DIFFUSER HARDWARE REPORT

V. Blackmore

J. Cobb, M. Dawson, J. Tacon, M. Tacon

Recap from CM27 Iris diffuser design Progress:

Manufacturing Actuators Controls Physics

Schedule

Summary2/11

Redesigned diffuser. Simpler, faster, neater

Proto-prototype built in ~few days and brought to CM27

Improvements made based on comments ‘Cassettes’ – G. Barber

Oxford DO review & Technical Board review completed.

The Story So Far...3/11

Four in-line irises contained in cassettes. Controlled by pneumatic

rotary actuators upstream.

Simple optical sensors on shafts give iris status.

Contains 3 radiation lengths of material: 0.2, 0.4, 0.8 and 1.6Xo each

Actuators(4)

Diffuser Cassettes (4)

Opticalsensors (4)

Iris Diffuser Design: Recap4/11

120o

200mm

Petals(Brass, W)

Outer ring (Tufnol)

Inner ring (Stainless)

Pins (Stainless)

Latest prototype requires 0.3Nm torque to open/close it.

Cassettes: Prototype5/11

Completed: All Tufnol parts (cassette

rings, support rings).

Spacers & gears.

Air block.

Approx. 40% complete

Demonstrated prototype. Purchased and tested

actuator. Production drawings.

In Progress: Acquire remaining

materials (~few weeks lead time)

Modify actuators. Test a cassette with brass

petals. Test optical sensors. Modify air crate. Modify electronics crate

and control software. Integrate with EPICS.

Possibility of moving diffuser further into SS?

Still on course!

Progress6/11

Completed: Bought one actuator to test and modify. Works well at 2bar at the end of an 8m pipe.

In progress: Replacement of magnetic components.

Problems: Cover a small fraction of the aperture. Can offset actuators radially with some

additional mechanics. Do we want to do this?

Actuators7/11

r

z

z=-6410mm z=-6090mm

Downstreamdiffuser face@ z = -6010mm

?

?

Select here...

... and see where they end up!

Actuators8/11

Largest beam: (10, 140)

“Standard” beam:(6, 200)

More in Tuesday’s talk...

~5% affected ~0.5% affected

DiffuserMaterial

DiffuserMaterial

Actuators are within this area.

Actuators9/11

Air crate: Re-using air crate Have sufficient solenoid

valves, etc. Rebuild and rewire crate

(soon) New front panel and indicators

Electronics crate: Re-using crate from old

design. Some rewiring New front panel

Labview & EPICs: Easily modified Easier integration into EPICs.

Plug-&-Play! Install crates.

Install pipes and cables.

Install drum on patch panel.

Insert cassette assembly into drum.

Mount actuators.

Connect pipes and cables.

Test, test, test!

Use!

No infrastructure changes necessary.

Controls & Installation10/11

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