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Re: CDC Layout
Hi Yves,
thanks for the clarification. I have one more question and one request:
Question: the central radius in the first table agrees with the central
radius
of the second and third table only for the first 4
layers. After that
there is a difference between the values of column 3
(radius center)
of the first table and column 4 of the second and third
table (r_c).
If this is correct then I do not understand what r_c means.
Request: could you also add to table two and three the actual values for
the stereo angles
in either rad or degree. When calculating the angles
using the values in the table
one gets rounding errors and they are significant when
taking an arcus tangens
from a ratio of already rounded values.
cheers,
Beni
> Hi Beni,
>
> Straw outer radius (OR) = 0.79375cm OD = 1.5875 cm
> Straw outer radius + 75um tolerance = 0.80125 or OD = 1.6025
>
> The program uses the OR + tolerance as actual OR to position the
> straws. That is why is sais global radius = 0.80125 cm. It is the
> radius it starts with. The program will vary the tolerence on the
> radius from 75-100 um to minimize the layer radius.
>
> Cheers,
> Yves
>
>
>
>
>
>
> /--------------------------------
> / Yves Van Haarlem
> _--~~--_ /
> /~/_| |_\~\ / Carnegie Mellon University
> |____________| / Department of Physics
> |[][][][][][]|:= / Wean Hall room 8404
> __| __ |__ \ Pittsburgh, PA 15213
> | ||. | == | | \ USA
> (| ||__| == | |) \
> | |[] [] == | | \ Tel.: +1 412 268-6949
> | |____________| | \ +1 412 641-9252
> /__\ /__\ \ Fax.: +1 412 681-0648
> ~~ ~~ \-----------------------------------
>
> On Sun, 1 Mar 2009, Beni Zihlmann wrote:
>
>> Hi Curtis,
>> I see here one inconsistency.
>> at point 1) the OD of a straw is given as 1.5875 cm but below
>> in Global Information the Tube radius is given as 0.801250 cm ??
>>
>> cheers,
>> Beni
>>> Hi Everyone -
>>>
>>> based on the dicsussions that we held this morning, Yves and I
>>> changed the layout rules for wire spacing. We now do the following:
>>>
>>> 1) Nominal Tube OD is 1.5875 cm
>>> 2) We require a spacing of at least 150 microns and no more than
>>> 200 microns between straws.
>>> 3) We allowed layer 1 to move in from 10.95cm to 10.69 cm (wire
>>> position) --- 2.6 mm
>>>
>>> We can now get 28 layers with 3500 wires in the allocated space. The
>>> wire position of the 28'th layer is at 54.488cm.
>>>
>>> If we loosen rule (2) to be 150 to 225, we can leave layer 1 at 10.95
>>> cm, layer 28 will be at 54.737 and we will have 3528 wires. We pretty
>>> much shifted things out by the 2.6 mm and picked up 28 channels.
>>>
>>> Unless people scream a lot, we would like to go with the first option
>>> (3500 channels). The information on that is as given in the following.
