Pilot bunches in physics fills

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patrol-cz
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Joined: Sat Feb 19, 2011 5:36 pm

Pilot bunches in physics fills

Post by patrol-cz » Mon Mar 21, 2011 4:52 am

Hi!
This year, LHC uses a different filling scheme than the previous year. The pilot bunch in bucket 1 is not overinjected with a nominal one, and even more pilots (obviously 3) are injected to the rings, together with the nominal ones. What's the purpose of these small bunches ? Are they used for some measurements, or do they collide in a low-luminosity experiments like Alice ? They are not even visible in the dump screen...
With regards, Pavel

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