Fermilab / UChicago Electron-Lens Meeting

Wednesday 13 Dec 2023, 14:00 → 15:00 US/Central

14:00 → 14:20 General Updates

• MaryKate is focusing on analyzing data from the NIOLD experiment. She met with Giulio last week on finishing the electron gun design report.
• Sergei K. will work with Nilanjan on writing a report on the Cyclotron Emission Monitor. Here's the suggested outline:
  • Motivation for the monitor. What can it measure and how is it useful?
  • Past attempts at building such an instrument including what has been done in other fields. What do we have now?
  • Range of parameters relevant to our implementation, including a demonstration at the test stand and also a device at IOTA.
  • Proposal for the structure of the device.
  • A rough evaluation of the costs and timeline to build this device.
• John is working on uploading all the required documents to run the bidding process.
• We will skip the next 2 meetings, and meet again on January 3, 2024.

14:20 → 15:00 Proton parameter calculations for an ensemble of lattices

Speaker: Nilanjan Banerjee (Fermilab)

2023_12_13_ProtonParametersRevisited.pdf

• While the IBS module in MAD-X does not support linear transverse coupling, a few years back Sergei and Valeri wrote a paper on IBS calculations including transverse coupling. See https://arxiv.org/abs/1812.09275 Does any code implement this?
• The terminology for Residual Gas Scattering should be: single vs multiple scattering.
• The design of the lattice and the optimization scheme should be documented. The spread of values of various growth rates and dynamics is a result of the wide landscape of lattices for electron cooling studies and does not represent a confidence interval on the expected values.
• How do the emittance growth rates vary for different beam parameters such as energy and emittances?
• A different approach would be to fix a lattice and beam parameters and then introduce other sources of uncertainty, such as lattice errors. This might be an useful method to analyze fixed lattices such as the NIO lattice.
• Is there a way to get quick estimates of the emittance growth rates before going into detailed calculations with different lattices?