Study of radiation damage in silicon detectors for high ... - F9

106 7. Comparison with Other GroupsParameter biased unbiased global Batesg C [10 ;2 cm ;1 ] 4.00.6 2.20.4 1.770.07 2.50.3g Y [10 ;2 cm ;1 ] 5.40.8 5.60.9 4.60.3 5.90.3k Y 2(60 ) [10 ;18 cm 3 /s] 2.20.4 4.60.1 7.5 +15;2/Table 7.1: A comparison of reverse annealing parameters g C , g Y and k Y 2as obtained fromthe second order t (eq. 4.7). Values for biased samples is the average of samples I3, D3 andB3, table 4.4. g Y and k Y 2are however ambiguous due to partial bias at late stage of reverseannealing. Values for unbiased samples is the average for samples U3A and U3B, table 6.1. Inboth data 15% systematic error on the dosimetry is included in the quoted error. Results arecompared with a recent global survey [15] and results from S.J. Bates et al. [21].Parameter biased unbiased Ziockg C [10 ;2 cm ;1 ] 4.10.6 2.30.4 2.1g Y [10 ;2 cm ;1 ] 4.70.7 4.90.7 7.5k Y 1(60 )[10 ;6 s ;1 ] 3.90.6 8.20.3 12Table 7.2: A comparison of reverse annealing parameters g C , g Y and k Y 1as obtained from therst order t (eq. 4.6). Values for biased samples is the average of samples I3, D3 and B3, table4.4. g Y and k Y 1are ambiguous due to partial bias at late stage of reverse annealing. Values forunbiased samples is average for samples U3A and U3B, table 6.1. In both data 15% systematicerror on the dosimetry is included in the quoted error. Results are compared with values fromZiock parametrisation [45]. A relative damage factor 0.72 [57] was used to normalise Ziock data(647 and 800 MeV protons) to 1 MeV neutrons. Errors for Ziock datawere not given in [45].Parameter biased unbiased Ziock ROSEY (20 C) [10 ;10 cm ;1 s ;1 ] / 123 5.6 129Y (60 C) [10 ;7 cm ;1 s ;1 ] 2.20.5 3.30.5 2.5 64.5k link linTable 7.3: A comparison of reverse annealing parameters kYlin (see equation 4.10) at 20 C and60 C with results from ROSE report [13] and Ziock etal. [45]. g Y =(4:60:3)10 ;2 cm ;1 fromthe global data (table 7.1) was used with ROSE reverse annealing time constant. A relativedamage factor 0.72 [57] was used to normalise Ziock data (647 and 800 MeV protons) to 1 MeVneutrons. Errors for Ziock datawere not given in [45]. A 15% systematic error on the dosimetryis included in the error on our data.the eect of bias voltage as reported in this work. Parameters of long term annealing ofreverse current agree well with values, reported by M. Moll et al. [35].