TRT test beam July 2000 short summary

High rate studies

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Gas gain for highrate prototype - 2.5x104, beam - pions 180 GeV

Threshold
Rate 200 eV 250 eV 300 eV 400 eV
0 MHz 1116 1117 1118 1119
9.2 MHz 1120
13.1 MHz 1122 1123
16.8 MHz 1125 1124

Gas gain for highrate prototype - 3.5x104, beam - pions 180 GeV

Threshold
Rate 143 eV 179 eV 214 eV 286 eV
0 MHz 1132 1134 1136 1137
9.2 MHz 1138 1139 1145
13.1 MHz 1141 1140 1142 1143
16.8 MHz 1126 1127

Studies with low energy beam

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Single straw detector and sector prototype1) in parallel

Gas gain for sector prototype - 2.5x104
Gas gain for highrate prototype - 3.7x104


Beam
Discriminator thresholds pions 20 GeVpions+electrons 20 GeV
200eV/5keV 1203 1205
400eV/5keV2) 1266 1265


Beam
Discriminator thresholdspions 10 GeVpions+electrons 10 GeV
200eV/5keV 1213,1215,1217 1219
300eV/5keV


Beam
Discriminator thresholds pions+electrons 5 GeV
200eV/5keV 1225,1227,1231,1233,1235,1237,1239,1241,1251
400eV/5keV2) 1256,1259,1261,1263,1271,1272,1274


Fe55 calibration
1208,1214,1216,1218,1224,1226,1228,1232,1234,1236,
1238,1240,1250,1255,1257,1260,1262,1264,1267,1273
1) Only events with PLL<11 and bit5=1 should be analysed
2) Gas gain in sector was changed: 467 --> 427

Low level threshold scan for sector prototype

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Pions 180 GeV

Gas gain 2.5*104

Only events with PLL<11 and bit5=1 should be analysed

Threshold
200 eV 300 eV 400 eV 500 eV
1301,1302 1303 1304,1305 1306,1309

Gas gain 3.7*104

Threshold
133 eV 200 eV 266 eV 333 eV
1313,1314,1315 1318,1319 1320,1321 1324,1325

Beam position scan for sector prototype

Pions 180 GeV

Gas gain 2.5*104, High level threshold 5 keV

Only events with bit5=1 in PLL word should be analysed

Position, arb. units 200 eV 300 eV
-4 1358 1359
-3 1356,1357 1355
-2 1348 1349,1352
-1 1345,1346,13471344
0 1341 1342
1 1339,1340 1338
2.5 1330,1331 1332,1333

Target run

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Gas gain 3.7*104

Low level threshold 200 eV
High level threshold 5 keV

1383,1384,1389,1390,1391,1392


All raw data files are available on HPSS and can be accessed using the following path to the file: hpsssrv1:/hpss/cern.ch/atlas/testbeam/trt/2000/trt_xxxxxx.data, where xxxxxx - is the 6-digit run number including leading zeros.

Last updated 06-Oct-2000 by SS