nsw envelopes
DESCRIPTION
NSW envelopes. New Small Wheel. 15/02/2013. M. Ciapetti - G. Spigo. Hub. Brass pins will be inserted into the hub to improve the spokes bending behavior. Hub. Brass pins will be inserted into the hub to improve the spokes bending behavior. Main structure. IP. IP. LS SPOKES. - PowerPoint PPT PresentationTRANSCRIPT
NSW envelopes
New Small Wheel
15/02/2013 M. Ciapetti - G. Spigo
2
Hub
Brass pins will be inserted into the hub to improve the spokes bending behavior
3
Hub
Brass pins will be inserted into the hub to improve the spokes bending behavior
4
Main structure
IP
IP
SS SPOKES
FEET SPOKES
LS SPOKES
5
Full assembly
IP
IP
SSLS
SS SPOKES
LS SPOKESFEET
SPOKES
6
LS spokes
LS spokes have been fortified and adapted to the current alignment bars
7
NSW assembly envelope
8
Sectors envelopes radial size
h q[deg]
Envelope thickness
[mm]
LSSIP
NOMINAL
[mm]
LLSIP
NOMINAL
[mm]
LSSHO
NOMINAL
[mm]
LLSHO
NOMINAL
[mm]
rSSIP
[mm]rSSHO
[mm]rLSIP
[mm]rLSHO
[mm]wSS
[mm]wLS
[mm]hSS EFFECTIVE
[mm]
hLS
EFFECTIVE
[mm]
Frame thickness
[mm]
hSS
ENVELOPE
[mm]
hLS
ENVELOPE
[mm]
hSS MAX
[mm]hLS MAX
[mm]
2.7 7.6896365 7079 7494 7444 7859
955.8 1005.1 1011.8 1061.1 460 680 927.7 953.0 30 897.7 923.0 - -
1.3 30.4894 4168.1 4383.0 4412.4 4627.3 - - 4383.0 4627.3 30 4413.0 4657.3 4460 4647
47.0 -10.3
Referring to what has been presented on 01/02/2013 regarding the radial dimensions of the sectors, due to the NSW (slightly) different position in z, these dimensions have been (slightly) changed:
This means that to cover the desired h range (1.3 ÷ 2.7), the effective detecting area must have the following radial distances from the beam axis:
Small Sectors: from 927mm to 4383mm (zmid SS = 7261.5mm)Large Sectors: from 953mm to 4628mm (zmid LS = 7676.5mm)
Assuming a 30mm thick wedge assembly frame, the large sectors should be extended ≈10mm towards the EIL4 chambers
9
Large Sector envelopeThis cut is necessaryTO BE
CHECKED
The envelope has changed slightly
sTGCs are 59mm shorter than the envelope out
of h range
10
Small Sector envelope
sTGCs are 121mm shorter than the envelope out
of h range
Only 27mm from the spoke CRITICAL
Only 3mm from the spoke CRITICAL