Complex bend vacuum chamber for NSLSII-U

WEO13
17 Sept 2025, 16:00
20m
The Loop

The Loop

Lund, Sweden
Contributed Oral Presentation Storage Rings Accelerators Session 2

Speaker

Michael Seegitz (Brookhaven National Laboratory, National Synchrotron Light Source II)

Description

While the NSLSII synchrotron is a third-generation light source providing outstanding brightness and flux, there is a robust R&D program in place to upgrade to a fourth generation, or beyond, facility. Inherent in the so-called complex-bend magnet and lattice designs are significant limitations on the beam and exit slot apertures of the vacuum chamber. These restrictions and the need for the vacuum chamber to be mechanically aligned and decoupled from the magnets impose unique challenges. For our chamber, the selected solution is not novel and utilizes an aluminum split clamshell design that has been done in many machines past and present. The adaptation of this design along with improved machining and welding should provide the most cost-effective solution. The geometrical and impedance solutions and structural and thermal modeling will be shown along with dynamic pressure simulations generated by Synrad and Molflow modeling code. With continuing changes in lattice and magnet parameters, a systematic, iterative approach to vacuum design has been implemented and will be presented.

Author

Michael Seegitz (Brookhaven National Laboratory, National Synchrotron Light Source II)

Co-authors

Aamna Khan (Brookhaven National Laboratory) Dean Hidas (National Synchrotron Light Source II) Marcelo Juni Ferreira (European Spallation Source) Paul Palecek (Brookhaven National Laboratory) Robert Todd (Brookhaven National Laboratory) Sushil Sharma (Brookhaven National Laboratory) Timur Shaftan (Brookhaven National Laboratory) Victor Smaluk (Brookhaven National Laboratory)

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