Booster Bias Supply Upgrade November 30 th, 2011.

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Presentation transcript:

Booster Bias Supply Upgrade November 30 th, 2011

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.

Ling transformer test, November 15 th, Hz

Ling transformer test, November 16 th, Hz

Ling transformer test, November 17 th and 18th, Hz with fans and top plate lifted 3.5 inches

MK I Bias Supply SCR Packages – PVC cased heat sinks

New Style SCR Packages with Larger Transformer

MK I Bias Supply Main Rectifier Transformer

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

Last transformer order was in 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.