HEST Vacuum chambers
Several types of vacuum chambers exists on HEST. Except of the extraction region, HEST system is not baked out before the operation, so heating jackets, historically present on some chambers, are not necessary. The aperture (diameter) of HEST quadrupoles in 130 mm, what is the most important parameter for definition of vacuum chambers.
Here are several technical drawings of the chambers:
star-shape chambers in the quadrupoles GHADQD11 and GHADQD12, installed in 2018, VC-1033244-P-000.pdf