 10.0 8 / 18 cm 10.46 – 11.01 18.7 – 26.8
65 – 81 8.0 8 / 18 cm 10.05 – 10.46 21.7 – 26.0
82 – 139 5.0 8 / 13 / 18 cm 9.20 – 10.05 16.4 – 22.2
140 – 195 4.0 8 / 13 / 18 cm 7.07 – 8.13 16.6 – 17.2
196 – 274 3.0 8 cm 3.05 – 7.03 13.7 – 20.3
      TAGH-counter-cut.jpg

Light guides

All light guides (UVT PMMA) have cylindrical shape of 120 mm length and 7/8" = 22.2mm diameter to cover the size of the photocathode. A collar at 60mm height with 2 bolts along the slot line ensure proper positioning of the counters: threaded holes for the bolts in the mounting plates are correspondingly oriented.

Photomultipliers

Hamamatsu R9800: 1" tube with 8 dynodes, rise time 1.0 ns, transit time 11 ns, 27% quantum eff., max. anode current 100 μA.
magnetic shields: μ-metal cylinders.
HV dividers and 2-stage preamps (amp. factor 8.5x) developed at Jefferson Lab, they allow for limiting the anode current to 15-20 μA at 4 MHz rate.
Operating voltage: U=900 V resulting in a gain of 5×105, anode current contributes to less than 5% of the active base current.

Readout electronics The new preamp boards have 2-channel output for fADC250 and F1TDC.


Fixed array counter positions

Table moved to Position and Energy Boundaries for all installed Counters