F.E.T.S. RFQ Support Structureby Peter Savage

21ST October 2009

The welded RFQ section support frame

Tops of strips and bottoms of feet to be machined flat and parallel.Total weight = 60kg

EN24 flat blocks x 2EN24 vee blocks x2

Made from box section mild steel

What is the load on each support structure?

Component # Weight (kg) Total weight (kg)

Major vane 2 60 120

Minor vane 2 30 65

Static tuner 15 2 30

Dynamic tuner 1 5 5

Vacuum pump 1 30 30

Cooling manifolds 4 4 16

Cooling water 1 5 5

Hanging pipes etc 10

Kinematics 1 12 12

Cradle 1 22 22

320kg

FEA for the RFQ support frame – using quarter model

Component Yield strength (MPa)

Ultimate strength (MPa)

Density (g/cm3)

ASTM A36 steel 250 400 7.80

Nodes: 22500Elements: 9857Quarter load: 75kg (300/4)Load applied: Top faces of padsSupport 1: Frictionless at

2 symmetry planes.Support 2: Fixed under footMaterial: Structural steelMass: 60kg

Results:Total deformation: 0.0027 mmMax equ. stress: 12MPaSafety factor: 20

Stress and deformation due to weight of RFQ

The kinematics assembly

Total weight = 12kg

The kinematic mount for the RFQ section

Complete kinematic assembly can be positioned by adjusting these screws

Screw jacks allow for RFQ height adjustment and tilt by resting in:1.cone – allows rotation only2.flat – allows movement in horizontal plane3.vee – allows movement in one axis

1

23

Springs reduce judder when re-positioning RFQ sections

RFQ welded steel support cradle

Cradle must:1.Support the RFQ section2.Allow RFQ section to be mounted to the kinematics3.Allow the RFQ section to be lifted by crane.

Total weight = 22kg

Cradle + kinematics + main support

Here the cradle is shown placed onto the kinematic system which in turn sits on the main frame. To adjust for height or tilt the screw

jacks must first be unlocked by undoing the 3 nuts shown.

To move the entire kinematic assembly in the horizontal plane these four nuts must first be undone

+/- 10mm

+/- 10mm

Case1: Under weight of RFQ

Nodes: 31838Elements: 12022Half load: 150kgLoad applied: Top of dummy RFQ.Support 1: Frictionless at

symmetry plane.Support 2: Fixed at screw jack

domes.Material: Structural steelMass: 22kg (cradle + jacks)

Results:Total deformation: 0.007 mmMax equ. stress: 11MPaSafety factor: 22

Case 2: Lifting RFQ

Nodes: 31838Elements: 12022Half load: 150kgLoad applied: Under hooksSupport 1: Frictionless at

symmetry plane.Support 2: Fixed at dummy RFQ

top (not shown).Material: Structural steelMass: 22kg (cradle + jacks)

Results:Total deformation: 0.007 mmMax equ. stress: 10MPaSafety factor: 25

WORK IN PROGRESS

RF coupling vessel support – parts re-use

RF coupling vessel support – parts re-use