NSW envelopes

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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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Updated structure

NSW envelopesNew Small Wheel

15/02/2013M. Ciapetti - G. SpigoHub2

Brass pins will be inserted into the hub to improve the spokes bending behaviorHub3

Brass pins will be inserted into the hub to improve the spokes bending behaviorMain structure4

IPIPSS SPOKESFEET SPOKESLS SPOKESFull assembly5

IPIPSSLSSS SPOKESLS SPOKESFEET SPOKESLS spokes6

LS spokes have been fortified and adapted to the current alignment barsNSW assembly envelope

7Sectors envelopes radial sizehq[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]2.77.68963657079749474447859955.81005.11011.81061.1460680927.7953.030897.7923.0--1.330.48944168.14383.04412.44627.3--4383.04627.3304413.04657.34460464747.0-10.3Referring 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 chambers8Large Sector envelope9

This cut is necessaryTO BE CHECKEDThe envelope has changed slightlysTGCs are 59mm shorter than the envelope out of h rangeSmall Sector envelope10

sTGCs are 121mm shorter than the envelope out of h rangeOnly 27mm from the spoke CRITICALOnly 3mm from the spoke CRITICAL