TRT test beam October 2001 short summary
High rate studies
pions 180 GeV 25 ns beam
Gas mixture: 65% Xe + 35% CO2
Gas gain for highrate prototype - 2.5x104
| | Threshold |
|---|
| Rate | 250 eV | 300 eV | 400 eV | 500 eV |
|---|
| 0 MHz | 1719*,1744 | 1720 | 1723 | 1730 |
| 5.2 MHz | 1746+1748 | 1750 | | |
| 11 MHz | 1731 | 1732+1738 | | |
| 11** MHz | 1741 | | | |
*) - Gas gain was higher for this run. The threshold corresponds to approx. 220 eV
**) - Increased voltage on straw matrix (1540 V instead of 1510 V)
Gas gain for highrate prototype - 3.7x104
| | Threshold |
|---|
| Rate | 200 eV | 250 eV | 300 eV | 400 eV |
|---|
| 0 MHz | 1751 | 1819+1822+1840 | 1841 | 1845 |
| 5.2 MHz | 1851 | | 1852 | |
| 11 MHz | 1849+1850 | | 1846+1848 | |
Gas mixture: 70% Xe + 10% CO2 + 20% CF4
Gas gain for highrate prototype - 2.5x104
| | Threshold |
|---|
| Rate | 250 eV | 300 eV |
|---|
| 0 MHz | 1854 | 1876+1879 |
| 11 MHz | 1857 | |
| 11* MHz | 1869 | 1873,1874+1875 |
*) - Increased voltage on straw matrix (1540 V instead of 1510 V)
All raw data files are accessible via CASTOR using the following path
to the file: /castor/cern.ch/atlas/testbeam/trttb/2001/trt_xxxxxx.data,
where xxxxxx - is the 6-digit run number including leading zeros.
Last updated 12-Nov-2001 by SS