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Upcoming Upgrades and Testing of Bias Supplies for Booster Operations

On November 30th, 2011, updates regarding Booster Bias Supplies were announced. Two of the completed units are designated for the NOvA project, with one fully tested and operational, while the other requires troubleshooting for a slewing issue. A third supply is 40% complete and designated as a spare. The upgrade plan includes replacing components in ten "Ling" MK.I supplies to enhance performance and reliability. Further tests and evaluations of rectifiers and transformers are ongoing to ensure optimal function while minimizing potential risks.

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Upcoming Upgrades and Testing of Bias Supplies for Booster Operations

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  1. Booster Bias Supply Upgrade November 30th, 2011

  2. Three new Ferrite Bias Supplies Built • Two are complete – for NOvA • One is fully tested and operational • The other runs but needs further troubleshooting for odd slewing problem • Third one is 40% complete - Booster spare • Finished in the next 3-4 weeks • There are 10 “Ling” MK I supplies that will need upgrading – Booster West Gallery only • Replace main rectifier Transformer – marginal power rating for 15 Hz operation. • Replace PVC SCR heat sinks – prone to LCW water leaks with any pressure surge. • Upgrade can be done one at a time by changing out supply with spare.

  3. 2250A @ 1Hz 2250A @ 15Hz Ling transformer test, November 15th, 2011

  4. 2250A @ 15Hz Ling transformer test, November 16th, 2011

  5. 2250A @ 15Hzwith fans 2250A @ 15Hzwith fans and top plate lifted 3.5 inches Ling transformer test, November 17th and 18th, 2011

  6. MK I Bias Supply SCR Packages – PVC cased heat sinks

  7. New Style SCR Packages with Larger Transformer

  8. MK I Bias Supply Main Rectifier Transformer

  9. MK I Bias Supply SCR Packages with Main Rectifier Transformer - Behind

  10. Last transformer order was in 2007. The vender was NWL and they provided six units at a cost of $16,474 ea. • The expected lead time is 4-6 months so they should be sent out for bid ASAP.

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