>>>
>>> Curtis and Yves
>>> --------------------------------------------------------------------------------------------------------
>>>
>>> Global Information:
>>>
>>> Tube radius: 0.801250
>>> Instrumented Layers is 28
>>> Instrumented Channels is 3500
>>> layer number radius(center) radius(plate) stereo
>>> $ 1$ & $ 42$ & $ 10.692$ & $ 10.692$ & $ 0.000$ & $ 10.692$ \\
>>> $ 2$ & $ 42$ & $ 12.046$ & $ 12.046$ & $ 0.000$ & $ 1.354$ \\
>>> $ 3$ & $ 54$ & $ 13.757$ & $ 13.757$ & $ 0.000$ & $ 1.711$ \\
>>> $ 4$ & $ 54$ & $ 15.119$ & $ 15.119$ & $ 0.000$ & $ 1.362$ \\
>>> $ 5$ & $ 66$ & $ 16.913$ & $ 18.659$ & $ 0.105$ & $ 1.794$ \\
>>> $ 6$ & $ 66$ & $ 18.288$ & $ 20.176$ & $ 0.113$ & $ 1.375$ \\
>>> $ 7$ & $ 79$ & $ 20.312$ & $ 21.787$ & $ 0.105$ & $ 2.024$ \\
>>> $ 8$ & $ 79$ & $ 21.694$ & $ 23.270$ & $ 0.112$ & $ 1.383$ \\
>>> $ 9$ & $ 92$ & $ 23.600$ & $ 24.882$ & $-0.105$ & $ 1.906$ \\
>>> $10$ & $ 92$ & $ 24.982$ & $ 26.338$ & $-0.111$ & $ 1.382$ \\
>>> $11$ & $105$ & $ 26.919$ & $ 28.049$ & $-0.105$ & $ 1.937$ \\
>>> $12$ & $105$ & $ 28.302$ & $ 29.490$ & $-0.110$ & $ 1.383$ \\
>>> $13$ & $122$ & $ 31.124$ & $ 31.124$ & $ 0.000$ & $ 2.822$ \\
>>> $14$ & $122$ & $ 32.502$ & $ 32.502$ & $ 0.000$ & $ 1.378$ \\
>>> $15$ & $134$ & $ 34.170$ & $ 34.170$ & $ 0.000$ & $ 1.668$ \\
>>> $16$ & $134$ & $ 35.548$ & $ 35.548$ & $ 0.000$ & $ 1.378$ \\
>>> $17$ & $145$ & $ 37.179$ & $ 38.006$ & $-0.105$ & $ 1.632$ \\
>>> $18$ & $145$ & $ 38.566$ & $ 39.423$ & $-0.109$ & $ 1.386$ \\
>>> $19$ & $157$ & $ 40.272$ & $ 41.036$ & $-0.105$ & $ 1.706$ \\
>>> $20$ & $157$ & $ 41.660$ & $ 42.450$ & $-0.108$ & $ 1.388$ \\
>>> $21$ & $169$ & $ 43.351$ & $ 44.062$ & $ 0.105$ & $ 1.691$ \\
>>> $22$ & $169$ & $ 44.739$ & $ 45.473$ & $ 0.108$ & $ 1.388$ \\
>>> $23$ & $181$ & $ 46.421$ & $ 47.086$ & $ 0.105$ & $ 1.682$ \\
>>> $24$ & $181$ & $ 47.810$ & $ 48.494$ & $ 0.108$ & $ 1.389$ \\
>>> $25$ & $196$ & $ 50.116$ & $ 50.116$ & $ 0.000$ & $ 2.306$ \\
>>> $26$ & $196$ & $ 51.501$ & $ 51.501$ & $ 0.000$ & $ 1.385$ \\
>>> $27$ & $208$ & $ 53.105$ & $ 53.105$ & $ 0.000$ & $ 1.605$ \\
>>> $28$ & $208$ & $ 54.488$ & $ 54.488$ & $ 0.000$ & $ 1.383$ \\
>>>
>>>
>>> ---------------------------------------------------------------------------------------------------------------
>>>
>>> First hole in each layer (length in centimeters) Upstream Endplate
>>> (inside chamber) (outside chamber)
>>> Lyr num dPhi r_c r_p x_p y_p z_p
>>> x_p y_p z_p
>>> 1 42 0.14960 10.6919 10.6919 ( 10.6919 0.0000 0.00 ) (
>>> 10.6919 0.0000 -0.95 )
