1. DIFFUSER HARDWARE REPORT V. Blackmore J. Cobb, M. Dawson, J. Tacon, M. Tacon

2.  Recap from CM27  Iris diffuser design  Progress: Manufacturing Actuators Controls Physics  Schedule Summary 2/11

3.  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

4.  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 1.6X o each Actuators (4) Diffuser Cassettes (4) Optical sensors (4) Iris Diffuser Design: Recap 4/11

5. 120 o 200mm Petals (Brass, W) Outer ring (Tufnol) Inner ring (Stainless) Pins (Stainless) Latest prototype requires 0.3Nm torque to open/close it. Cassettes: Prototype 5/11

6.  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! Progress 6/11

7.  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? Actuators 7/11

8. r z z=-6410mmz=-6090mm Downstream diffuser face @ z = -6010mm ? ? Select  here...... and see where they end up! Actuators 8/11

9. Largest beam: (10, 140) “Standard” beam: (6, 200) More in Tuesday’s talk... ~5% affected~0.5% affected Diffuser Material Diffuser Material Actuators are within this area. Actuators 9/11

10.  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 & Installation 10/11

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