Rods are identified by the layer number (TOB1 to TOB6), the letter P or M indicating the positive or negative z side, and a number going from 1 to the total number of rods in the layer. Therefore, for example, the rod n 23 of the second layer covering the positive z region is identified by the label TOB2P23.
In each layer rods are a two different radii. Rod # 1 is defined to be the first rod on the inner radius with the centre of gravity at positive phi, and then rods are numbered with increasing phi. Thus, the odd numbered rods are always on the inner radius and the even numbered on the outer radius of the layer.
The phi position of all rods is given by the table below.
Table 1: Phi positions of TOB rods.
The position given refers to the centre of gravity. In the first column
the position of rod #1 is given. In the second column the increment in angle
between consecutive rods. In the third column the position of the last rod.
In each cell, values are given in radians in the first row and in degrees in the second row (in red and bold).
| Layer # | n of rods | phi of rod #1 | increment | phi of last rod |
| TOB1 | N=42 | phi(1)=(1/16 - 1/21)* 2pi 5.3571 |
1/42 * 2pi 8.5714 |
phi(N) = phi(1) + 41/42 * 2pi 356.7857 |
| TOB2 | N=48 | phi(1)=(1/16 + 6/7 - 11/12 )* 2pi + .0190 2.1601 |
1/48 * 2pi 7.5000 |
phi(N) = phi(1) + 47/48 * 2pi 354.6601 |
| TOB3 | N=54 | phi(1)=(1/16 + 6/7 - 8/9 )* 2pi + .0342 13.0309 |
1/54 * 2pi 6.6667 |
phi(N) = phi(1) - 1/54 * 2pi 6.3643 |
| TOB4 | N=60 | phi(1)=(1/16 + 6/7 - 14/15)* 2pi + .1136 1.5802 |
1/60 * 2pi 6.0000 |
phi(N) = phi(1) + 59/60 * 2pi 355.5802 |
| TOB5 | N=66 | phi(1)=(1/16 + 6/7 - 10/11)* 2pi + .0810 8.4397 |
1/66 * 2pi 5.4545 |
phi(N) = phi(1) - 1/66 * 2pi 2.9851 |
| TOB6 | N=74 | phi(1)=(1/16 + 6/7 - 34/37)* 2pi + .0195 1.3779 |
1/74 * 2pi 4.8649 |
phi(N) = phi(1) + 73/74 * 2pi 356.5130 |
D.A.