Table of Contents
2011/03/08
| Figure 1: Orientation of source holder and sources above crystal. |
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| 0100 | Place tower (G101 detector and source holder attached) in N2 purge cabinet. |
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Modifications to Schuba Extender Plugs
| 1600 | Use mill to shave 0.14” of copper off Schuba extender plug. |
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| M2 screws connecting Schuba extender plug pins to copper piece are too long. Replaced with M2 x 6 mm flat head screws. | |
| Due to reducing the thickness of the Schuba extender plug, the 0-80 x 1” screws are too long to fasten the side coax and plug to the tower. Replaced with shorter brass ones lying around the lab. |
| Figure 2: Original and modified Schuba extender plugs side-by-side. |
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| Figure 3: The modified extender now sits flush with the tower. |
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| Figure 4: Side coax now fits nicely. |
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| Figure 5: Close-up view of side coax connected to DIB1 and Schuba extender plug. | |
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Tower Level Continuity Checks
| 2000 | Tower level continuity check performed with Fluke 177 DMM. |
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| DMM can measure maximum resistance of 50 MΩ (ie. 20 nS). Fluke 87 DMM will arrive tomorrow. | |
| LED2 open at detector level. Not sure what happened. |
| Table 1: DIB1 tower level continuity check with Fluke 177 DMM. | |
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| Signal | Measured |
| QET A | 126.3 Ω |
| LED1 Rforward | 769 kΩ |
| LED2 Rforward | open |
| LED1 Vforward | 1.106 V |
| LED2 Vforward | open |
| LED1 Rreverse | <20 nS |
| LED2 Rreverse | <20 nS |
| Qo Rbias | 26 nS |
| Qo Ccoupling | <20 nS |
| Qo Rfeedback | 26 nS |
| Qi Rbias | 26 nS |
| Qi coupling | <20 nS |
| Qi Rfeedback | 26 nS |