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Performance of p-type micro-strip detectors after irradiation to 7.5/spl times/10/sup 15/ p/cm/sup 2/
2004 / IEEE / 0-7803-8700-7
This item was taken from the IEEE Conference ' Performance of p-type micro-strip detectors after irradiation to 7.5/spl times/10/sup 15/ p/cm/sup 2/ ' Exploiting the advantages of reading out segmented silicon from the n-side, we have produced test detectors with LHC pitch but 1 cm long strips which even after proton irradiation at the CERN PS to 7.5/spl times/10/sup 15/ cm/sup -2/ show signal to noise greater than 8:1 using LHC speed electronics. This dose exceeds by a factor of 2 that required for a replacement of the ATLAS semiconductor tracker to cope with an upgrade of the LHC to a Super-LHC with 10 times greater luminosity. These detectors were processed on p-type starting material of resistivity /spl sim/ 2 k/spl Omega/cm and, unlike n-in-n designs, only required single-sided processing. Such technology should therefore provide a relatively inexpensive route to replacing the central tracking at both ATLAS and CMS for Super-LHC. The shorter strip length is required to limit the noise. Even at these extreme doses 30% of the non-irradiated signal is seen. This 7000e/sup -/ signal (in 280 /spl mu/m thick sensors) is very competitive with the post irradiation performance of other, more exotic detector options. The hit density expected at a Super-LHC would anyway require a scaling down of the sense element length (for a given pitch) to retain an occupancy of less than 1% in the layers of the central tracker. We therefore propose such a 'stripsel' design as a possible low cost and easily implemented route to achieving the requirements for very high luminosity tracking at an upgraded LHC.
Lhc Speed Electronics
Atlas Semiconductor Tracker
Post Irradiation Performance
Very High Luminosity Tracking
Large Hadron Collider
Electronic Equipment Testing
Semiconductor Device Noise
P-type Microstrip Detector Performance
Position Sensitive Particle Detectors
Silicon Radiation Detectors