First look at clusters in cosmic ray setup
Ten events collected in run 41 (gas mixture 90-10) HV 3200 for 1B and 1C and 3300V for 1D
event 0
- . . . . . . . : charge: -7 +- 81.0195 location: 1BP552/2712 ped: 510 +- 30.6225 run evtNr 0
- 19 . . . . . . : charge: 4 +- 32.8139 location: 1BP553/2713 ped: 606 +- 12.4025 run evtNr 0
- . . . . . . . : charge: -106 +- 80.3062 location: 1BP554/2714 ped: 474 +- 30.3529 run evtNr 0
- 43 . . . . . . : charge: -228 +- 94.6375 location: 1BP555/2715 ped: 726 +- 35.7696 run evtNr 0
# 42 262 393 439 347 220 108 : charge: 1811 +- 83.215 location: 1BP556/2716 ped: 498 +- 31.4523 run evtNr 0 ---> seed w/ 1 high strip
* 253 1097 1733 1665 1537 1193 864 : charge: 8342 +- 106.582 location: 1BP557/2717 ped: 642 +- 40.2841 run evtNr 0 ---> Part of cluster
* 111 361 531 637 614 466 327 : charge: 3047 +- 83.7245 location: 1BP558/2718 ped: 522 +- 31.6449 run evtNr 0 ---> End of a cluster
- 90 . . . . . . : charge: -33 +- 101.229 location: 1BP559/2719 ped: 642 +- 38.2611 run evtNr 0
- . . . . . . . : charge: -85 +- 84.6804 location: 1BP560/2720 ped: 546 +- 32.0062 run evtNr 0
- . . . . . . . : charge: -197 +- 87.0976 location: 1CP542/4142 ped: 726 +- 32.9198 run evtNr 0
- . . . . . . . : charge: -71 +- 85.748 location: 1CP543/4143 ped: 714 +- 32.4097 run evtNr 0
- . . 40 . . . . : charge: -225 +- 96.9472 location: 1CP544/4144 ped: 726 +- 36.6426 run evtNr 0
* 96 98 184 169 . . . : charge: 391 +- 86.9635 location: 1CP545/4145 ped: 642 +- 32.8691 run evtNr 0 ---> Beginning of a cluster
* . 67 301 305 122 . . : charge: 651 +- 85.4038 location: 1CP546/4146 ped: 726 +- 32.2796 run evtNr 0 ---> Part of cluster
# 159 454 1106 1856 1856 1662 1255 : charge: 8348 +- 94.2739 location: 1CP547/4147 ped: 738 +- 35.6322 run evtNr 0 ---> seed w/ 1 high strip
* 208 412 1341 2424 2846 2746 2271 : charge: 12248 +- 107.507 location: 1CP548/4148 ped: 714 +- 40.6339 run evtNr 0 ---> Part of cluster
* 97 313 648 867 667 468 289 : charge: 3349 +- 98.9828 location: 1CP549/4149 ped: 750 +- 37.412 run evtNr 0 ---> End of a cluster
- 67 . 130 126 . . . : charge: 32 +- 101.828 location: 1CP550/4150 ped: 714 +- 38.4872 run evtNr 0
- 45 86 177 109 . . . : charge: 251 +- 97.7399 location: 1CP551/4151 ped: 786 +- 36.9422 run evtNr 0
- 127 69 . . . . . : charge: 86 +- 69.6494 location: 1DP531/5571 ped: 702 +- 26.325 run evtNr 0
- . . . . . . . : charge: -47 +- 73.7387 location: 1DP532/5572 ped: 642 +- 27.8706 run evtNr 0
- 115 69 . . . . . : charge: -30 +- 71.6033 location: 1DP533/5573 ped: 690 +- 27.0635 run evtNr 0
* 101 94 . . . . . : charge: 132 +- 83.1202 location: 1DP534/5574 ped: 618 +- 31.4165 run evtNr 0 ---> Beginning of a cluster
* 235 300 87 . . . . : charge: 285 +- 73.3953 location: 1DP535/5575 ped: 726 +- 27.7408 run evtNr 0 ---> Part of cluster
# 326 788 1026 929 687 459 310 : charge: 4525 +- 79.4662 location: 1DP536/5576 ped: 654 +- 30.0354 run evtNr 0 ---> seed w/ 1 high strip
* 672 1695 2574 2411 1888 1358 1000 : charge: 11598 +- 71.6636 location: 1DP537/5577 ped: 666 +- 27.0863 run evtNr 0 ---> Part of cluster
* 266 577 535 452 280 164 104 : charge: 2378 +- 77.8684 location: 1DP538/5578 ped: 642 +- 29.4315 run evtNr 0 ---> Part of cluster
* 227 267 83 . . . . : charge: 184 +- 72.7539 location: 1DP539/5579 ped: 750 +- 27.4984 run evtNr 0 ---> Part of cluster
* 67 102 . 48 . . . : charge: 262 +- 78.0973 location: 1DP540/5580 ped: 582 +- 29.518 run evtNr 0 ---> Part of cluster
- 88 . . . . . . : charge: 47 +- 75.423 location: 1DP541/5581 ped: 630 +- 28.5072 run evtNr 0
* 44 35 . . . . . : charge: 79 +- 75.8905 location: 1DP542/5582 ped: 666 +- 28.6839 run evtNr 0 ---> End of a cluster
- 104 . . . . . . : charge: -126 +- 70.314 location: 1DP543/5583 ped: 738 +- 26.5762 run evtNr 0
- 68 . . . . . . : charge: 79 +- 81.5421 location: 1DP544/5584 ped: 618 +- 30.82 run evtNr 0
event 1
1B has no signal 1C and 1D do have one cluster each
event 2
all quads have more than 1 cluster
event 3
all quads have one cluster
event 4
1B has one cluster others empty
event 5
no clusters
event 6
1B and 1C have one cluster each 1D none
event 7
1B and 1C have one cluster 1D none
event 8
1B and 1C have no clusters 1D has one cluster
event 9
1B and 1C have one cluster each 1D none
The figure below shows cluster size versus phi of the cluster. It shows that the geometry I pick up from the DB is not right:
And the distribution of clusters along R is showing two "blobs":
The correlation between cluster charge and the value of ADCMax appears good, though trivial (maybe I'll learn more about it):
The correlation between R and phi for a particular (cluster) appears poor:
The multiplicity of hits in all three quadrants appears close to 3 (which I read as good news):
18-AUG-2012 This plot also gets updated with the new geometry:
The quadrant placed at the bottom of the stand has the following number of clusters:
The top quadrant shows the following multiplicity:
And finally the multiplicity in the middle quadrant:
Just reading these histograms one would conclude that with the cluster definition as set at this moment the quadrant efficiency is: TOP 70% MIDDLE 70% and BOTTOM 60%
The hit location for each quadrant (the geometry is still putting all 3 cosmic ray quadrants in disc 0) :
18-AUG-2012 Reading the code I realized that the way to set the cosmic ray geometry is not thru the database but with StFgtCosmicTestStandGeom
I modified that file to the actual setting: arm=0 reads top and middle quads and arm=1 reads the bottom one:
with that change I get a better picture for space hits:
- ramdebbe's blog
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