E-rhic-ir-l mailing list

["Berg, J Scott" <jsberg AT bnl.gov>]

For the energy measurement: if you had a set of 3 vertical kickers in one of the IRs with dipoles between them, you could create a vertical closed orbit bump and would kick the spin out of the vertical plane. You then monitor the polarization turn-by-turn, and the oscillation frequency tells you the energy. Maybe a single-turn kick doesn't create enough oscillation amplitude for a reasonable closed orbit bump, so you have something slower than a kicker (could existing correctors be fast enough?) to grow the oscillation amplitude.

 

-Scott

 

From: E-rhic-ir-l <e-rhic-ir-l-bounces AT lists.bnl.gov> On Behalf Of Aschenauer Elke-Caroline via E-rhic-ir-l
Sent: Monday, February 22, 2021 9:40 AM
To: E-rhic-ir-l AT lists.bnl.gov
Subject: [E-rhic-ir-l] IR to do list

 

Good Morning,

 

I thought the discussion on Friday was very good and it would make sense to generate a "to do list” accessible for everybody 

and document how a specific item has been resolved.

 

I have been thinking a bit more about the points over the weekend and actually I have one more for the list we talked about the uncertainty on the overall beam energy, this will be very important for the  physics as we rely on knowing the beam energy.

 

The other item I think we need to make a decision is that we really do as discussed on friday the solenoid compensation scheme without introducing vertical kicks at the IP.

 

Thanks elke

 

 

 

 

 

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