Prague layout has MCMD unipixels in b-layer, 400 micr pixels in outer barrel layers and disks with flex modules. MCMD modules have 51 micr x 315 micr unipixels, no big or ganged pixels. Flex modules have 400 micr normal pixels, big 600 micr pixels between the chips and on the module edges, ganged pixels between electronic chips. New radial positions in barrel are R=4.14 cm for b-layer, R=9.7cm for second layer and R=12.7 cm for third layer. The tilt angles are -19.5 deg for b-layer and -17.5 deg. for second and third barrel layers. New disk z-positions are: 49.05 cm, 58. cm, 65. cm, 71. cm and 77. cm. The inner radius for the firsts three disks is Rinner=12. cm and for two other disks Rinner=9.7 cm. New design of the shingles staves for barrel layers are used. The material estimation was updated for barrel staves, flex modules and shell supports of the second and third barrel layers. Material in other support and service elements are the same as in the pixel TDR. Some plots with single particle simulation results for ATLAS EB 16.07.99:
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