>>> 2 42 0.14960 12.0460 12.0460 ( 12.0123 0.9002 0.00 ) (
>>> 12.0123 0.9002 -0.95 )
>>> 3 54 0.11636 13.7569 13.7569 ( 13.7470 0.5237 0.00 ) (
>>> 13.7470 0.5237 -0.95 )
>>> 4 54 0.11636 15.1191 15.1191 ( 15.0491 1.4530 0.00 ) (
>>> 15.0491 1.4530 -0.95 )
>>> 5 65 0.09666 16.7307 18.4941 ( 16.7307 7.8813 0.00 ) (
>>> 16.7307 7.9814 -0.95 )
>>> 6 65 0.09666 18.1112 20.0201 ( 17.6779 9.3967 0.00 ) (
>>> 17.6726 9.5049 -0.95 )
>>> 7 79 0.07953 20.2489 21.7286 ( 20.3732 7.5541 0.00 ) (
>>> 20.3748 7.6542 -0.95 )
>>> 8 79 0.07953 21.6272 23.2077 ( 21.4220 8.9270 0.00 ) (
>>> 21.4195 9.0339 -0.95 )
>>> 9 92 0.06830 23.5842 24.8663 ( 23.5842 -7.8813 0.00 ) (
>>> 23.5842 -7.9814 -0.95 )
>>> 10 92 0.06830 24.9651 26.3222 ( 25.2354 -7.4856 0.00 ) (
>>> 25.2390 -7.5915 -0.95 )
>>> 11 104 0.06042 26.8017 27.9365 ( 26.7313 -8.1169 0.00 ) (
>>> 26.7304 -8.2170 -0.95 )
>>> 12 104 0.06042 28.1916 29.3852 ( 28.3625 -7.6847 0.00 ) (
>>> 28.3648 -7.7899 -0.95 )
>>> 13 122 0.05150 31.2679 31.2679 ( 31.2662 -0.3247 0.00 ) (
>>> 31.2662 -0.3247 -0.95 )
>>> 14 122 0.05150 32.6520 32.6520 ( 32.6481 0.5017 0.00 ) (
>>> 32.6481 0.5017 -0.95 )
>>> 15 134 0.04689 34.2552 34.2552 ( 34.2544 0.2312 0.00 ) (
>>> 34.2544 0.2312 -0.95 )
>>> 16 134 0.04689 35.6366 35.6366 ( 35.6204 1.0758 0.00 ) (
>>> 35.6204 1.0758 -0.95 )
>>> 17 145 0.04333 37.2487 38.0733 ( 37.3593 -7.3388 0.00 ) (
>>> 37.3608 -7.4389 -0.95 )
>>> 18 145 0.04333 38.6376 39.4931 ( 38.9083 -6.7711 0.00 ) (
>>> 38.9120 -6.8749 -0.95 )
>>> 19 157 0.04002 40.3422 41.1049 ( 40.2962 -8.1133 0.00 ) (
>>> 40.2957 -8.2134 -0.95 )
>>> 20 157 0.04002 41.7323 42.5212 ( 41.8443 -7.5571 0.00 ) (
>>> 41.8457 -7.6607 -0.95 )
>>> 21 169 0.03718 43.4265 44.1359 ( 43.3664 8.2059 0.00 ) (
>>> 43.3656 8.3060 -0.95 )
>>> 22 169 0.03718 44.8172 45.5493 ( 44.5899 9.2992 0.00 ) (
>>> 44.5872 9.4024 -0.95 )
>>> 23 181 0.03471 46.4992 47.1624 ( 46.5878 7.3398 0.00 ) (
>>> 46.5889 7.4399 -0.95 )
>>> 24 181 0.03471 47.8901 48.5731 ( 47.8428 8.3910 0.00 ) (
>>> 47.8422 8.4941 -0.95 )
>>> 25 197 0.03189 50.4467 50.4467 ( 50.4439 -0.5335 0.00 ) (
>>> 50.4439 -0.5335 -0.95 )
>>> 26 197 0.03189 51.8336 51.8336 ( 51.8329 0.2784 0.00 ) (
>>> 51.8329 0.2784 -0.95 )
>>> 27 209 0.03006 53.4403 53.4403 ( 53.4393 0.3198 0.00 ) (
>>> 53.4393 0.3198 -0.95 )
>>> 28 209 0.03006 54.8255 54.8255 ( 54.8134 1.1521 0.00 ) (
>>> 54.8134 1.1521 -0.95 )
>>> First hole in each layer (length in centimeter) Downstream Endplate
>>> (inside chamber) (outside chamber)
>>> Lyr num dPhi r_c r_p x_p y_p z_p
>>> x_p y_p z_p
