MiniBooNE Meeting 4/22/05 Eric Prebys 1 Status of the Proton Source Haud ignota loquor* Eric Prebys *I say things that are known.

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Presentation transcript:

MiniBooNE Meeting 4/22/05 Eric Prebys 1 Status of the Proton Source Haud ignota loquor* Eric Prebys *I say things that are known

MiniBooNE Meeting 4/22/05 Eric Prebys 2 Fortitudine Vincimus 1 Booster performance has been steady and consistent with the Proton Plan since the shutdown. We were anticipating significant beam lost to NuMI by this time, but Diis aliter visum 2, and Malum quidem nullum esse sine aliquo bono 3 As of April 3, habemus VeXX 4 Ergo bibamus 5 1 By endurance we conquer 2 The gods decided otherwise 3 There is, to be sure, no evil without some good 4 We have 5e20 5 Therefore, let us drink.

MiniBooNE Meeting 4/22/05 Eric Prebys 3 Initial NuMI Progress

MiniBooNE Meeting 4/22/05 Eric Prebys 4 NuMI Target Status After two weeks of running, water was found in the oil of the vacuum pump which pumps out the target pipe. A scan confirmed that the volume was full of water. The target was removed and the water pumped out, but they have been unable to reproduce the leak. They have returned the target with a “water letter outer” added. Will attempt to run with a Helium overpressure in the target volume. Probably begin to take beam early next week.

MiniBooNE Meeting 4/22/05 Eric Prebys 5 Hourly Proton Rate Improved cogging stability

MiniBooNE Meeting 4/22/05 Eric Prebys 6 Efficiencies

MiniBooNE Meeting 4/22/05 Eric Prebys 7 Overall “Peak to Week” Efficiency

MiniBooNE Meeting 4/22/05 Eric Prebys 8 Integrated Delivery (BNB)

MiniBooNE Meeting 4/22/05 Eric Prebys 9 Issues In terms of beam loss, we are doing very well  Loss limit frequenty > 1E17 pph! However, we have not been able to hit high batch intensities  Typically 4-4.5E12  MB intensity limited by 5Hz rate This will become a bigger issue when NuMI comes back online Now that cogging is working, reaching high batch intensities is a priority.  Almost certainly related to our present slip stacking problems.

MiniBooNE Meeting 4/22/05 Eric Prebys 10 Major Ongoing Projects ORBUMP system  Major redesign of injection scheme 3 magnets versus 4 Eliminates problematic injection element (DCSEP)  Magnet and power supply will be ready for the 2005 shutdown (likely to start Nov 1) Dump reloction  Booster dump will be relocated from Long 13 to the MI-8 line.  This will eliminate one of the two extraction regions and should reduce loss significantly.