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| # ITER Diagnos                                                        |
| tic Record of Discussion #: Nproto Rev: 00 Date: example WBS: 1.5.3.1 |
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| **Title:** Optical Design for Upper Endoscopes and Compatability with |
| 'Central Tube' Implementation                                         |
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| **Scope:** The US is responsible to deliver to ITER 6 endoscopic      |
| camera systems. The collection and relay optics for these systems are |
| located in 6 upper port plugs, with views of the divertor region.     |
| Metal mirrors in the plasma facing end of the plugs will form and     |
| relay Images in visible and IR light through shield apertures and     |
| through refractive optics and vacuum windows to cameras located just  |
| outside the bio-shield. The tasks below will focus on the design of   |
| the collection and relay optics and integration into the port plugs.  |
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| **Work Description/List of Tasks:**                                   |
|                                                                       |
| 1)  Review functional specifications and recommend changes to         |
|     optimize physics productivity of these systems.                   |
|                                                                       |
| 2)  Travel to EU to confer with experts on ITER endoscope design and  |
|     seek options for collaboration.                                   |
|                                                                       |
| 3)  Obtain optical design parameters for the reference endoscope      |
|     design and incorporate into optical model using a commercial      |
|     optical design package                                            |
|                                                                       |
| 4)  Modify design to be compatible with \'central tube\'              |
|     implementation in upper plugs and compare optical performance     |
|     capabilities.                                                     |
|                                                                       |
| 5)  Using both designs, assess optical performance and compare with   |
|     functional specifications with desired functional specifications. |
|                                                                       |
| 6)  Identify minimum tube diameter consistent with satisfying         |
|     endoscope performance parameters.                                 |
|                                                                       |
| 7)  Export optical designs to CAD model for upper port plug. (see     |
|     linked task below)                                                |
|                                                                       |
| 8)  Identify high priority R&D issues related to the upper camera     |
|     optical system.                                                   |
|                                                                       |
| 9)  Write report contrasting the features of both designs and, for    |
|     the central tube implementation, illustrating the dependence on   |
|     tube diameter                                                     |
|                                                                       |
| 10) Present summary of findings at a workshop or topical meeting and  |
|     provide copy of presentation                                      |
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| **Reference Documents:** 1) ITER FEAT Diagnostic Procurement Package  |
| 5.5.PG, 2) E. Gauthier, et al."Design of a wide-angle thermography    |
| and visible view diagnostic for JET," 32nd EPS Conference, Tarragona, |
| Spain (June 2005)                                                     |
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| **Deliverables:**                                                     |
|                                                                       |
| 1\) Report describing and comparing optical models                    |
|                                                                       |
| 2\) Present results at topical meeting, and provide electronic copy   |
| of presentation.                                                      |
|                                                                       |
| 3\) Optical design parameters and associated files for all completed  |
| models                                                                |
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| **Travel/Meetings:** 3 person trips, each 1 week, one US-UK, 2 US-US  |
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| **Linked Tasks/Institutions:** A parallel activity will be to obtain  |
| and manipulate the CATIA models for the Upper Port Plugs.and use the  |
| models to study the impact of the \'central tube\' implementation     |
| concept and integrating this concept. A performer for this activity   |
| has not yet been identified.                                          |
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| **Intellectual Property Intentions:** Report, presentations and       |
| optical designs will be publicly available for subsequent             |
| solicitations involving WBS 1.5.3.1 tasks.                            |
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| **Estimated Level of Effort:** 1.5 man-months physicist, 2 man-months |
| optical designer for tasks 1-7                                        |
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| **Estimated Start/End Dates:** 4/1/06-9/30/06                         |
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| **Interested Institution:**                                           |
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| **Key Personnel and Availability:**                                   |
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| **Key Tools and Availability:** OSLO Optical Design and Optimization  |
| Package -- Latest Version -- 1 license presently in use.              |
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| **Comments:**                                                         |
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| **USIPO Representative:**                                             |
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| **Institution Representative**:                                       |
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