>>> 1 42 0.14960 10.6919 10.6919 ( 10.6919 0.0000 150.00 ) ( 10.6919
>>> 0.0000 150.60 )
>>> 2 42 0.14960 12.0460 12.0460 ( 12.0123 0.9002 150.00 ) ( 12.0123
>>> 0.9002 150.60 )
>>> 3 54 0.11636 13.7569 13.7569 ( 13.7470 0.5237 150.00 ) ( 13.7470
>>> 0.5237 150.60 )
>>> 4 54 0.11636 15.1191 15.1191 ( 15.0491 1.4530 150.00 ) ( 15.0491
>>> 1.4530 150.60 )
>>> 5 65 0.09666 16.7307 18.4941 ( 16.7307 -7.8813 150.00 ) ( 16.7307
>>> -7.9444 150.60 )
>>> 6 65 0.09666 18.1112 20.0201 ( 18.5023 -7.6467 150.00 ) ( 18.5056
>>> -7.7148 150.60 )
>>> 7 79 0.07953 20.2489 21.7286 ( 20.1193 -8.2065 150.00 ) ( 20.1183
>>> -8.2695 150.60 )
>>> 8 79 0.07953 21.6272 23.2077 ( 21.8203 -7.9039 150.00 ) ( 21.8219
>>> -7.9712 150.60 )
>>> 9 92 0.06830 23.5842 24.8663 ( 23.5842 7.8813 150.00 ) ( 23.5842
>>> 7.9444 150.60 )
>>> 10 92 0.06830 24.9651 26.3222 ( 24.6657 9.1903 150.00 ) ( 24.6635
>>> 9.2570 150.60 )
>>> 11 104 0.06042 26.8017 27.9365 ( 26.8700 7.6452 150.00 ) ( 26.8706
>>> 7.7082 150.60 )
>>> 12 104 0.06042 28.1916 29.3852 ( 28.0076 8.8916 150.00 ) ( 28.0062
>>> 8.9579 150.60 )
>>> 13 122 0.05150 31.2679 31.2679 ( 31.2662 -0.3247 150.00 ) ( 31.2662
>>> -0.3247 150.60 )
>>> 14 122 0.05150 32.6520 32.6520 ( 32.6481 0.5017 150.00 ) ( 32.6481
>>> 0.5017 150.60 )
>>> 15 134 0.04689 34.2552 34.2552 ( 34.2544 0.2312 150.00 ) ( 34.2544
>>> 0.2312 150.60 )
>>> 16 134 0.04689 35.6366 35.6366 ( 35.6204 1.0758 150.00 ) ( 35.6204
>>> 1.0758 150.60 )
>>> 17 145 0.04333 37.2487 38.0733 ( 37.1301 8.4222 150.00 ) ( 37.1292
>>> 8.4852 150.60 )
>>> 18 145 0.04333 38.6376 39.4931 ( 38.3164 9.5686 150.00 ) ( 38.3140
>>> 9.6339 150.60 )
>>> 19 157 0.04002 40.3422 41.1049 ( 40.3869 7.6491 150.00 ) ( 40.3873
>>> 7.7121 150.60 )
>>> 20 157 0.04002 41.7323 42.5212 ( 41.6118 8.7470 150.00 ) ( 41.6109
>>> 8.8122 150.60 )
>>> 21 169 0.03718 43.4265 44.1359 ( 43.4843 -7.5563 150.00 ) ( 43.4847
>>> -7.6193 150.60 )
>>> 22 169 0.03718 44.8172 45.5493 ( 45.0140 -6.9627 150.00 ) ( 45.0156
>>> -7.0278 150.60 )
>>> 23 181 0.03471 46.4992 47.1624 ( 46.4044 -8.4218 150.00 ) ( 46.4037
>>> -8.4848 150.60 )
>>> 24 181 0.03471 47.8901 48.5731 ( 47.9357 -7.8429 150.00 ) ( 47.9361
>>> -7.9078 150.60 )
>>> 25 197 0.03189 50.4467 50.4467 ( 50.4439 -0.5335 150.00 ) ( 50.4439
>>> -0.5335 150.60 )
>>> 26 197 0.03189 51.8336 51.8336 ( 51.8329 0.2784 150.00 ) ( 51.8329
>>> 0.2784 150.60 )
>>> 27 209 0.03006 53.4403 53.4403 ( 53.4393 0.3198 150.00 ) ( 53.4393
>>> 0.3198 150.60 )
>>> 28 209 0.03006 54.8255 54.8255 ( 54.8134 1.1521 150.00 ) ( 54.8134
>>> 1.1521 150.60 )
>>>
>>>
>>
>>