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The 10-inch adventure
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click here for enlarged view |
In the framework of the TOM project we are developing 10-inch HPDs with 10 inch (25.4 cm) diameter. These are to our knowledge the largest HPDs ever built. These large HPDs are foreseen as focal plane detectors of the Air Cherenkov Telescope CLUE. |
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The development is carried out in 4 steps: |
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| 1. Rb2Te cathode. | Develop process and build 5-inch HPD. Done (spring 2002) | |
| 2. 10-inch tube with bialkali cathode | Done (PC108. Spring 2003). Equipped with 2048 pad Si sensor and 16 VA-prime chips. | |
| 3. 10-inch tube with quartz window | Planned for 2nd half 2003 | |
| 4. 10-inch tube with auto-triggering electronics | Planned for 2004 | |
Quantum efficiency of a sealed 5-inch HPD (PC99, 2048 channels) with Rb2Te cathode.
Some photos of the first 10-inch assembly in the evaporation tank. Click on them for full size.
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| The envelope heating element is made of 3 sub-elements. | Top view of envelope (lid of heating element removed) | Jacques and Christian during the assembly (Fri, 6 Dec 2002) |
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| Some photos of the first sealed and fully operational 10-inch tube, PC108, sometimes together with its little brother, the 5-inch Pad HPD. | ||
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Last updated by CJ: 14/05/03
