CED Verification of DC Angle Theta and Wire Correspondance

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December 2016:CED Verification of DC Angle Theta and Wire Correspondance

Using CED to verify the angle and wire correlation,

Zooming in on the view paralell to the direction of the wires in ced, we can examine the wire corresponding theta angle in the drift chamber.

Table 1: Superlayer 1 Wire 1 Coordinates

Coordinates(cm)	Layer 1	Layer 2	Layer 3	Layer 4	Layer 5	Layer 6
x	20.42	21.51	21.39	22.49	22.37	23.47
y	0.00	0.00	0.00	0.00	0.00	0.00
z	243.41	244.18	245.51	246.28	247.62	248.38

Table 2: Superlayer 1 Wire 2 Coordinates

Coordinates(cm)	Layer 1	Layer 2	Layer 3	Layer 4	Layer 5	Layer 6
x	21.64	22.73	22.61	23.71	23.58	24.69
y	0.00	0.00	0.00	0.00	0.00	0.00
z	242.86	243.62	244.94	245.71	247.05	247.81

Corresponding theta angles can be found for other wires, in Region 1, Superlayers 1 and 2.

Table 3: Superlayer 1 Wire-Angle Theta Correspondence in Degrees

Wire Number	Layer 1	Layer 2	Layer 3	Layer 4	Layer 5	Layer 6
1	4.79	5.03	4.98	5.22	5.16	5.40
2	5.09	5.33	5.27	5.51	5.45	5.69
77	29.46	29.60	29.41	29.55	29.37	29.51
78	29.79	29.93	29.74	29.88	29.69	29.83
79	30.12	30.26	30.07	30.21	30.02	30.16
110	40.19	40.28	40.05	40.13	39.91	39.99
111	40.51	40.59	40.36	40.44	40.21	40.29
112	40.82	40.90	40.67	40.75	40.52	40.60

May 2017:CED Verification of DC Angle Theta and Wire Correspondance

Using CED to verify the angle and wire correlation,

Zooming in on the view paralell to the direction of the wires in ced, we can examine the wire corresponding theta angle in the drift chamber.

Table 1: Superlayer 1 Wire 1 Coordinates

Coordinates(cm)	Layer 1	Layer 2	Layer 3	Layer 4	Layer 5	Layer 6
x	21.01	22.11	21.98	23.08	22.95	24.07
y	0.00	0.00	0.00	0.00	0.00	0.00
z	243.13	244.89	245.23	245.99	247.33	248.12

Table 2: Superlayer 1 Wire 2 Coordinates

Coordinates(cm)	Layer 1	Layer 2	Layer 3	Layer 4	Layer 5	Layer 6
x	22.23	23.32	23.20	24.29	24.17	25.29
y	0.00	0.00	0.00	0.00	0.00	0.00
z	242.55	243.32	244.68	245.42	246.75	247.55

Using the expressions calculated for x and z, as well as the angle theta with respect to the beam line to the wire

[math]x(n)=20.9972+1.212\ n[/math]

[math]z(n)=243.1431-0.5652\ n[/math]

[math]\theta=\arctan{\frac{20.9972+n1.212}{243.1431-n0.5652}}[/math]

Table 4: Calculated Superlayer 1 Wire-Angle Theta Correspondence in Degrees

Wire Number	Layer 1
1	5.23
2	5.53
77	29.80
78	30.13
79	30.46
110	40.45
111	40.76
112	41.07

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