| 41 | | |
| | 40 | |
| | 41 | == Notes: == |
| | 42 | |
| | 43 | **Present:** JB, KL, AK, HT, LC |
| | 44 | |
| | 45 | 1. Notes and actions from [wiki:Research/Instrumentation/Meetings/2019/06-05 last meeting]: |
| | 46 | * **AK** agreed to find minimum bending radius; |
| | 47 | * Stands: Not yet established. AL will ask Saint Gobain when placing order for clear fibre. |
| | 48 | * **LC** will consider options for stopping the unravelling during manufacture. |
| | 49 | * LC took advice from J.Tarrant. Hard to implement a clamp. Idea to try double-sided tape to lock fibre down. LC also consulted Inspection Lab staff. They have a concept to print the bushes. They will inspect what is made. |
| | 50 | * **AK,KL** place an order for clear fibre |
| | 51 | * Stands. AK agreed to place the order. |
| | 52 | * **HT** check use of (e.g.) 50 micron aluminium in simulation |
| | 53 | * Agenda item. |
| | 54 | * **JB** supply printed circuit board spec |
| | 55 | * Done. Specifications sent to LC. |
| | 56 | |
| | 57 | 2. Design update: LC \\ |
| | 58 | * [raw-attachment:image001.jpg Winding jig.] |
| | 59 | * Agreed to adopt 25mm minimum bending radius. Implies that specs of winding jig needs to be revised. |
| | 60 | * We **//agreed//** to move to building prototype winding gear. **LC** will produce drawings so that we can go out for quote. Imperial w/s and R12 to be considered in quoting process. |
| | 61 | * LC consulted Resin Lab. Recommendation to heat Araldite 2011 to 40-degrees. Equivalently, could use Araldite 2014 -- similar properties, but grey. Resin Lab can mix black Araldite. |
| | 62 | * Discussion of material for frame and potting scheme. Some preference for carbon fibre and black epoxy floated on the doublet layer to support and to exclude light. |
| | 63 | |
| | 64 | 3. Simulation update: HTL \\ |
| | 65 | * [raw-attachment:HTL_FilmMaterialComparison.pdf Slides.] |
| | 66 | * **//Agreed//** **HT** would do simulation with fibres potted in Araldite. |
| | 67 | * JB asks for estimate of photons per second and photons per spill to help him specify readout. **HT** will try and estimate from simulation. |
| | 68 | * HT's estiamte of particle rate: |
| | 69 | * Proton rate 10^9; Carbon 10^8 in a 5s spill. **HT** will find out the rep rate. |
| | 70 | * JB: corrolary: what is the light yield of the source that we'll used to characterise the planes. Need to inject representative electron beam in simlation (**HT**). |
| | 71 | |
| | 72 | 4. Optical readout considerations: JB \\ |
| | 73 | * JB will propose an optical readout scheme when an estimate of light o/p has been made. We **//agreed//** that readout specification would be made within a month. |
| | 74 | |
| | 75 | 5. Next steps |
| | 76 | * Goal is to carry out the actions agreed above and be ready to make initial winding trials in one month. |
| | 77 | |
| | 78 | 6. DONM |
| | 79 | * 25Jun19: 11:00 |
| | 80 | |
| | 81 | 7. AoB |
| | 82 | * HTL: Simulation generates energy deposition rather thann light yeild. We agreed to use MICE prescription to move from energy to light. |
| | 83 | |
| | 84 | **Actions:** |
| | 85 | * **AK:** Establish minimum bending radius. |
| | 86 | * **AK:** Place an order for clear fibre. |
| | 87 | * **LC:** Produce drawings for quote. |
| | 88 | * **HT:** Simulate doublet layers potted in Araldite. |
| | 89 | * **HT:** Try and estimate light yield from simulation. |
| | 90 | * **HT:** Find MedAustron rep rate. |
| | 91 | * **HT:** Inject 90Sr electrons to estimate test-rig light yeild. |
