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10
NSW envelopes New Small Wheel 15/02/2013 M. Ciapetti - G. Spi

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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 Presentation

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Page 1: NSW envelopes

NSW envelopes

New Small Wheel

15/02/2013 M. Ciapetti - G. Spigo

Page 2: NSW envelopes

2

Hub

Brass pins will be inserted into the hub to improve the spokes bending behavior

Page 3: NSW envelopes

3

Hub

Brass pins will be inserted into the hub to improve the spokes bending behavior

Page 4: NSW envelopes

4

Main structure

IP

IP

SS SPOKES

FEET SPOKES

LS SPOKES

Page 5: NSW envelopes

5

Full assembly

IP

IP

SSLS

SS SPOKES

LS SPOKESFEET

SPOKES

Page 6: NSW envelopes

6

LS spokes

LS spokes have been fortified and adapted to the current alignment bars

Page 7: NSW envelopes

7

NSW assembly envelope

Page 8: NSW envelopes

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

Page 9: NSW envelopes

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

Page 10: NSW envelopes

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